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Chapter 8

421

IF Section

Log Amplifier Assembly (P/O A4)

Log Amplifier Assembly (P/O A4)

The log amplifier assembly on A4 performs several functions. It
provides log and linear paths converting the 10.7 MHz IF signal to
video. In addition it also provides offset circuitry, AM/FM demodulator
circuitry, a frequency counter output, and down conversion of the 10.7
MHz IF to 4.8 kHz for use by the digital IF.

The log amp results are realized by using a wide dynamic range linear
detector followed by a video log amp. The detector is used for both
linear and log paths and contains a mixer that acts as the down
converter mixer for the digital IF.

CAUTION

For troubleshooting, it is recommended that you use an active probe,
such as an HP 85024A, and another spectrum analyzer. If an HP 1120A
active probe is being used with a spectrum analyzer having dc coupled
inputs, such as the HP 8566A/B, HP 8569A/B and the HP 8562A/B,
either set the active probe for an ac-coupled output or use a dc-blocking
capacitor between the active probe and the spectrum analyzer input.
Failure to do this can result in damage to the spectrum analyzer or the
probe.

Log Amplifier

Refer to function blocks K, L, and AE of A4 Log Amplifier Schematic
Diagram in the

HP 8560 E-Series Spectrum Analyzer Component Level

Informatio

n. The log amplifier receives the detected video signal from

the Detector/Mixer and outputs a voltage proportional to the log of the
input voltage. The linear output is tapped off at the emitter of U501D.
U507 provides input offset adjustment capability and adjusts the offset
of the op amp formed by U501A, B, C, and D. Q502 is a buffer. Q501
switches in additional offset for digital RBWs. The logarithmic
characteristic of the base-emitter junction of U502B is used in the
feedback path to produce the logging affect. U502D is used to adjust for
non-linearities in the linear mode. R531 is used to adjust log fidelity at
the top of the screen.

Use the following steps to verify proper operation of the log amplifier
chain:

1. Press

CAL

and

IF ADJ OFF

. Set the digital multimeter to read dc volts

and connect the negative lead to the chassis of the spectrum
analyzer.

2. Remove W27 from A4J3 and inject a 10.7 MHz signal of +10 dBm

into A4J3.

3. Set the spectrum analyzer to log mode, with a resolution bandwidth

of 300 kHz and single sweep.

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Summary of Contents for 8560E

Page 1: ...an effort to help you support your product This manual provides the best information we could find It may be incomplete or contain dated information and the scan quality may not be ideal If we find a better copy in the future we will add it to the Agilent website Support for Your Product Agilent no longer sells or supports this product You will find any other available product information on the A...

Page 2: ...Service Guide HP 8560E and 8560EC Spectrum Analyzers Manufacturing Part Number 08560 90157 Supersedes 08560 90149 Printed in USA December 1999 Copyright 1990 1999 Hewlett Packard Company ...

Page 3: ...ions at the time of shipment from the factory Hewlett Packard further certifies that its calibration measurements are traceable to the United States National Institute of Standards and Technology to the extent allowed by the Institute s calibration facility and to the calibration facilities of other International Standards Organization members General Safety Considerations The following safety not...

Page 4: ...a procedure that if not correctly performed or adhered to could result in damage to or destruction of the instrument Do not proceed beyond a caution sign until the indicated conditions are fully understood and met WARNING No operator serviceable parts inside Refer servicing to qualified personnel To prevent electrical shock do not remove covers WARNING Before this instrument is switched on make su...

Page 5: ...n instrument will execute its programming instructions when properly installed on that instrument Hewlett Packard does not warrant that the operation of the instrument or software or firmware will be uninterrupted or error free LIMITATION OF WARRANTY The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance by Buyer Buyer supplied software or interfacing u...

Page 6: ...ng 43 Sales and Service Offices 46 2 Adjustment Procedures Introduction 50 Safety Considerations 51 Which Adjustments Should Be Performed 51 Test Equipment 51 Adjustable and Factory Selected Components 51 Adjustment Tools 52 Instrument Service Position 52 Using the TAM 57 Test Equipment 57 Adjustment Indicator 57 1 High Voltage Power Supply Adjustment 8560E only 60 Assembly Adjusted 60 Related Per...

Page 7: ... Adjustment 81 Procedure 81 A4 Log Fidelity Adjustment 82 Procedure 82 6 Sampling Oscillator Adjustment 84 Assembly Adjusted 84 Related Performance Test 84 Description 84 Equipment 84 Procedure 84 Sampling Oscillator Adjustment 85 Sampler Match Adjustment 85 7 YTO Adjustment 87 Assembly Adjusted 87 Related Performance Tests 87 Description 87 Equipment 87 Procedure 88 YTO Main Coil Adjustments 88 Y...

Page 8: ... 105 Assembly Adjusted 105 Related Performance Test 105 Description 105 Equipment 106 Procedure 106 14 External Mixer Bias Adjustment 108 Assembly Adjusted 108 Related Performance Test 108 Description 108 Equipment 108 Procedure 109 15 External Mixer Amplitude Adjustment 110 Assembly Adjusted 110 Related Performance Test 110 Description 110 Equipment 111 Procedure 111 16 Signal ID Oscillator Adjus...

Page 9: ...ocedures HP 3335A Source not Available What You ll Find in This Chapter 132 Required Test Equipment 133 4a IF Amplitude Adjustments 134 Assembly Adjusted 134 Related Performance Tests 134 Equipment 134 A4 Log Amp Cal Oscillator Amplitude Adjustment 135 Procedure 136 A5 Reference Attenuator Adjustment 137 A5 Adjustment Verification 137 5a DC Log Amplifier Adjustments 139 Assembly Adjusted 139 Relat...

Page 10: ...A1A1 Keyboard Front Panel Keys 169 Removal 169 Replacement 169 Procedure 4 A1A2 RPG 170 Removal 170 Replacement 170 Procedure 5 A2 A3 A4 and A5 Assemblies 171 Removal 171 Replacement 172 Procedure 6A A6 Power Supply Assembly 8560EC 178 Removal 178 Replacement 180 Procedure 6B A6 Power Supply Assembly 8560E 181 Removal 181 Replacement 182 Procedure 7 A6A1 High Voltage Assembly 8560E only 185 Remova...

Page 11: ...25 Direct Phone Order System 225 Parts List Format 226 Firmware Dependent Part Numbers 227 5 Major Assembly and Cable Locations Introduction 268 6 General Troubleshooting Introduction 282 Assembly Level Text 282 Block Diagrams 282 Assembly Test Points 282 Ribbon Cables 283 Service Cal Data Softkey Menus 288 Troubleshooting to a Functional Section 290 Using the TAM 292 Diagnostic Functions 292 TAM ...

Page 12: ...ection 340 7 ADC Interface Section Introduction 354 Troubleshooting Using the TAM 357 Automatic Fault Isolation 357 Keyboard RPG Problems 360 Keyboard Interface 360 RPG Interface 361 Triggering or Video Gating Problems 363 Preselector Peaking Control Real Time DAC 366 Flatness Control RF Gain DACs 367 A3 Assembly Video Circuits 369 Log Offset Log Expand 371 Video MUX 372 Video Filter 372 Video Fil...

Page 13: ...the Log Amplifier with the TAM 409 Troubleshooting A5 with the TAM 409 Troubleshooting the Cal Oscillator with the TAM 413 Automatic IF Adjustment 415 Parameters Adjusted 416 Requirements 417 Performance Test Failures 419 IF Gain Uncertainty Performance Test 419 Scale Fidelity Performance Test 420 Resolution Bandwidths Performance Tests 420 Log Amplifier Assembly P O A4 421 Log Amplifier 421 Linea...

Page 14: ... Trace Off Screen 478 Intensity 482 Bad Characters or Graticule 483 Long Lines Dimmer than Short Lines 483 Analog Zero Span Problems 8560E only 486 Frequency Count Marker Problems 8560EC 487 Frequency Count Marker Problems 8560E 488 Frequency Counter 8560EC 489 Frequency Counter 8560 491 Video Input Scaling Amplifiers and Limiter 8560EC 493 12 Bit Flash ADC 8560EC 495 32 K Byte Static RAM 8560EC 4...

Page 15: ...rst LO Span Problems All Spans 559 Phase Noise Problems 561 Phase Noise in Locked versus Lock and Roll Spans 561 Reference versus Reference PLL Phase Noise 562 Fractional N versus Offset PLL or YTO PLL Phase Noise 562 Fractional N PLL Phase Noise 08560 60062 and below only 562 Sampler and Sampler IF 563 Sweep Generator Circuit for Spectrum Analyzers with 100 s max Sweep Time 565 Sweep Generator Ci...

Page 16: ... 621 Blank Display 621 Dim Display 622 Troubleshooting using the VGA port 622 Troubleshooting using part substitution 622 CRT Display 8560E 624 Troubleshooting Using the TAM 626 Blank Display Using the TAM 628 Blank Display 629 Blanking Signal 631 Display Distortion 632 Focus Problems 634 Intensity Problems 636 Power Supply 638 Troubleshooting Using the TAM 8560E only 641 A6 Power Supply Assembly ...

Page 17: ...16 Contents ...

Page 18: ...ternal Mixer Amplitude Adjustment Setup 110 Figure 2 22 Signal ID Oscillator Adjustment Setup 115 Figure 2 23 Signal ID Oscillator Adjustment Jumper Location 116 Figure 2 24 10 MHz Reference Adjustment Setup and Adjustment Location 119 Figure 2 25 Tracking Oscillator Adjustment Setup 123 Figure 2 26 16 MHz PLL Adjustment Setup 127 Figure 2 27 16 MHz PLL Adjustment Location 128 Figure 2a 1 IF Ampli...

Page 19: ...ication Rear Frame 8560E 259 Figure 4 7 Parts Identification Chassis 8560EC 261 Figure 4 8 Parts Identification Front Frame 8560EC 263 Figure 4 9 Parts Identification Rear Frame 8560EC 265 Figure 5 1 Hinged Assemblies 270 Figure 5 2 Top View A2 and A3 Unfolded EC Series 271 Figure 5 3 Top View A2 A3 A4 and A5 Unfolded EC Series 272 Figure 5 4 Top View A2 Unfolded E Series 273 Figure 5 5 Top View A...

Page 20: ... Connectors 472 Figure 9 2 Line Generator Output Waveforms 476 Figure 9 3 Blanking Waveforms 477 Figure 9 4 Expanded Blanking Waveforms 478 Figure 9 5 Switch Driver Waveform LCHAR 479 Figure 9 6 Distorted X Y Line Generator Waveforms 481 Figure 9 7 Expanded X Y Line Generator Waveforms 481 Figure 9 8 Normal X Y Line Generator Waveforms 482 Figure 9 9 Delta X Waveform 484 Figure 9 10 Delta Y Wavefo...

Page 21: ...ck Diagram 615 Figure 12 1 Simplified Section Block Diagram 620 Figure 12 2 Probe Power Socket 621 Figure 12 3 Location of 5V supply pins on J1 of A17 and J8 of A2 623 Figure 12 4 Power Supply and CRT Block Diagram 625 Figure 12 5 A17 Test Connector 627 Figure 12 6 Probe Power Socket 629 Figure 12 7 Simplified Power Supply Block Diagram 639 Figure 12 8 Buck Regulator Waveform 643 Figure 12 9 A17 C...

Page 22: ...Assembly See Figure 4 2 8560E and 8560EC 242 Table 4 7 Parts List Main Chassis 8560EC see Figure 4 8 242 Table 4 8 Parts List Main Chassis See Figure 4 3 8560E 243 Table 4 9 Parts List RF Section 8560E and 8560EC see Figure 4 4 245 Table 4 10 Parts List Front Frame 8560EC see Figure 4 9 245 Table 4 11 Parts List Front Frame 8560E see Figure 4 5 246 Table 4 12 Parts List Rear Frame 8560EC see Figur...

Page 23: ... Unlocked Fractional N Troubleshooting Areas 08560 60069 and Above 549 Table 10 13 Unlocked Fractional N Troubleshooting Areas 08560 60062 and below 549 Table 10 14 Divider and Integrator Troubleshooting 553 Table 10 15 Sweep Signal Destination versus Span 555 Table 10 16 Harmonic Mixing Number versus Center Frequency 556 Table 10 17 Settings of Sweep Switches 558 Table 10 18 Settings of Sweep Swi...

Page 24: ...23 1 General Information ...

Page 25: ... 8560EC to the assembly level How to Use this Guide page 25 Differences between HP 8560 EC series and E series Spectrum Analyzers page 26 Instrument Variations page 27 Serial Number and Repair Information page 29 HP 85629B Test and Adjustment Module page 31 Service Kit page 32 Recommended Test Equipment page 33 Electrostatic Discharge page 33 Returning Instrument for Service page 43 ...

Page 26: ...ecifications are Tells you how to test your spectrum analyzer HP 8560 E Series and EC Series User s Guide Tells you how to make measurements with your spectrum analyzer Tells you how to install your spectrum analyzer Tells you how to program your spectrum analyzer HP 8560 E Series and EC Series Spectrum Analyzer Quick Reference Guide Provides an abbreviated version of the HP 8560 E Series and EC S...

Page 27: ... string NOTE Diagrams that illustrate features common to E series and EC series instruments are shown with E series instruments Where there are differences between E series and EC series features separate diagrams are provided for E series and for EC series instruments Features HP 8560 EC Series HP 8560 E Series Display LCD display color display not adjustable backlight bulbs are replaceable repla...

Page 28: ...ndard W14 Cable Assembly W36 Cable Assembly W16 Cable Assembly W42 Cable Assembly W43 Cable Assembly Front panel J3 W46 Cable Assembly W47 Cable Assembly W48 Cable Assembly Rear panel J11 Front panel J6 HP 8560E EC Option 005 W58 Cable Assembly Add Alternate Sweep Output HP 8560E Option 007 Fast ADC A16 Fast ADC Assembly Fast ADC is available as an option for 8560E instruments A3 Interface Assembl...

Page 29: ...Assembly Delete OCXO W50 Cable Assembly A15 RF Assembly Std A21 OCXO HP 8560E EC Option 104 HP 85620A Mass Delete HP 85620A Memory Module HP 8560E EC Option 327 W24 Cable Assembly Delete IF Input W36 Cable Assembly and Video Output Front panel J3 Rear panel J4 Table 1 1 Instrument Variations Option Added Deleted ...

Page 30: ... four numbers and the suffix the last four numbers Figure 1 1 Serial Number Label Example The two letters identify the country in which the unit was manufactured The four numbers of the prefix are a code identifying the date of the last major design change incorporated in your Hewlett Packard product The four digit suffix is a sequential number and coupled with the prefix provides a unique identif...

Page 31: ...arlier Serial Number Label Example It is important that you realize that the new serial number format US00000000 is always considered above the earlier format 0000A00000 when you encounter change information such as serial prefix 3425A and above or serial number 3425A00564 and above ...

Page 32: ...M connects directly to the spectrum analyzer internal data and address bus it controls the spectrum analyzer hardware directly It would be impossible to control the hardware to the same extent either from the spectrum analyzer front panel or over the HP IB The TAM measures voltages at key points in the circuitry and flags a failure whenever the voltage falls outside the limits The TAM locates the ...

Page 33: ...ument Refer to Table 1 2 for a list of items in the service kit Table 1 2 Service Kit Contents Description Quantity HP Part Number Cable Puller 1 5021 6773 PC Board Prop 1 5021 7459 Line Filter Assembly 1 5061 9032 Line Switch Cable 1 5062 0728 Extender Cable 1 5062 0737 BNC to SMB snap on Cable 2 85680 60093 Connector Extractor Tool Kit 1 8710 1791 ...

Page 34: ...ion performance tests adjustments troubleshooting and the Test and Adjustment Module is listed in Table 1 3 on page 34 Other equipment may be substituted if it meets or exceeds the critical specifications listed in the table Refer to the HP 8560 E Series and EC Series Spectrum Analyzer Calibration Guide for the performance tests ...

Page 35: ...ncy resolution 1 Hz Synthesized Frequency range 100 kHz to 2 5 GHz HP 8663A P V signal generator Residual SSB phase noise at 1 GHz 73 dBc Hz at 10 Hz offset 107 dBc Hz at 1 kHz offset 124 dBc Hz at 10 kHz offset 124 dBc Hz at 100 kHz offset Pulse function Frequency range 10 kHz to 50 MHz HP 8116A P A generator Pulse width 200 ns Output amplitude 5 V peak to peak Functions pulse triangle Pulse rise...

Page 36: ...t Receivers Spectrum analyzer Frequency range 300 kHz to 7 GHz HP 8566B P A T for HP 8560E EC Relative amplitude accuracy Option 002 300 kHz to 2 7 GHz 1 8 dB 300 kHz to 7 GHz 4 0 dB Absolute amplitude accuracy 3 9 GHz to 6 9 GHz 2 7 dB Frequency accuracy 10 kHz at 7 GHz Spectrum analyzer Frequency range 300 kHz to 7 GHz HP 8566B A T Amplitude range 70 dBm to 20 dBm Measuring Compatible w power se...

Page 37: ...t diagnostic software HP 8564E HP 9836A C HP 8565E HP 310 320 HP 332 360 Oscilloscope Bandwidth 3 dB dc to 100 MHz HP 54501A P A T Two channels Minimum vertical deflection factor 5 mV div Minimum timebase setting 100 ns Digitizing display with time cursors Delta t cursor accuracy in 500 ns Div 0 1 µs Amplifier Frequency range HP 11975A P HP 8560E EC 2 0 to 2 9 GHz HP 8561E 2 0 to 6 5 GHz HP 8563E ...

Page 38: ... 8721A P bridge Coupling 6 dB nominal Maximum coupling deviation 1 dB nominal Directivity 40 dB minimum Impedance 50 Ω nominal Directional Frequency range 2 0 to 6 5 GHz 0955 0098 P coupler Coupling 16 0 dB nominal Maximum coupling deviation 1 dB nominal Directivity 14 dB minimum Flatness 0 75 dB maximum VSWR 1 45 Insertion loss 1 3 dB 10 dB step Attenuation range 30 dB HP 355D P V attenuator Freq...

Page 39: ...0306 P M V Rejection at 65 MHz 40 dB Rejection at 75 MHz 60 dB Power splitter Frequency range 1 kHz to 12 GHz HP 11667A P A M V Insertion loss 6 dB nominal Output tracking 0 25 dB Equivalent output SWR 1 22 Service accessory kit No substitute 08562 60021 A T Tuning tool No substitute 8710 1010 A Cables Test cable Connectors BNC m to SMB f 85680 60093 A M Length 61 cm 24 in Cable RG 214 U Connector...

Page 40: ...P IB Required w operation verification software HP 10833B P A M eight required Required w HP 85629B test adjustment module Length 2 m 6 6 ft Adapters Adapter Type N f to BNC m 1250 1477 P A Adapter Type N m to BNC f 1250 1476 P A V three required Adapter Type N f to BNC f 1250 1474 P V Adapter Type N m to N m 1250 1475 P Adapter Type N f to APC 3 5 m 1250 1750 A Adapter Type N m to APC 3 5 m 1250 ...

Page 41: ...l banana plug 1251 2816 A T Adapter APC 3 5 f to APC 3 5 f 5061 5311 P M V two required Adapter APC 3 5 m to APC 3 5 m 1250 1748 P V two required Adapter 2 4 mm f to 2 4 mm f HP 11900B P A T V Adapter APC 3 5 f to 2 4 mm f HP 11901B P Adapter APC 3 5 m to 2 4 mm f HP 11901D P Adapter Type N f to 2 4 mm f HP 11903B P A T V Adapter Type N f to 2 4 mm m HP 11903C P Part of microwave workstation P per...

Page 42: ...med on assemblies consisting of electronic components should be done at a static free workstation Figure 1 3 is an example of a static safe workstation using two kinds of ESD protection Conductive table mat and wrist strap combination Conductive floor mat and heel strap combination These methods may be used together or separately Figure 1 3 Example of a Static Safe Workstation ...

Page 43: ...he center in of any connector and before removing any assembly from the unit Be sure all instruments are properly earth grounded to prevent build up of static discharge Static Safe Accessories Table 1 4 Static Safe Accessories HP Part Number Description 9300 0797 Set includes 3M static control mat 0 6 m 1 2 m 2 ft 4 ft and 4 6 cm 15 ft ground wire The wrist strap and wrist strap cord are not inclu...

Page 44: ...s are unavailable identical packaging materials may be acquired through any Hewlett Packard Sales and Service Office Descriptions of the packaging materials are listed in Figure 1 4 on page 45 Other Packaging CAUTION Spectrum analyzer damage can result from using packaging materials other than those specified Never use styrene pellets in any shape as packaging materials They do not adequately cush...

Page 45: ...hes of packing material or enough to prevent the equipment from moving in the carton If packing foam is unavailable the best alternative is SD 240 Air Cap from Sealed Air Corporation Commerce CA 90001 Air Cap looks like a plastic sheet covered with 1 1 4 inch air filled bubbles Use the pink colored Air Cap to reduce static electricity Wrap the equipment several times in this material to both prote...

Page 46: ...turning Instruments for Service Figure 1 4 HP 8560E EC Shipping Container and Cushioning Materials Table 1 5 Static Safe Accessories Item Description HP Part Number 1 9211 5636 Outer Carton 2 08590 80013 Pads 2 3 08590 80014 Bottom Tray ...

Page 47: ...eplacement parts contact the nearest Hewlett Packard Sales and Service Office listed in Table 1 6 on page 47 In any correspondence be sure to include the pertinent information about model numbers serial numbers and assembly part numbers NOTE Within the USA a toll free phone number is available for ordering replacement parts Refer to the section entitled Ordering Information in Chapter 4 Replaceabl...

Page 48: ... Wokingham Berkshire RG41 5DZ England 44 118 9696622 INTERCON FIELD OPERATIONS Headquarters Hewlett Packard Company 3495 Deer Creek Rd Palo Alto CA 94304 1316 USA 415 857 5027 Japan Hewlett Packard Japan Ltd 9 1 Takakura Cho Hachioji Tokyo 192 Japan 81 426 60 2111 Australia Hewlett Packard Australia Ltd 31 41 Joseph Street Blackburn Victoria 3130 61 3 895 2895 Singapore Hewlett Packard Singapore P...

Page 49: ...48 Chapter1 General Information Sales and Service Offices ...

Page 50: ...49 2 Adjustment Procedures ...

Page 51: ...nt 8560E page 60 2 Display Adjustment 8560E page 63 3 IF Bandpass Adjustment page 70 4 IF Amplitude Adjustments page 75 5 DC Log Amplifier Adjustments page 80 6 Sampling Oscillator Adjustment page 84 7 YTO Adjustment page 87 8 First LO Distribution Amplifier Adjustment page 91 9 Tracking Generator Power Level Adjustments 002 page 94 10 Frequency Response Adjustment page 97 11 Calibrator Amplitude ...

Page 52: ...the instrument may still be charged even if the instrument has been disconnected from its source of supply WARNING Use a nonmetallic adjustment tool whenever possible Which Adjustments Should Be Performed Table 2 1 on page 52 lists the manual adjustments that should be performed when an assembly is repaired or changed It is important to perform the adjustments in the order indicated to ensure that...

Page 53: ...uctors Required service accessories with part numbers are listed under Service Kit in Chapter 1 Instrument Service Position Refer to Chapter 3 for information on removing the spectrum analyzer cover assembly and accessing all internal assemblies Table 2 1 Related Adjustments Assembly Changed or Repaired Perform the Following Related Adjustments in the Order Listed Adjustment Number A1A1 Keyboard N...

Page 54: ...Analyzer Calibration Guide The adjustment must be performed if the performance test fails A10 Tracking Generator Tracking Generator Power Level Adjustment 9 Frequency Response Adjustment 10 A11 YTO YTO Adjustment 7 Frequency Response Adjustment or perform the Frequency Response Performance Test in the 10 HP 8560 E Series and EC Series Spectrum Analyzer Calibration Guide The adjustment must be perf...

Page 55: ...lay A2R263 START BLANK 2 Adjusts the blanking at the start of a vector on the display A2R268 VIDEO GAIN 2 Adjusts the vertical gain in fast analog zero span to match with the digital zero span input A2R271 SWEEP GAIN 2 Adjusts the end of the trace to the rightmost vertical graticule line in fast analog zero span mode A4C707 FM DEMOD 13 Adjusts the FM demodulation for a peak response A4R445 LIMITER...

Page 56: ...scillator A14R42 6 01 GHz 7 Adjusts the main coil tune driver current at a YTO frequency of 6 01 GHz near the upper YTO frequency limit A14R76 FM SPAN 7 Adjusts the FM span accuracy by affecting the sensitivity of the FM coil driver A14R93 3 2 GHz 7 Adjusts the main coil fixed driver current at a YTO frequency of 3 2 GHz near the lower YTO frequency limit A15C100 SMPL MATCH 1 6 Transforms the samp...

Page 57: ...ble 2 3 Factory Selected Components Reference Designator Adjustment Number Basis of Selection A5C204 3 Selected to optimize center frequency of LC tank that loads the crystal A5C216 3 Selected to optimize center frequency of LC tank that loads the crystal A5C326 3 Selected to optimize LC pole center frequency A5C327 3 Selected to optimize LC pole center frequency A5C505 3 Selected to optimize cent...

Page 58: ...els must be used Substitutions may be made for recommended models Substitute sources must operate over the frequency ranges indicated Recommended substitutes are listed in the Configuration Menu If you must substitute the source with a user defined model the adjustments run faster using a synthesized source rather than an unsynthesized source NOTE When connecting signals from the HP 8340A B or any...

Page 59: ...illator Adjustment 6 8 YTO YTO Adjustment 7 9 LO Distribution Amp First LO Distribution Amplifier Adjustment 8 10 Low Band Flatness Frequency Response Adjustment 10 11 Calibrator Amplitude Calibrator Amplitude Adjustment 11 12 10 MHz Reference Oscillator 10 MHz Reference Adjustment TCXO 12 Option 103 13 External Mixer Bias External Mixer Bias Adjustment 14 14 External Mixer Amplitude External Mixe...

Page 60: ...ower Meter HP 8902A HP 436A HP438A Power Sensor HP 8482A HP 8481A 10 MHz to 2 9 GHz Power Splitter HP 11667B 10 MHz to 2 9 GHz 11 Calibrator Amplitude Power Meter HP 8902A HP 436A HP 438A Power Sensor HP 8482A HP 8481A 12 10 MHz Reference Frequency Counter HP 5342A HP 5343A Oscillator 9 to 11 MHz 13 External Mixer Bias Manual Probe Cable 14 External Mixer Amplitude Power Meter HP 8902A HP 436A HP ...

Page 61: ...tage is set to 6 0 V rms when the 110 Vdc nominal supply is set to the voltage marked on the HV module WARNING To minimize shock hazard use a nonmetallic adjustment tool when adjusting the A6 power supply WARNING The following procedure probes voltages that if contacted could cause personal injury or death NOTE Adjustment of the high voltage power supply should not be a routine maintenance procedu...

Page 62: ...the spectrum analyzer cover Fold down the A2 controller A3 interface A4 log amplifier and A5 IF assemblies Remove the A6 power supply cover 2 Position the HP 8560E EC as shown in Figure 2 1 Connect the negative DVM lead to A6TP401 and the positive DVM lead to A6TP405 place the positive DVM lead on the inductor L401 lead which is adjacent to the label that reads U401 a white square outlines the are...

Page 63: ...6 Adjust A6R410 HV ADJ for a voltage equal to the voltage recorded in step 5 7 Press LINE to turn the spectrum analyzer off and disconnect the power cord Wait at least 30 seconds for the high voltage power supply capacitors to discharge 8 Disconnect the DVM test leads from A6TP401 and A6TP405 Reinstall the power supply cover ...

Page 64: ...s is done using the CRT adjust pattern Fine adjustments use the graticule The fast zero span amplitude adjustments correct for differences between analog and digital display modes The displayed sweep time accuracy is adjusted in fast zero span sweep adjustments for non Option 007 spectrum analyzers Figure 2 2 Display Adjustment Setup Equipment 10 dB VHF step attenuator routines HP355D Photometer r...

Page 65: ...up for at least 3 minutes Adjust A17R11 CUTOFF until the display is visible and A17R34 COARSE FOCUS for best possible focus Cutoff Adjustment 6 Press PRESET DISPLAY INTENSITY 255 ENTER STORE INTENSITY MORE 1 of 2 FOCUS 127 ENTER STORE FOCUS then GRAT OFF Adjust A17R11 CUTOFF until the line between the bottom of trace A and the annunciators at the bottom of the display just disappears Deflection Ad...

Page 66: ...bezel 14 Adjust the rear panel Y POSN and A17R75 Y GAIN until the softkey labels align with their appropriate softkeys 15 Press PRESET If necessary readjust STOP BLANK and START BLANK for the best looking intersection of the graticule lines This will be most noticeable along the center vertical and horizontal graticule lines Intensity Adjustments 16 Press AMPLITUDE then set the REF LVL to 70 dB an...

Page 67: ...66 Chapter2 Adjustment Procedures 2 Display Adjustment 8560E only Figure 2 3 CRT Adjust Pattern ...

Page 68: ...E FOCUS and A17R92 DDD for the best focus of the characters at the center of the screen 19 Adjust A17R21 Z FOCUS for the best focus of the outside box of the test pattern 20 Adjust A17R26 X FOCUS for best focus of the characters at the corners of the test pattern 21 Repeat steps 17 through 20 to obtain the best overall focus quality ...

Page 69: ... Press MKR MKR and MARKER REF LVL If the marker is not at the top graticule press MARKER REF LVL again 26 Press SAVE SAVE STATE and STATE 0 27 Set the sweep time to 10 ms 28 Press SAVE SAVE STATE and STATE 1 29 Adjust A2R209 SWEEP OFFSET to place the beginning of the trace at the leftmost vertical graticule line 30 Adjust A2R271 SWEEP GAIN to place the end of the trace at the tenth vertical gratic...

Page 70: ... start of sweep is aligned to the leftmost vertical graticule line and the stop sweep is aligned with the right most vertical graticule line 37 Press STATE 2 and STATE 3 The two traces should be aligned within 0 1 divisions 38 Press STATE 0 and STATE 1 The two traces should be aligned within 0 1 divisions ...

