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5. Log Amplifier Adjustments

5. Log Amplifier

Adjustments

Reference

Related Performance

Tests

Note

IF-Display Section

 Log Amplifier-Filter
 Log Amplifier-Detector

Scale Fidelity Test

The 

 Log Amplifier-Filter and 

 Log Amplifier Detector

are temperature compensated as a matched set at the factory. In
the event of a circuit failure, a new matched set must be ordered.
Contact your nearest HP Service Center.

Description

First, the 

 Log Amplifier-Detector ZERO adjustment is checked

and adjusted if necessary, then the 

 Log Amplifier-Filter is set

for center frequency by injecting a signal and adjusting the 
filter center adjustment for maximum DVM indication. The 
filter amplitude is adjusted by monitoring the output of the filter
control line shorted and not shorted to the + 

 supply. Next, log

fidelity (gain and offset of the log curve) is adjusted by adjusting the

-12 VTV and the PIN diode attenuator. Last, the linear gain step
adjustments are performed to set the proper amount of step gain in

the linear mode of operation.

Equipment

Procedure

S P E C T R U M   A N A L Y Z E R  

I

D I G I T A L   V O L T M E T E R

S Y N T H E S I Z E R   L E V E L

 

Figure 3-33. Log Amplifier Adjustments Setup

Digital Voltmeter (DVM) . . . . . . . . . . . . . . . . . . . . . . . . HP 
Frequency Synthesizer . . . . . . . . . . . . . . . . . . . . . . . . . HP 

1. Position instrument upright as shown in Figure 3-33, with top

cover removed.

2. Set LINE switch to ON and press 

(

INSTR PRESET

].

3. Key in 

[

FREQUENCY SPAN

) 

0 Hz, 

 

FREQUENCY

] 

7.6 MHz,

 

 

+ 10 

 

 10 

 and press LIN

pushbutton.

Adjustments 3-65

Содержание 8568B

Страница 1: ...Performance Tests and Adjustments Manual HP 8568B Spectrum Analyzer HEWLETT PACKARD HP Part No 08568 90118 Printed in USA September 1993 ...

Страница 2: ...ckard Company 1993 All Rights Reserved Reproduction adaptation or translation without prior written permission is prohibited except as allowed under the copyright laws 1212 Valley House Drive Rohnert Park CA 94928 4999 USA ...

Страница 3: ...r Buyer shall pay all shipping charges duties and taxes for products returned to Hewlett Packard from another country Hewlett Packard warrants that its software and firmware designated by Hewlett Packard for use with an 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...

Страница 4: ...ssistance Product maintenance agreements and other customer assistance agreements are available for Hewlett Rwkard products Fbr any assistance contact your nearest Hewlett Packard Sales and Service OJke ...

Страница 5: ...siderations Warning Before this instrument is switched on make sure it has been properly grounded through the protective conductor of the ac power cable to a socket outlet provided with protective earth contact Any interruption of the protective grounding conductor inside or outside the instrument or disconnection of the protective earth terminal can result in personal injury Warning There are man...

Страница 6: ...B Spectrum Analyzer are three manuals the Installation and Verification Manual the Operating and Programming Manual and the Performance Tests and Adjustments Manual General information installation specifications characteristics and operation verification Manual and remote operation including complete syntax and command description Accompanying this manual is the separate pocket sized Quick Refere...

Страница 7: ...e Noise Level Test 14 Residual Responses Test 15 Spurious Responses Test 16 Residual FM Test 17 Line Related Sidebands Tests 18 Calibrator Amplitude Accuracy Test 19 Fast Sweep Time Accuracy Test 20 ms 20 1st LO Output Amplitude Test 21 Frequency Reference Error Test Ihble 2 19 Performance Test Record Test 1 Center Frequency Readout Accuracy Test Test 2 Frequency Span Accuracy Test Test 3 Sweep Ti...

Страница 8: ...ts 6 Video Processor Adjustments 7 3 MHz Bandwidth Filter Adjustments 8 21 4 MHz Bandwidth Filter Adjustments 9 3 dB Bandwidth Adjustments 10 Step Gain and 18 4 MHz Local Oscillator Adjustments 11 Down Up Converter Adjustments 12 Time Base Adjustment SN 2840A and Below also 32 17AO5568 and Above 12 Time Base Adjustment SN 2848A to 3217A05567 13 20 MHz Reference Adjustments 14 249 MHz Phase Lock Os...