Page 71: ...he inductors and transformers are for coarse tuning and the varactors are for fine tuning by the microprocessor The inductors and transformers are adjusted such that the varactor diodes are biased near the middle of their capacitance range The varactor diode bias is measured with the DVM NOTE This procedure is not a routine adjustment It should be performed only if repairs to the A5 IF assembly ar...

Page 72: ...P 8560E EC press ADJ CURR IF STATE Wait for the IF ADJUST STATUS message to disappear before continuing with the next step 5 Read the voltage on A5TP5 this is an empty hole type of test point If the voltage is less than 6 06 Vdc turn A5L300 LC CTR 1 clockwise If the voltage is greater than 6 26 Vdc turn LC CTR 1 counterclockwise 6 Repeat steps 4 and 5 until the voltage reads 6 16 Vdc 100 mV NOTE I...

Page 73: ... LC CTR 1 A5C326 A5L301 LC CTR 2 A5C327 A5L700 LC CTR 3 A5C717 A5L702 LC CTR 4 A5C718 Table 2 7 LC Factory Selected Capacitor Selection DVM Reading V Currently Loaded Capacitor Value pF Replace Replace Replace Replace Replace Replace Replace 6 8 with 8 2 with 10 with 12 with 15 with 18 with 20 with 0 to 1 5 1 5 to 2 5 18 18 2 5 to 3 5 15 15 18 18 3 5 to 4 5 10 12 15 15 18 4 5 to 5 5 8 2 10 12 15 1...

Page 74: ... the correct replacement value center the XTAL CTR adjustment and press ADJ CURR IF STATE After the IF ADJUST STATUS message disappears read the DVM display Choose a capacitor value from Table 2 10 on page 74 based on the DVM reading and the presently loaded capacitor value Table 2 10 on page 74 lists a few capacitor part numbers CAUTION Press LINE to turn the spectrum analyzer off before removing...

Page 75: ...24 27 27 4 5 to 5 5 18 20 22 24 27 5 5 to 6 5 no change no change no change no change no change no change 6 5 to 7 5 no change no change no change no change no change no change 7 5 to 8 5 15 18 18 22 24 8 5 to 9 5 15 15 18 20 24 9 5 to 10 15 18 20 24 Indicates a condition that should not exist suspect broken hardware Table 2 10 Capacitor Part Numbers Capacitor Value pF HP Part Number 6 8 0160 4793...

Page 76: ...tude adjustment and the Reference 15 dB Attenuator adjustment Assembly Adjusted A4 log amp cal oscillator A5 IF assembly Related Performance Tests IF Gain Uncertainty Scale Fidelity Equipment Frequency synthesizer HP3335A Adapters Type N m to BNC f 1250 1476 Cables BNC 122 cm 48 in HP10503A Test cable 85680 60093 Figure 2 6 IF Amplitude Adjustment Setup ...

Page 77: ...this adjustment is visible only after the ADJ CURR IF STATE sequence is complete ADJ CURR IF STATE causes the IF gain adjustment to use the new output amplitude from the cal oscillator When the adjustment sequence is complete the result of the adjustment should cause the 35 dBm signal at A5J5 to be displayed at 60 dBm This procedure also sets the attenuator of the reference 15 dB attenuator so tha...

Page 78: ...FF 5 Set the HP 3335A controls as follows Frequency 10 7 MHz Amplitude 55 dBm 6 Note the marker value Ideally it should read 60 dBm 0 1 dB 7 If the marker reads less than 60 1 dBm rotate A4R826 CAL OSC AMPTD one third turn counter clockwise for every 0 1 dB less than 60 dBm See Figure 2 7 on page 76 for the location of A4R826 8 If the marker reads greater than 59 9 dBm rotate A4R826 CAL OSC AMPTD ...

Page 79: ...dB ATTEN one half turn counterclockwise for each 0 1 dB less than 50 00 dB If the MKR amplitude is greater than 50 1 dB rotate A5R343 one half turn clockwise for each 0 1 dB greater than 50 00 dB Do not adjust A5R343 more than five turns before continuing with the next step 9 On the HP 8560E EC press ADJ CURR IF STATE Note the MKR amplitude reading 10 Set the HP 8560E EC reference level to 60 dBm ...

Page 80: ...ows Center frequency 300 MHz Span 0 Hz Reference level 10 dBm Resolution BW 300 kHz 7 Connect a BNC cable between the HP 8560E EC CAL OUTPUT and INPUT 50Ω 8 On the HP 8560E EC press MKR CAL and REF LVL ADJ 9 Use the knob or step keys to adjust the REF LEVEL CAL setting until the MKR reads 10 00 dBm 0 1 dB 10 On the HP 8560E EC press STORE REF LVL ...

Page 81: ...locks D F H K IF Gain Accuracy RBW switching or Log Fidelity If multiple adjustments are required they should be done in the following order 1 Limiter Phase 2 Linear Fidelity 3 Log Fidelity All adjustments should be made with all of the shields on and only after allowing at least a 20 minute warmup Assembly Adjusted A4 log amplifier Related Performance Tests IF Gain Uncertainty Scale Fidelity Equi...

Page 82: ...STATE wait for the spectrum analyzer to complete adjustments then press MKR 6 Adjust A4R445 for maximum on screen amplitude Refer to Figure 2 7 on page 76 for the location of A4R445 A4 Linear Fidelity Adjustment This adjustment consists of adjusting A4R544 until the delta marker reads 40 dB under the following conditions Procedure 1 Press LINE to turn the spectrum analyzer off Remove the spectrum ...

Page 83: ...for an even higher level signal and press CAL and ADJ CURR IF STATE Allow sufficient time for the spectrum analyzer to complete the adjustment 10 Repeat the adjustment and adjust current state until the delta marker reads 40 dB 2 dB A4 Log Fidelity Adjustment This adjustment consists of adjusting A4R531 until the error is adjusted to zero Procedure 1 Press LINE to turn the spectrum analyzer off Re...

Page 84: ...crease the source power to 26 dBm 7 Calculate the error The error Delta Marker reading 16 in dB 8 Set the source power to 10 dBm 9 Adjust A4R531 see Figure 2 7 on page 76 to read 2 times the error press CAL and ADJ CURR IF STATE 10 Repeat to check Readjust as necessary to get error adjusted to zero ...

Page 85: ...the tuning voltage divided by 4 05 The setting is then checked at other frequencies for the full tuning range of the sampling oscillator Figure 2 8 Sampler Adjustment Setup Equipment Digital voltmeter HP 3456A DVM test leads HP 34118A Procedure 1 Press LINE to turn the spectrum analyzer off and disconnect the line power cord Remove the spectrum analyzer cover and fold down the A15 RF and A14 frequ...

Page 86: ...ations Sampler Match Adjustment 1 Connect the negative DVM test lead to A15J400 pin 6 and the positive DVM test lead to A15J400 pin 1 2 Press FREQUENCY and set the HP 8560E EC center frequency to 2302 3 MHz This sets the sampling oscillator to 291 667 MHz 3 Adjust A15C100 SMPL MATCH to peak the voltage displayed on the DVM 4 Record the displayed voltage in Table 2 11 on page 86 as the displayed vo...

Page 87: ...layed voltage to 0 8 0 1 Vdc 9 Set the HP 8560E EC center frequency to 2302 3 MHz and repeat steps 9 through 13 10 Move the positive DVM test lead to A15J400 pin 3 Check that the measured voltage is the negative of the voltage at pin 1 within 0 1 Vdc 11 Disconnect the DVM probes from A15J400 Table 2 11 Sampling Adjustments Center Frequency MHz Sampling Oscillator MHz Displayed Voltage Vdc 1st Tria...

Page 88: ...ock loops disabled The YTO endpoints are adjusted to bring these points within the capture range of the main loop The YTO FM coil is adjusted to place the 300 MHz CAL OUTPUT signal at the center vertical graticule in a 20 MHz span Figure 2 10 YTO Adjustment Setup Equipment Microwave frequency counter HP 5343A Option 001 Adapters Type N m to BNC f 1250 1476 Type N f to APC 3 5 f Option 026 only 125...

Page 89: ...ns 1 and 2 jumpered to the TEST position pins 2 and 3 jumpered 4 If the HP 8560E EC spectrum analyzer does not have Option 002 press the following keys CONFIG EXT MXR PRE UNPR UNPR AUX CTRL EXTERNAL MIXER LOCK HARMONIC 6 Hz SPAN ZERO SPAN FREQUENCY CENTER FREQ 18 8893 GHz SGL SWP SAVE SAVE STATE STATE 0 FREQUENCY 35 7493 GHz SAVE SAVE STATE STATE 1 RECALL RECALL STATE STATE 0 5 If the HP 8560E EC ...

Page 90: ...TATE 1 9 Adjust A14R42 6 01 GHz for a frequency counter reading of 6 010 GHz 1 MHz 10 On the HP 8560E EC press STATE 0 11 Repeat steps 6 through 9 until both of these interacting adjustments meet their tolerances 12 Place the jumper on A14J23 in the NORM position pins 1 and 2 jumpered 13 Disconnect the SMA cable from the 1ST LO OUTPUT jack and reconnect the 50 Ω termination on the 1ST LO OUTPUT ...

Page 91: ... YTO Adjustment Locations YTO FM Coil Adjustments 1 On the HP 8560E EC press PRESET and set the controls as follows Center frequency 300 MHz Span 20 MHz 2 Adjust A14R76 FM SPAN until the 300 MHz CAL OUTPUT SIGNAL is aligned with the center vertical graticule line ...

Page 92: ...l assembly Related Performance Test First LO OUTPUT Amplitude Description The gate bias and SENSE voltages for the A7 switched LO distribution amplifier is adjusted to the value specified on the label of A7 Figure 2 12 First LO Distribution Amplifier Adjustment Setup Equipment Measuring receiver HP 8902A DVM HP 3456A Power sensor HP 8485A DVM test leads HP 34118A ...

Page 93: ... LO power to a low level 7 To set the gate bias connect the positive lead of the DVM to A14J18 pin 15 and the negative lead to A14J18 pin 6 See Figure 2 13 on page 92 for a pin location drawing Figure 2 13 TAM Connector Pin Locations 8 On the HP 8560E EC press LO GATE LEVEL 9 Note the Gate Bias voltage printed on the A7 LO distribution amp label Use the knob or keypad to change the displayed DAC v...

Page 94: ...________________ 14 Set the Sense EXT value by pressing EXT LO LEVEL 15 Use the knob or keypad to enter the DAC value for 1 45 GHz from the band 0 sense voltage adjustment above 16 Save the adjustment values by pressing PREV MENU STORE DATA and YES 17 Move the jumper on A2J12 from WR ENA back to the WR PROT position ...

Page 95: ...the 10 dBm and 0 dBm TRK GEN RF POWER settings When installing a replacement tracking generator it should only be necessary to adjust 10 dB ADJ the offset adjustment to account for variations in cable loss from the tracking generator to the RF OUT 50Ω connector This adjustment is done at a 0 dBm TRK GEN RF POWER setting This ensures that the absolute power level with a 0 dBm TRK GEN RF POWER setti...

Page 96: ...yzer cover and place the spectrum analyzer in the service position as illustrated in Figure 2 14 on page 95 Figure 2 14 Tracking Generator Power Setup and Adjustment Locations 2 Connect the Type N cable between the RF OUT 50Ω and RF INPUT 50Ω connectors on the HP 8560E EC 3 Press PRESET on the HP 8560E EC and set the controls as follows Center frequency 300 MHz Span 0 Hz ...

Page 97: ... RF POWER to 10 dBm Note the power displayed on the measuring receiver 11 Proceed with steps 12 through 14 only if the power level noted in the previous step was outside the range of 10 dBm 0 23 dB 12 With the TRK GEN RF POWER set to 10 dBm adjust A10R13 10 dB ADJ for a 10 dBm 0 1 dB reading on the measuring receiver Refer to Figure 2 14 on page 95 for adjustment location 13 Set the TRK GEN RF POW...

Page 98: ...analyzer at several different frequencies At each frequency the DAC controlling the flatness compensation amplifiers is adjusted to place the peak of the displayed signal at the same place on the screen With firmware revisions greater than 920528 there are correction points at 2 MHz and 6 MHz These points are outside frequency range of the synthesized sweeper The DAC values for these two points ar...

Page 99: ...ustment Setup Equipment Synthesized sweeper HP 8340A B Measuring receiver HP 8902A Power sensor HP 8482A Power splitter HP 11667A Adapters Type N m to Type N m 1250 1475 Type N m to APC 3 5 f 1250 1744 Type APC 3 5 f to APC 3 5 f 5061 5311 Cables BNC 122 cm 48 in HP 10503A APC 3 5 91 cm 36 in 8120 4921 ...

Page 100: ...ution BW 300kHz Log division 2 dB 5 Press INSTR PRESET on the HP 8340A B and set the controls as follows CW 10MHz Power level 4 dBm 6 Set ref level cal DAC to zero Press CAL REF LVL ADJ and use the knob to set the value to 0 Press STORE REF LVL 7 On the HP 8560E EC press MKR CAL MORE 1 OF 2 SERVICE CAL DATA then FLATNESS The current value of the RF Gain DAC should be displayed in the active functi...

Page 101: ...d the RF gain DAC value at 10 MHz 10 MHz RF gain DAC value ______________________ 15 Add 67 to the 10 MHz RF gain DAC value and record as the 2 MHz RF gain DAC value 2 MHz RF gain DAC value _______________________ 16 Add 62 to the 10 MHz RF gain DAC value and record as the 6 MHz RF gain DAC value 6 MHz RF gain DAC value ________________________ 17 Press until 2 MHz is displayed in the active funct...

Page 102: ...ly Related Performance Test Calibrator Amplitude and Frequency Accuracy Description The CAL OUTPUT amplitude is adjusted for 10 00 dBm measured directly at the front panel CAL OUTPUT connector Figure 2 16 Calibrator Amplitude Adjustment Setup Equipment Measuring receiver HP 8902A Power sensor HP 8482A Adapters Type N f to BNC m 1250 1477 ...

Page 103: ...service position shown in Figure 2 16 on page 101 Prop the A14 Frequency Control Board assembly in the service position 2 Zero and calibrate the HP 8902A HP 8482A combination in log display mode Enter the power sensor 300 MHz Cal Factor into the HP 8902A 3 Connect the HP 8482A through an adapter directly to the HP 8560E EC CAL OUTPUT connector 4 Adjust A15R561 CAL AMPTD for a 10 00 dBm reading on ...

Page 104: ...Performance Test 10 MHz Reference Output Accuracy Description The frequency counter is connected to the CAL OUTPUT which is locked to the 10 MHz reference This yields better effective resolution The temperature compensated crystal oscillator TCXO is adjusted for a frequency of 300 MHz as read by the frequency counter Figure 2 17 10 MHz Frequency Reference Adjustment Setup ...

Page 105: ...p the A14 Frequency Control Assembly 2 Set the HP 5343A controls as follows SAMPLE RATE Midrange 50 Ω 1 MΩ SWITCH 50 Ω 10 Hz 500 MHz 500 MHz 26 5 GHz SWITCH 10 Hz 500 MHz 3 Press AUX CTRL REAR PANEL and ensure that the 10 MHz reference is set to 10 MHz INT NOTE When the 10 MHz reference is set to 10 MHz EXT the TCXO is not operating and warmed up If the reference is set to 10 MHz EXT set the refer...

Page 106: ...ly Related Performance Test There is no related performance test for this adjustment procedure Description A 5 kHz peak deviation FM signal is applied to the INPUT 50Ω The detected audio is monitored by an oscilloscope FM DEMOD is adjusted to peak the response displayed on the oscilloscope Figure 2 18 Demodulator Adjustment Setup ...

Page 107: ...input to probe A4C723 the end closest to A4U707 as in Figure 2 19 on page 107 Press LINE to turn the spectrum analyzer on Connect the HP 8640B RF OUTPUT to the HP 8560E EC INPUT 50Ω 3 Set the HP 8640B controls as follows Range MHz 61 to 128 Frequency 100 000 MHz Output level 10dBm RF ON AM OFF FM INT Modulation frequency 1000Hz Peak deviation 5 kHz Scale FM k MHz 4 Adjust the HP 8640B FM deviation...

Page 108: ... OFF TRIG and SWEEP CONT SGL SGL Set the volume control to midrange 8 Set the HP 8640B FM to INT 9 A 1 kHz sine wave should be observed on the oscilloscope Rotate the volume knob on the front panel of the spectrum analyzer until the amplitude of the 1 kHz signal is at about 150 mV 3 divisions on the oscilloscope 10 Adjust A4C707 FM DEMOD for a maximum peak to peak response on the oscilloscope 11 P...

Page 109: ...There is no related performance test for this adjustment procedure Description A voltmeter is connected to the HP 8560E EC IF INPUT with the external mixer bias set to off The bias is adjusted for a 0 Vdc output Figure 2 20 External Mixer Bias Adjustment Setup Equipment DVM HP 3456A Adapters Type BNC f to SMA m 1250 1200 Type BNC f to dual banana plug 1251 2816 Cables BNC 122 cm 48 in HP 10503A ...

Page 110: ...analyzer cover and connect the equipment as illustrated in Figure 2 20 on page 108 Reconnect the power cord and press LINE to turn the spectrum analyzer on 2 Set the HP 3456A controls as follows Function DC VOLTS Range 0 1 V Resolution 100 mV 3 On the HP 8560E EC press AUX CTRL EXTERNAL MIXER BIAS then BIAS OFF 4 Adjust A15R926 EXT BIAS ZERO for a DVM reading of 0 000 Vdc 12 5 mV ...

Page 111: ...sion losses for K band are recorded and reset to 30 dB A 310 7 MHz signal is applied to the power sensor and the power level of the source is adjusted for a 30 dBm reading The signal is then applied to the IF INPUT The flatness compensation amplifiers are then adjusted via DACs to place the displayed signal at the reference level Only the determination of the Flatness Compensation Amplifier slope ...

Page 112: ...the WR ENA position The jumper is on the edge of the A2 controller assembly and can be moved without folding the board down Press LINE to turn the spectrum analyzer on 4 On the HP 8560E EC press AUX CTRL EXTERNAL MIXER AMPTD CORRECT then CNV LOSS VS FREQ 5 On the HP 8560E EC press CAL MORE 1 OF 2 SERVICE CAL DATA 3RD IF AMP and CAL 3RD AMP GAIN Wait until the message ADJUSTMENT DONE appears in the...

Page 113: ...ady connected to the HP 8902A RF power connector Zero and calibrate the HP 8902A power sensor combination in log mode Enter the power sensor 50 MHz Cal Factor into the HP 8902A Connect the power sensor through an adapter to the SMA cable 10 Adjust the HP 8340A POWER LEVEL until the power displayed on the HP 8902A reads 30 dBm 0 05 dB 11 Disconnect the SMA cable from the power sensor adapter and co...

Page 114: ...er on the A2 Controller assembly in the WR PROT position NOTE The following steps should only be performed if you need to replace the 30 dB conversion loss values with those recorded in Table 2 12 on page 112 16 Press AUX CTRL EXTERNAL MIXER AMPTD CORRECT then CNV LOSS VS FREQ on the HP 8560E EC 17 Press or to select frequencies where the conversion loss value was recorded in Table 2 12 on page 11...

Page 115: ...y 08563 60083 or earlier serial prefix 3517A and below Later A15 RF assemblies have no 298 MHz adjustment This procedure is required for spectrum analyzers with a serial prefix less than 3310A standard and all options or from 3310A through 3517A with Option 008 installed The frequency range of the 298 MHz signal ID oscillator is determined by counting the 10 7 MHz IF as A15C629 is rotated through ...

Page 116: ... and below Figure 2 22 Signal ID Oscillator Adjustment Setup Equipment Microwave frequency counter HP 5343A Spectrum analyzer HP 8566A B Adapters Type N m to BNC f 2 required 1250 1476 BNC tee f m f 1250 0781 Cables Test cable BNC m to SMB f 85680 60093 BNC 122 cm 48 in 2 required HP 10503A ...

Page 117: ...Hz IF out and connect the SMB end of the test cable to A15J601 Connect the rest of the equipment as shown in Figure 2 22 on page 115 3 Remove the four screws holding the brace on the A15 RF assembly near J2 4 Connect a jumper between the leads of A15R914 and A15C904 the ends near U908 See Figure 2 23 on page 116 for the location of the components 5 Reconnect the power cord and press LINE to turn t...

Page 118: ...not 10 7 MHz 11 While observing the HP 8566A B display adjust A15C629 SIG ID for the highest obtainable frequency with less than 3 dB decrease in amplitude from maximum Read this frequency from the frequency counter and record as F3 dB HIGH F3 dB HIGH _________________________MHz 12 Observe the HP 8566A B display as you adjust A15C629 SIG ID for the lowest obtainable frequency with less than 3 dB ...

Page 119: ...z Reference Accuracy Description The frequency of the internal 10 MHz frequency reference is compared to a known frequency standard and adjusted for minimum frequency error This procedure does not adjust the short term stability or long term stability of the A21 10 MHz ovenized crystal oscillator OCXO Stability is determined by the characteristics of the particular oscillator and the environmental...

Page 120: ...ent Location Equipment Frequency counter HP 5334A B Frequency standard HP 5061B Cesium Beam Standard or any 10 MHz frequency standard with accuracy 1 X 10 10 Cable BNC 122 cm 2 required HP 10503A Procedure NOTE Failure to allow a 24 hour minimum warmup time for OCXO frequency and temperature stabilization may result in oscillator misadjustment ...

Page 121: ...connector and INPUT A on the frequency counter 2 Set the frequency counter controls as follows Function data freqA Input A 10 Attenuator OFF AC OFF DC coupled 50Ω OFF 1 MΩ input impedance Auto trigger ON 100 kHz filter A OFF INT EXT switch rear panel EXT 3 Select a 1 second gate time on the HP 5334A B frequency counter by pressing GATE TIME 1 and GATE TIME 4 To offset the displayed frequency by 10...

Page 122: ...e between the frequency of the INPUT A signal and 10 0 MHz with a resolution of 0 001 Hz 1 MHz 9 Wait at least two gate periods for the frequency counter to stabilize then adjust the FREQ ADJ control on A21 OCXO for a stable frequency counter reading of 0 000 Hz 0 010 Hz 10 Replace the dust cap screw to A21 OCXO ...

Page 123: ...ncy of the tracking oscillator range may drift outside of acceptable limits This adjustment should only be performed if there is insufficient tracking adjustment range This adjustment recenters the tracking oscillator range The A10 tracking generator is partially removed from the spectrum analyzer to perform this adjustment A synthesized sweeper is used as the first local oscillator signal A frequ...

Page 124: ...10 tracking generator positioned next to the HP 8560E EC reconnect W14 10 wire ribbon cable to A10J1 Reconnect W48 to A10J8 Connect the 50 Ω termination to A10J3 2 Connect the equipment as shown in Figure 2 25 on page 123 The frequency counter provides the frequency reference for the synthesized sweeper and the HP 8560E EC Figure 2 25 Tracking Oscillator Adjustment Setup ...

Page 125: ... adjustment 7 On the HP 8560E EC press AUX CTRL TRACKING GENRATOR MORE 1 OF 3 MAN TRK ADJ 0 and Hz Rotate the knob counterclockwise until FINE TRACK ADJ is set to 0 8 Record the frequency counter reading in Table 2 13 on page 125 as F1 9 On the HP 8560E EC press MAN TRK ADJ 255 and Hz Rotate the knob clockwise until the FINE TRACK ADJ is set to 255 10 Record the frequency counter reading in Table ...

Page 126: ... steps 7 through 14 at least once more until no further adjustment of A10C3 TRK OSC CTR is necessary 16 Press LINE to turn the spectrum analyzer off Replace the dust cap screw on A10 Disconnect all cables from A10 17 Reinstall A10 in the HP 8560E EC Table 2 13 Tracking Oscillator Range Centering N F1 MHz F2 MHz Fcenter MHz TRACK ADJ DAC Settings COARSE FINE 1 2 3 4 5 ...

Page 127: ...t Sweep Time Accuracy Option 007 Description In spectrum analyzers with serial prefix numbers greater than or equal to 3310A the 16MHz CPU clock is phase locked to the 10 MHz reference The output of the 16 MHz PLL loop integrator is adjusted for a clock frequency of approximately 14 4 MHz with the loop unlocked This ensures that the CPU will still function and the display annotation will be distor...

Page 128: ...nalyzer off Remove the spectrum analyzer cover and fold out the A2 controller and A3 interface assemblies Use a pc board prop to hold up the A3 interface assembly as shown in Figure 2 26 on page 127 2 Connect the equipment as shown if Figure 2 26 on page 127 The 10 1 probe ground lead connects to A2TP10 and the probe tip connects to A2TP101 3 The 16 MHz PLL adjustment location is shown in Figure 2...

Page 129: ... spectrum analyzer on Wait until the spectrum analyzer power on adjustments have completed 5 Set the microwave frequency counter as follows Sample rate Fully counterclockwise 10 Hz 500 MHz 500 MHz 26 5 GHz Switch 10 Hz 500 MHz 50 Ω 1 MΩ Switch 1 MΩ 6 On the HP 8560E EC spectrum analyzer press AUX CTRL REAR PANEL and 10 MHz EXT ...

Page 130: ...ror messages 8 Adjust A2R152 16 MHz PLL ADJ until the microwave frequency counter reads 14 4 MHz 200 kHz 9 Reconnect W22 to A2J8 The microwave frequency counter should read 16 MHz If the counter reads 16 MHz and the display is still distorted perform the display adjustments in Display Adjustment in this chapter 10 On the spectrum analyzer press CAL and REALIGN LO and IF to clear any error messages...

Page 131: ...nalyzer cover Fold down the A15 RF and A14 frequency control assemblies Prop up the A14 frequency control assembly 2 Disconnect W33 gray brown coax cable from A15J701 3 Connect the signal at A15J701 to the input of the HP 8566A B spectrum analyzer 4 Reconnect the power cord and press LINE to turn the spectrum analyzer on 5 Set the center frequency of the HP 8566A B to 600 MHz and set the frequency...

Page 132: ...131 2a Adjustment Procedures HP 3335A Source not Available ...

Page 133: ... for the adjustment of the spectrum analyzer that do not require the use of the HP 3335A Synthesizer Level Generator The HP 3335A has been obsoleted Because of the unavailability of the HP 3335A new adjustment procedures are required that use different signal sources If the HP 3335A is not available substitute these procedures for those of the same number found in Chapter 2 ...

Page 134: ...ecifications for Equipment Substitution Recommended Model Sources Synthesized Signal Generator Frequency range 250 kHz to 3 GHz Frequency resolution 1 Hz Attenuator resolution 0 02 dB Level accuracy 0 5 dB External 10 MHz Ref Input HP E4421B or HP E4422B HP E4432B HP E4433B Cables Cable 50 Ω coaxial four required Connectors BNC m Length 122 cm 48 in HP 10503A Cable Test Cable 85680 60093 Adapters ...

Page 135: ...Oscillator Amplitude adjustment and the Reference 15 dB Attenuator adjustment Assembly Adjusted A4 log amp cal oscillator A5 IF assembly Related Performance Tests IF Gain Uncertainty Scale Fidelity Equipment Signal Generator HP E4421B Adapters Type N m to BNC f 1250 1476 Cables BNC 122 cm 48 in HP 10503A Test cable 85680 60093 Figure 2a 1 IF Amplitude Adjustment Setup ...

Page 136: ...Bm The effect of this adjustment is visible only after the ADJ CURR IF STATE sequence is complete ADJ CURR IF STATE causes the IF gain adjustment to use the new output amplitude from the cal oscillator When the adjustment sequence is complete the result of the adjustment should cause the 35 dBm signal at A5J5 to be displayed at 60 dBm This procedure also sets the attenuator of the reference 15 dB ...

Page 137: ...0 Hz 4 On the spectrum analyzer press MKR CAL and IF ADJ OFF 5 Set the HP E4421B controls as follows Frequency 10 7 MHz Amplitude 55 dBm Mod On Off Off 6 Note the marker value Ideally it should read 60 dBm 0 1 dB 7 If the marker reads less than 60 1 dBm rotate A4R826 CAL OSC AMPTD one third turn counter clockwise for every 0 1 dB less than 60 dBm See Figure 2a 2 for the location of A4R826 8 If the...

Page 138: ... 8 If the MKR amplitude is less than 49 9 dB rotate A5R343 15 dB ATTEN one half turn counterclockwise for each 0 1 dB less than 50 00 dB If the MKR amplitude is greater than 50 1 dB rotate A5R343 one half turn clockwise for each 0 1 dB greater than 50 00 dB Do not adjust A5R343 more than five turns before continuing with the next step 9 On the spectrum analyzer press ADJ CURR IF STATE Note the MKR...

Page 139: ...s as follows Center frequency 300 MHz Span 0 Hz Reference level 10 dBm Resolution BW 300 kHz 7 Connect a BNC cable between the spectrum analyzer CAL OUTPUT and INPUT 50Ω 8 On the spectrum analyzer press MKR CAL and REF LVL ADJ 9 Use the knob or step keys to adjust the REF LEVEL CAL setting until the MKR reads 10 00 dBm 0 1 dB 10 On the spectrum analyzer press STORE REF LVL ...

Page 140: ... Gain Accuracy RBW switching or Log Fidelity Log Fidelity Only if a repair is made to blocks D F H K IF Gain Accuracy RBW switching or Log Fidelity If multiple adjustments are required they should be done in the following order 1 Limiter Phase 2 Linear Fidelity 3 Log Fidelity All adjustments should be made with all of the shields on and only after allowing at least a 20 minute warmup Assembly Adju...

Page 141: ...140 Chapter2 Adjustment Procedures HP 3335A Source not Available 5a DC Log Amplifier Adjustments Figure 2a 3 IF Amplitude Adjustment Setup Figure 2a 4 IF Amplitude Adjustment Locations ...

Page 142: ...he spectrum analyzer 50Ω input Press LINE to turn the spectrum analyzer on 3 Set the spectrum analyzer controls as follows Center frequency 15 MHz Span 0 kHz Reference level 10 dBm Log division 1 Log division Resolution BW 300 kHz IF Adjust off 4 Set up an HP E4421B as follows Frequency 15 MHz Amplitude 18 dBm Mod On Off Off 5 On the spectrum analyzer press CAL and ADJ CURR IF STATE wait for the s...

Page 143: ...lows Frequency 15 MHz Amplitude 18 dBm Mod On Off Off 6 On the spectrum analyzer press PEAK SEARCH and MARKER DELTA 7 Reduce the input power by 40 dB to 58 dBm use an attenuator or a source with a good relative amplitude accuracy 8 If the signal is lower on the screen than expected delta marker reads a change of greater than 40 dB such as 41dB then adjust A4R544 see Figure 2a 4 for an even lower l...

Page 144: ...alyzer 50Ω input Press LINE to turn the spectrum analyzer on 3 On the spectrum analyzer press PRESET CAL IF ADJ OFF and ADJ CURR IF STATE 4 Set the spectrum analyzer controls as follows Center frequency 15 MHz Span 0 Resolution BW 300 kHz Reference level 10 dBm 5 Set up an HP E4421B as follows Frequency 15 MHz Amplitude 10 dBm 6 On the spectrum analyzer press MKR and MARKER DELTA then decrease the...

Page 145: ...144 Chapter2 Adjustment Procedures HP 3335A Source not Available 5a DC Log Amplifier Adjustments ...

Page 146: ...145 3 Assembly Replacement ...

Page 147: ...plifier page 191 A8 Low Band Mixer page 192 A9 Input Attenuator page 192 A10 Tracking Generator Option 002 page 194 A11 YTO page 195 A13 Second Converter page 196 Procedure 9 A14 and A15 Assemblies page 197 Procedure 10 A16 FADC A17 CRT Driver 8560E page 200 Procedure 11 B1 Fan page 203 Procedure 12 BT1 Battery page 204 Procedure 13 Rear Frame Rear Dress Panel page 205 Procedure 14 W3 Line Switch ...

Page 148: ... access to all major assemblies See Figure 3 1 on page 149 To remove the spectrum analyzer cover assembly refer to procedure 1 To access the A2 A3 A4 and A5 assemblies refer to procedure 5 To access the A14 and A15 assemblies refer to procedure 9 To remove and replace the backlight cables which illuminate the A18 LCD refer to procedure 2A To remove A17 LCD assembly refer to procedure 2A To remove ...

Page 149: ... Table 3 1 Required Tools Description HP Part Number 5 16 inch open end wrench 8720 0015 3 mm hex Allen wrench 8710 1366 4 mm hex Allen wrench 8710 1164 17 mm hex Allen wrench T362609 No 6 hex Allen wrench 5020 0289 7 mm nut driver 8710 1217 3 8 inch nut driver 8720 0005 7 16 inch nut driver 8720 0006 9 16 inch nut driver drilled out end covered 8720 0008 with heatshrink tubing Small No 1 pozidriv...

Page 150: ...ution to avoid damaging any cables 3 When installing the cover assembly be sure to locate the cover air vent holes on the bottom side of the spectrum analyzer Attach with the four screws loosened in step 2 and tighten the four screws gradually to ensure that the cover is seated in the front frame gasket groove 4 Torque each screw to 40 to 50 inch pounds to ensure proper gasket compression to minim...

Page 151: ...A2 controller board a Ribbon cable W60 which connects J8 on the A2 controller board with J1 on the A17 display driver board b W61 which connects J9 on the A2 controller board with J7 on the A17 display driver board 6 Disconnect ribbon cable W64 from the J1 VGA port on the rear panel do not disconnect W64 from the A17 display driver board 7 Disconnect the W3 line switch cable from the power supply ...

Page 152: ...t secure the volume knob to the face of the front panel If necessary use a 5 16 inch nut driver to drill out the nut which secures the VOLUME potentiometer assembly Cover the tip with heatshrink tubing or tape to avoid scratching the enameled front panel b CAL OUTPUT connector Use a 9 16 inch nut driver to remove the dress nut that holds the front panel CAL OUTPUT connector to the front panel If n...

Page 153: ... board to J1 on the rear panel b W63 a ribbon cable that connect J5 on the A17 display driver board with the LCD 4 If you want to remove the A17A1 inverter board proceed to step a If you intend to keep the A17A1 inverter board secured to the A17 display driver board proceed to step 4 a Remove the two screws 0515 0430 which secure the A17A1 inverter board to standoffs on the A17 display driver boar...

Page 154: ...Driver Board Inverter Board and LCD on page 152 2 Remove each backlight cable assembly 2090 0380 Carefully grasp the end of the metal backlight assembly which is connected to the backlight cable and pull the backlight out from its slot The backlight cable slots are located at the top and at the bottom of the LCD NOTE Whenever there is a need to replace a single backlight both backlights must be re...

Page 155: ...154 Chapter3 Assembly Replacement Procedure 2A A1 Front Frame A18 LCD 8560EC Figure 3 2 LCD Assembly Exploded View ...

Page 156: ... under Procedure 5 A2 A3 A4 and A5 Assemblies Removal Facing the front panel the A2 A3 A4 and A5 assemblies will lie to your left 4 Place the A1 front frame assembly in the chassis of the instrument a Position the A1 front frame assembly in the chassis b Insert the three screws 0515 1101 that secure the front frame chassis to the bottom of the spectrum analyzer c Insert the three screws 0515 1101 ...

Page 157: ...Route the W3 line switch cable from the right side of the instrument to the left side through the opening that can now be accessed since FL 1 has been loosened If the opening is still tight loosen or remove FL 1 using a 5 16 inch wrench c Secure the W3 line switch cable to the instrument chassis by routing it through the white collar that is adjacent to the power supply assembly on the chassis of ...

Page 158: ...in the LCD assembly in a clean room environment to ensure optimal performance of the LCD display Take all possible precautions to ensure that the glass plate is clean before placing it in the LCD assembly 3 Insert the LCD into the display mount The LCD is correctly oriented when the small ribbon cable from the LCD extends through an opening in the right side of the display mount and the two backli...

Page 159: ...the A17 display driver board the display driver shield has not yet been secured to the LCD backplate 13 Lower the display driver shield onto the LCD backplate Insert four screws 0515 0665 that secure the LCD backplate to the display driver board shield Use a T 10 TORX driver 14 Route cable W61 from J9 on the A2 controller board through the circular opening in the display driver shield to J7 on the...

Page 160: ...ced before the LCD and display driver can be replaced 1 Insert the line switch into the A1 front frame assembly Insert the two screws 0515 1521 that secure the line switch to the front frame 2 Insert the screw 0515 0430 that secures the striped green and white ground cable for the line switch this screw also secures the ground for the power probe if the black cable from the power probe cable assem...

Page 161: ...e proper grounding while discharging the A6A1W3 post accelerator cable Make sure that the spectrum analyzer line power switch is in the off position 6 Connect a high voltage probe 1000 1 such as the HP 34111A to a voltmeter with a 10 megohm input 7 Connect the clip lead of the probe ground to the chassis of the spectrum analyzer 8 Slip the tip of the high voltage probe under the rubber shroud of t...

Page 162: ... of the screwdriver under the A6A1W3 post accelerator cable rubber shroud and short the cable to ground on the CRT shield assembly 13 Pry out the black grommet protecting post accelerator cable A6A1W3 from the CRT shield assembly 14 Carefully unsnap the A6A1W3 post accelerator cable from the CRT and discharge it by shorting the cable to chassis ground on the CRT shield assembly 15 Place the spectr...

Page 163: ...162 Chapter3 Assembly Replacement Procedure 2B A1 Front Frame A18 CRT 8560E Figure 3 3 Discharging High Voltage on the CRT ...

Page 164: ...16 inch open end wrench to disconnect W41 from the front panel INPUT 50 Ω connector Loosen the opposite end of W41 19 For Option 002 spectrum analyzers use a 5 16 inch open end wrench to disconnect W47 from the front panel RF OUT 50 Ω connector 20 Disconnect W42 from A7J3 and the front panel 1ST LO OUTPUT connector For Option 002 spectrum analyzers disconnect W46 from the front panel 1ST LO OUTPUT...

Page 165: ...e tip with heatshrink tubing or tape to avoid scratching the enameled front panel 24 Remove screw 3 securing the line switch assembly to the front frame See Figure 3 4 on page 163 25 Gently remove the line switch assembly using caution to avoid damaging A1W1 and power indicator LED A1W1DS1 26 Remove A1W1 and A1W1DS1 from the line power switch assembly 27 Remove the three screws 1 securing the fron...

Page 166: ...move the front frame and CRT assemblies 33 Gently pull the CRT assembly off of the front frame assembly Figure 3 6 Installing the CRT and front Frame Assemblies Replacement NOTE Use care when handling the glass CRT EMI shield The glass may be cleaned using thin film cleaner HP part number 8500 2163 and a lint free cloth When installing the glass shield face the side of the glass with the silver co...

Page 167: ...front frame assembly as illustrated in Figure 3 7 on page 166 3 Place the front frame and CRT assemblies into the spectrum analyzer using caution to avoid pinching any cables 4 Dress the A18W1 trace align wires between the CRT assembly mounts and the A6 power supply top shield Figure 3 7 Placing the CRT into the Front Frame ...

Page 168: ...ch to connect W47 to the front panel RF OUT connector 15 Connect W36 coax 86 to the front panel IF INPUT connector 16 Use a 5 16 inch wrench to connect W41 from the A9 input attenuator to the front panel INPUT 50 Ω connector Make sure that W40 W36 and A1W1 are routed between W41 and the attenuator bracket Secure the A9 input attenuator bracket to the center support on the front frame using one pan...

Page 169: ...8 CRT 8560E 24 Replace the spectrum analyzer cover assembly 25 Connect the line power cord and switch the spectrum analyzer power on If the display does not operate properly turn off spectrum analyzer power disconnect the line cord and recheck the spectrum analyzer ...

Page 170: ... Remove the rubber keypad NOTE In 8560E instruments the front panel softkey actuators are part of the CRT bezel assembly and are not replaceable Should the softkeys become damaged replace the bezel assembly Replacement 1 Install the rubber keypad ensuring that the screw holes are visible through the pad 2 Place the A1A1 keyboard assembly over the rubber keypad Secure with nine panhead screws 3 Con...

Page 171: ...er 6 hex Allen wrench Proceed to step 4 4 Use a 7 16 inch nut driver set to 20 in lbs to remove the nut holding the RPG shaft to the front panel 5 Remove the RPG Replacement 1 Place the RPG into the front frame with the cable facing the bottom of the spectrum analyzer Place a lock washer and nut on the RPG shaft to hold it in the frame If the serial number of your instrument is below 3738A03198 85...

Page 172: ...ne assembly at a time binds the hinges attaching the assemblies and may damage an assembly and hinge 5 The board assemblies are attached to the right side frame of the spectrum analyzer with two hinges Fold both the A2 and A3 assemblies out of the spectrum analyzer as a unit 6 Fold both the A4 and A5 assemblies out of the spectrum analyzer as a unit 7 Remove the cables from the assembly being remo...

Page 173: ...er on its right side on the work bench 2 Attach the assembly being installed to the two chassis hinges with two panhead screws 3 Leave the assembly in the folded out position and attach ribbon cables W1 and W2 4 Attach all cables to the assembly as illustrated in Figure 3 9 on page 173 5 Locate the cable clip on the inside of the right side frame Make sure ...

Page 174: ...clip as illustrated in Figure 3 12 on page 175 for EC series instruments and in Figure 3 13 on page 176 for E series instruments 6 Lay the A2 A3 A4 and A5 assemblies flat against each other in the folded out position Make sure that no cables become pinched between the two assemblies Figure 3 9 Assembly Cables 1 of 3 EC Series ...

Page 175: ...174 Chapter3 Assembly Replacement Procedure 5 A2 A3 A4 and A5 Assemblies Figure 3 10 Assembly Cables 2 of 3 EC series Figure 3 11 Assembly Cables 3 of 3 E series ...

Page 176: ...5 Assembly Replacement Procedure 5 A2 A3 A4 and A5 Assemblies Figure 3 12 Coaxial Cable Clip EC Series 7 Check to ensure that no cables will become pinched under the hinges when folding up the A4 and A5 assemblies ...

Page 177: ...ctrum analyzer Be sure to fold HP IB cable A19W1 between the A3 and A4 assemblies using the two sets of hook and loop Velcro fasteners 10 Fold ribbon cable A1A1W1 between A3 and A4 assemblies Take care to dress the protective tubing as close to A3J602 connector as possible so that the tubing does not fold with the cable See Figure 3 14 on page 177 11 Attach ribbon cable W4 to A2J6 while folding up...

Page 178: ...Chapter 3 177 Assembly Replacement Procedure 5 A2 A3 A4 and A5 Assemblies Figure 3 14 HP IB and A1A1 W1 Cable Placement ...

Page 179: ...r assembly Refer to Procedure 1 Spectrum Analyzer Cover 3 Fold out the A2 A3 A4 and A5 assemblies as described in steps 2 through 6 under Procedure 5 A2 A3 A4 and A5 Assemblies Removal 4 Place the spectrum analyzer on the workbench with A2 A3 A4 and A5 folded out to the right 5 Remove the three screws securing the power supply shield to the power supply and remove the shield See Figure 3 16 on pag...

Page 180: ...Chapter 3 179 Assembly Replacement Procedure 6A A6 Power Supply Assembly 8560EC Figure 3 15 Power Supply Cover ...

Page 181: ...o A6J4 and the line power jack to A6J101 See Figure 3 17 on page 183 4 Ensure that all cables are safely routed and will not be damaged when securing the A6 cover 5 Secure the power supply cover shield to the power supply using three flathead screws 1 See Figure 3 16 on page 180 One end of the cover fits into a slot provided in the rear frame assembly Ensure that the extended portion of the cover ...

Page 182: ...p on the workbench with A2 A3 A4 and A5 folded out to the right WARNING The voltage potential at A6A1W3 is 9 kV Disconnect at the CRT with caution Failure to properly discharge A6A1W3 may result in severe electrical shock to personnel and damage to the instrument 5 Connect the spectrum analyzer line power cord to provide proper grounding while discharging the A6A1W3 post accelerator cable Make sur...

Page 183: ...ee Figure 3 17 on page 183 15 Disconnect all cables from the A6 power supply assembly See Figure 3 17 on page 183 16 Use a TORX screwdriver to remove the hardware from the shield wall the heatsink and the A6 power supply assembly 17 Remove the A6 power supply assembly by lifting from the regulator heatsink toward front of spectrum analyzer Replacement 1 Ensure that the bottom shield wall is in pla...

Page 184: ...bles are safely routed and will not be damaged when securing the A6 cover 7 Secure the power supply cover shield to the power supply using three flathead screws 1 See Figure 3 18 on page 184 One end of the cover fits into a slot provided in the rear frame assembly Ensure that the extended portion of the cover shield is seated in the shield ...

Page 185: ...edure 6B A6 Power Supply Assembly 8560E wall groove 8 Fold the A2 A3 A4 and A5 assemblies into the spectrum analyzer as described in steps 6 through 12 under Procedure 5 A2 A3 A4 and A5 Assemblies Replacement Figure 3 18 Power Supply Cover ...

Page 186: ...at A6A1W3 is 9 kV Disconnect at the CRT with caution Failure to properly discharge A6A1W3 may result in severe electrical shock to personnel and damage to the instrument 5 Connect the spectrum analyzer line power cord to provide proper grounding while discharging the A6A1W3 post accelerator cable Make sure that the spectrum analyzer line power switch is in the off position 6 Connect a high voltage...

Page 187: ...d 15 Remove the three screws securing the A6A1 high voltage assembly to the A6 power supply assembly 16 Disconnect ribbon cable A6A1W1 from A6J5 See Figure 3 17 on page 183 17 For Option 007 spectrum analyzers Remove the two screws 1 securing two board mounting posts to the left side frame and remove the posts See Figure 3 19 on page 187 18 Remove the two left side frame screws 2 securing the A17 ...

Page 188: ...re safely routed and will not be damaged when securing the A6 cover 5 Secure the power supply cover shield to the power supply using three flathead screws 1 See Figure 3 18 on page 184 One end of the cover fits into a slot provided in the rear frame assembly Ensure that the extended portion of the cover shield is seated in the shield wall groove 6 Connect A6A1W2 to A17J6 7 Place the A17 CRT Driver...

Page 189: ...the two flathead screws removed in step 18 under Removal See Figure 3 19 on page 187 2 10 For Option 007 spectrum analyzers Connect the two mounting posts to the left side frame using the two screws removed in step 17 under Removal See Figure 3 19 on page 187 1 11 Fold the A2 A3 A4 and A5 assemblies into the spectrum analyzer and secure the spectrum analyzer cover assembly as described in Procedur...

Page 190: ... or A10 tracking generator Option 002 assembly is being removed also fold down the A2 A3 A4 and A5 assemblies as described in Procedure 5 A2 A3 A4 and A5 assemblies A7 First LO Distribution Amplifier A8 Low Band Mixer A9 Input Attenuator A10 Tracking Generator Option 002 A11 YTO A13 Second Converter Figure 3 20 on page 190 illustrates the location of the assemblies and Figure 3 21 on page 191 prov...

Page 191: ...190 Chapter3 Assembly Replacement Procedure 8 A7 through A13 Assemblies Figure 3 20 Assembly Locations ...

Page 192: ...ions A7 1st LO Distribution Amplifier Removal 1 Remove the two screws securing the assembly to the spectrum analyzer center deck 2 Use a 5 16 inch wrench to disconnect W38 and W39 at A7J1 and J2 3 Disconnect W42 W43 on Option 002 at the front panel 1ST LO OUTPUT connector Loosen W42 W43 on Option 002 at A7J3 ...

Page 193: ...und lug on the screw next to A7J4 6 Torque all SMA RF cable connectors to 113 Ncm 10 in lb A8 Low Band Mixer Removal 1 Use a 5 16 inch wrench to remove W45 from FL1 and A8J1 2 Loosen the semi rigid coax cable connections at A8J2 and A8J3 3 Remove the two screws securing A8 to the center deck 4 Remove all semi rigid coax cables from the A8 assembly Replacement 1 Place A8 on the center deck and atta...

Page 194: ...attenuator 2 Place the A9 input attenuator into the spectrum analyzer with the A9 mounting brackets resting against the front frame center support and the right side frame Use caution to avoid damaging any cables 3 Attach the attenuator to the center support with one panhead screw 1 See Figure 3 21 on page 191 4 Attach the attenuator to the right side frame using one flathead screw 1 See Figure 3 ...

Page 195: ...r deck These screws are located on the top side of the center deck as illustrated in Figure 3 23 on page 194 4 Remove the A10 tracking generator and disconnect W48 coax 80 Figure 3 23 A10 Tracking Generator Mounting Screws Replacement 1 Connect W48 coax 80 to the A10 tracking generator INPUT connector 2 Orient the tracking generator so that its LO IN LO OUT and RF OUT connectors are closest to the...

Page 196: ...0 tracking generator before proceeding 2 Place the spectrum analyzer top side down on the workbench 3 Use a 5 16 inch wrench to remove W56 FL2 W57 as a unit 4 Disconnect W38 at the A11 assembly 5 Remove the A11 mounting screws 1 shown in Figure 3 24 on page 195 6 Disconnect W10 from A11 Figure 3 24 A11 Mounting Screws Replacement 1 Reconnect W10 to A11 2 Place the A11 assembly in the spectrum anal...

Page 197: ...bench 2 Disconnect W33 coax 81 and W35 coax 92 from the A13 assembly 3 For Option 002 instruments Disconnect W48 coax 8 from A13J3 4 Disconnect W57 from A13J1 5 Remove the four screws securing A13 to the main deck and remove the assembly 6 Disconnect ribbon cable W13 from the A13 assembly Replacement 1 Connect ribbon cable W13 to the A13 assembly 2 Secure A13 to the spectrum analyzer main deck usi...

Page 198: ... 1 Remove the spectrum analyzer cover as described in Procedure 1 Spectrum Analyzer Cover 2 Place the spectrum analyzer on its right side frame 3 Remove the eight screws 1 holding the A14 and A15 assemblies to the bottom of the spectrum analyzer See Figure 3 25 on page 197 Figure 3 25 A14 and A15 Assembly Removal ...

Page 199: ...h pounds Applying excessive torque will cause the screws to stretch Replacement 1 Attach the removed assembly to the two chassis hinges with two panhead screws 2 Attach all cables to the assembly as illustrated in Figure 3 26 on page 199 When connecting W34 to A15 torque the SMA connector to 113 Ncm 10 in lb 3 Lay the A14 and A15 assemblies flat against each other in the folded out position Make s...

Page 200: ...Chapter 3 199 Assembly Replacement Procedure 9 A14 and A15 Assemblies Figure 3 26 A14 and A15 Assembly Cables ...

Page 201: ...ght 3 For Option 007 spectrum analyzers Remove two screws 1 securing the two board mounting posts to the left side frame and remove the posts See Figure 3 27 on page 201 4 Remove two screws 2 securing the A17 assembly and A16 assembly in Option 007 to the left side frame Remove the two spacers non Option 007 5 Pull the A17 assembly out of the spectrum analyzer 6 For Option 007 spectrum analyzers P...

Page 202: ...oved so that proper A16 assembly cable routing may be viewed Place the A16 assembly into the center deck mounting slot nearest the left side frame 3 Secure the A17 assembly and A16 assembly in Option 007 to the left side frame using two flathead screws and two spacers in non Option 007 For Option 007 Attach the board mounts to the left side frame using two flathead screws 1 See Figure 3 27 on page...

Page 203: ...202 Chapter3 Assembly Replacement Procedure 10 A16 FADC A17 CRT Driver 8560E Figure 3 28 A16 Cable Routing ...

Page 204: ...njury 1 Remove the four screws securing the fan assembly to the rear frame 2 Remove the fan and disconnect the fan wire from the A6 Power Supply assembly 3 To reinstall the fan connect the fan wire to A6J3 and place the wire into the channel provided on the left side of the rear frame opening Secure the fan to the rear frame using four panhead screws NOTE The fan must be installed so that the air ...

Page 205: ... will deteriorate quickly When the instrument is turned off stored states and traces will only be retained for a short time and may be lost Refer to State and Trace Storage Problems in Chapter 9 Controller Section in this manual The battery should be replaced if its voltage is 2 6 V or less Removal Replacement 1 Remove any option module attached to the rear panel 2 Locate the battery assembly cove...

Page 206: ...parate diagrams are provided 1 Disconnect the line power cord from the spectrum analyzer 2 Remove the spectrum analyzer cover and place the spectrum analyzer on its right side frame 3 Fold out the A2 A3 A4 and A5 assemblies as described in Procedure 5 A2 A3 A4 and A5 Assemblies Removal steps 3 through 5 4 Disconnect the HP IB cable at A2J5 5 Place the spectrum analyzer top side up on the work benc...

Page 207: ...y shield to the power supply and remove the shield See 1 in Figure 3 30 14 Disconnect the fan and line power cables from A6J3 and A6J101 on the A6 power supply assembly 15 Remove the two flathead screws that secure the rear panel battery assembly and remove the assembly Remove the battery and unsolder the two wires attached to the battery assembly 16 Use a 9 16 inch nut driver to remove the dress ...

Page 208: ... knurled nut on the earphone jack A lock washer should be used on the inside of the rear frame and a flat washer on the outside 4 Place the coax cable s BNC connectors into the appropriate rear frame holes as described below Use a 9 16 inch nut driver to attach the dress nuts holding the BNC connectors to the rear frame 5 Secure the rear frame to the spectrum analyzer main deck using four panhead ...

Page 209: ... fan and line power cables to A6J3 and A6J101 on the A6 power supply For EC series instruments proceed to step 13 For E series instruments proceed to step 11 11 Snap the A6A1W3 post accelerator cable to the CRT assembly 12 Snap the black grommet protecting A6A1W3 into the CRT shield 13 Ensure that all cables are safely routed and will not be damaged when securing the A6 cover 14 Secure the power s...

Page 210: ...Chapter 3 209 Assembly Replacement Procedure 13 Rear Frame Rear Dress Panel Figure 3 30 A6 Power Supply Cover ...

Page 211: ...W3 is 9 kV Disconnect at the CRT with caution Failure to properly discharge A6A1W3 may result in severe electrical shock to personnel and damage to the instrument 5 Connect the spectrum analyzer line power cord to provide proper grounding while discharging the A6A1W3 post accelerator cable Make sure that the spectrum analyzer line power switch is in the off position 6 Connect a high voltage probe ...

Page 212: ...1W1 and A1W1DS1 from the line switch assembly Let each hang freely NOTE If contact removal tool HP part number 8710 1791 is available complete assembly removal by performing Removal steps 20 and 21 If not skip to step 23 under Removal 20 With wire cutters clip the tie wrap holding the cable to the contact housing From the top side of the spectrum analyzer use contact removal tool HP part number 87...

Page 213: ...212 Chapter3 Assembly Replacement Procedure 14 W3 Line Switch Cable 8560E cables for the probe power and line switch and d remove the line switch Figure 3 31 W3 Dress and Connection to A6 Power Supply ...

Page 214: ...Chapter 3 213 Assembly Replacement Procedure 14 W3 Line Switch Cable 8560E Figure 3 32 Line Switch Mounting Screw and Cable Dress ...

Page 215: ...214 Chapter3 Assembly Replacement Procedure 14 W3 Line Switch Cable 8560E Figure 3 33 W3 Cable Connector ...

Page 216: ... Dress W3 between the main deck standoff and the side frame See Figure 3 32 on page 213 7 On the top side of the spectrum analyzer redress W3 8 Insert the four contacts into the W3 connector 9 Attach the cable to the connector housing using the supplied tie wrap 10 Connect W3 to A6J2 Dress W3 into the slotted opening in the deck 11 Connect A1A1W1 to A3J602 12 Secure the power supply cover shield t...

Page 217: ...CH M4 X 0 7 8 mm LG FLAT HD 3 2 SCREW MACH M3 X 0 5 35 mm LG FLAT HD 2 3 SCREW MACH M3 X 0 5 6 mm LG FLAT HD 6 3 Dress W3 between the main deck standoff and the side frame See Figure 3 32 on page 213 4 Attach the A1 Front Frame assembly following the A18 CRT assembly instructions as described in steps 1 through 16 under Procedure 2B A1 Front Frame A18 CRT 8560E 5 Place LED A1W1DS1 into the line sw...

Page 218: ...ssembly Ensure that the extended portion of the cover shield is seated in the shield wall groove See Figure 3 30 on page 209 11 Place W3 and the other cable assemblies between the CRT assembly and the power supply cover so the W9 wires are underneath the surface of the power supply cover 12 Fold up the A2 A3 A4 and A5 assemblies into the spectrum analyzer as described in steps 5 through 10 under P...

Page 219: ... W3 Line Switch Cable 8560E 15 Connect the line power cord and switch the spectrum analyzer power on If the spectrum analyzer does not operate properly turn off the spectrum analyzer power disconnect the line cord and recheck the spectrum analyzer ...

Page 220: ...the EEROM into the program RAM 5 Using a nonmetallic tool carefully remove the defective EEROM 6 Carefully install a new EEROM 7 Press COPY TO EEROM The spectrum analyzer will store the contents of the program RAM into the new EEROM 8 Turn the HP 8560E EC LINE switch off then on cycling the spectrum analyzer power Allow the power on sequence to finish 9 If error message 701 702 or 703 is displayed...

Page 221: ...220 Chapter3 Assembly Replacement Procedure 15 EEROM A2U501 or A2U500 described in Procedure 5 A2 A3 A4 and A5 Assemblies Secure the spectrum analyzer cover assembly ...

Page 222: ...s right side frame 3 Fold out the A14 and A15 assemblies as described in steps 3 and 4 under Procedure 9 A14 and A15 Assemblies Removal 4 Remove the three screws 1 and three shoulder washers securing the OCXO to the main deck See Figure 3 35 on page 222 5 Disconnect W49 coax 82 from the OCXO and disconnect W50 orange cable from the A15 RF assembly Clip the tie wraps that hold W49 and W50 together ...

Page 223: ...in the spectrum analyzer Dress W50 orange cable next to W49 through the opening in the deck 2 Secure the OCXO to the spectrum analyzer main deck using three screws 1 and three shoulder washers See Figure 3 35 on page 222 3 Fold the A14 and A15 assemblies into the spectrum analyzer as described in procedure 9 4 Perform the rear frame assembly replacement procedure described in procedure 13 ...

Page 224: ...223 4 Replaceable Parts ...

Page 225: ... 10 on page 245 Parts List Front Frame 8560EC Table 4 11 on page 246 Parts List Front Frame 8560E Table 4 12 on page 247 Parts List Rear Frame 8560EC Table 4 13 on page 248 Parts List Rear Frame 8560E Figure 4 1 on page 241 Parts Identification Assembly Mounting Figure 4 2 on page 249 Parts Identification Cover Assembly Figure 4 3 on page 251 Parts Identification Main Chassis 8560E Figure 4 4 on p...

Page 226: ... Prepaid transportation There is a small handling charge for each order No invoices To provide these advantages a check or money order must accompany each order Mail order forms and specific ordering information is available through your local Hewlett Packard Sales and Service office See Table 1 6 on page 47 Direct Phone Order System Within the USA a phone order system is available for regular and...

Page 227: ...ted for each part 1 The Hewlett Packard part number 2 The total quantity Qty in the assembly This quantity is given only once at the first appearance of the part in the list 3 The description of the part 4 A five digit code indicating a typical manufacturer of the part 5 The manufacturer part number ...

Page 228: ...ttery Stationary Portion TC Thermocouple C Capacitor Jack TP Test Point CP Coupler K Relay U Integrated Circuit CR Diode Diode L Coil Inductor Microcircuit Thyristor Step M Meter V Electron Tube Recovery Diode MP Miscellaneous VR Breakdown Diode Varactor Mechanical Part Zener DC Directional Coupler P Electrical Connector Voltage Regulator DL Delay Line Movable Portion W Cable Wire Jumper DS Annunc...

Page 229: ...Clockwise formerly Plastic Continuous Wave USASI ASA CD Cadmium Card D ASSY Assembly Cord AWG American Wire Gage CER Ceramic D Deep Depletion CHAM Chamfer Depth Diameter B CHAR Character Direct Current BCD Binary Coded Characteristic DA Darlington Decimal Charcoal DAP GL Diallyl Phthalate BD Board Bundle CMOS Complementary Glass BE CU Beryllium Copper Metal Oxide DBL Double BNC Type of Connector S...

Page 230: ...d Circuit Throw Bandwidth Product ID Identification Inside Diameter DWL Dowell Transition IN Inch E Frequency Feet Foot INT Integral Intensity Internal E R E Ring FXD Fixed J EXT Extended Extension JFET Junction Field External Extinguish G Effect Transistor F GEN General Generator K F Fahrenheit Farad GND Ground K Kelvin Key Kilo Potassium Female Film Resistor GP General Purpose KNRLD Knurled Fixe...