Страница 9: ...uracy Test p o Table 2 19 Performance Test Record 4 19 Test 5 6 dB Resolution Bandwidth Selectivity p o Ihble 2 19 Performance Test Record 4 21 Test 5 Impulse and Resolution Bandwidth Selectivity p o Table 2 19 Performance Test Record 4 22 Test 6 Impulse and Resolution Bandwidth Switching Uncertainty p o Iable 2 19 Performace Test Record 4 23 9 6 dB Resolution Bandwidth Adjustments 4 24 9 Impulse ...

Страница 10: ...Setup 2 22 Amplitude Fidelity Measurement 2 23 Average Noise Level Measurement 2 24 Residual Responses Measurement 2 25 Harmonic Distortion Test Setup 2 26 Intermodulation Distortion Test Setup 2 27 Intermodulation Distortion Products 2 28 Bandwidth Filter Slope Measurement 2 29 Slope Detected Residual FM 2 30 Peak to Peak Amplitude Measurement 2 31 Line Related Sidebands Measurement 2 32 Calibrat...

Страница 11: ...ents Setup 3 36 Location of Video Processor Adjustments 3 37 3 MHz Bandwidth Filter Adjustments Setup 3 38 Location of Center Symmetry and 10 Hz Amplitude Adjustments 3 39 Location of 3 MHz Peak Adjustments 3 40 21 4 MHz Bandwidth Filter Adjustments Setup 3 41 Location of A4A4 21 4 MHz LC Filter Adjustments 3 42 Location of A4A4 21 4 MHz Crystal Filter Adjustments 3 43 Location of A4AS 21 4 MHz LC...

Страница 12: ...tion Adjustment Waveforms 3 83 Location of Comb Generator Adjustments 3 84 Comb Teeth Display 3 85 Analog To Digital Converter Adjustments Setup 3 86 Location of Analog To Digital Converter Adjustments 3 87 Track and Hold Adjustments Setup 3 88 Location of Track and Hold Adjustments 3 89 Digital Storage Display Adjustments Setup 3 90 Location of Digital Storage Display Adjustments 3 91 Sample and ...

Страница 13: ...6 7 IF Section Bottom View 6 10 Contents 7 ...

Страница 14: ...omponents 3 4 Standard Value Replacement Capacitors 3 5 Standard Value Replacement 0 125 Resistors 3 6 Standard Value Replacement 0 5 Resistors 3 5 Initial Adjustment Positions 3 6 Initial Adjustment Positions 3 7 Parts for Low Noise DC Supply 3 8 Crystal Filter Bypass Network Configuration for A4A4 and A4A8 21 4 MHz 3 9 Crystal Filter Bypass Network Configuration for A4A7 3 MHz 4 l 6 dB Resolutio...

Страница 15: ...tages at many points in the instrument which can if contacted cause personal injury Be extremely careful Adjustments should be performed only by trained service personnel Power is still applied to this instrument with the LINE switch in STANDBY There is no OFF position on the LINE switch Before removing or installing any assembly or printed circuit board remove the power cord from the rear of both...

Страница 16: ...standard versions included in chapters two and three Information on Option 462 versions are located in Chapter 4 Option 462 6 dB Bandwidths Test 4 6 dB Resolution Bandwidth Accuracy Test Test 5 6 dB Resolution Selectivity Test Adjustment 9 6 dB Bandwidth Adjustments Impulse Bandwidths Test 4 Impulse and Resolution Bandwidth Accuracy Test Test 5 Impulse and Resolution Selectivity Test Test 6 Impuls...

Страница 17: ... min HP 8340A may be substituted Frequency 200 Hz to 80 MHz Stability f 1 x lo day Amplitude Range 13 to 86 dBm with 0 01 dB HP 3335A resolution Attenuator Accuracy f0 07 dB 13 to 47 dBm Pulse Width 10 nsec to 250 nsec Rise and Fall Times 6 nsec Output Level 2 5V Output Sine Wave and Triangle Wave 2Vp p Range 100 Hz to 500 kHz Sweep Function Available HP 8116A HP 3312A Output 1 2 5 or 10 MHz Accur...

Страница 18: ...igh Frequency Probe 10 MHz l10 GHz Compatible with HP 8757E Frequency 10 MHz to 18 GHz Sensitivity 30 dBm HP IB Compatible HP 5343A may be substituted Range lO MHz Resolution 2 x lo gate time Ext Time Base 1 2 5 or 10 MHz Frequency dc to 100 MHz Time Interval A B 100 nsec to 200 set Sensitivity 50 mV rms Range 30 mV to 5V p p Digitizing OSCOPE 4 Channel Frequency 100 MHz Sensitivity 005V Division ...

Страница 19: ......