Page 231: ... NS Nanosecond PNL Panel MC Molded Carbon Non Shorting Nose PNP Positive Negative MET Metal Metallized NUM Numeric Positive Transistor MHz Megahertz NYL Nylon Polyamide POLYC Polycarbonate MINTR Miniature O POLYE Polyester MIT Miter POT Potentiometer MLD Mold Molded OA Over All POZI Pozidriv Recess MM Magnetized Material OD Outside Diameter PREC Precision Millimeter OP AMP Operational PRP Purple P...

Page 232: ...eAcoustic Wave Resonator Typical Alternating Current SEG Segment PB Lead Metal VAR Variable SGL Single TA Ambient VDC Volts Direct Current SI Silicon Temperature W Square Inch Tantalum W Watt Wattage SL Slide Slow TC Temperature Coefficient White Wide Width SLT Slot Slotted THD Thread Threaded W SW With Switch SMA Type Threaded Subminiature A Connector THK Thick WW Wire Wound TO Package Type W Wat...

Page 233: ...es Spectrum Analyzer Component Level Information Table 4 3 Reference Designations Abbreviations and Multipliers 4 of 4 MULTIPLIERS Abbreviation Prefix Multiple Abbreviation Prefix Multiple T tera 1012 m milli 10 3 G giga 109 µ micro 10 6 M mega 106 n nano 10 9 k kilo 103 p pico 10 12 da deka 10 f femto 10 15 d deci 10 1 a atto 10 18 c centi 10 2 ...

Page 234: ...SCREW MACH M3 5 0 6 6MM LG 28480 0515 0889 0515 1241 8 SCREW MACH M5 0 8 12 MM LG PAN HD 28480 0515 1241 0515 1331 22 SCREW METRIC SPECIALTY M4 0 7 THD 7MM 28480 0515 1331 5061 9679 2 MOUNT FLANGE 28480 5061 9679 0515 1114 6 SCREW MACH M4 0 7 10MM LG PAN HD 28480 0515 1114 8710 1755 WRENCH HEX KEY 55719 AWML4 5958 6573 2 ASSEMBLY INSTRUCTIONS 28480 5958 6573 OPTION 909 5062 1900 1 RACK KIT WITH FL...

Page 235: ...3J602 A1A2 0960 0745 1 RPG ASSEMBLY Includes Cable 28480 0960 0745 A1A2 0960 0745 1 RPG ASSEMBLY Includes Cable 28480 0960 0745 A1W1 8120 8153 1 CABLE ASSEMBLY PROBE POWER LED 28480 8120 8153 A2 8560EC 08563 60160 1 CONTROLLER ASSEMBLY 28480 08563 60160 A2 8560E 08563 60032 1 CONTROLLER ASSEMBLY 28480 08563 60032 A3 08563 60021 1 INTERFACE ASSEMBLY 28480 08563 60021 A3 08563 60033 1 INTERFACE ASSE...

Page 236: ... 28480 0950 3644 A17 8560E 08563 60101 1 CRT ASSEMBLY 28480 08563 60101 A18 8560EC 08563 60170 1 LCD ASSEMBLY Includes LCD LCD MOUNT LCD GLASS and two BACKLIGHTS 28480 08563 60170 A18DS1 and A18DS2 2090 0380 1 Replaceable LCD Backlight Cartridge part of LCD ASSEMBLY 28480 2090 0380 A18 8560E 1 CRT ASSEMBLY Order by Individual Parts A18MP 8560E 5062 7095 1 CRT WIRING ASSEM Includes Shield A18L1 and...

Page 237: ...80 5063 0221 5063 0219 1 AMP 2 TOP 28480 5063 0219 5063 0220 1 AMP 2 BOTTOM 28480 5063 0220 0515 1486 4 SCREW SMM 2 5 10 PNTROX 28480 0515 1486 0515 2080 23 SCREW M2 5 14L 28480 0515 2080 2190 0583 23 WSHR LK M2 5ID 28480 2190 0583 0905 0375 23 0 RING 070ID 28480 0905 0375 A5 Assembly 5021 6729 1 IF 1 TOP 28480 5021 6729 5021 6730 1 IF 1 BOTTOM 28480 5021 6730 5021 6731 1 IF 2 TOP 28480 5021 6731 ...

Page 238: ...5697 W7 8120 6172 1 CABLE ASSEMBLY RIBBON 28480 8120 6172 Option 007 A2J3 to A17J1 A16J1 and A16J2 W8 5061 9030 1 CABLE ASSEMBLY DISPLAY POWER 28480 5061 9030 A6J4 to A17J2 W9 5062 6482 1 CABLE ASSEMBLY CRT YOKE 28480 5062 6482 A17J3 and J7 to A18V1 W10 5062 0742 1 CABLE ASSEMBLY RIBBON A11 YTO DRIVE 28480 5062 0742 A14J3 to A11J1 W11 08562 60064 1 CABLE ASSEMBLY RIBBON A9 ATTEN 28480 08562 60064 ...

Page 239: ...LY COAX 8 REF IN OUT 28480 5062 0722 A15J301 to Rear Panel J9 W32 5062 0705 1 CABLE ASSEMBLY COAX 87 SAMPLER IF 28480 5062 0705 A15J101 to A14J501 W33 5062 0706 1 CABLE ASSEMBLY COAX 81 2ND LO 28480 5062 0706 DRIVE A15J701 to A13J4 W34 8120 5446 1 CABLE ASSEMBLY COAX 0 1ST LO SAMP 28480 8120 5446 A7J4 to A15A2J1 W35 5062 0710 1 CABLE ASSEMBLY COAX 92 INT 2ND IF 28480 5062 0710 A13J2 to A15J801 W36...

Page 240: ...2 6478 1 CABLE ASSEMBLY COAX 84 10 MHz REF2 28480 5062 6478 A15J304 to A4J7 W52 5062 6477 1 CABLE ASSEMBLY COAX 9 10 7 MHz CAL SIG 28480 5062 6477 A5J4 to A4J8 W53 5062 6476 1 CABLE ASSEMBLY COAX 1 FREQ COUNTER 28480 5062 6476 A2J7 to A4J5 W54 5062 6475 1 CABLE ASSEMBLY COAX 2 VIDEO 28480 5062 6475 A3J101 to A4J4 W55 5062 6471 1 CABLE ASSEMBLY AUDIO 28480 5062 6471 A4J6 to LSI J1 and Rear Panel J1...

Page 241: ...o A17J7 28480 8120 5026 W62 8120 8482 1 CABLE RIBBON A17J6 to A17A1 28480 8120 8482 W63 8120 8409 1 CABLE RIBBON A17J5 to A18 28480 8120 8409 W64 8121 0062 1 VGA CABLE ASSEMBLY A17J4 to J1 on rear panel 28480 8121 0062 Table 4 4 Replaceable Parts Reference Designator HP Part Number Qty Description Mfr Code Mfr Part Number ...

Page 242: ...er Qty Description Mfr Code Mfr Part Number 1 0515 1349 11 SCREW MACH M3 X 30MM LG PAN HD TORX 28480 0515 1349 2 0515 2310 3 SCREW MACH M3 X 60MM LG PAN HD TORX 28480 0515 2310 3 0515 2308 2 SCREW MACH M3 X 100MM LG PAN HD TORX 28480 0515 2308 4 0515 2332 10 SCREW MACH M3 X 6MM LG PAN HD TORX 28480 0515 2332 4 0515 0664 2 SCREW MACH M3 X 12MM LG PAN HD TORX 28480 0515 0664 ...

Page 243: ...9 0515 1218 4 SCREW SKT HD CAP M5 X 40MM LG 28480 0515 1218 20 08562 80028 1 INSULATOR 292 X 355 MM 51 THK 28480 08562 80028 Table 4 7 Parts List Main Chassis 8560EC see Figure 4 8 Item HP Part Number Qty Description Mfr Code Mfr Part Number 1 0515 2145 4 SCREW MACH M3 X 8MM LG PAN HD TORX 28480 0515 2145 4 0380 2052 2 SPACER 0 937LG 0 166ID 28480 0380 2052 5 5002 1010 1 COVER A6 POWER SUPPLY Incl...

Page 244: ...5 3 0515 1715 3 SCREW MACH M3 X 35MM LG PAN HD TORX 28480 0515 1715 4 0380 2052 2 SPACER 937LG 166ID 28480 0380 2052 5 5002 1010 1 COVER A6 POWER SUPPLY 28480 5002 1010 5181 8215 1 WARNING LABEL not shown 28480 5181 8215 08562 80029 1 INSULATOR 100 X 140 not shown 28480 08562 80029 6 0515 2309 3 SCREW MACH M3 X 0 5 45MM LG TORX 28480 0515 2309 7 5041 7246 1 BOARD CLIP 28480 5041 7246 8 0515 0372 2...

Page 245: ...CH M3 X 35MM LG TORX 28480 0515 2164 28 0515 1227 2 SCREW MACH M3 X 6MM LG FLH HD TORX 28480 0515 1227 29 5181 8214 1 LABEL ASSEMBLY LOCATIONS 28480 5181 8214 30 5063 0269 1 SHIELD WALL TOP 28480 5063 0269 31 5063 0268 1 SHIELD WALL BOTTOM 28480 5063 0268 A18MP1 5062 7095 1 CRT WIRING ASSY INCLUDES A18L1 A18W1 28480 5062 7095 A18MP2 5041 3987 1 SPACER CRT 28480 5041 3987 A18V1 2090 0225 1 TUBE CRT...

Page 246: ...5 1227 22 0515 1227 4 SCREW MACH M3 X 6MM LG FLH HD TORX 28480 0515 1227 23 0515 1410 2 SCREW MACH M3 X 20MM LG PAN HD TORX 28480 0515 1410 Table 4 10 Parts List Front Frame 8560EC see Figure 4 9 Item HP Part Number Qty Description Mfr Code Mfr Part Number 1 08560 80037 1 DRESS PANEL OVERLAY 28480 08560 80037 08560 80039 1 DRESS PANEL OVERLAY OPTION 002 28480 08560 80039 2 08560 80039 CONNECTOR DR...

Page 247: ...tem HP Part Number Qty Description Mfr Code Mfr Part Number 1 0515 1622 4 SCREW SKT HD CAP M4 X 0 7 8MM LG 28480 0515 1622 2 5041 8906 1 CRT BEZEL 28480 5041 8906 3 1000 0897 1 RFI CRT FACEPLATE 28480 1000 0897 4 0370 3069 1 KNOB BASE 1 1 8 JGK 252 IN IO INCLUDES 5 28480 0370 3069 5 3030 0022 2 SCREW SET 6 32 125 IN LG SMALL CUP PT 00000 DESCRIBE 6 2950 0043 1 NUT HEX DBL CHAM 3 8 32 THD 094 IN TH...

Page 248: ...90 0067 35 2950 0072 1 NUT HEX 1 4 32 THD 28480 2950 0072 36 0370 3079 1 KNOB RND 125 JG 28480 0370 3079 Table 4 12 Parts List Rear Frame 8560EC see Figure 4 10 Item HP Part Number Qty Description Mfr Code Mfr Part Number 1 0515 1946 2 SCREW MACH M3 6MM LG FLH HD TORX 28480 0515 1946 2 5062 7755 1 BATTERY HOLDER INCLUDES WIRES 28480 5062 7755 3 0515 2216 4 SCREW MACH M4 40MM LG PAN HD TORX 28480 0...

Page 249: ...HD FOR 0 5 D HOLE STL 05093 6960 0149 8 6960 0023 1 PLUG HOLE DOME HD FOR 0 312 D HOLE STL 04213 D 2730 LC2 9 1250 1753 1 ADAPTOR COAX STR F SMA OPT 001 28480 1250 1753 INCLUDES WASHER AND NUT 10 0515 1946 4 SCREW MACH M3 6MM LG FLH HD TORX 28480 0515 1946 11 0515 0684 1 SCREW MACH M3 6MM LG PAN HD TORX 28480 0515 0684 12 2950 0035 5 NUT HEX 15 32THD 28480 2950 0035 13 5062 4838 1 CONNECTOR TEL 2 ...

Page 250: ...Chapter 4 249 Replaceable Parts Firmware Dependent Part Numbers Figure 4 2 Parts Identification Cover Assembly Replace with sj16c ...

Page 251: ...250 Chapter4 Replaceable Parts Firmware Dependent Part Numbers ...

Page 252: ...Chapter 4 251 Replaceable Parts Firmware Dependent Part Numbers Figure 4 3 Parts Identification Main Chassis 8560E Replace with sp11c ...

Page 253: ...252 Chapter4 Replaceable Parts Firmware Dependent Part Numbers ...

Page 254: ...Chapter 4 253 Replaceable Parts Firmware Dependent Part Numbers Figure 4 4 Parts Identification RF Section Replace with sj128c ...

Page 255: ...254 Chapter4 Replaceable Parts Firmware Dependent Part Numbers ...

Page 256: ...Chapter 4 255 Replaceable Parts Firmware Dependent Part Numbers Figure 4 5 Parts Identification Front Frame 1 of 2 8560E Replace with sj163e ...

Page 257: ...256 Chapter4 Replaceable Parts Firmware Dependent Part Numbers ...

Page 258: ...Chapter 4 257 Replaceable Parts Firmware Dependent Part Numbers Figure 4 5 Parts Identification Front Frame 2 of 2 Option 002 Replace with sj162e ...

Page 259: ...258 Chapter4 Replaceable Parts Firmware Dependent Part Numbers ...

Page 260: ...Chapter 4 259 Replaceable Parts Firmware Dependent Part Numbers Figure 4 6 Parts Identification Rear Frame 8560E Replace with sj11c ...

Page 261: ...260 Chapter4 Replaceable Parts Firmware Dependent Part Numbers ...

Page 262: ...Chapter 4 261 Replaceable Parts Firmware Dependent Part Numbers Figure 4 7 Parts Identification Chassis 8560EC Replace with sj120c ...

Page 263: ...262 Chapter4 Replaceable Parts Firmware Dependent Part Numbers ...

Page 264: ...Chapter 4 263 Replaceable Parts Firmware Dependent Part Numbers Figure 4 8 Parts Identification Front Frame 8560EC Replace with sj125c ...

Page 265: ...264 Chapter4 Replaceable Parts Firmware Dependent Part Numbers ...

Page 266: ...Chapter 4 265 Replaceable Parts Firmware Dependent Part Numbers Figure 4 9 Parts Identification Rear Frame 8560EC replace with sj119c ...

Page 267: ...266 Chapter4 Replaceable Parts Firmware Dependent Part Numbers ...

Page 268: ...267 5 Major Assembly and Cable Locations ...

Page 269: ... page 279 NOTE Diagrams that illustrate features common to E series and EC series instruments are shown with E series instruments Where there are differences between E series and EC series features separate diagrams are provided for E series and for EC series instruments Use the list below to determine the figure s illustrating the desired assembly or cable Assemblies Figure A1 Front Frame 5 8 A1A...

Page 270: ...ve Cable 5 8 5 9 W11 Attenuator Drive Cable 5 6 W12 A7 LODA Drive Cable 5 8 5 9 W13 A13 Second Conv Drive Cable 5 8 W14 A10 Control Signal Cable Option 002 5 8 5 9 W15 NOT ASSIGNED W16 A10 ALC EXT Cable Option 002 5 8 5 9 W17 NOT ASSIGNED W18 LO Sweep coax 97 5 8 W19 Second IF Out coax 83 Option 001 5 75 7 W20 Zero Span Video coax 6 5 4 W21 NOT ASSIGNED W22 10 MHz Freq Count coax 0 5 4 5 7 W23 Ext...

Page 271: ... J6 Option 002 5 9 W48 A10 600 MHz coax 80 Option 002 5 7 W49 OCXO 10 MHz output coax 82 5 7 W50 OCXO power part of A21 OCXO assembly 5 7 W51 10 MHz IN coax 84 5 5 5 7 W52 CAL Oscillator Out coax 9 5 6 W53 Frequency Counter coax 1 5 4 5 5 W54 Video coax 2 5 4 5 5 W55 Audio Out 5 5 5 6 W56 Semirigid coax A8J2 to FL2J1 5 9 W57 Semirigid coax FL2J2 to A13J1 5 9 W58 ALT SWEEP OUT coax 8 5 8 W59 FADC c...

Page 272: ...Chapter 5 271 Major Assembly and Cable Locations Introduction Figure 5 2 Top View A2 and A3 Unfolded EC Series ...

Page 273: ...272 Chapter5 Major Assembly and Cable Locations Introduction Figure 5 3 Top View A2 A3 A4 and A5 Unfolded EC Series ...

Page 274: ...Chapter 5 273 Major Assembly and Cable Locations Introduction Figure 5 4 Top View A2 Unfolded E Series ...

Page 275: ...274 Chapter5 Major Assembly and Cable Locations Introduction Figure 5 5 Top View A2 and A3 Unfolded E Series ...

Page 276: ...Chapter 5 275 Major Assembly and Cable Locations Introduction Figure 5 6 Top View A2 A3 A4 and A5 Unfolded E Series ...

Page 277: ...276 Chapter5 Major Assembly and Cable Locations Introduction Figure 5 7 Bottom View A15 Unfolded ...

Page 278: ...Chapter 5 277 Major Assembly and Cable Locations Introduction Figure 5 8 Bottom View A15 and A14 Unfolded ...

Page 279: ...278 Chapter5 Major Assembly and Cable Locations Introduction Figure 5 9 Front End ...

Page 280: ...Chapter 5 279 Major Assembly and Cable Locations Introduction Figure 5 10 Rear View EC Series Figure 5 11 Rear View E Series ...

Page 281: ...280 Chapter5 Major Assembly and Cable Locations Introduction ...

Page 282: ...281 6 General Troubleshooting ...

Page 283: ...oses high voltage points that may if contacted cause personal injury Maintenance and repair of this instrument should therefore be performed only by a skilled person who knows the hazards involved Where maintenance can be performed without power applied the power should be removed When any repair is completed be sure that all safety features are intact and functioning and that all necessary parts ...

Page 284: ...jacks The following mnemonics are used MS measured signal TA test and adjustment Module address line and OS output signal Test jack test points are identified on block diagrams by both the jack pin number and line name Ribbon Cables Ribbon cables are used extensively in the spectrum analyzer The following five cables use different pin numbering methods on the jacks signal names remain the same but...

Page 285: ...284 Chapter6 General Troubleshooting Introduction Figure 6 1 Assembly Test Points ...

Page 286: ...Chapter 6 285 General Troubleshooting Introduction Figure 6 2 Ribbon Cable Connections 1 of 3 ...

Page 287: ...286 Chapter6 General Troubleshooting Introduction Figure 6 3 Ribbon Cable Connections 2 of 3 ...

Page 288: ... Ribbon Cable Connections 3 of 3 EC Series Only Figure 6 4 shows A2J8 connections on 8560 EC Series Instruments Lines 2 5 and 42 44 supply 5V to the two LCD backlights Lines 1 and 41 supply 5V to the A17A1 Inverter board Lines 1 6 and 41 44 are identical on A17J1 ...

Page 289: ...ed from the factory in the WR PROT write protect position jumper on pins 2 and 3 When the jumper is set to the WR ENA write enable position jumper on pins 1 and 2 an additional service cal data menu is displayed under CAL Figure 6 5 on page 289 illustrates those areas of the service cal data menu that are available ...

Page 290: ...Chapter 6 289 General Troubleshooting Introduction Figure 6 5 Service Cal Data Menu ...

Page 291: ... the controller section cannot be seen on a blank display use the following BASIC program to read these errors over HP IB If the program returns an error code of 0 there are no errors 10 DIM Err 128 20 OUTPUT 718 ERR 30 ENTER 718 Err 40 PRINT Err 50 END a If there is no response over HP IB set an oscilloscope to the following settings Sweep time ms div Amplitude scale 1 V div b The signals at A2J2...

Page 292: ...V module Chapter 12 Display Power Supply Section A7 1ST LO dist ampl Chapter 10 Synthesizer Section A8 low band mixer Chapter 11 RF Section A9 input attenuator Chapter 11 RF Section A10 tracking generator Chapter 11 RF Section A11 YTO Chapter 10 Synthesizer Section A13 2nd converter Chapter 11 RF Section A14 frequency control Chapter 10 Synthesizer Section Chapter 11 RF Section A15 RF assembly Cha...

Page 293: ...following when using the TAM Be sure the spectrum analyzer power is turned off when installing or removing the TAM Use the LP softkey found in all menus for useful information Pressing MODULE will return you to the main menu of the TAM The TAM acts as the active controller on the HP IB bus No other active controller should be connected to the bus Diagnostic Functions The TAM provides the three dia...

Page 294: ...tage placed onto one measured signal line MSL pin indicates design changes The TAM must be plugged into the revision connector first to determine which tests to use for the assembly If the revision connector has not been probed a message will appear instructing you to connect the probe to the revision connector and press TEST You can then probe the rest of the assembly connectors NOTE If the revis...

Page 295: ...s less than 2 minutes to complete if no failures are found AFI performs checks of five functional areas in a pre defined sequence The sequence minimizes the chance of making false assumptions The TAM checks the spectrum analyzer from the inside out For example the ADC is checked before the IF is checked This ensures that if no signal is detected through the IF the fault is in the IF section and no...

Page 296: ...he signal is undetected the TAM repeats the test with a signal originating from the RF section Presence of this signal through the IF indicates a faulty cal oscillator LO Control Check The LO control check verifies test that all phase lock loops PLLs in the synthesizer section lock Some oscillators are checked to ensure that they will lock outside their normal operating frequency range The TAM als...

Page 297: ...connected press Print Page to provide a hard copy of the currently displayed screen the softkey labels will not be printed Each test connector has fifteen pins one pin is missing to act as a key The pins contain eight measured signal lines measured signal lines denoted as MS1 through MS8 one input signal line OS1 one ground and five pins encoding a five bit connector address The TAM needs to probe...

Page 298: ...4 kHz 2 kHz The cal oscillator troubleshooting mode sends the cal oscillator output 35 dBm to the A5 IF assembly On the A5 IF assembly all crystal filter poles are shorted all LC poles enabled and the 15 dB attenuator disabled Signals from the RF section are attenuated as much as possible ...

Page 299: ...and RF Hardware Firmware Failures 300 to 399 YTO Loop Errors 300 to 301 Roller PLL Errors 302 to 316 YTO Loop Errors 317 to 318 Roller Oscillator Errors 321 to 329 YTO Loop Error 331 600 MHz Reference Loop 333 YTO Leveling Loop 334 Sampling Oscillator 335 Span Accuracy Calibration Errors 356 to 361 10 MHz Reference 336 Fractional N PLL 337 YTO Loop Settling Errors 351 to 354 Sampling Oscillator 35...

Page 300: ...o scroll through any other error messages which might exist making note of each error code Error Message Elimination When an error message is displayed always perform the following procedure 1 Press SAVE and SAVE STATE 2 Store the current state in a convenient STATE register It may be necessary to set SAVELOCK to OFF 3 Press CAL and REALIGN LO IF Wait for the sequence to finish 4 Press RECALL and ...

Page 301: ...11 ARGMTS Command does not have enough arguments 112 CMD Unrecognized command 113 FREQ NO Command cannot have frequency units 114 TIME NO Command cannot have time units 115 AMPL NO Command cannot have amplitude units 116 UNITS Unrecognizable units 117 NOP NUM Command cannot have numeric units 118 NOP EP Enable parameter cannot be used 119 NOP UPDN UP DN are not valid arguments for this command 120...

Page 302: ... 142 BAD ARG Query expected for FDIAG command 143 NO PRESL No preselector hardware to use command with 144 COUPL Invalid COUPLING argument expected AC or DC ADC Errors 200 to 299 These errors are directly related to the ADC interface section Suspect a faulty A2 controller A3 interface assembly or in 8560 E series analyzers the A16 fast ADC FADC assembly Option 007 Errors 202 through 207 apply only...

Page 303: ... range 251 NO IRQ Microprocessor not receiving interrupt from ADC LO and RF Hardware Firmware Failures 300 to 399 YTO Loop Errors 300 to 301 These errors often require troubleshooting the A14 frequency control assembly synthesizer section or the ADC circuits 300 YTO UNLK YTO first LO phase locked loop is unlocked The ADC measures YTO_ERR voltage under phase lock condition 301 YTO UNLK YTO first LO...

Page 304: ... if this cannot be accomplished This error is not applicable to HP 8560 E series or EC series spectrum analyzers If it occurs in an HP 8560 E series or EC series spectrum analyzer suspect a problem with the model number identification in the spectrum analyzer firmware 304 ROL UNLK Main roller oscillator PLL is unlocked May indicate loss of 10 MHz reference The 10 MHz reference should measure great...

Page 305: ...ttempts to find pretuned DAC values by programming the PLL to 25 different frequencies and incrementing the transfer oscillator pretune DAC until XFRSENSE changes polarity ERR 307 is set if the DAC is set to 255 maximum before XFRSENSE changes polarity This error is not applicable to HP 8560 E series or EC series spectrum analyzers If it occurs in an HP 8560 E series or EC series spectrum analyzer...

Page 306: ...AC set to 255 The main roller pretune DAC is set to 5 causing MAINSENSE to go to the positive rail The DAC is incremented until MAINSENSE changes polarity ERR 311 is set if the DAC is set to 255 before MAINSENSE changes to a negative polarity This error is not applicable to HP 8560 E series or EC series spectrum analyzers If it occurs in an HP 8560 E series or EC series spectrum analyzer suspect a...

Page 307: ... span calibration Troubleshoot any unlocks before attempting to troubleshoot span calibration problems because the loops must all lock in order to perform the calibration If LO spans greater than 1 MHz are correct check A14U114B A14U115A A14U116 or A14Q101 This error message appears when the roller span attenuator DAC is out of range This DAC value is recalculated each time there are changes to th...

Page 308: ...he YTO coarse tune DAC is near its limits 320 WARN FIN The YTO fine tune DAC is near its limits Roller Oscillator Errors 321 to 329 These errors indicate a faulty roller oscillator on the A14 frequency control assembly Refer to Chapter 10 The A3 interface ADC circuits may also be faulty If error codes 333 and 499 are also present suspect the 10 MHz reference the A21 OCXO or the A15 assembly Option...

Page 309: ...cation in the spectrum analyzer firmware 325 FREQ ACC Unable to adjust MAINSENSE to 0 volts using the fine adjust DAC The coarse adjust and fine adjust DAC are used together to set MAINSENSE to 0 volts with the loop opened ERR 325 is set if the fine adjust DAC cannot bring MAINSENSE to 0 volts This error is not applicable to HP 8560 E series or EC series spectrum analyzers If it occurs in an HP 85...

Page 310: ...the coarse adjust DAC is set to two different values and the MAINSENSE voltage is measured at each setting ERR 329 is set if the difference between these voltages is 0 or negative This is typically because the main roller loop is unlocked This error is not applicable to HP 8560 E series or EC series spectrum analyzers If it occurs in an HP 8560 E series or EC series spectrum analyzer suspect a pro...

Page 311: ...his error indicates an unlocked sampling oscillator also known as the offset lock loop 335 SMP UNLK Sampling oscillator PLL is unlocked ERR 335 is set if OFL_ERR is outside its prescribed limits 10 MHz Reference 336 This message occurs during the internal IF calibration routines The routine locks the cal oscillator to the internal 10 MHz reference regardless of the setting of INT EXT REF 336 10 MH...

Page 312: ...LO IF realignment routines Span accuracy calibration sweeps occur during the retrace dead time of the main sweep ramp The firmware then detects any span accuracy calibration errors These errors only apply to firmware revisions 931216 and later 356 SPAC CAL Sweep data problem finding bucket 1 of the span accuracy calibration sweep This error indicates a possible failure of the sweep generator span ...

Page 313: ... codes are generated when the automatic IF adjustment routine detects a fault This routine first adjusts amplitude parameters then resolution bandwidths in this sequence 300 kHz 1 MHz 2 MHz 100 kHz 30 kHz 10 kHz 3 kHz 1 kHz 300 Hz 100 Hz 30 Hz 10 Hz 3 Hz and 1 Hz The routine restarts from the beginning if a fault is detected Parameters adjusted after the routine begins but before the fault is dete...

Page 314: ...US AMPLITUDE the cal oscillator on A4 might not be providing the correct output signal Perform the following steps 1 Disconnect W30 white from A5J4 2 Connect W30 to the input of a second spectrum analyzer and set its controls as follows Center Frequency 10 7 MHz Reference Level 30 dBm 3 Observe the spectrum analyzer display while pressing FULL IF ADJ on the spectrum analyzer If a 35 dBm signal doe...

Page 315: ...18 RBW 3K Unable to adjust 3 kHz resolution bandwidth in second crystal pole 419 RBW 3K Unable to adjust 3 kHz resolution bandwidth in third crystal pole 420 RBW 3K Unable to adjust 3 kHz resolution bandwidth in fourth crystal pole 421 RBW 10K Unable to adjust 10 kHz resolution bandwidth in first crystal pole 422 RBW 10K Unable to adjust 10 kHz resolution bandwidth in second crystal pole 423 RBW 1...

Page 316: ...litude low in fourth crystal pole 438 RBW 1K 1 kHz resolution bandwidth amplitude low in first crystal pole 439 RBW 1K 1 kHz resolution bandwidth amplitude low in second crystal pole 440 RBW 1K 1 kHz resolution bandwidth amplitude low in third crystal pole 441 RBW 1K 1 kHz resolution bandwidth amplitude low in fourth crystal pole 442 RBW 3K 3 kHz resolution bandwidth amplitude low in first crystal...

Page 317: ... gain stage 460 AMPL Unable to adjust first step gain stage 461 AMPL Unable to adjust second step gain stage 462 AMPL Unable to adjust second step gain stage 463 AMPL Unable to adjust third step gain stage 464 AMPL Unable to adjust third step gain stage 465 AMPL Unable to adjust third step gain stage 466 LIN AMPL Unable to adjust linear amplifier scale 467 AMPL Unable to adjust step gain amplifier...

Page 318: ...le to adjust 100 Hz resolution bandwidth 491 RBW 300 Unable to adjust resolution bandwidths less than 300 Hz Crystal sweep gain problem 492 RBW 300 Unable to adjust 300 Hz resolution bandwidth Crystal sweep gain problem 493 RBW 1K Unable to adjust 1 kHz resolution bandwidth Crystal sweep gain problem 494 RBW 3K Unable to adjust 3 kHz resolution bandwidth Crystal sweep gain problem 495 RBW 10K Unab...

Page 319: ...cillator from adjusting the 1 MHz or 30 kHz through 300 kHz bandwidths This symptom implies a failure in the oscillator function block X See the A4 log amp cal oscillator schematic sheet 4 of 4 The oscillator is unable to tune the required frequency range with the 9 V to 9 V control voltage Troubleshoot A4CR802 most probable cause L801 C808 C809 and U807 500 AMPL 30K Unable to adjust amplitude of ...

Page 320: ... crystal bandwidth calibration 515 RBW 3K Unable to adjust 3 kHz resolution bandwidth Insufficient gain during crystal bandwidth calibration 516 RBW 10K Unable to adjust 10 kHz resolution bandwidth Insufficient gain during crystal bandwidth calibration 517 RBW 100 Unable to adjust 100 Hz resolution bandwidth Crystal sweep problem 518 RBW 300 Unable to adjust 300 Hz resolution bandwidth Crystal swe...

Page 321: ...ng data sampling narrow bandwidth chunk 534 RBW 300 Unable to do frequency count of CAL OSC using IF down converter when adjusting resolution bandwidths less than 300 Hz 535 RBW 300 Unable to obtain adequate FM demod range to measure 500 Hz IF filter with resolution bandwidths less than 300 Hz 536 RBW 300 Unable to auto range chirp signal while setting VCXO or doing flatness calibration with resol...

Page 322: ... in second step gain 563 LOG AMPL Unable to adjust amplitude of log scale Possible problem in third step gain range 564 LOG AMPL Unable to adjust amplitude of log scale 565 LOG AMPL Unable to adjust amplitude of log scale 566 LOG AMPL Unable to adjust amplitude of log scale 567 LOG AMPL Unable to adjust amplitude of log scale Possible problem in Log offset Log Expand stage 568 LOG AMPL Unable to a...

Page 323: ...eep rate Test the 100 kHz resolution bandwidth filter 3 dB bandwidth as follows 1 Connect the CAL OUTPUT signal A4J8 to the INPUT 50 Ω 2 Press PRESET and set the controls as follows CENTER FREQ 300MHz SPAN 500kHz Resolution Bandwidth 100kHz LOG dB DIV 1dB REF LEVEL adjust to place signal peak at top of the screen 3 Press PEAK SEARCH and MARKER DELTA and turn the knob clockwise to position the mark...

Page 324: ...e A4 log amp cal oscillator assembly 583 RBW 30K Unable to adjust 30 kHz resolution bandwidth 584 RBW 100K Unable to adjust 100 kHz resolution bandwidth 585 RBW 300K Unable to adjust 300 kHz resolution bandwidth 586 RBW 1M Unable to adjust 1 MHz resolution bandwidth 587 RBW 30K Unable to adjust 30 kHz resolution bandwidth 588 RBW 100K Unable to adjust 100 kHz resolution bandwidth 589 RBW 300K Unab...

Page 325: ...rs over HP IB Refer to Troubleshooting to a Functional Section in this chapter The EEROM on A2 is used to store data for frequency response correction elapsed time focus and intensity levels Error codes from 700 to 703 indicate that some part of the data in EEROM is invalid An EEROM error could result from either a defective EEROM or an improper sequence of storing data in EEROM Check the EEROM wi...

Page 326: ...found replace it with another ROM with the same HP part number Refer to Chapter 4 Replaceable Parts Although some of these errors might result in a blanked display it is possible to read these errors over HP IB Refer to Troubleshooting to a Functional Section in this chapter 705 ROM U306 Checksum error of program ROM A2U306 706 ROM U307 Checksum error of program ROM A2U307 707 ROM U308 Checksum er...

Page 327: ...torage Problems in Chapter 9 718 BATTERY Nonvolatile RAM not working check battery BT1 This error can also be generated if the battery has been disconnected then reconnected If this is the cause cycling power clears the error Model Number Error 719 If this error occurs return the instrument to a service center for repair 719 MODEL Could not read ID string from EEROM A2U501 System Errors 750 to 759...

Page 328: ...on modules such as the HP 85629 test and adjustment module and the HP 85620A mass memory module Refer to the option module manual for a listing of error messages User Generated Errors 900 to 999 These error codes indicate user generated errors 900 TG UNLVL Tracking generator output is unleveled 901 TGFrqLmt Tracking generator output unleveled because START FREQ is set below tracking generator freq...

Page 329: ...OVENCOLD error is indicative of a bandwidth 1 kHz not getting calibrated 908 BW SPCG Channel bandwidth is too wide compared to the channel spacing for a meaningful adjacent channel power computation 909 SPANACP The frequency span is too small to obtain a valid adjacent channel power ACP measurement 910 SPAN ACP The frequency span is too wide compared to the channel bandwidth to obtain a valid adja...

Page 330: ...The spectrum analyzer is comprised of the six main sections listed below See Figure 6 6 on page 330 The following descriptions apply to the Simplified Block Diagram and Overall Block Diagram located at the end of this chapter Assembly level block diagrams are located in Chapters 7 through 12 ...

Page 331: ...330 Chapter6 General Troubleshooting Block Diagram Description Figure 6 6 Functional Sections ...

Page 332: ...p converts the RF input to a first IF of 3 9107 GHz A13 second converter down converts the 3 9107 GHz IF to an IF of 310 7 MHz A third conversion on the A15 RF assembly down converts the second IF to the 10 7 MHz third IF A fourth conversion on the A4 log amplifier assembly down converts the third IF to the 4 8 kHz fourth IF used only in resolution bandwidths 100 Hz A7 LODA The A7 LODA LO distribu...

Page 333: ... Bandpass filters remove unwanted harmonics of the 600 MHz driving signal First IF and 2nd LO signals are filtered by cavity filters Second IF Distribution Amplifier part of A15 The second IF distribution amplifier SIFA amplifies and filters the second IF Option 001 instruments provide the pre filtered signal at the rear panel 2ND IF OUTPUT The external mixing input from the front panel IF INPUT c...

Page 334: ...the spectrum analyzer at the start frequency during the retrace of the sweep then sweeping through the desired frequency range in an unlocked condition The sweep ramp which sweeps the LO during the roll part of the lock and roll process is generated on the A14 frequency control assembly It is applied to either A11 YTO main coil or the A11 YTO FM coil For LO spans 2 0 MHz the YTO PLL remains locked...

Page 335: ...L produces the first LO of the instrument 3 0 to 6 81 GHz The YTO output is mixed with a harmonic of the sampling oscillator in the sampler A15U100 and the resulting frequency is phase locked to the output of the fractional N PLL The A15U100 sampler mixes the LO signal from the A7 LODA with a harmonic of the sampling oscillator The mixing product the sampler IF is between 60 and 96 MHz same freque...

Page 336: ...e to one relationship in frequency tracking exists between the fractional N PLL and the YTO A change of 1 MHz in the fractional N PLL will produce a 1 MHz change in the YTO frequency IF Section The IF section processes the 10 7 MHz output of the RF section and sends the detected video to the ADC interface section The following major assemblies are included in this section A3 interface assembly A4 ...

Page 337: ...M demodulator and down conversion to 4 8 kHz for digital resolution bandwidths of 1 Hz through 100 Hz The cal oscillator which is part of A4 supplies the stimulus signal for automatic IF adjustments Normally the oscillator operates only during retrace for a few milliseconds to adjust part of the IF All IF parameters will be re adjusted approximately every five minutes With continuous IF adjust on ...

Page 338: ...ace assembly A1A1 keyboard and A1A2 RPG front panel knob The A3 assembly includes log expand video filter peak detector track and hold real time DACs RF gain DACs 10 V reference and ADC circuitry The digital section includes ADC ASM sweep trigger keyboard interface RPG interface and analog bus interface circuitry ADC The HP 8560E EC spectrum analyzer can digitize signals with either the main ADC o...

Page 339: ...ast ADC is used the 5 dB div scale is derived by amplifying the video signal by two The 1 dB div scale is derived by either multiplying the 2 dB div trace data by two main ADC or amplifying the video signal by two fast ADC The spectrum analyzer uses two types of video filters An RC low pass circuit provides 300 Hz to 3 MHz video bandwidths Video bandwidths of 1 Hz to 100 Hz are generated using dig...

Page 340: ...nnector on the A2 controller assembly All six RAM ICs there are only four RAM ICs on newer A2 controller assemblies are battery backed The battery backed RAM stores trace information two display memory RAMs and spectrum analyzer state information two program RAMs A total of eight traces and ten states may be stored Typical battery life is five years with the lithium battery Trace and state informa...

Page 341: ...esolution A connector for an external VGA is available at the rear panel The A17A1 backlight supply provides the high voltage to supply the two backlights in the LCD display The LCD display is not adjustable The display driver board consists of the Hitatchi 7707 processor an Actel FPGA DRAM SRAM a filter circuit and a video DAC This board monitors the 8560 EC series controller board copies display...

Page 342: ...Chapter 6 341 General Troubleshooting Block Diagram Description Figure 6 8 Simplified Block Diagram Replace with sj13c ...

Page 343: ...342 Chapter6 General Troubleshooting Block Diagram Description ...

Page 344: ...Chapter 6 343 General Troubleshooting Block Diagram Description Figure 6 9 Overall Block Diagram 1 of 5 Replace with sj131c ...

Page 345: ...344 Chapter6 General Troubleshooting Block Diagram Description ...

Page 346: ...Chapter 6 345 General Troubleshooting Block Diagram Description Figure 6 9 Overall Block Diagram 2 of 5 Replace with sj132c ...

Page 347: ...346 Chapter6 General Troubleshooting Block Diagram Description ...

Page 348: ...Chapter 6 347 General Troubleshooting Block Diagram Description Figure 6 9 Overall Block Diagram 3 of 5 Replace with sj135c ...

Page 349: ...348 Chapter6 General Troubleshooting Block Diagram Description ...

Page 350: ...Chapter 6 349 General Troubleshooting Block Diagram Description Figure 6 9 Overall Block Diagram 4 of 5 Replace with sj133c ...

Page 351: ...350 Chapter6 General Troubleshooting Block Diagram Description ...

Page 352: ...Chapter 6 351 General Troubleshooting Block Diagram Description Figure 6 9 Overall Block Diagram 5 of 5 Replace with sj134c ...

Page 353: ...352 Chapter6 General Troubleshooting Block Diagram Description ...

Page 354: ...353 7 ADC Interface Section ...

Page 355: ...ly Video Circuits Log Offset Log Expand page 371 Video MUX page 372 Video Filter page 372 Video Filter Buffer Amplifier page 374 Positive Negative Peak Detectors page 374 Peak Detector Reset page 376 Rosenfell Detector page 377 ADC MUX page 378 Variable Gain Amplifier VGA page 380 Track and Hold page 380 A3 Assembly ADC Circuits page 381 ADC Control Signals page 381 ADC Start Stop Control page 382...

Page 356: ... GND 2 2 49 2 2 D1 3 3 48 3 3 D2 4 4 47 4 4 D3 5 5 46 5 5 D4 6 6 45 6 6 D GND 7 7 44 7 7 D5 8 8 43 8 8 D6 9 9 42 9 9 D7 10 10 41 10 10 A0 11 11 40 11 11 D GND 12 12 39 12 12 A1 13 38 13 13 A2 14 37 14 14 A3 15 15 36 15 15 A4 16 35 16 16 D GND 17 17 34 17 17 A5 18 33 18 A6 19 32 A7 20 31 20 D GND 21 21 30 21 21 LRF_STB 22 22 LFC_STB 23 23 LIF_STB 24 27 CAL OSC TUNE 25 25 LLOG_STB 26 26 VCMON 27 D G...

Page 357: ...38 38 LVFC_ ENABLE 39 39 FC ERR 40 40 A GND 41 41 10 41 41 YTO ERR 42 42 10V REF 43 43 43 A GND 44 44 7 44 44 SCAN RAMP 45 45 VIDEO TRIGGER 46 A GND 47 47 4 47 47 NC R T DAC2 49 R T DAC1 50 50 Indicates signal source Table 7 1 W2 Control Cable Connections Signal A3J2 pins A4J2 pins A5J2 pins A14J2 pins A15J2 pins ...

Page 358: ...olation result from either a shorted W2 control cable or faulty A3 assembly Perform the following steps to determine the cause of the error 1 Disconnect W2 from A3J2 and repeat the Automatic Fault Isolation procedure 2 If the analog data bus error is still present troubleshoot the A3 Interface assembly If the error disappears look for a short on W2 or another assembly connecting to it 3 To isolate...

Page 359: ...d Interface Keyboard RPG Problems Check Negative Peak Detector Positive Negative Peak Detectors steps 3 through 10 Check Peak Detector Reset Peak Detector Reset Check Positive Peak Detector Positive Negative Peak Detectors steps 3 through 10 Check Real Time DAC Preselector Peaking Control Real Time DAC Check Ramp Counter Ramp Counter Check RF Gain DACs Band Flatness Control RF Gain DACs Check Rose...

Page 360: ...al Lines A3J105 Video Input to Interface MS1 Video to Rear Panel MS1 MS2 Video MUX MS1 MS3 LOG Offset LOG Expand MS1 MS3 Video Filter Buffer Amp MS3 MS5 OS1 Video Peak Detectors MS5 MS6 ADC MUX MS6 Variable Gain Amplifier MS6 MS7 Track and Hold MS7 MS8 A3J400 Revision MS2 Trigger MS8 ADC Start Stop Control MS7 Video Trigger DAC MS1 Real Time DAC 1 MS3 RF Gain DACs MS6 ...

Page 361: ...60 2 If an entire row or column of keys does not respond and the RPG does respond there might be an open or shorted wire in A1A1W1 3 Check that all inputs to NAND gate A3U607 LKSNS lines are high when no key is pressed If any input is low continue with the following a Disconnect A1A1W1 from A3J602 and again check all inputs to U607 b If any input is low with A1A1W1 disconnected suspect A3U604 A3U6...

Page 362: ... output on U608B Clockwise RPG rotation results in a low output from U608B U612A provides the edge to trigger one shot U423B which generates a 90 ms pulse This pulse gates U610A for counting of RPG pulses by U606 Gates U610D and U614D prevent retriggering of U423B until its 90 ms pulse has timed out NOTE Elsewhere RPG_COUNT1 is referred to as RPG_01 and RPG_COUNT is referred to as RPG_02 1 Monitor...

Page 363: ...r narrow low going pulses approximately every 90 ms 12 If HRPG_IRQ and LKBD RPG_IRQ are correct but LRPG_RESET is incorrect suspect a failure on the A2 controller assembly 13 Check U610 pin 3 for a 7 8 kHz square wave Check U606 pin 2 HRPG_RESET for narrow high going pulses approximately every 90 ms Refer to Table 7 5 on page 362 and check the frequencies at divide by 16 counter A3U606 14 If all t...

Page 364: ...Output 0 from pin 10 of A3U617 generates the gate delay and output 1 from pin 13 of A3U617 generates the gate length The duration of these two time intervals is set using front panel softkeys under the SWEEP key The trigger input for Gated Video is the rear panel EXT GATE TRIG INPUT TTL 10 kΩ 1 Check that the trigger MUX is receiving the proper trigger source information by selecting each of the f...

Page 365: ...ect trigger pulses are present at the trigger MUX output A3U613 pin 7 but the instrument does not appear to be sweeping proceed as follows a Press PRESET SWEEP and DLY SWP ON OFF until ON is underlined then DLY SWP 30 milliseconds b Using an oscilloscope check for activity at pins 1 and 3 of A3U615A c If there is activity at pin 1 but not at pin 3 of A3U615A suspect A3U616 or A3U617 d If there is ...

Page 366: ...EBASE 50 ms div CHAN CHANNEL 1 2 3 4 off on CHANNEL 1 on set V div to 0 2 V and offset to 0 6 V 10 1 probe used CHANNEL 4 on set V div to 2 V and offset to 0 V DISPLAY DISPLAY norm avg env highlightnorm g Using a 10 1 probe connected to channel 1 of the oscilloscope check for activity at pins 10 and 13 of A3U617 h If either pin or both show no activity check for activity at pin 21 LTIMER of A3U617...

Page 367: ...UX CTRL INTERNAL MIXER and PRESEL MAN ADJ 4 Monitor the DVM reading while changing the PRESELECTOR TUNE value from 0 to 255 The PRESELECTOR TUNE value is the setting of R T DAC1 5 Check that the DVM reading increases from 0 to approximately 10 Vdc as R T DAC1 is set from 0 to 255 6 If the voltage does not change as described set the spectrum analyzer to single trigger mode and check the following ...

Page 368: ...ss CAL MORE 1 OF 2 SERVICE CAL DATA FLATNESS and FLATNESS DATA Press NEXT BAND until FLATNESS BAND 0 is displayed 3 Press the key until DATA 300 MHz is displayed Note the number directly underneath DATA 300 MHz this is the RF Gain DAC value 4 Connect a positive DVM lead to A3J400 pin 13 and the negative DVM lead to A3TP4 5 Check that the DVM reading increases from near 0 Vdc to between 1 3 and 1 9...

Page 369: ...368 Chapter7 ADC Interface Section Flatness Control RF Gain DACs 8 Place the WR PROT WR ENA jumper on the A2 controller assembly in the WR PROT position Press PRESET ...

Page 370: ...g division 10 dB div 4 If a trace is displayed troubleshoot the A3 assembly If a trace is absent connect an oscilloscope to the rear panel BLKG GATE OUTPUT 5 The presence of a TTL signal TTL low during 20 ms sweep indicates a good A3 Interface Assembly Troubleshoot the IF section 6 If the BLKG GATE OUTPUT is always at a TTL high or low troubleshoot the A3 trigger video gating circuits 7 Reconnect ...

Page 371: ...100 mV per 10 dB step refer to Video Filter in this chapter 17 If the voltage at A3TP15 is correct move the oscilloscope probe to A3TP17 and step the reference level between 10 dBm and 30 dBm If the voltage does not change 100 mV per 10 dB step refer to Video Filter Buffer Amplifier in this chapter 18 If the voltage at A3TP17 is correct move the oscilloscope probe to A3TP6 Set the following contro...

Page 372: ...eo signal The 0 8 V offset is accomplished by sinking 2 mA through R114 by current source U105 Q101 1 On the HP 8560E EC press PRESET SPAN ZERO SPAN CAL and IF ADJ OFF 2 Disconnect W26 coax 2 from A3J101 and connect the output of a function generator to A3J101 3 Set the function generator to the following settings Output Sine wave Amplitude 1 V pk to pk DC Offset 500 mV Frequency 50 Hz 4 Set the H...

Page 373: ... A3U104 pins 3 and 11 while switching between 10 dB div and 2 dB div c If the logic signals are incorrect refer to Analog Bus Timing and Analog Bus Drivers in this chapter 5 Check comparators A3U109A C for proper outputs The outputs should be high when the noninverting input is greater than the threshold voltage of 1 3 Vdc 6 If A3U104 and A3U109 are working properly set the AMPLITUDE and REF LVL t...

Page 374: ...e mode or level mode can be selected from the front panel 1 Press PRESET and set the HP 8560E EC controls to the following settings Center frequency 225 MHz Span 550 MHz Sweep time Uncoupled MAN 2 Press CAL and IF ADJ OFF 3 Step the Video BW from 3 MHz to 10 kHz At each step the peak to peak deviation of the noise should decrease 4 Step the Video BW down to 1 Hz At each step the amplitude of the L...

Page 375: ...inates the peak detector inputs in 500 ohms The unterminated gain is 1 1 Diode CR114 prevents latchup during positive overdrive conditions while CR113 protects Q318 during overdrive Diode CR117 is a 12 7 V zener that limits the peak detector output to 1 5 V Typically limiting occurs at 1 1 V Positive Negative Peak Detectors Refer to function blocks Y and Z of A3 Interface Assembly Schematic Diagra...

Page 376: ...o peak deviation of the noise in NORMAL detector mode should be approximately two divisions Press TRACE TRACE B CLEAR WRITE B VIEW B TRACE A MORE 1 of 3 and DETECTOR MODES b Select DETECTOR POS PEAK mode c Confirm that the noise is about one third division peak to peak The noise should also be no higher than the top of the noise level in NORMAL detector mode d Select DETECTOR NEG PEAK mode The noi...

Page 377: ...etector Reset Refer to function block R of A3 Interface Assembly Schematic Diagram sheet 4 of 6 in the HP 8560 E Series Spectrum Analyzer Component Level Information 1 Press PRESET on the HP 8560E EC and set the controls as follows Center frequency 300 MHz Span 0 Hz Sweep time 5 s Detector mode POS PEAK 2 Check that HHOLD A3U526 pin 11 has 18 µs wide pulses every 128 µs 3 Check that HODD U408 pin ...

Page 378: ...5 s Detector mode NORMAL 2 Check LPOS_RST and LNEG_RST as described in Peak Detector Reset 3 Check A3U423 pin 4 for two low going 3 3 µs pulses 40 µs apart occurring every 130 µs 4 Check that HROSENFELL A3U610 pin 6 has two pulses spaced approximately 40 µs apart and then a third pulse 60 µs from the second pulse Each pulse should be approximately 10 µs wide and low going 5 Monitor HROSENFELL with...

Page 379: ...UX CAL OSC TUNE and OFL ERR inputs are used only during diagnostic and auto adjust routines and during retrace 1 Set the HP 8560E EC to the following settings Center frequency 300 MHz Span 0 Hz Reference level 10 dBm Sweep time 50 s DETECTOR MODE SAMPLE 2 Refer to Table 7 9 on page 379 and check for correct logic levels at A3U108 pins 1 15 and 16 Check for proper output signals at TP6 If the selec...

Page 380: ...e to A3J400 pin 15 HSCAN b A TTL signal high during 50 ms sweep time and low during retrace should be present indicating A3 is working properly Refer to the Synthesizer section troubleshooting procedure in Chapter 10 A faulty TTL signal indicates a bad A3 Interface assembly 9 Set the HP 8560E EC to the following settings Sweep time 100 ms Span 100 MHz 10 Press CAL and IF ADJ ON and check for the p...

Page 381: ...o function block AC of A3 Interface Assembly Schematic Diagram sheet 6 of 6 in the HP 8560 E Series Spectrum Analyzer Component Level Information 1 Press PRESET on the HP 8560E EC and set the controls as follows Center frequency 300 MHz Span 0 Hz Detector mode Sample Reference level 70 dBm Log dB division 2 dB div Sweep time 50 ms 2 Disconnect any signal from the spectrum analyzer input A full sca...

Page 382: ...m sheet 2 of 6 in the HP 8560 E Series Spectrum Analyzer Component Level Information The ADC requires two signals from the A2 controller assembly HBADC_CLK0 and HBBKT_PULSE HBBKT_PULSE is used only in zero span Use the following steps to verify the signals 1 Disconnect W22 from A2J8 2 If a 10 MHz TTL signal is absent on W22 refer to the 10 MHz Reference on the A15 RF assembly troubleshooting proce...

Page 383: ...E EC to the following settings Span 1 MHz Detector mode SAMPLE 6 Check for a TTL high at A3U509 pin 2 and a TTL low at A3U509 pin 14 7 Press CAL and REALIGN LO IF During the realignment A3U509 pin 2 should be TTL low and pin 14 should be TTL high until the 10 kHz and narrower resolution bandwidths are adjusted If correct the Start Stop Control circuitry is being selected properly by the processor ...

Page 384: ...d the ADC conversion 6 Check that LDONE U506 pin 19 goes TTL low approximately 2 µs after LCMPLT goes low ADC Refer to function block A of A3 Interface Assembly Schematic Diagram sheet 2 of 6 in the HP 8560 E Series Spectrum Analyzer Component Level Information The successive approximation state machine SASM consists of A3U527 and A3U528 Upon the occurrence of HSTART_ADC the SASM successively togg...

Page 385: ...ge levels at these points are difficult to interpret Ramp Counter Refer to function block D of A3 Interface Assembly Schematic Diagram sheet 2 of 6 in the HP 8560 E Series Spectrum Analyzer Component Level Information The ramp counter is used for sweeps with widths greater than 2 0 MHz times N The analog sweep ramp is compared to the digital ramp counter When the analog sweep ramp exceeds the DAC ...

Page 386: ...cope or logic probe This is the strobe for the A15 RF Assembly 3 Press AUX CTRL and REAR PANEL and check that pulses occur when toggling between 10 MHz INT and 10 MHz EXT 4 Monitor U401 pin 5 LFC_STB with an oscilloscope or logic probe This is the strobe for the A14 frequency control assembly 5 Press AMPLITUDE and check that pulses occur when toggling between ATTEN settings of 10 and 20 dB 6 Monit...

Page 387: ... 17 Remove jumpers Analog Bus Timing Refer to function block P of A3 Interface Assembly Schematic Diagram sheet 4 of 6 in the HP 8560 E Series Spectrum Analyzer Component Level Information Analog bus timing ABT generates the strobes for the A4 A5 A14 and A15 assemblies The A14 frequency control assembly also requires a qualifier for its strobe LVFC_ENABLE A3U400 and A3U414 provide a 2 µs delay bet...

Page 388: ...een REF LVL settings of 10 dBm and 20 dBm 13 Monitor A3U401 pin 9 LV_STB with an oscilloscope or logic probe This is the strobe for the A4 log amplifier cal oscillator assembly 14 Press AMPLITUDE and check that pulses occur when toggling between LINEAR and LOG DB DIV Interface Strobe Select Refer to function block K of A3 Interface Assembly Schematic Diagram sheet 3 of 6 in the HP 8560 E Series Sp...

Page 389: ...ts Table 7 11 Demultiplexer A3U500 Truth Table Selected Output Line IA0 IA1 IA2 Pin 15 LSENSE_KBD L L L Pin 14 LINT_PRIOR H L L Pin 13 LADC_DATA1 L H L Pin 12 LDAC_DATA0 H H L Pin 11 HCNTR_LD0 L L H Pin 10 HCNTR_LD1 H L H Pin 9 LRPG_RD L H H Pin 7 LADC_REG0 H H H ...

Page 390: ...and switch U44D is closed Amplifier U43 then provides a gain of 2 Vin 1 V Voltage clamp CR4 prevents the scaled video input to amplifier U45 from going more negative than 0 35 V or more positive than 1 25 V NOTE When measuring voltages or waveforms on the A16 fast ADC assembly connect the ground or common lead to the ground plane trace on the A16 assembly This digital ground plane is totally isola...

Page 391: ...he dc level of the flash video at TP27 The level should be near 1 7 Vdc 8 Bit Flash ADC Refer to function block I of the A16 fast ADC assembly schematic diagram in the HP 8560 E Series Spectrum Analyzer Component Level Information The flash ADC U35 converts the analog video signal into 8 bit digital values at a fixed rate of 12 megasamples per second NOTE When measuring voltages or waveforms on th...

Page 392: ...t The different detection modes are implemented by selectively clocking latch U30 depending on the state of LP Q which is generated in PAL U1 block A When LP Q is low U30 is clocked by WCLK When LP Q is high U30 is not clocked LP Q is a function of the 12M_SEL SCLK 1 LSAMPLE LPEAK P_LO and P_HI signals See Table 7 12 on page 392 If the sample rate is 12 MHz 12M_SEL is high which forces LP Q low so...

Page 393: ...st ADC circuitry is in the write mode When not in the write mode the static RAM is read by the CPU on the A2 controller assembly to retrieve the fast ADC data The 8 bit Q bus connects the outputs of latch U30 to the data port of static RAM U32 Table 7 12 LP Q Truth Table Mode LP Q 12M_SEL SCLK 1 LSAMPLE LPEAK P_LO P_HI 12MHz L H X X X X X SAMPLE L X X L X X X POS L L L H L L H PEAK H L L H L H L H...

Page 394: ...fast ADC assembly can be accessed by firmware on the A2 controller assembly at two logical addresses When the address line ADDR3 is low the primary address is selected When the ADDR3 is high the secondary address is selected The data transfers between the A16 fast ADC assembly and the A2 controller assembly are clocked by the two strobe lines MSB_STRB and LSB_STRB 16 bit word transfers occur as tw...

Page 395: ...o samples being written to FADC memory FADC memory can be read by A2 controller Bit 1 ARM Arms the FADC assembly for a trigger 1 FADC assembly armed to accept trigger from HSWP line or video trigger 0 FADC assembly cannot be triggered Bit 2 GAINX2 Turns on X2 log expand amplifier 1 A16U43 turned on 5 dB div or 1 dB div scale 0 A16U43 turned off 10 dB div 2 dB div or linear scale Bit 3 VTRIG_POL Co...

Page 396: ...enabled Bit 7 LLOADPOST Enables load post trigger counter 1 Writes to the post trigger counter disabled 0 Writes to the post trigger counter enabled Bit 8 LVTRIG_EN Enables digital video trigger on A16 1 Digital video trigger disabled 0 Digital video trigger enabled Bit 9 LREADCLK Clocks counters during read mode Used to load post trigger counter or address counter Also used to post increment addr...

Page 397: ... from trigger address latch enabled Bit 12 LRATELATCH Enables load sample rate latch 1 Writes to the sample rate latch are disabled 0 Writes to the sample rate latch are enabled Bit 13 LRLSHSWP Releases HSWP strobe 1 Release HSWP strobe disabled 0 Release HSWP strobe enabled Bit 14 LLOADTRIG Enables load video trigger level 1 Load digital video trigger level disabled 0 Load digital video trigger l...

Page 398: ...ignal and generates all of the various clock signals used on the A16 fast ADC assembly The sample rate generator consists of CMOS latch U15 CMOS counters U14 and U16 and CMOS flip flops U7B and U9A The sample rate generator only controls the rate at which the static RAM address counter 15 bit circular address counter and the 16 bit post trigger counter are clocked ACLK and PCLK respectively The sa...

Page 399: ...trigger or post trigger delay is being used the CPU adds or subtracts appropriately and writes the adjusted trigger address to the static RAM counter The CPU then begins reading the fast ADC data starting from the trigger or offset trigger address The trigger circuitry is enabled by the ARM signal bit 1 of the fast ADC control word Once a trigger occurs the fast ADC cannot be triggered again until...