Страница 20: ...fications for Equipment Substitution requency 200 Hz to 18 GHz rype N Connectors Impedance 500 BNC latness ho 25 dB Cut off Frequency 2400 MHz and 500 MHz Xejection 40 dB at 1750 MHz ht off Frequency 300 MHz Cut off Frequency 50 MHz Frequency 1 MHz to 1500 MHz backing 0 2 dB Required for preliminary display adjustments Zefer to Figure 70 Optional Xefer to Figure 71 Recommended Model HP 8491B Optio...

Страница 21: ...ter Tee SMB Male Connectors HP 1250 0670 X Adapter Type N m to N m HP1250 0778 X Adapter Type N m to BNC f 2 required HP1250 0780 X Adapter BNC Tee m f f HP1250 0781 X Adapter Type N m to SMA f HP1250 1250 X Adapter Type N f to BNC f 2 required HP1250 1474 X Adapter APC 3 5 f to APC 3 5 f HP1250 1749 X Adapter APC 3 5 f TO N f 2 required HP 1250 1745 BOARD EXTENDERS Extender 12 required Extender 1...

Страница 22: ...s of 15 Extender Board 12 contacts 2 rows of 6 Extender Board 50 contacts 2 rows of 25 Extender Board 36 contacts 2 rows of 18 HP Part Number 8 5 6 8 0 6 0 0 2 8 8 5 6 8 0 6 0 0 9 3 8 5 6 6 2 6 0 0 8 8 0 8 5 0 5 6 0 0 4 1 08505 60109 8 5 6 8 0 6 0 0 3 4 0 8 5 0 5 6 0 0 4 2 Figure l l Service Accessories HP Part Number 08568 60001 l 8 General Information ...

Страница 23: ... Run the Operation Verification Program 2 The Operation Verification Program verifies compliance with specifications of all tests it performs The tests not performed by the Operation Verification Program must be done manually and are as follows n Center Frequency Readout Accuracy n Spurious Responses H Fast Sweep Time Accuracy n 1st LO Output Amplitude Responses n Frequency Reference Error If the ...

Страница 24: ...o Center Frequency Readout 1 Center Frequency Readout Accuracy Test Frequency Spans 2 Frequency Span Accuracy Test Sweep Time Accuracy 220 ms 3 Sweep Time Accuracy Test 3 dB Bandwidths 4 Resolution Bandwidth Accuracy Test Bandwidth Shape 5 Resolution Bandwidth Selectivity Test Bandwidth Amplitudes 6 Resolution Bandwidth Switching Uncertainty Test Input Attenuator Accuracay 7 Input Attenuator Switc...

Страница 25: ...lized temperature A synthesized signal source that is phase locked to a known frequency standard is used to input a signal to the analyzer The frequency readout of the analyzer is compared to the actual input frequency for several different frequency settings over the analyzer s range The signal source is phase locked to a standard known to be as accurate as the analyzer s internal frequency refer...

Страница 26: ...Press 1tds r PRESET Set the synthesized sweeper for a 100 000 MHz signal at a level of approximately 0 dBm Connect equipment as shown in Figure 2 l Set analyzer CENTER FREQUENCY and FREQUENCY SPAN and synthesized sweeper frequency according to Table 2 2 At each setting press PEAK SEARCH to center the signal Adjust CREFERENCE LEVEL as necessary to place signal peak at a convenient level Record the ...

Страница 27: ...10 MHz FREQ REFERENCE rear panel output for frequency standard and repeat test Ihble 2 2 Center Frequency Readout Error Test Record Spectrum Analyzer I FREQUENCYSPAN I CENTER FREQumcy Center Readout MHz MHZ 100 MHz 100 MHz 100 MHz 10 MHz 10 MHz 10 MHz 10 MHz 1 MHz 100 kHz 10 kHz I 100 500 1000 100 500 1000 1500 1000 1000 1000 I Min Measured 98 498 998 99 8 499 8 999 8 1499 8 999 98 999 998 999 999...

Страница 28: ...a frequency at 5 of sweep and then at 95 of sweep These frequencies correspond to half a division from each edge of the CRT The spans chosen are based on the architecture of the HP 8568B RF hardware Span Assembly Being Swept 200 Hz 100 kHz 100 1 kHz 1 MHz 1 01 MHz 20 MHz 20 1 MHz 1 5 GHz VT0 Oscillator low divide VT0 Oscillator low divide VT0 Oscillator high divide VT0 Oscillator high divide FM Co...

Страница 29: ...0 090 MHz 9 Press MARKER PEAK SEARCH and record marker reading under FREQ D of Table 2 3 10 Repeat the span measurement procedure of steps 6 through 9 for each frequency span listed in Table 2 3 11 Determine the frequency difference between the two measured points Enter this value under the A DUT column in fable 2 3 12 The frequency span error is the difference between A DUT and A SYNTH See table ...