Page 400: ... ADC control word to their low state The CPU then writes the 16 bit load value to the CPU secondary address The rising edge of ACLK then latches the 16 bit data into the address counter After the address counter is loaded by the CPU during read mode the static RAM is read by the CPU The RAM is read by first setting LREADMEM bit 10 of the fast ADC control word and LREADCLK bit 9 of the fast ADC con...

Page 401: ...he A2 controller assembly when the fast ADC is in read mode When the sample on the Q input is higher than the video trigger level on the P input V_HI output is high and V_LO output is low When the Q input is lower than the P input V_HI output is low and V_LO output is high And when P is equal to Q both V_HI and V_LO are low These two signals V_HI and V_LO go to PAL U1 block A and are used to clock...

Page 402: ...Chapter 7 401 ADC Interface Section A16 Assembly Fast ADC Control Circuits 8560E with Option 007 Figure 7 2 A3 Interface Assembly Block Diagram Replace with sj18c ...

Page 403: ...402 Chapter7 ADC Interface Section A16 Assembly Fast ADC Control Circuits 8560E with Option 007 ...

Page 404: ...Chapter 7 403 ADC Interface Section A16 Assembly Fast ADC Control Circuits 8560E with Option 007 Figure 7 3 Fast ADC Block Diagram Option 007 in E series instruments Replace with sj139e ...

Page 405: ...404 Chapter7 ADC Interface Section A16 Assembly Fast ADC Control Circuits 8560E with Option 007 ...

Page 406: ...405 8 IF Section ...

Page 407: ...requency Counter Prescaler Conditioner page 425 AM FM Demodulator page 425 4 8 kHz IF Filters page 426 10 7 MHz IF Filters page 426 4 8 kHz and 10 7 MHz IF Filters page 427 10 6952 MHz VCXO page 428 Input Switch page 428 LO Switch page 428 Synchronous Detector page 429 Limiter page 429 Isolation Amplifier page 430 Detector Mixer page 430 Log Offset Gain Compensation page 430 Log Offset Compensatio...

Page 408: ...n Audio Amplifier and Speaker page 460 NOTE Because the cal oscillator circuitry on the A4 assembly is such an integral part of the IF adjustment always check this assembly first before checking the rest of the IF Section A faulty cal oscillator can cause many apparent faults in the rest of the IF Section ...

Page 409: ...lustrates the levels and paths through the IF Section Figure 8 1 A4 and A5 Test Connectors Table 8 1 Automatic Fault Isolation References Suspected Circuit Indicated by Automatic Fault Isolation Manual Procedure to Perform Check Cal Oscillator on A4 Assembly Troubleshooting the Cal Osc with the TAM Check Input Switch on A5 IF Assembly Troubleshooting A5 with the TAM Check Linear Amplifiers on A4 A...

Page 410: ...fset The cal oscillator on A4 is used as an input to the log amp for the purpose of measuring gains Faults in the signal path voltages indicate broken circuitry in prior stages This technique locates dead stages but might not report slightly degraded ones Both 15 V and 15 V are measured The revision code is on J11 Troubleshooting A5 with the TAM Manual Probe Troubleshooting calculates stage bias c...

Page 411: ... Osc Tune Line Test MS3 Cal Osc ALC Test MS4 Cal Osc Sweep Gen Output MS6 A4J10 Log Amp Input Switch MS1 Log Amp Limiter Bias MS2 Positive 15 V Supply MS5 A4J11 Logamp Linear Output MS2 Logamp Linear MUX Path MS2 MS3 MS8 Logamp Log Output MS3 Logamp Compensation MS3 MS4 Logamp Log MUX Path MS4 MS8 Logamp Video Offset MS8 15 Volt Supply MS7 Revision MS5 A5J6 1st Step Gain Stage 1 MS1 MS2 MS8 1st St...

Page 412: ... 3 MS3 MS4 MS5 3rd LC Pole Stage MS5 MS6 MS7 4th LC Pole Stage MS6 MS7 A5J9 IFDAC Channels A MS1 IFDAC Channels B MS3 IFDAC Channels C MS4 IFDAC Channels D MS2 Latched IF Control Lines MS5 Negative 15 V Supply MS6 5 Volt Supply MS7 10 Volt Reference MS8 Table 8 2 TAM Tests versus Test Connectors Connector Manual Probe Troubleshooting Test Measured Signal Lines ...

Page 413: ...ackages feeds into a network The TAM varies each DAC individually to isolate which ones failed Similarly 10 digitally controlled lines feed into a network and are monitored by the TAM The channels used to monitor the DACs are listed below 1 On the HP 8560E EC press PRESET MODULE and Diagnose Select Cal Osc Troubleshooting Mode 2 On the HP 8560E EC disconnect W27 coax 3 from A5J5 and monitor the ou...

Page 414: ... a second spectrum analyzer 3 Set the controls of the second spectrum analyzer connected to cable W52 to the following Span 5MHz Reference level 30 dBm Center frequency 10 7MHz 4 Select each of the fixed tuned frequencies Verify at each frequency that the signal amplitude measures 35 dBm If the frequency is incorrect do the following a Verify that the reference divider output A4U811 pin 9 is 100 k...

Page 415: ... sweep width chosen Table 8 3 on page 414 lists the RANGE MA0 and MA1 values for the sweep widths If a failure is indicated in the IF LOG CHECK press More Info to provide more detailed information about the detected failure If an HP IB printer is available connect it to the spectrum analyzer HP IB connector then press Print Page for a hard copy output Table 8 3 Sweep Width Settings Sweep Width Swe...

Page 416: ...justments and LO adjustments are made with the most recent IF parameter variables used as the starting point If FULL IF ADJ is selected All possible IF adjustments are made with the most recent IF parameter variables used as the starting point FULL IF ADJ is located in the CAL menu If ADJ CURR IF STATE is selected All amplitude data and some resolution bandwidths are adjusted The bandwidths adjust...

Page 417: ...aximum gain 4 Fine Attenuator for 32 evenly spaced DAC settings c Log Amplifier Slopes and Fidelity 1 Wideband RES BW 300 kHz through 2 MHz and Narrowband modes RES BW 300 Hz through 100 kHz 2 10 dB DIV and 2 dB DIV log expand modes d Linear Scale Gains On the log amplifier assembly P O A4 e Peak Detector Offsets both Positive and Negative Peak Detectors with respect to normal sample path used by ...

Page 418: ...th bandwidth e 300 Hz resolution bandwidth bandwidth f Gain of all resolution bandwidth relative to the 300 kHz RES BW 4 Digital Bandwidths 1 Hz through 100 Hz 10 Hz through 100 Hz if Option 103 a VCXO final LO tuned to align digital bandwidths with crystal bandwidth center frequency b Overall gain c Gain variation with input frequency Requirements For the Automatic IF Adjustment routine to work t...

Page 419: ...ment The references against which the Automatic IF Adjustment routine aligns are 10 MHz reference A15 Linear Scale Fidelity especially the 10 dB gain stage in A4 Linear Amplifier block 15 dB Reference Attenuator A5 Cal Oscillator output power A4 ...

Page 420: ...dBm is required at input A5J3 for displaying a signal at top screen with 10 dB input attenuation and a 0 dBm reference level Isolate IF gain problems on the log amplifier assembly A4 with the following steps 1 On the spectrum analyzer press PRESET SPAN ZERO SPAN FREQUENCY 1 GHz AMPLITUDE 50 dBm 2 Press CAL and IF ADJ OFF 3 Disconnect cable W27 coax 3 from A5J5 and connect cable W27 to the output o...

Page 421: ...ion bandwidth problems are a result of A5 IF assembly failures The resolution bandwidths are adjusted in the following sequence using 300 kHz as the reference 1 MHz 2 MHz 100 kHz 30 kHz 10 kHz 3 kHz 1 kHz 300 Hz 100 Hz 30 Hz 10 Hz 3 Hz and 1 Hz The 3 Hz and 1 Hz bandwidths are not available with Option 103 If the IF adjustment routine encountered an error the previously adjusted resolution bandwid...

Page 422: ...ure to do this can result in damage to the spectrum analyzer or the probe Log Amplifier Refer to function blocks K L and AE of A4 Log Amplifier Schematic Diagram in the HP 8560 E Series Spectrum Analyzer Component Level Information The log amplifier receives the detected video signal from the Detector Mixer and outputs a voltage proportional to the log of the input voltage The linear output is tap...

Page 423: ...am in the HP 8560 E Series Spectrum Analyzer Component Level Information Check this switch as follows a Monitor voltages on A4U302 pins 1 and 7 while changing the spectrum analyzer resolution bandwidth from 100 kHz to 300 kHz b If the voltages do not come within a few volts of the 15 V and 15 V supplies U103 and U302 are suspect c Disconnect the digital multimeter and reconnect W27 to A4J3 Linear ...

Page 424: ...e within one division of the previous position 5 If a problem exists isolate it by comparing the actual gain of A4U201C and A4U201E with those listed in the gain guidelines above 6 Reconnect W27 coax 3 to A4J3 Video Offset Refer to function block P of A4 log amplifier schematic diagram sheet 3 of 4 in the HP 8560 E Series Spectrum Analyzer Component Level Information The circuit provides a program...

Page 425: ...ause Video Output 1 On the spectrum analyzer press PRESET FREQUENCY 300 MHz SPAN 100 Hz AMPLITUDE 10 dBm SGLSWP CAL and IF ADJ OFF 2 Connect the CAL OUTPUT to the INPUT 50 Ω connector 3 Disconnect W54 coax 2 from A4J4 Connect a short SMB to SMB cable from A4J4 to an SMB tee and connect W54 to the tee Connect a test cable from the tee to the input of an oscilloscope 4 Set the oscilloscope controls ...

Page 426: ...atic Diagram sheet 4 of 4 in the HP 8560 E Series Spectrum Analyzer Component Level Information The demodulator circuitry on the log amplifier on A4 produces a low level audio signal This audio signal is then amplified by the audio amplifier on A4 The FM demodulator demodulates narrowband FM 5 kHz deviation signals The detector demodulates AM signals 1 If demodulation problems occur when the spect...

Page 427: ...z center frequency and 2 kHz span CAUTION If a dc block is not used damage to the HP 8566A B results The HP 8566A B and many other spectrum analyzers have dc coupled inputs and cannot tolerate dc voltages on their inputs 5 Connect the VIDEO OUTPUT rear panel of the spectrum analyzer through a 20 dB attenuator and dc block to the input of the HP 8566A B Set the sweep time of the HP 8566A B to 10 se...

Page 428: ...MHz signal at 60 dBm and connect it to A5J3 3 Fine tune the frequency of the signal generator to center the signal on the HP 8560E EC display Set the signal generator to sweep one 2 kHz span about this center frequency 4 On the HP 8560E EC press SGL SWP 5 Set the HP 8566A B to 4 8 kHz center frequency and 2 kHz span CAUTION Damage to the HP 8566A B results if a dc block is not used The HP 8566A B ...

Page 429: ...O Error message ERR 539 may occur if the VCXO is not oscillating If problems exist with the VCXO control voltage error messages ERR 536 or ERR 530 may occur Between sweeps the VCXO at times is turned off To prevent the oscillator from turning off press PRESET FREQUENCY 0 3 GHz SPAN 1 kHz SGL SWP CAL and IF ADJ OFF Input Switch Refer to function block D of A4 Log Amplifier Schematic Diagram sheet 2...

Page 430: ...4Q405 should be 180 degrees out of phase from each other If they are not 180 degrees out of phase or one of the signals are not present troubleshoot the LO Amplifier or the FETs in the mixer If the signal is not a symmetrical square wave troubleshoot the LO amplifier If the signal drops out prematurely or is not present at all troubleshoot the limiter or LO amplifier Repeat the procedure for an RB...

Page 431: ...he Detector Mixer The difference frequency produces video dc to approximately 3 MHz since the two signals are at the same frequency During digital resolution bandwidths the two signals are separated by about 4 8 kHz Log Offset Gain Compensation Refer to function blocks L and M of A4 Log Amplifier Schematic Diagram sheet 3 of 4 in the HP 8560 E Series Spectrum Analyzer Component Level Information L...

Page 432: ...ubleshoot this circuit is to look for blown FETs Bad FETs are characterized by having significant gate current Only one of the signal lines LIN_VIDEO IF_VIDEO or LOG_VIDEO should be high 15 V at any given time The others should be low 15 V Also look for a voltage drop of several volts across the gate resistors R601 R605 R609 or R613 when in either the off or on state This indicates gate current an...

Page 433: ...the front end Fixed gain amplifiers shift the signal levels to lower the noise of the IF chain The assembly has two variable attenuators The fine attenuator provides the 0 1 dB reference level steps The reference 15 dB attenuator provides a reference for automatic adjustment of the step gain amplifiers and the log amplifier The reference 15 dB attenuator also provides gain for changes in spectrum ...

Page 434: ...wer supply NOTE Some transistors have collectors connected to the case Electrical connection of the case to the collector might not be reliable making collector voltage measurements on the transistor case unreliable IF Signature 1 Disconnect W27 coax 3 from A5J5 2 Connect an SMB tee to A5J5 using a short coaxial cable with SMB connectors 3 Connect one output of the tee to cable W27 coax 3 4 Connec...

Page 435: ...nalyzer illustrated in Figure 8 3 on page 435 If the signatures do not closely resemble each other a more detailed view of the signature may show the failed hardware a Set the HP 8566A B controls as follows Sweep time 550 ms dB DIV 5 dB Reference level 5 dBm b Press SINGLE on the HP 8566A B and a very short time later press ADJ CURR IF STATE on HP 8560E EC Figure 8 4 on page 436 through Figure 8 8...

Page 436: ...Chapter 8 435 IF Section A5 IF Assembly Figure 8 3 IF Adjust Signature ...

Page 437: ...436 Chapter8 IF Section A5 IF Assembly Figure 8 4 Detailed IF Adjust Signature 1 ...

Page 438: ...Chapter 8 437 IF Section A5 IF Assembly Figure 8 5 Detailed IF Adjust Signature 2 ...

Page 439: ...438 Chapter8 IF Section A5 IF Assembly Figure 8 6 Detailed IF Adjust Signature 3 ...

Page 440: ...Chapter 8 439 IF Section A5 IF Assembly Figure 8 7 Detailed IF Adjust Signature 4 ...

Page 441: ...440 Chapter8 IF Section A5 IF Assembly Figure 8 8 Detailed IF Adjust Signature 5 ...

Page 442: ...ure 8 4 on page 436 is flat Suspect the second step gain stage Entire signature noisy If the signature resembles Figure 8 9 on page 442 suspect a broken first step gain stage or a break in the signal path in the input switch first crystal pole or second crystal pole Correct shape but noisy If the signature resembles Figure 8 10 on page 443 suspect the second crystal pole output amplifier Amplitude...

Page 443: ...442 Chapter8 IF Section A5 IF Assembly Figure 8 9 Noisy Signature ...

Page 444: ...Chapter 8 443 IF Section A5 IF Assembly Figure 8 10 Noise with Correct Shape ...

Page 445: ...444 Chapter8 IF Section A5 IF Assembly Figure 8 11 Region B Amplitude Variation ...

Page 446: ...ency 300 MHz 2 On the spectrum analyzer connect the 300 MHz CAL OUTPUT to the INPUT 50 Ω 3 If the trace flatness is not within 2 5 dB a failure probably exists 4 A trace similar to Figure 8 13 on page 446 indicates a crystal short failure 5 Press SPAN to set the spectrum analyzer to 3 MHz A trace that slopes across the screen see Figure 8 14 on page 447 indicates a failed LC pole To isolate the br...

Page 447: ...446 Chapter8 IF Section A5 IF Assembly Figure 8 13 Faulty Crystal Short ...

Page 448: ...non functioning pole with the IF signature Region E of Figure 8 8 on page 440 illustrates the four LC pole adjustments Take several signatures to examine the LC pole adjustments If one of the four sections of Region E is consistently longer than the others the corresponding LC pole is faulty IF gain compression FET transistors Q301 Q303 Q700 and Q701 can deteriorate with age Measuring less than 0 ...

Page 449: ...0 MHz 3 On the spectrum analyzer connect the 300 MHz CAL OUTPUT to the INPUT 50 Ω 4 A trace similar to Figure 8 15 on page 448 indicates a failed crystal symmetry circuit Narrow 10 kHz resolution bandwidth Check for printed circuit board contamination Clean the board as required IF Gain Compression in 10 kHz resolution bandwidth FET transistors Q202 Q203 Q501 and Q503 can deteriorate with age Meas...

Page 450: ...ect W29 coax 7 from A5J3 and W27 coax 3 from A5J5 4 Inject a 5 dBm 10 7 MHz signal into A5J3 5 Monitor the output of A5J5 with another spectrum analyzer 6 Simultaneously decrease the signal generator output and spectrum analyzer reference level in 10 dB steps down to a 50 dBm reference level 7 At each step the signal displayed on the other spectrum analyzer should be close to 10 dBm More subtle IF...

Page 451: ...width filters 30 kHz through 1 MHz Adjust 3 dB bandwidth symmetry and gain of the crystal resolution bandwidth filters 300 Hz through 10 kHz The cal oscillator uses a phase locked loop PLL The oscillator function block X is locked to the instrument 10 MHz reference The reference divider function block U divides the reference and delivers a 100 kHz TTL signal to the phase detector function block V ...

Page 452: ...onds after the instrument is turned on assuming the rest of the instrument is working correctly Immediately observe the lower right corner of the display for error messages If the message ERR499 CAL UNLK appears before errors ERR 561 ERR 562 and ERR 565 the cal oscillator is unable to phase lock Expect to see the ERR 499 message for only about 1 second 2 If the spectrum analyzer registers an unloc...

Page 453: ...36 25 dBm If the signal level is correct at both settings troubleshoot the A5 IF assembly If the signal level is incorrect continue with step 7 7 Troubleshoot the ALC loop on this assembly using the following steps a Connect a positive DVM probe to A4J9 pin 4 b On the spectrum analyzer press CAL c Press FULL IF ADJ Observe the DVM reading between the displayed messages IF ADJUST STATUS 300 kHz RBW...

Page 454: ...ble an SMB tee and an active probe may be substituted Connect the active probe between the tee and the other spectrum analyzer The absolute power levels are approximately 3 dB higher than those stated below due to the elimination of the 3 dB power splitter 4 Press INSTR PRESET on the HP 8566A B and set the controls as follows Center frequency 10 8 MHz Span 0 Hz Reference level 43 dBm Resolution ba...

Page 455: ...z Resolution bandwidth 10 kHz Video bandwidth 1 kHz Sweep time 200 ms 12 On the spectrum analyzer press FULL IF ADJ When the message IF ADJUST STATUS 1 kHz RBW appears press SINGLE on the HP 8566A B 13 Figure 8 18 on page 457 illustrates normal operation Severe failures slope error greater than 30 and subtle 3 kHz resolution bandwidth errors less than 30 indicate a problem with A4U802 U803 U804 or...

Page 456: ...Chapter 8 455 IF Section Cal Oscillator Assembly P O A4 Figure 8 16 Output Waveform 10 kHz Resolution Bandwidth ...

Page 457: ...456 Chapter8 IF Section Cal Oscillator Assembly P O A4 Figure 8 17 Output Waveform 3 kHz Resolution Bandwidth ...

Page 458: ...Chapter 8 457 IF Section Cal Oscillator Assembly P O A4 Figure 8 18 Output Waveform 1 kHz Resolution Bandwidth ...

Page 459: ...458 Chapter8 IF Section Cal Oscillator Assembly P O A4 Figure 8 19 Output Waveform 300 Hz Resolution Bandwidth ...

Page 460: ... On the spectrum analyzer press CAL 3 Press FULL IF ADJUST Observe the DVM reading between the displayed messages IF ADJUST STATUS 300 kHz RBW and IF ADJUST STATUS 3 kHz RBW During this time period the voltage should be within a 2 to 10 Vdc range 4 Observe the DVM reading while IF ADJUST STATUS AMPLITUDE is displayed The reading should be within the 2 to 10 Vdc range 5 If the DVM reading is outsid...

Page 461: ...ntegrating this ramp results in the parabolic output waveform AM FM Demodulation Audio Amplifier and Speaker Refer to function blocks R S and T of A4 Log Amplifier Schematic sheet 4 of 4 Diagram in the HP 8560 E Series Spectrum Analyzer Component Level Information If the audio circuits are not functioning use the following procedure to isolate the problem 1 Set an AM signal generator controls as f...

Page 462: ...pin 3 with an oscilloscope The signal should be 20 mV peak to peak 25 with 2 5 V of dc bias If the signal measures outside these limits the fault is prior to the audio amplifier block T 7 If the signal is correct troubleshoot the audio amplifier and speaker ...

Page 463: ...462 Chapter8 IF Section Cal Oscillator Assembly P O A4 ...

Page 464: ...Chapter 8 463 IF Section Cal Oscillator Assembly P O A4 Figure 8 21 A4 Log Amplifier Cal Oscillator Block Diagram 1 of 2 Replace with sj123e ...

Page 465: ...464 Chapter8 IF Section Cal Oscillator Assembly P O A4 ...

Page 466: ...Chapter 8 465 IF Section Cal Oscillator Assembly P O A4 Figure 8 21 A4 Log Amplifier Cal Oscillator Block Diagram 2 of 2 Replace with sj122e ...

Page 467: ...466 Chapter8 IF Section Cal Oscillator Assembly P O A4 ...

Page 468: ...Chapter 8 467 IF Section Cal Oscillator Assembly P O A4 Figure 8 22 A5 IF Assembly Block Diagram Replace with sj124e ...

Page 469: ...468 Chapter8 IF Section Cal Oscillator Assembly P O A4 ...

Page 470: ...469 9 Controller Section ...

Page 471: ... 8560E page 474 Display Problems 8560E page 475 Line Generators page 475 Blanking page 476 Display Jumbled or Trace Off Screen page 478 Intensity page 482 Bad Characters or Graticule page 483 Long Lines Dimmer than Short Lines page 483 Analog Zero Span Problems 8560E page 486 Frequency Count Marker Problems page 487 Frequency Counter page 489 State and Trace Storage Problems page 499 Keyboard Prob...

Page 472: ...ually 1 2 All of the power supply indicator LEDs along the edge of the A2 controller assembly should be lit 3 The rear panel CRT 110 VDC ON indicator might not be lit even if the 110 V is present 4 Connect the TAM probe cable to A2J11 5 Press MODULE SOFT KEY 3 and SOFT Table 9 1 TAM Tests versus Test Connectors Connector Manual Probe Troubleshooting Test Measured Signal Lines A2J11 ADC MUX Test MS...

Page 473: ...nt to the printer 9 If a failure is indicated in any of these tests the fault lies on the A2 controller assembly To obtain more information a Press the step down key one less time than the test number For example press it twice for the third test on the list b Press SOFT KEY 3 then SOFT KEY 4 and when the printout is complete SOFT KEY 6 Figure 9 1 A2 Test Connectors 10 Move the probe cable to A2J2...

Page 474: ...o failures were indicated in testing the A2 controller move the probe cable to A17J4 13 Press SOFT KEY 1 and wait five seconds 14 Press SOFT KEY 4 The results will be sent to the printer 15 If no failure is indicated in the printout refer to High Voltage Supplies in Chapter 12 ...

Page 475: ...A jumper on J3 located in the middle of the A2 assembly from the DISable position to the ENAble position 3 Remove jumper A2E1 A2E1 is a 16 pin dual in line package located in the middle of the A2 Assembly Set the HP 8560E LINE switch on 4 Use an oscilloscope to confirm that address lines address strobe and chip selects are toggling at proper levels 5 Use an oscilloscope to check the address line s...

Page 476: ...s SAMPLE pulse When characters of text are being drawn the vectors are 3 µs long 1 On the HP 8560E press PRESET 2 On the HP 8560E press CAL MORE and CRT ADJ PATTERN If the display is blank press the bottom softkey and then the top softkey 3 Set an oscilloscope to the following settings Amplitude scale 3 V div Sweep time 1 ms div Triggering External 4 Externally trigger the oscilloscope off the sig...

Page 477: ...es turn the CRT beam off during the sample time of the line generators and when moving the CRT beam to a new position for drawing the next vector 2 Set an oscilloscope to the following settings Amplitude scale 4 V div Amplitude offset 2 5 V Sweep time 20 µs div Triggering External 3 Externally trigger the oscilloscope off the signal at A2U207 pin 8 LBRIGHT 4 Compare the blanking circuit input sign...

Page 478: ...s shows character mode VECTOR pulses 3 µs apart The BLANK pulses are synchronized to the VECTOR pulses by U214B The fourth trace shows the double pulses which delay the leading and trailing edges of the blanking pulses 6 Set the oscilloscope to the following settings to expand the first and fourth traces This displays how the rising edges of U213 13 determine the transitions of the blanking pulses...

Page 479: ...If the X POS and Y POS waveforms look different from those illustrated in Figure 9 2 on page 476 check the waveforms at the low pass filter input function block E in the component level information binder 3 The waveform at the low pass filter should look like X POS in Figure 9 2 on page 476 but have an amplitude from 0 V to 5 V 4 If the waveform in step 3 is incorrect set an oscilloscope to the fo...

Page 480: ... DACs are stepped one count at a time A stuck bit will distort the diagonal in a repetitive manner The quicker the repetition the less significant the stuck bit Horizontal distortions apply to the X LINE GENERATOR DAC while vertical distortions apply to the Y LINE GENERATOR DAC The DACS have current outputs so they are not readily observable with an oscilloscope Continue with step 8 to observe the...

Page 481: ...tor U201 pin 1 TP2 Y line generator U203 pin 1 TP1 12 Figure 9 7 on page 481 illustrates the waveforms in step 11 expanded to show relative timing the second and fourth traces are delayed by 5 ms from the first and third The oscilloscope settings are changed as follows Sweep time 20 µs div 13 Figure 9 8 on page 482 illustrates the waveforms of properly working line generators Whenever there is a p...

Page 482: ...Chapter 9 481 Controller Section Display Problems 8560E Figure 9 6 Distorted X Y Line Generator Waveforms Figure 9 7 Expanded X Y Line Generator Waveforms ...

Page 483: ...n 2 to pin 3 If the display does not brighten troubleshoot DEF1 switch U207A This switch is used in analog zero span 4 Change the intensity under DISPLAY If the intensity does not change troubleshoot the intensity DAC A2U212A A2U212A is controlled from the front panel The amplitude of the waveform at U211A pin 1 should increase or decrease with intensity changes 5 Clamp U211B limits the voltage to...

Page 484: ...rted to current by R274 If the voltage is negative it is amplified by 2 in A2U210C converted to current by A2R246 and added to the current from A2R274 This effectively turns both negative and positive voltages into positive currents hence absolute value 1 Short A2J201 pin 13 to ground A2TP3 2 Connect channel A of an oscilloscope to A2J201 pin 2 Connect channel B to A2U210D 14 3 Set an oscilloscope...

Page 485: ...orms should look like those illustrated in Figure 9 10 on page 485 If the waveform at J201 pin 14 is bad troubleshoot the Y line generator function block I of A2 controller schematic sheet 1 of 4 10 If the waveform at U210D pin 14 is bad troubleshoot the Z output circuit function block M of A2 controller schematic sheet 1 of 4 11 Remove the jumpers ...

Page 486: ...Chapter 9 485 Controller Section Display Problems 8560E Figure 9 10 Delta Y Waveform ...

Page 487: ... show at the left edge of the screen In these settings DEF1 causes switching between the line generators and the analog inputs sweep and video DEF1 remains high when the CRT adjust pattern is on Refer to function block M of the A2 controller schematic 1 of 4 5 The sweep input from J1 41 should go from 0 V to 10 V the video In signal should go from about 0 V to 1 V from the bottom to the top of the...

Page 488: ...or the A2 controller assembly 1 Disconnect W53 from A2J13 2 Connect the output of a synthesized source such as an HP 3335A to A2J13 3 Set the synthesized source to the following settings Amplitude 10dBm Frequency 5 35MHz 4 Set the spectrum analyzer to the following settings Center frequency 300MHz Span 1MHz 5 On the spectrum analyzer press FREQ COUNT The frequency counter actually reads one half t...

Page 489: ...n the A4 log amplifier cal oscillator or A2 controller assembly 1 Disconnect W53 from A2J7 2 Connect the output of a synthesized source such as an HP 3335A to A2J7 3 Set the synthesized source to the following settings Amplitude 10dBm Frequency 5 35MHz 4 Set the spectrum analyzer to the following settings Center frequency 300MHz Span 1MHz 5 On the spectrum analyzer press FREQ COUNT The frequency c...

Page 490: ...by 5 to generate a 2 MHz timebase This timebase feeds through the clock select multiplexer in U35 to the CLK2 input of programmable timer U15 The output OUT2 of programmable timer U15 is the gating signal HBKT_PULSE it performs the frequency count The gating time interval is a function of the counter resolution which may be set between 10 Hz and 1 MHz Table 9 2 on page 490 lists the gate time for ...

Page 491: ...e signal at A2J2 pin 21 This is an output of the frequency counter HBUCKET PULSE d If HBUCKET PULSE is stuck high troubleshoot the frequency counter 3 Check for a 10 MHz signal at A15J302 If the signal is not present at A15J302 the A15 RF assembly is probably defective Table 9 2 Gate Times Counter Res Gate Time U15 pin 20 low state A2TP16 A2TP15 10 Hz 200 ms 2 MHz 4 18 kHz 100 Hz 20 ms 2 MHz 418 H...

Page 492: ...or performing the frequency count The gating time interval is a function of the counter resolution which may be set between 10 Hz and 1 MHz Table 9 2 on page 490 lists the gate time for each setting of COUNTER RES The gate time is the period during which U511 pin 3 is high The FREQ COUNT input A2J7 is gated in U511B by HBKT_PULSE The gated signal clocks divide by 16 counters U703A and U703B These ...

Page 493: ...the signal at A2J2 pin 21 This is an output of the frequency counter HBUCKET PULSE d If HBUCKET PULSE is stuck high troubleshoot the frequency counter 3 Check for a 10 MHz signal at A15J302 If the signal is not present at A15J302 the A15 RF assembly is probably defective Table 9 3 Gate Times Counter Res Gate Time U511 pin 3 high state A2TP16 A2TP15 10 Hz 200 ms 2 MHz 4 18 kHz 100 Hz 20 ms 2 MHz 41...

Page 494: ...ital ground plane is totally isolated from the chassis 1 Press PRESET on the HP 8560 EC series spectrum analyzer and set the controls as follows Center frequency 300MHz Span 0Hz Reference level 10dBm Log division 10dB DIV Sweep time 20ms 2 Connect the CAL OUTPUT to the INPUT 50Ω connector 3 Adjust the spectrum analyzer reference level to place the signal at the top graticule line on the LCD displa...

Page 495: ...35 Vdc If the level is less more negative than 0 35 Vdc replace voltage clamp D3 11 Measure the dc level of the flash video at pin 2 of R47 The level should be near 0 Vdc with the signal at the bottom graticule line no input to the spectrum analyzer 12 Connect the CAL OUTPUT to the INPUT 50Ω connector 13 Measure the dc level of the flash video at pin 2 of R47 The level should be near 1 7 Vdc ...

Page 496: ...y isolated from the chassis 1 Press PRESET on the spectrum analyzer and set the controls as follows Center frequency 300MHz Span 0Hz Reference level 20dBm Log division 5dB DIV Sweep time 20ms 2 Connect the CAL OUTPUT to the INPUT 50Ω connector 3 Pins 2 through 13 ADC0 ADC11 of U22 should all be high logic 1 corresponding to an ADC digital count of 255 for the analog input of 2 volts or greater 4 D...

Page 497: ...The static RAM stores the ADC samples that are taken when the Fast ADC circuitry is in the write mode When not in the write mode the static RAM is read by the CPU to retrieve the fast ADC data The 8 bit DFADC bus connects the outputs of latches within U35 to the data port of static RAM U21 ...

Page 498: ...ignal is first passed through a high pass filter consisting of C123 and L15 The the signal passes through a bandpass filter centered at 24 MHz consisting of C106 C08 L13 and R80 The comparator U28B generates a square wave The signal then passes through a second stage of filtering by using the bandpass filter consisting of C89 C88 L12 and R77 Comparator U28A then regenerates the square wave A divid...

Page 499: ...z The high pass filter consists of R85 C122 and L14 The bandpass filter consists of L19 and C139 The filter basically filters the fourth harmonic of the 4 MHz signal to generate a 16 MHz signal The resulting signal is then passed through comparator U34A to generate a 16 MHz square wave Three more stages consisting of a bandpass filter followed by a comparator further filter the signal so that a cl...

Page 500: ...an 2 6 V check the BT1 battery 2 If the battery voltage is correct reconnect W6 to A2J3 turn the analyzer power off and wait 5 minutes 3 Measure the voltage at A2U19 pin 32and A2U26 pin 32 4 If the voltage is less than 2 0 Vdc the RAM power battery backup circuitry on the A2 controller assembly is probably at fault The following steps test battery backup for E series instruments 1 Measure the volt...

Page 501: ...shows the analyzer to be in RMT and the ATTEN value displayed on the LCD CRT on E series instruments changed according to the program the A2 controller assembly is working properly Refer to Chapter 8 ADC Interface Section 4 If there was no response over HP IB the A2 controller is probably defective Be sure to also check the A19 HP IB assembly and A19W1 5 If there was an improper response for examp...

Page 502: ...Chapter 9 501 Controller Section Keyboard Problems Figure 9 12 A2 Controller Block Diagram E Series replace with sj125e ...

Page 503: ...502 Chapter9 Controller Section Keyboard Problems ...

Page 504: ...Chapter 9 503 Controller Section Keyboard Problems Figure 9 13 A2 Controller Block Diagram EC Series replace with sj118c ...

Page 505: ...504 Chapter9 Controller Section Keyboard Problems ...

Page 506: ...505 10 Synthesizer Section ...

Page 507: ...LO Driver Amplifier 600 MHz SAWR page 533 Unlocked Offset Lock Loop Sampling Oscillator page 534 Operation page 534 Troubleshooting page 534 Unlocked YTO PLL page 538 Operation page 538 Troubleshooting an Unlocked YTO PLL page 540 Unlocked Fractional N PLL page 547 Operation page 547 Confirming an Unlocked Condition page 547 Fractional N PLL page 548 Frequency Span Accuracy Problems page 555 Deter...

Page 508: ...P 85024A with a spectrum analyzer is recommended for troubleshooting the RF circuitry If an HP 1120A active probe is being used with a spectrum analyzer such as the HP 8566A B or HP 8569A B having dc coupled inputs either set the active probe for an ac coupled output or use a dc blocking capacitor HP 11240B between the active probe and the spectrum analyzer input Some spectrum analyzers can be set...

Page 509: ...be at fault Refer to the troubleshooting procedures in this chapter for further help on isolating those failures The TAM tests the signal path circuitry by digitally controlling the hardware and monitoring the control lines to make sure they are responding properly Use the TAM automatic fault isolation routine or verify the RF levels manually to ensure proper operation Check A3 ADC MUX function bl...

Page 510: ...the other spectrum analyzer to the following settings Center frequency 10 MHz Span 2 MHz 7 The amplitude of the 10 MHz reference signal should measure 1 dBm If the signal does not measure 1 dBm troubleshoot the A15 10 MHz distribution and A21 OCXO if not Option 103 8 Reconnect W37 to A14J301 Check first LO steps 9 11 Table 10 1 Center Frequency Tuning Values HP 8560E EC Center Frequency MHz Sampli...

Page 511: ...p key and measure the YTO output power at each step e Verify that the output power of the A11 YTO is between 9 and 13 dBm f Set jumper A14J23 to the NORM position and reconnect the A11 YTO Check A14 frequency control assembly steps 12 17 12 On the HP 8560E EC press PRESET SPAN ZERO SPAN CAL MORE 1 OF 2 FREQ DIAGNOSE and FRAC N FREQ Note the fractional N oscillator frequency Ignore the minus sign i...

Page 512: ...the DVM reading does not change the A14 frequency control assembly is defective Reconnect W32 to A14J501 Figure 10 1 YTO Loop Test Setup Check A15 RF assembly steps 18 25 19 Disconnect W34 from A15U100J1 and disconnect W32 from A15J101 20 Connect a frequency counter to A15J101 Connect a high frequency test cable from an HP 8340A B synthesized sweeper to A15U100J1 See Figure 10 2 on page 512 21 Con...

Page 513: ...combination the frequency counter should measure a sampler IF as shown in Table 10 2 on page 513 The sampling oscillator of the offset PLL tunes to the frequencies listed in the table If the frequency counter does not read the indicated sampler IF 10 kHz suspect the A15 RF assembly 26 Reconnect W34 to A15U100J1 and W32 to A15J101 27 The 1ST LO OUTPUT located on the front panel must be terminated i...

Page 514: ... Frequency GHz HP 8560E EC Center Frequency MHz Offset PLL Sampling Oscillator Freq MHz CounterReading Sampler IF MHz 6 067000 2156 3 285 000 82 000 6 087000 2176 3 286 364 73 364 6 110200 2199 5 287 500 72 700 6 141000 2230 3 288 462 83 308 4 710000 799 3 288 889 87 778 6 174000 2263 3 290 000 84 000 6 193000 2282 3 290 909 83 909 6 213000 2302 3 291 667 88 000 6 066000 2155 3 292 500 76 500 6 06...

Page 515: ...0 Hz even though it is still possible to sweep the Main and FM coils of the YTO With the YTO in its unlocked conditions and the span set to 0 Hz the nominal YTO frequency is not necessarily the value listed as LO FREQ in the Frequency Diagnose menu The YTO has an initial pretune accuracy of 20 MHz To display the nominal YTO frequency press CAL MORE 1 OF 2 FREQ DIAGNOSE LO FREQ The fractional N osc...

Page 516: ...he manual procedure Table 10 5 on page 517 lists assembly test connectors associated with each manual probe troubleshooting test Figure 10 3 on page 515 illustrates the location of A14 and A15 test connectors The pin locations of a 16 pin TAM connector are indicated in Figure 10 4 on page 516 Table 10 3 on page 516 indicates the correspondence between a measured signal line and the TAM connector p...

Page 517: ...hesizer Section steps 9 11 Check first LO pretune frequency and amplitude Unlocked YTO PLL steps 10 13 Check 3rd LO drive Third LO Driver Amplifier steps 1 6 Check 10 MHz reference to phase frequency Unlocked Reference PLL steps 8 13 detector Check for 10 MHz signal at other input to Unlocked Reference PLL steps 12 and 13 phase frequency detector Check A3 ADC MUX function block Confirming a Faulty...

Page 518: ...ler IF Unlocked YTO PLL steps 23 27 Check sampler sampler IF operation Sampler and Sampler IF steps 1 15 Check span attenuator First LO Span Problems All Spans steps 6 13 Check sweep generator Sweep Generator Circuit Check the 600 MHz reference loop amplifier Unlocked Reference PLL steps 23 26 Check the YTO loop Unlocked YTO PLL Check YTO FM coil driver First LO Span Problems 2 01 MHz to 20 MHz st...

Page 519: ...n bias MS3 Second conv doubler bias MS4 Second conv driver bias MS5 First mixer drive switch MS7 First mixer drive DAC MS6 A14J302 Revision MS7 Fractional N out MS1 Divided reference MS4 Feedback buffer bias MS5 Outamp bias MS6 A15J200 Positive 15 volt supply MS1 Sampler drive buffer bias MS2 Sampling oscillator bias MS3 Offset lock drive buffer MS4 Only on A14 assemblies with part numbers 08560 6...

Page 520: ... MHz oscillator bias MS5 Calibrator AGC amp bias MS6 Calibrator ampl adj MS7 3rd LO driver amp MS1 MS8 A15J602 Positive 15 volt supply MS8 Flatness compensation 3 MS2 Flatness compensation 2 MS5 Flatness compensation 1 MS6 SIG ID collector bias Option 008 MS7 RF gain control test MS1 MS3 A15J901 Revision MS3 External mixer switch MS1 MS8 Signal ID switch Option 008 MS5 MS6 Ten volt reference MS4 E...

Page 521: ...oblems on a generalized PLL PLL Locked at Wrong Frequency Numbers in the following text identify items in Figure 10 5 on page 521 Any frequency errors at reference 1 will be multiplied by N M on the PLL output A sampler reference frequency error 2 will be multiplied by its harmonic on the PLL output A mixer reference frequency error 3 produces the identical error on the PLL output If divider input...

Page 522: ...L Locked at Wrong Frequency Unlocked PLL An unlocked PLL can be caused by problems inside or outside the PLL Troubleshoot this problem by working backward from the oscillator as described in the steps below Numbers in the following text identify items in Figure 10 6 on page 522 ...

Page 523: ... voltage at 1 should increase as the frequency increases on all of the PLLs Figure 10 6 Unlocked PLL 2 If the integrator output voltage changes in the manner described in Table 10 6 TAM Tests versus Test Connectors PLL Measurement Point YTO PLL A14J23 pin 1 YTO ERROR Reference PLL A15J502 pin 3 LO3 ERR Sampler PLL A15J200 pin 13 OFL ERR Fractional N PLL A14TP13 INTEGRATOR ...

Page 524: ... that the pulses out of the phase detector 2 are attempting to tune the oscillator in the correct direction 3 If the phase detector output is bad check the inputs to the detector 3 One input should be higher in frequency than the other this should match the phase detector outputs 4 Confirm proper power levels for the signals at the input to the N dividers 4 the reference inputs 5 and 7 and the loo...

Page 525: ...e the tripler output at A15TP700 The tripler output should be 3 dBm 2 dB 2 If the tripler output is within tolerance suspect the doubler circuitry Refer to function block S of the A15 RF schematic sheet 2 of 4 3 If the tripler output is too low probe the output of A15U700 RF amplifier The level should be 16 5 dBm 2 dB The level at the input of A15U700 should be 8 5 dBm 2 dB 4 If the level at the i...

Page 526: ...el signals approximately 10 MHz are not present check signals backwards through the loop to find a fault in the signal path 15 Measure the signals at the following test points with an active probe spectrum analyzer combination 16 If an approximately 10 MHz TTL signal is present at U502 pin 11 with 60 percent duty cycle and the RF portion of the phase lock loop is functioning the fault probably lie...

Page 527: ...the 10 MHz component of the signal The filtered signals are then integrated by U506 and the result is fed to the tune line of the 100 MHz VCXO 24 Check that the voltage on A15J502 pin 3 is less than 0 Vdc Refer to function block P of A15 RF schematic 25 Press AUX CTRL REAR PANEL and 10 MHz INT and remove the divided down 100 MHz input to the phase frequency detector by shorting R572 26 Check that ...

Page 528: ...m troubleshoot the PIN diode attenuator the detector or the feedback path 29 Measure the detector voltage at A15J502 pin 14 The voltage should measure approximately 0 3 Vdc when the CAL OUTPUT signal is at 10 dBm This voltage should change with adjustment of A15R561 CAL AMPTD 30 Check that the voltage at U507A Pin 3 is 1 7 Vdc If this voltage is not correct there may be a problem with the 10 V ref...

Page 529: ...s installed 2 Use an active probe spectrum analyzer combination to confirm the power level of the 300 MHz signal at the following test points 3 If the signal at A15X602 pin 5 is low but the signal at A15TP504 is correct press AUX CTRL INTERNAL MIXER Press SIG ID OFF if present 4 Check that PIN diode switches CR603 and CR605 are reverse biased by approximately 10 Vdc Refer to function block F of A1...

Page 530: ...r to function blocks Q and R of A15 RF schematic in the HP 8560 E Series Spectrum Analyzer Component Level Information Troubleshooting 600 MHz SAWR 1 If Q701 and Q703 are functioning check the bias on varactors CR701 and CR702 The varactors should be reverse biased between 0 V and 18 V depending on tune voltage 2 If the active devices are functioning properly check the SAWR by placing a 100 ohm re...

Page 531: ...al path 14 Use an oscilloscope to check for 50 MHz TTL level signal at U503 pin 2 Refer to function block X of A15 RF schematic 15 Measure the signals at the following test points with an active probe spectrum analyzer combination such as an HP 85024A HP 8566A B The signal level at TP701 should be sufficient to drive an ECL input 16 If an approximately 10 MHz TTL signal is present at U504 pin 11 w...

Page 532: ... MHz component of the signal The filtered signals are then integrated by U506 and the result is fed to the tune line of the 600 MHz oscillator 23 Remove 10 MHz reference input to the phase frequency detector by pressing AUX CTRL REAR PANEL and 10 MHz EXT No signal should be connected to the rear panel 10 MHz REF IN OUT connector 24 Check that the voltage on A15J502 pin 3 is less than 0 Vdc Refer t...

Page 533: ... RF forward path through amplifier Q505 The signal amplitude decreases If the CAL OUTPUT signal level is greater than 10 dBm troubleshoot the PIN diode attenuator the detector or the feedback path 29 Measure the detector voltage at A15J502 pin 14 The voltage should measure approximately 0 3 Vdc when the CAL OUTPUT signal is at 10 dBm This voltage should change with adjustment of A15R561 CAL AMPTD ...

Page 534: ...ss SIG ID OFF 2 Use an active probe spectrum analyzer combination to confirm the power level of the 300 MHz signal at the following test points 3 If the signal at A15TP602 is low but the signal at A15TP504 is correct press AUX CTRL INTERNAL MIXER For Option 008 press SIG ID OFF 4 Check that PIN diode switches CR603 and CR605 are reverse biased by approximately 10 Vdc Refer to function block F of A...

Page 535: ... factor of approximately 24 Table 10 7 on page 535 lists the prescaler and postscaler divide numbers in the offset loop reference divide chain for each of the 16 discrete frequencies to which the offset lock loop may be set It also indicates what the reference frequency into the phase frequency divide chain is Refer to function block AN on the RF schematic Troubleshooting Check loop references ste...

Page 536: ...n block AM of A15 RF schematic sheet 3 of 4 A15TP402 7 dBm Table 10 7 Sampling Oscillator PLL Divide Numbers Sampling Oscillator Frequency MHz Center Frequency MHz Reference Divide Chain Reference Frequency MHz Prescaler Postscaler 285 000 2156 3 10 2 15 000 286 364 2176 3 11 2 13 636 287 500 2199 5 8 3 12 500 288 462 2230 3 13 2 11 538 288 888 799 3 9 3 11 111 290 000 2263 3 10 3 10 000 290 909 2...

Page 537: ... presence of a 4 MHz square wave reference frequency signal at U406 pin 3 The square wave is TTL whose peak values should be less than 0 6 V and greater than 2 2 V 16 Disconnect the jumper from X201 pins 1 and 5 Disconnect the dc power supply which is connected to A15J200 pin 16 17 Set HP 8560E EC to the following settings Center frequency 300 MHz Span 0 Hz 18 Use an oscilloscope to confirm the pr...

Page 538: ...uld be present 22 Short C441 with a wire jumper Connect the jumper from the end of R462 nearest C441 to the end of R460 nearest C443 This changes the loop integrator into a voltage follower Refer to function block AB of A15 RF schematic 23 Check the voltages at the following points 24 If the voltages are not correct suspect A15U408 25 Remove the jumpers A15U408 pin 6 2 5 Vdc approximately A15X201 ...

Page 539: ...e sampling oscillator frequency Notice that FIF can be positive or negative depending upon whether the sampling oscillator harmonic used is less than or greater than the YTO frequency The actual sampler IF is always positive but the sign is carried along as a bookkeeping function which determines which way to sweep the fractional N oscillator up or down and what polarity the YTO error voltage shou...

Page 540: ...ary since an increasing YTO frequency decreases the sampler IF for negative sampler IFs The opposite is true for positive sampler IFs so in these cases the fractional N oscillator sweeps more conventionally from a lower frequency to a higher frequency Table 10 8 on page 539 summarizes the amplifier polarities for the various combinations of sampler IF polarities and LO spans The YTO main coil filt...

Page 541: ...3 on page 515 for the location of A14J23 Error code 301 should no longer be displayed The YTO PLL feedback path is now open and the YTO error voltage is forced to zero 3 On the HP 8560E EC press CAL MORE 1 OF 2 FREQ DIAGNOSE and LO FREQ The displayed LO FREQ is the desired YTO frequency calculated Record calculated frequency of the YTO below 4 Measure the YTO frequency at the front panel 1ST LO OU...

Page 542: ...cy recorded in step 3 from the frequency recorded in step 4 Record the result below YTO Frequency Error YTO Frequency MEASURED YTO Frequency CALCULATED 6 On the HP 8560E EC press MORE 1 OF 2 FREQ DIAGNOSE and FRAC N FREQ Record the fractional N frequency below YTO Frequency Error ________________________MHz Fractional N frequency _____________________________MHz ...

Page 543: ...tput levels of the A15U100 sampler If the sampler appears defective check the LO drive to the sampler as described in Sampler and Sampler IF Refer to steps 34 through 51 below Check first LO pretune frequency and amplitude steps 10 13 9 The pretuned frequency of the first LO must be sufficiently accurate for the YTO loop to acquire lock The amplitude of the first LO must be sufficient to drive the...

Page 544: ...ressing CAL MORE 1 OF 2 FREQ DIAGNOSE FRAC N FREQ and setting the HP 8560E EC to SINGLE trigger mode 17 If the fractional N oscillator frequency is not correct refer to Unlocked Fractional N PLL in this chapter Check sampler drive output of A7 LODA steps 19 22 18 Set jumper A14J23 to the TEST position and set the HP 8560E EC to the following settings Center frequency 2 9 GHz Span 0 Hz 19 Disconnec...

Page 545: ...Set the signal generator to the following settings and repeat step 30 Frequency 56 MHz Amplitude 15 dBm 33 If the voltage monitored in step 30 is correct with a 0 dBm output but not with 15 dBm output suspect the limiting amplifier function block AE 34 Place jumper A14J23 in the NORMAL position and reconnect W32 to A14J501 Check YTO FM coil driver and main loop error voltage driver steps 35 40 35 ...

Page 546: ... with the span remaining 0 Hz This will change the switch setting of U326A and invert the voltages listed in Table 10 9 on page 545 Check main coil coarse and fine DACs steps 41 44 41 The main coil coarse and fine DACs correct any initial pretune errors in the YTO main coil The DACs adjust the FM coil current to zero before any sweep begins Refer to function block J of A14 frequency control schema...

Page 547: ...ion block E of A14 frequency control schematic 50 If the HP 8560E EC center frequency is 300 MHz the voltage at A14J18 pin 3 should measure 3 35 V 0 25 V The voltage may also be determined from the following equation V First LO Frequency 2 95 GHz 2 654 V GHz 51 The voltage at A14U330 pin 2 should measure 3 4 V 0 2 Vdc This represents a current setting the YTO to approximately 2 95 GHz 52 Return ju...

Page 548: ...DIAGNOSE and FRAC N FREQ The FRAC N FREQ frequency displayed is the frequency that will be measured at A14J304 with the HP 8560E EC in zero span Confirming an Unlocked Condition 1 Set the HP 8560E EC to the following settings Center frequency 300 MHz Span 0 Hz 2 Connect A14J304 FRAC N TEST to the input of a synthesized spectrum analyzer and view the fractional N PLL output at 66 7 MHz NOTE If a sy...

Page 549: ... or 7 to generate the 60 MHz to 96 MHz output The prescaler function block AR supplies the clock signal for the fractional divider and is required for the fractional divider to operate At the start of a fractional N sweep the fractional divider is set to a value for the start frequency and a sweep rate It then sweeps for as long as HSCAN is high Use the following procedure to troubleshoot unlocked...

Page 550: ...to Expected Value Tune Voltage Less than 4 V About 3 3 V Between 2 V and 10 V About 11 V Greater than 12 5 V Measured expected VCO clamp VCO Divider or integrator Divider or integrator VCO clamp Measured expected VCO clamp Divider or integrator Divider or integrator VCO VCO clamp Measured not oscillating VCO clamp VCO VCO VCO VCO clamp Table 10 13 Unlocked Fractional N Troubleshooting Areas 08560 ...

Page 551: ...ugh CR131 and Q131 for positive excursions or CR132 and Q132 for negative excursions The base of Q131 should be at about 9 60 V and the base of Q132 should be at about 2 09 V for proper operation If troubleshooting an earlier A14 frequency control assembly 08560 60062 and below the bases of Q131 and Q132 should be at about 9 6 V for proper operation 8 VCO troubleshooting Check the dc biases in the...

Page 552: ...Chapter 10 551 Synthesizer Section Unlocked Fractional N PLL Figure 10 8 VCO Bias Voltages for A14 Assemblies 08560 60069 and Above ...

Page 553: ...gure 10 8a VCO Bias Voltages for A14 boards 08560 60062 and below 9 Divider and integrator troubleshooting Measure the frequency of the pulses at TP6 in block AO Look up the expected problem area in Table 10 14 on page 553 and go to the appropriate troubleshooting ...

Page 554: ... frequency measured at TP5 and RAW OSC FREQ comes from step 4 A14TP1 If the frequency is in error the fractional divider block AS is not functioning Check that FRAC N RUN on U113 pin 39 is high e Use an oscilloscope to verify that the signals at N_in U112 pin 8 and N_out TP6 are identical except for a sub microsecond delay 11 Detector and integrator troubleshooting a Check the phase detector outpu...

Page 555: ...y to go very positive about 12 V if its average input TP12 is positive If its average input is negative it should try to go very negative about 4 V If its average input is zero and it is functioning correctly it may take on any output voltage between 4 V and 12 V between 12 V and 12 V for 08560 60062 and below ...

Page 556: ...O span due to harmonic mixing this is not necessarily the same as the span setting of the spectrum analyzer Refer to Table 10 15 on page 555 for a listing of sweep signal destinations versus First LO spans Sweeping the fractional N oscillator results in sweeping the YTO FM coil There is a one to one relationship between the fractional N oscillator frequency span and the first LO span The fractiona...

Page 557: ...significantly 2 or more suspect the A11 YTO 2 If first LO spans of 2 MHz or less only are faulty suspect the A14 fractional N PLL 3 If there are several spans in the main coil and FM coil ranges affected suspect the A14 span attenuator YTO Main Coil Span Problems LO spans 20 MHz For YTO main coil spans the YTO is locked at the beginning of the sweep and the sweep ramp is summed into the main coil ...

Page 558: ...e FM coil The FM coil sensitivity is corrected by changing the sensitivity of the FM coil driver 1 Perform the YTO Adjustment procedure in Chapter 2 If the YTO adjustments cannot be performed continue with this procedure 2 Set the HP 8560E EC to the following settings Center frequency 300 MHz Span 20 MHz Sweep time 50 ms 3 Check for the presence of a 0 V to 10 V sweep ramp at A14J15 pin 14 input t...

Page 559: ...proximately 19 of the voltage at A14J23 pin 2 g If the first LO frequency did not change in step e turn off the HP 8560E EC LINE switch and disconnect W10 from A14J3 h Place a jumper between A14J3 pins 9 and 10 Place a 50 Ω 3 watt resistor across A14J3 pins 5 and 6 resistor HP part number 0811 1086 Set the LINE switch on i On the HP 8560E EC press RECALL STATE STATE 0 j The voltage at A14U332 pin ...

Page 560: ...ere is 0 V to 10 V ramp of 50 ms duration at A14J15 pin 15 3 If a scan ramp is not present refer to Sweep Generator in this chapter 4 If there is a 0 to 10 V ramp at A14J15 pin 14 the fault is probably in the Main FM sweep switch See function block H of A14 frequency control schematic 5 Check that there is a 0 V to 10 V ramp at U325 pin 1 The spectrum analyzer ADC obtains information about the swe...

Page 561: ... 14 for a 0 V to 7 4 V ramp Switches U317A U317B and U317D should be open and U317C should be closed 7 Change the spectrum analyzer SPAN to 365 MHz and check for a 0 to 936 mV ramp at A14J15 pin 14 Switches U317A B and C should be open and U317D closed 8 Change the spectrum analyzer SPAN to 36 5 MHz and check for a 0 to 93 6 mV ramp at A14J15 pin 14 Switches U317B C and D should be open and U317A ...

Page 562: ... versus Lock and Roll Spans Input a signal to the spectrum analyzer Set the center frequency to the input signal frequency set the span to 2 MHz and plot the display This plots the system noise for a locked sweep Plot the display again with a span of 2 01 MHz lock and roll sweep The crossover point of the noise floor of the two plots is typically at an offset of about 50 kHz for a functioning inst...

Page 563: ...ntrol assembly If the measurements differ by 2 dB to 5 dB with the 2 5 GHz measurement at a higher noise level suspect the offset lock loop circuitry Fractional N PLL Phase Noise 08560 60062 and below only Check the noise on the 5 V regulators on A14 particularly the regulator in the reference divider circuitry A14U121 Refer to function block AN on the A14 frequency control assembly schematic The ...

Page 564: ...ect W32 to one of the splitter outputs Connect the other splitter output to the input of another spectrum analyzer 4 If a 66 7 MHz signal greater than 15 dBm is not displayed on the other spectrum analyzer set a microwave source to the following settings Frequency 4 2107 GHz Amplitude 5 dBm 5 Connect the microwave source to A15U100J1 A 66 7 MHz signal at approximately 0 dBm should be displayed on ...

Page 565: ...ollowing settings Center frequency 300 MHz Span 0 Hz 10 Set a microwave source to the following settings Frequency 4 2107 GHz Amplitude 5 dBm 11 Connect the microwave source to A15U100J1 12 Measure the signal at U103 pin 1 using an active probe spectrum analyzer combination 13 If a 94 7 MHz signal approximately 14 dBm is present but the signal at A15J101 is low suspect U103 14 When U104 pin 3 is a...

Page 566: ...r U320B to ramp from 0 V to 10 Vdc The analyzer ADC monitors the scan ramp at U325A pin 1 via the scan ramp attenuator U320B pin 7 When the ramp reaches 10 V for single band sweeps HSCAN is brought low and the integration ends During normal non fast zero spans sweep times 30 ms comparators U319A and B are high This turns off diodes CR1 CR2 and turns on transistors Q1 and Q2 The integrating current...

Page 567: ...566 Chapter10 Synthesizer Section Sweep Generator Circuit for Spectrum Analyzers with 100 s max Sweep Time Figure 10 9 Simplified Sweep Generator ...

Page 568: ...Chapter 10 567 Synthesizer Section Sweep Generator Circuit for Spectrum Analyzers with 100 s max Sweep Time Figure 10 10 Simplified Sweep Generator during Retrace ...

Page 569: ... the same These two transistors are matched so their collector currents should be identical when their base emitter voltages are identical The emitter current of Q3B is 200 µA therefore the emitter current of Q3A is 200 µA and the sweep ramp is generated by C14 The sweep time is given by the formula Where V is equal to 10 Volts With a capacitance of 1µF and a current of 200µA the sweep time should...

Page 570: ...ture of the A14 frequency control assembly For example if the ambient temperature is approximately 20 C and the A14 frequency control assembly is 10 C warmer the actual temperature of the A14 assembly is 30 C and U312 pin 1 should measure 300 mV 9 To check the temperature dependent offset voltage generator connect the positive lead of the voltmeter A14Q3 pin 6 The voltmeter should read 600 mV 150 ...

Page 571: ...570 Chapter10 Synthesizer Section Sweep Generator Circuit for Spectrum Analyzers with 2000 s max Sweep Time Figure 10 11 Simplified Synthesizer Section ...

Page 572: ...Chapter 10 571 Synthesizer Section Sweep Generator Circuit for Spectrum Analyzers with 2000 s max Sweep Time Figure 10 12 Simplified A14 Assembly Block Diagram ...

Page 573: ...572 Chapter10 Synthesizer Section Sweep Generator Circuit for Spectrum Analyzers with 2000 s max Sweep Time Figure 10 13 Simplified A15 Assembly Block Diagram 100 MHz PLL ...

Page 574: ...Chapter 10 573 Synthesizer Section Sweep Generator Circuit for Spectrum Analyzers with 2000 s max Sweep Time Figure 10 13a Simplified A15 Assembly Block Diagram 600 MHz PLL ...

Page 575: ...tment should typically not be necessary after OCXO replacement and is generally not recommended If adjustment is necessary the spectrum analyzer must be on continuously for a minimum of 24 hours immediately prior to oscillator adjustment to allow both the temperature and frequency of the oscillator to stabilize Failure to allow sufficient stabilization time could result in oscillator misadjustment...

Page 576: ...Chapter 10 575 Synthesizer Section A21 OCXO Figure 10 14 Frequency Control Block Diagram Replace with sj19c ...

Page 577: ...576 Chapter10 Synthesizer Section A21 OCXO ...

Page 578: ...Chapter 10 577 Synthesizer Section A21 OCXO Figure 10 15 RF Block Diagram for A15 08563 60054 08563 60055 or 08563 60056 Replace with sj110c ...

Page 579: ...578 Chapter10 Synthesizer Section A21 OCXO ...

Page 580: ...Chapter 10 579 Synthesizer Section A21 OCXO Figure 10 16 RF Block Diagram for A15 08563 60054 08563 60055 or 08563 60056 Replace with sj141c ...

Page 581: ...580 Chapter10 Synthesizer Section A21 OCXO ...

Page 582: ...581 11 RF Section ...

Page 583: ...ssembly page 598 Confirming a Faulty Third Converter page 598 Confirming a Third Converter Output page 598 Third Converter page 599 Flatness Compensation Control page 600 Control Latches page 601 SIG ID Oscillator Option 008 page 602 10 MHz Reference page 603 A10 Tracking Generator Option 002 page 607 Block Diagram Description page 607 Output Goes Unleveled ERR 900 or ERR 901 page 608 Excessive Re...

Page 584: ...uitry If an HP 1120A Active Probe is being used with a spectrum analyzer such as the HP 8566A B or the HP 8562A B having dc coupled inputs either set the active probe for an ac coupled output or use a dc blocking capacitor HP 11240B between the active probe and the spectrum analyzer input Failure to do this can result in damage to the spectrum analyzer or to the probe ...

Page 585: ...ciated with each Manual Probe Troubleshooting test Figure 11 1 on page 584 illustrates the location of A15 test connectors Figure 11 1 A14 and A15 Test Connectors Table 11 1 Automatic Fault Isolation References Suspected Circuit Indicated by Automatic Fault Isolation Manual Procedure to Perform Check 2nd IF Amplifier Third Converter Check 2nd IF Distribution Third Converter Check 10 7 MHz IF Out o...

Page 586: ...eps 1 to 4 Check LO Feedthrough Low Band Problems 1 kHz to 2 9 GHz steps 1 to 3 Check LO Power Low Band Problems steps 4 to 9 Check PIN Switch PIN Switch Check PIN Switches in SIG ID Oscillator SIG ID Oscillator Check Second Converter Control A13 Second Converter Check SIG ID Oscillator Signal ID Oscillator Adjustment in Chapter 2 Check SIG ID Oscillator Operation SIG ID Oscillator Check Third Con...

Page 587: ...ch MS7 First Mixer Drive DAC MS6 A14J302 Revision MS7 A15J400 IF AMP Limiter Bias MS6 A15J502 Third LO Tune Voltage MS3 3rd LO Driver Amp MS1 MS8 A15J602 SIG ID Collector Bias MS7 RF Gain Control Test MS1 MS3 A15J901 Revision MS3 External Mixer Switch MS1 MS8 Signal ID Switch MS5 MS6 External Mixer Bias MS7 RF Gain Test MS2 Table 11 2 TAM Tests versus Test Connectors ...

Page 588: ...feedthrough amplitude with the markers set the span to 0 Hz and center frequency to 0 Hz Press MKR ON 4 If the LO feedthrough amplitude is within limits but signals are low the RF path following the A8 Low Band Mixer is operating properly 5 If the LO feedthrough amplitude is higher than 5 dBm signal will be clipped at top of screen and signals are low in amplitude suspect a defective A8 Low Band M...

Page 589: ...e TEST position Remove W38 from the input of the A7 LODA 6 Use a power meter or another spectrum analyzer to measure the output of A11 YTO The power should be between 2 dBm and 13 dBm 7 Reconnect W38 to the LODA Place the jumper on A14J23 in the NORM position 8 If ERR 334 unleveled output is present and the A11 YTO power output is correct the A7 LODA drive circuit may be defective Refer to A7 LODA...

Page 590: ...and A14J19 pin 6 Connect a jumper between A14J18 pin 13 and A14J18 pin 1 3 Connect the positive lead of a DVM to A14J18 pin 14 and the negative lead to A14J18 pin 6 4 Press LINE to turn spectrum analyzer on 5 The voltage measured on the DVM should be more negative than 9 4 Vdc 6 Move the jumper from A14J18 pin 1 to A14J18 pin 2 The voltage measured on the DVM should be more positive than 12 3 Vdc ...

Page 591: ...TE BIAS voltage listed on A7 LODA label If the voltage does not vary between 0 Vdc and 2 Vdc troubleshoot the A14 frequency control assembly 13 Disconnect the jumper from A14J19 to A14J10 Press LINE to turn spectrum analyzer off Reconnect W12 to A14J10 Press LINE to turn spectrum analyzer on 14 If the DVM reading changes significantly the A7 LODA is probably defective ...

Page 592: ...er spectrum analyzer check for approximately 21 dBm 300 MHz at the input of A8 This level can easily be measured at the output of FL1 by disconnecting W45 from FL1 5 If the level at the input of A8 is less than 25 dBm suspect FL1 low pass filter or A9 input attenuator Refer to power levels shown on Figure 11 5 RF Section Troubleshooting Block Diagram 6 Check for approximately 30 dBm 3 9107 GHz at ...

Page 593: ...ns of A14U420 with a logic probe or DVM while setting the input attenuator to the values listed in Table 11 3 on page 593 NOTE The logic levels listed in Table 11 3 on page 593 show the default AC usage Pin 5 low Pin 6 high DC usage Pin 5 high Pin 6 low is not shown 6 If one or more logic levels listed in Table 11 3 on page 593 is incorrect disconnect W11 from A14J6 and repeat step 4 checking only...

Page 594: ...0 dB DC AC 40dB 40dB 10 dB 10 dB 0 high low low high low high low high 10 high low low high low high high low 20 low high low high low high low high 30 low high low high low high high low 40 high low low high high low low high 50 high low low high high low high low 60 low high low high high low low high 70 low high low high high low high low ...

Page 595: ...er spectrum analyzer should be approximately 38 dBm 6 Remove the test cable from A13J2 and reconnect W35 to A13J2 7 Disconnect W33 coax81 from A13J4 and connect W33 through a test cable to the input of another spectrum analyzer 8 Tune the other spectrum analyzer to a center frequency of 600 MHz 9 If a 600 MHz signal is not present or its amplitude is less than 5 dBm the fault is probably on the A1...

Page 596: ...d Press LINE to turn spectrum analyzer off reconnect W13 to A14J12 and press LINE to turn spectrum analyzer on Set the HP 8560E EC to the following settings Center frequency 300MHz Span 0Hz 13 Move the positive lead of the DVM to A14J19 pin 1 The voltage should measure between 150 m Vdc and 800 mVdc If the voltage measures outside this limit the A13 Second Converter is probably defective ...

Page 597: ...put power is low the A14U429B output voltage at A14J18 pin 14 item 2 of Figure 11 2 on page 597 should be greater than 0 V If the output power is high the voltage should be more negative than 10 V If the voltages do not measure as indicated check that the voltages at A14J18 pins 5 and 13 item 4 are consistent with the output of the operational amplifier NOTE If a TAM is available use Manual Probe ...

Page 598: ...Chapter 11 597 RF Section A14 Frequency Control Assembly Figure 11 2 A7 LODA Drive ...

Page 599: ...ss PRESET and set the controls to the following settings Center frequency 300MHz Span 0Hz 5 Connect a signal generator to A15J801 6 Set the signal generator to the following settings Frequency 310 7 MHz CW Power 28dBm 7 If a flat line is displayed within 2 dB of the reference level and the performance test passed troubleshoot microcircuits A7 A8 A9 and A13 8 If a flat line is displayed within 2 dB...

Page 600: ... stages of SAW filters for image frequency rejection The flatness compensation amplifier consists of two fixed gain stages and two stages of variable gain This provides an overall adjustable gain of 4 dB to 30 dB This gain is adjusted during an spectrum analyzer sweep to compensate for front end conversion loss versus frequency Perform the following steps to test the amplifier gain The 10 7 MHz ba...

Page 601: ... 13 12 Check that the gain stages are properly biased and functioning 13 Check the attenuator stages and flatness compensation control circuitry a For minimum gain flatness data equals 4095 RF GAIN A15U909 pin 10 should be at 1 6 Vdc and the current through each section as measured across R667 or R668 should be about 7 mA b For maximum gain flatness data equals 0 RF GAIN A15U909 pin 10 should be a...

Page 602: ...proximately 5 Vdc TTL high 3 On the HP 8560E EC press AUX CTRL and INTERNAL MIXER The voltage on the DVM should measure approximately 0 Vdc TTL low 4 Connect the positive lead of a DVM to A15J901 pin 13 LSID The signal measured turns on the SIG ID oscillator Option 002 only 5 For Option 002 spectrum analyzers Press SIG ID ON SGL SWP Subsequent pushes of SGL SWP should cause the signal measured on ...

Page 603: ...ch press of SGL SWP the spectrum analyzer alternates between the following two states State 1 A15J901 pin 13 LSID TTL low SIG ID oscillator ON Signal at A15TP602 298 MHz 50 kHz at least 1 dBm State 1 A15J901 pin 13 LSID TTL high SIG ID oscillator OFF 3rd LO driver amplifier Provides LO for double balanced mixer 4 With the SIG ID oscillator on measure the frequency at A15TP602 with a frequency coun...

Page 604: ...nce U304D controls the outputs of these three NAND gates and the output of U304B is held high Check the 10 MHz reference by performing the following steps 1 Set the HP 8560E EC 10 MHz reference to internal by pressing AUX CTRL REAR PANEL and 10 MHz INT 2 Use a spectrum analyzer to confirm the presence of a 10 MHz signal at the following test points A15J303 10dBm A15J304 10dBm A15J301 2dBm 3 Check ...

Page 605: ... EC press 10 MHz INT b Check U305 pin 3 for approximately 12 Vdc Option 103 only c Check for a 10 MHz sine wave greater than or equal to 1 V p p at J305 standard HP 8563E or at U302 pin 3 with an oscilloscope Option 103 10 If the signal at U304 pin 13 is correct see Figure 11 4 on page 605 but there is a problem with the signals at A15J301 A15J302 A15J303 or A15J304 suspect U303 or U304 in the 10 ...

Page 606: ...11 605 RF Section A15 RF Assembly Figure 11 4 10 MHz TTL Reference at U304 Pin 13 Table 11 4 on page 606 lists the RF Section mnemonics shown in Figure 11 5 on page 615 and provides a brief description of each ...

Page 607: ...A SIG ID Oscillator ON 12V SIG ID OFF 8V SIG ID ON PIN DIODE SWITCH PIN diode switch control for 2ND conv IF output MIXER BIAS Detected voltage on 2ND converter mixer diode RFGAIN Voltage to control gain of flatness comp amps RFGAIN1 and RFGAIN2 Currents to drive PIN diodes in flatness comp amps L10dB A L20dB B L40dB C Control lines to set attenuator sections A B and C to attenuate position active...

Page 608: ...residual FM and frequency drift of the tracking generator The 182 14 MHz output frequency is obtained by doubling the output of a crystal oscillator operating at 91 07 MHz Upconverter The upconverter mixes the tracking oscillator output with the buffered 600 MHz reference from the A15 RF assembly The upconverter also contains a filter to pass only the 782 14 MHz upper sideband Pentupler The pentup...

Page 609: ...oop drives the modulator The following troubleshooting information is aimed at isolating tracking generator related faults to either the A10 tracking generator assembly or one of the other supporting assemblies such as A14 A15 or A7 The A10 tracking generator is not field repairable a rebuilt exchange assembly is available Output Goes Unleveled ERR 900 or ERR 901 The ADC on the A3 interface assemb...

Page 610: ...d only at power levels greater than the specified maximum leveled output power level 3 Check maximum power available from the TG Connect the RF OUT 50 Ω to the INPUT 50 Ω connector Press PRESET AMPLITUDE 2 0 dBm LOG dB DIV 5 dB AUX CTRL TRACKING GENRATOR SRC PWR ON MORE 1 OF 3 ALC EXT No connection should be made to the ALC EXT INPUT connector on the rear panel The available power should always be...

Page 611: ... be greater than 500 mV If the voltage is less than 500 mV perform the Tracking Oscillator Range performance test in the HP 8560 E Series Spectrum Analyzer Calibration Guide If this test fails perform the Tracking Oscillator Range Adjustment If the noise on this tune line is greater than 10 mV troubleshoot the BITG drive circuitry on A14 3 Monitor the output of the tracking generator with another ...

Page 612: ... If the power level at W43 is also out of tolerance suspect either the A7 LODA or the A11 YTO Refer to Chapter 10 Synthesizer Section 3 Check all coax cables especially semi rigid cables A fault in one of these cables can cause a very high Q power hole Vernier Accuracy Out of Tolerance Vernier accuracy is a function of the POWER LVL drive signal from the A14 frequency control assembly and the ALC ...

Page 613: ...0E EC to each frequency as indicated in the performance test with the span set to 0 Hz At each frequency setting press SGL SWP CAL MORE 1 OF 2 FREQ DIAGNOSE LO FREQ The frequency displayed will be the fundamental frequency of the 1ST LO OUTPUT Use the HP 8566A B to measure the level of the second and third harmonics of the 1st LO signal NOTE The 1st LO typically has a higher harmonic content than ...

Page 614: ...wer level setting 1 If the power sweep appears to be non monotonic the fault probably lies on the A3 interface assembly real time DACs To check the operation of R T DAC1 monitor A3J400 pin 3 with an oscilloscope Trigger the oscilloscope off the negative going edge of the BLKG GATE OUTPUT rear panel of the HP 8560E EC Set the power sweep range to 12 8 dB and tracking generator RF POWER to 10 dBm Se...

Page 615: ...e from 0 V to 10V Monitor A14J17 pin 13 with the DVM Use the RPG knob to set the FINE TRACK ADJ value from 0 to 255 The voltage measured should increase from 0 V to 10V Monitor A14J17 pin 15 with the DVM The voltage at this point should change as both the FINE TRACK ADJ and COARSE TRACK ADJ values are changed however the voltage change per step of the FINE TRACK ADJ will be much less about one six...

Page 616: ...Chapter 11 615 RF Section A10 Tracking Generator Option 002 Figure 11 5 HP 8560E RF Section Troubleshooting Block Diagram Replace with sj111c ...

Page 617: ...616 Chapter11 RF Section A10 Tracking Generator Option 002 ...

Page 618: ...617 12 Display Power Supply Section ...

Page 619: ...onal injury The voltage potential at A6A1W3 in 8560 E series instruments is 9 kV If the cable must be disconnected always disconnect it at the CRT with caution Failure to properly discharge A6A1W3 may result in severe electrical shock to personnel and damage to the instrument See procedure 2 in Chapter 3 Do not discharge the CRT second anode in 8560 E series instruments directly to ground with the...

Page 620: ... the A18 LCD liquid crystal display and the A6 power supply The A6 power supply is explained in the power supply section which begins on page 590 Figure 12 1 on page 620 illustrates the LCD block diagram Troubleshooting the LCD Display page 621 Blank Display page 621 Dim Display page 622 Troubleshooting using the VGA port page 622 Troubleshooting using part substitution page 622 ...

Page 621: ...monitors the control signals and determines when the Hitatchi 7707 processor writes to display memory When this occurs the FPGA makes a duplicate of this information on the display driver board The other main function of the FPGA is to provide the signals necessary to drive a TFT LCD display and a standard VGA monitor The processor reads display information received from the controller board creat...

Page 622: ... display is still blank suspect the A2 controller a loose cable or the display driver 6 If the LED is not lit or the fan is not working or the probe power voltages are not correct or the power supply indicators on the edge of the A2 controller assembly are not working properly proceed to the section on troubleshooting the power supply on page 642 7 Open the left side of the instrument see procedur...

Page 623: ...en the left side Ensure that W60 W61 W62 W63 and W64 are tight Reconnect the power cord and check the instrument to see whether the problem is corrected If not proceed to step 2 2 Disconnect the power cord and turn the instrument off Replace W60 the ribbon cable that connects the A2 board to the display driver board Reconnect the power cord and check the display to see whether the problem is corre...

Page 624: ...gure 12 3 Location of 5V supply pins on J1 of A17 and J8 of A2 Figure 12 3 shows A2J8 connections on 8560 EC series Instruments Lines 2 5 and 42 44 supply 5V to the two LCD backlights Lines 1 and 41 supply 5V to the A17A1 Inverter board Lines 1 6 and 41 44 are identical on A17J1 ...

Page 625: ... power cord from the instrument before servicing these assemblies Failure to follow this precaution can represent a shock hazard which may result in personal injury The voltage potential at A6A1W3 is 9 kV If the cable must be disconnected always disconnect it at the CRT with caution Failure to properly discharge A6A1W3 may result in severe electrical shock to personnel and damage to the instrument...

Page 626: ...Chapter 12 625 Display Power Supply Section CRT Display 8560E Figure 12 4 Power Supply and CRT Block Diagram ...

Page 627: ...17 test connectors Table 12 1 Automatic Fault Isolation References Suspected Circuit Indicated by Automatic Fault Isolation Manual Procedure to Perform Check A2 Controller Blanking Signal Check All Power Supply Outputs Dead Power Supply steps 1 5 Check Buck Regulator Dead Power Supply steps 13 23 Check Buck Regulator Control Circuitry Dead Power Supply steps 11 21 Check High Voltage Supplies High ...

Page 628: ...nes A17J4 Revision MS5 Constant current Source MS1 Intensity input MS7 Intensity offset MS7 Blanking control MS8 A2J201 10 V reference test MS4 Switch drive test MS3 Buffered X Y DAC outputs MS2 MS7 X line generator test MS6 Y line generator test MS1 Intensity offset output MS8 A2J202 Revision MS1 X Y Z output offset MS3 MS4 MS7 X output amplifier MS7 Y output amplifier MS3 Blanking test MS4 Focus...

Page 629: ...igital section of the A2 controller assembly 7 Move the probe cable to A2J202 Press SOFT KEY 1 and wait 5 seconds 8 Press SOFT KEY 4 The results should be sent to the printer 9 Move the probe cable to A2J201 press SOFT KEY 1 and wait 5 seconds 10 Press SOFT KEY 4 The results will be sent to the printer 11 If a failure is indicated in any of these tests the fault lies on the A2 controller assembly ...

Page 630: ...g properly 4 If the CRT 110 VDC ON LED on the rear panel is lit the high voltage supplies should also be operating The high voltage supplies will be turned off if the HV SHUT_DOWN line is low The A6 power supply feeds 5 V to the A2 controller through W1 The A2 assembly distributes this 5 V to the A17 CRT driver through W7 A17 sends 5 V back to A6 as the HV SHUT_DOWN signal on W8 As a result A2 A17...

Page 631: ... 8 While observing the display press LINE to turn the spectrum analyzer off If a green flash appears on the display the CRT is probably working properly troubleshoot either the A2 controller or the A17 CRT driver 9 If a flash does not appear on the display the A2 controller A6A1 HV module A17 CRT driver or A18V1 CRT might be at fault ...

Page 632: ...not observed the A2 controller assembly is faulty 3 Repeat steps 1 and 2 with the oscilloscope probe on A2J202 pin 14 4 Set the oscilloscope to the following settings 5 Connect the positive probe lead to A2J202 pin 15 This is the blanking output 6 TTL level pulses should be observed If the signal is either always high or always low the display will be blanked suspect the A2 controller assembly 7 I...

Page 633: ...djustments or cable connections might be at fault 4 If the A2 controller assembly is not part number 08563 60017 perform the 16 MHz PLL adjustment in Chapter 2 If the 16 MHz CPU clock is off frequency the display will be distorted 5 Perform the Display Adjustment in Chapter 2 Isolate the problem to either the X or Y axis by noting the behavior of the adjustments If the line generator or fast zero ...

Page 634: ...adjustment A17R55 or A17R75 should change the ac component in both outputs by the same amount 11 If the display is a single dot check the base of A17Q18 for 10 3 V 0 3 V Verify the signals at TP11 TP14 TP12 and TP13 12 If signals are correct and cables to the CRT are good suspect the CRT ...

Page 635: ... a lesser effect and A17R21 Z FOCUS A17R26 X FOCUS and front panel adjustment press DISPLAY MORE 1 OF 2 FOCUS and turn knob have less effect on focus 5 If the focus of some areas of the screen are worse than normal continue with step 11 If no part of the screen can be brought to sharp focus continue with step 6 CRTs have some normal focus variation across their face 6 Turn off the analyzer and pla...

Page 636: ...ent when used with the A17R21 Z FOCUS changes the peak to peak voltage at TP9 by 25 V Access the intensity adjustment by pressing DISPLAY INTENSITY and turning the front panel knob 14 Set front panel intensity to minimum Set A17R21 Z FOCUS and A17R26 X FOCUS fully counterclockwise Verify that the peak to peak voltage at TP9 is about 40 Vp p due to X dynamic focus circuit 15 If circuit operation se...

Page 637: ...t check the BLANKING output of the A2 controller assembly and cable W7 6 If blanking pulses are present check A17TP10 with the oscilloscope The TP10 signal should vary with the front panel intensity adjustment and be approximately 55 Vp p maximum The signal will be composed of both blanking pulses and varying intensity levels for the lines being drawn If a proper signal is not present at A17TP10 c...

Page 638: ...id and cathode voltages are correct turn off the HP 8560E spectrum analyzer and check A17CR10 with an ohmmeter If A17CR10 is good suspect the A18V1 CRT 9 If the grid and cathode voltages are too low turn off the power and disconnect W8 from the base of A18V1 CRT and recheck the grid and cathode voltages 10 If the grid and cathode voltages are still too low refer to CRT Supply in this chapter and t...

Page 639: ... in all areas Use extreme care when servicing these assemblies Always disconnect the power cord from the instrument before servicing these assemblies Failure to follow this precaution can represent a shock hazard which may result in personal injury The voltage potential at A6A1W3 in 8560E instruments is 9 kV If the cable must be disconnected always disconnect it at the CRT with caution Failure to ...

Page 640: ...ied Power Supply Block Diagram NOTE The block diagram in Figure 12 7 shows the power supply in an 8560E instrument The power supply in 8560EC instruments is identical except that the CRT and high voltage supplies in an 8560EC are inactive and are not connected to CRT circuitry ...

Page 641: ... 18 18 33 18 18 18 15 V 19 19 32 19 19 19 28 V 20 20 20 20 28 V 21 21 21 21 PWR UP 29 22 15 V 23 23 28 23 23 23 15 V 24 24 27 24 24 24 15 V 25 25 26 25 25 25 15 V 26 26 25 26 26 26 5 V 27 27 24 27 27 27 5 V 28 28 23 28 28 28 5 V 29 29 22 29 29 29 5 V 30 30 21 30 30 30 D GND 20 31 31 20 31 31 D GND 19 32 32 19 32 32 A GND 18 33 33 18 33 33 33 A GND 17 34 34 17 34 34 34 D GND 16 35 35 16 35 35 35 D ...

Page 642: ...ns A14J1 pins A15J1 pins Table 12 4 Automatic Fault Isolation References Suspected Circuit Indicated by Automatic Fault Isolation Manual Procedure to Perform Check A2 Controller Blanking Signal Check All Power Supply Outputs Dead Power Supply steps 1 5 Check Buck Regulator Dead Power Supply steps 13 23 Check Buck Regulator Control Circuitry Dead Power Supply steps 11 21 Check High Voltage Supplies...

Page 643: ...6TP101 and A6TP301 2 Connect the negative lead of a DVM to A6TP301 3 Check TP308 for 5 V 4 Check TP302 for 15 V 5 Check TP303 for 15 V 6 Check TP304 for 28 V 7 Check TP305 for 12 6 V 8 Measure the voltage at TP108 to verify the output of the input rectifier The voltage should be between 215 Vdc and 350 Vdc 9 If it is not within this range check the rear panel fuse input rectifier input filter and ...

Page 644: ...y 50 mA suspect a short in the buck regulator control circuitry or a shorted CR201 20 Check TP204 for an 80 kHz sawtooth 4 Vp p 21 Check TP203 and TP207 for 40 kHz square 12 Vp p If the waveforms at either TP203 or TP207 are bad one of the FETs in the DC DC Converter is probably defective 22 Check TP105 and TP106 for a 12 Vp p sawtooth waveform that is flattened at the bottom If the waveform is a ...

Page 645: ... Seconds Kick Start See function blocks G H and L of A6 power supply schematic diagram in the component level information binder If there is a short on the power supply or on one of the other assemblies the power supply will attempt to kick start Every 1 5 seconds the supply will attempt to start but will be shut down by a fault condition The kick start and bias circuits provide power for the cont...

Page 646: ...g properly the output of U306A should be near 13 Vdc 12 Check output of U302 its output should be high if the feedback circuit is working properly High Voltage Supplies 8560E 1 Press LINE to turn spectrum analyzer off disconnect the power cord and remove the power supply shield 2 Connect the negative lead of a DVM to A6TP401 and positive lead to A6TP405 3 Press LINE to turn spectrum analyzer on 4 ...

Page 647: ... from a winding on the A6A1 HV module The CRT supply operates at approximately 30 kHz The exact frequency is determined by the inductance of the primary winding of A6A1T1 and A6C407 The supply will only operate if the HV_SHUT_DOWN line is high If the power supply keeps dropping out there is probably a short on the A17 CRT driver assembly 1 Disconnect W8 from A6J4 2 Connect an IC clip to U401 and c...

Page 648: ...he buck regulator control pulse width modulates the buck regulator and provides a synchronized signal to the DC DC converter control circuitry The buck regulator control has two feedback paths The first is the output of the buck regulator which provides coarse regulation The second is the feedback circuit which samples and compares the 5 Vdc output of the output rectifier U202B and associated circ...

Page 649: ...ram in the component level information binder The DC DC converter control circuitry divides the 80 kHz squarewave from U202A and generates two complementary 40 kHz squarewaves to drive the FETs in the DC DC converter Also U202D and its associated circuitry monitor the voltage across sense resistor R116 in the DC DC converter When the current through the FETs in the DC DC converter exceeds 1 8 A th...

Page 650: ...Chapter 12 649 Display Power Supply Section A6 Power Supply Assembly Figure 12 9 A17 CRT Driver Block Diagram Replace with sj129c ...

Page 651: ...650 Chapter12 Display Power Supply Section A6 Power Supply Assembly ...

Page 652: ...Chapter 12 651 Display Power Supply Section A6 Power Supply Assembly Figure 12 10 A6 Power Supply Block Diagram Replace with sj121c ...

Page 653: ...652 Chapter12 Display Power Supply Section A6 Power Supply Assembly ...

Page 654: ...653 13 Component Level Information Packets ...

Page 655: ...cal Agilent Technologies Sales or Service Office Use the CLIP part numbers provided in Table 14 1 A single volume CLIP set that contains all repairable assemblies for the 8560 E series and EC series is also available Order this CLIP set by using part number 5967 8582 With the exception of the A2 controller board the A1A1 keyboard and the A17 CRT Driver board the E series assemblies for which CLIPs...

Page 656: ...3517A and above 08563 60021 08563 60069 08563 60078 08563 90056 08563 90102 08563 90117 A3 Interface Assembly E series Option 007 3310A through 3337A 3350A through 3515A 3517A and above 08563 60033 08563 60070 08563 60078 08563 90075 08563 90103 08563 90117 A3 Interface Assembly E and EC series 3611A and above 08563 60098 08563 90017 A4 Log Amplifier Cal Osc 3213A through 3246A 3301A through 3406A...

Page 657: ...gh 3432A 3436A through 3450A 3514A through 3517A 3551A through 3821A and above 08563 60043 08563 60055 08563 60082 08563 60085 08563 60133 08563 90070 08563 90111 08563 90121 08563 90128 08563 90200 A15 RF Board Standard with SIG ID 3213A through 3221A 3240A through 3304A 3305A through 3432A 3436A through 3450A 3514A through 3517A 3551A through 3821A and above 08563 60016 08563 60036 08563 60046 0...

Page 658: ...iver E series 3213A through 3221A through 3432A 3442A through 3741A and above 08562 60165 08562 60166 08563 60077 08563 60122 08562 90187 08562 90193 08563 90113 8563 90182 A19 HP IB 3213A and above 08562 60042 08562 90115 Denotes refurbished board assemblies available Refurbished board assembly part numbers have 9 as the second digit of the suffix For example 08563 69032 is the refurbished part n...

Page 659: ...658 Chapter13 Component Level Information Packets Introduction Figure 13 1 HP 8560 EC Series Interconnect Block Diagram Replace with sj15c ...

Page 660: ...Chapter 13 659 Component Level Information Packets Introduction ...

Page 661: ...660 Chapter13 Component Level Information Packets Introduction Figure 13 2 HP 8560 E Series Interconnect Block Diagram Replace with e1abe083 ...

Page 662: ...TAM test equipment list 58 TAM vs manual adjustments 58 using TAM 57 adjustments recommended test equipment 133 AFI synthesizer 516 AM FM demodulator troubleshooting 425 460 analog bus drivers troubleshooting 385 analog bus timing 386 audio amplifier troubleshooting 460 automatic IF adjustment 415 automatic IF adjustment parameters 416 B blank display 471 621 blanking 476 blanking signal 631 C cab...

Page 663: ...5 255 257 front frame EC assembly 150 G general information ESD requirements 41 HP 8560E options information 27 HP sales and service offices 46 packaging material part numbers 44 returning instruments for service 43 serial number label description 29 graticule problem 483 H harmonic number versus center frequency 556 I IF adjustment automatic 416 IF amplitude adjustments 134 IF assembly troublesho...

Page 664: ...5 3 kHz and 10 kHz problems 448 30 kHz problems 447 300 Hz to 3 kHz problems 453 resolution bandwidth performance test failures 420 RF block diagram 573 577 579 RF gain DACs 367 RF parts 241 RF section parts 253 rosenfell detector troubleshooting 377 RPG problems 360 RPG assembly 170 S sampler 563 sampler IF 543 563 sampler troubleshooting 512 sampling oscillator 534 538 sampling oscillator adjust...

Page 665: ...ages 300 to 316 302 YTO loop error messages 317 to 318 307 YTO loop settling error messages 351 to 354 310 troubleshooting error messages 298 troubleshooting blank CRT 628 troubleshooting blank LCD 621 troubleshooting blanking signal 631 troubleshooting blown line fuse 644 troubleshooting CRT focus 634 troubleshooting CRT intensity 636 troubleshooting dead power supply 642 troubleshooting dim LCD ...

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