Страница 30: ...ec Min Max 1 0 Hz 10 Hz 5000 Hz 5000 Hz 5 005 Hz 5 005 Hz 50 000 Hz 50 000 Hz 23 230 Hz 23 230 Hz 460 000 Hz 460 000 Hz 462 300 Hz 462 300 Hz Note The specification in Table 2 4 was derived using the following formula For spans 1 MHz the spec is 02 A synth freq 005 span For spans 2 1 MHz the spec is 05 A synth freq 005 span 2 8 Performance Tests ...

Страница 31: ...e interval mode to determine the pen down sweep time interval of the PENLIFT RECORDER OUTPUT The penlift output voltage level corresponds directly to the sweeping of the analyzer pen down OV and not sweeping of the analyzer pen up 15V A DVM is used to set the appropriate trigger level for the counter Alternate Procedure Perform this procedure if the equipment for the preferred procedure is unavail...

Страница 32: ...IME vernier control to 9 o clock d Set SEPXOM A switch to COM A position e Depress T I A B switch making sure the blue shift key is out f Set Channel A trigger level to trigger on negative slope g Set Channel B trigger level to trigger on positive slope h Set both Channel A and Channel B ac dc switches to de i Connect the digital voltmeter to Channel A TRIGGER LEVEL OUT Be sure to ground the DVM p...

Страница 33: ...e setting in Table 2 5 Ihble 2 5 Sweep Time Accuracy Sweep Times 220 ms SWEEP TIME Marker A Time Min Measured 20 ms 18 ms 50 ms 45 ms 100 ms 90 ms 500 ms 450 ms 1s 900 ms 8 Press MARKER NORMAL 9 Use J to place the marker at the second vertical graticule 10 Press FiHIFT Xi FF 11 Set analyzer SWEEP TIME to 20 s Allow the universal counter enough time to settle at this sweep time 12 Note the measured...

Страница 34: ...be subtracted from the SWEEP GEN time measured in step 19 Adding the start up time to the SWEEP TIME setting effectively subtracts it from the SWEEP GEN time 18 Press MARKER OFF Sweep Time 19 Press i REST three times and note the SWEEP GEN Measurement reading The limits for the SWEEP GEN reading are listed in Table 2 7 For example assume the start up time measured in step 17 was 700 US for a SWEEP...

Страница 35: ...ENCY SPAN m 5 MHz 3 MHz R E F E R E N C E LEVEL 10 dBm Press SCALE LIN pushbutton Press csHIFT my resolution bandwidth Adjust REFERENCE LEVEL to position peak of signal trace at reference level top graticule line Press SWEEP SINGLE Press MARKER ml and place marker at peak of signal trace with DATA knob Press MARKER In and position movable marker 3 dB down from the stationary marker on the positive...

Страница 36: ... limits shown in the table REW 3 MHz 1 MHz 300 kHz 100 kHz 30 kHz 10 kHz 3 kHz 1 kHz 300 Hz 100 Hz 30 Hz 10 Hz T1 Ihble 2 8 Bandwidth Accuracy FREQUENCY SPAN MARKER A Readout of 3 dl 5 MHz 2 MHz 500 kHz 200 kHz 50 kHz 20 kHz 5 kHz 2 kHz 500 Hz 200 Hz 100 Hz 100 Hz Min 2 400 MHz 900 kHz 270 0 kHz 90 0 kHz 27 00 kHz 9 00 kHz 2 700 kHz 800 Hz 240 Hz 80 Hz 24 Hz 8 Hz Measured 3 Bandwidth Max 3 600 MHz...

Страница 37: ......

Страница 38: ...ution bandwidth setting by the procedure of steps 4 through 6 and record the value in fable 2 9 8 Record the 3 dB bandwidths from Table 2 8 in Table 2 9 9 Calculate the bandwidth selectivity for each setting by dividing the 60 dB bandwidth by the 3 dB bandwidth The bandwidth ratios should be less than the maximum values shown in fable 2 9 10 The 60 dB bandwidth for the 10 Hz resolution bandwidth s...

Страница 39: ...ty Selectivity Ratio Bandwidth Bandwidth 60 dB BW 3dBBW 3 MHz 20 MHz 100 Hz 15 l 1 MHz 15 MHz 300 Hz 15 l 300 kHz 5 MHz AUTO 15 l 100 kHz 2 MHz AUTO 15 l 30 kHz 500 kHz AUTO 13 l 10 kHz 200 kHz AUTO 13 l 3 kHz 50 kHz AUTO 13 l 1 kHz 10 kHz AUTO 11 l 300 Hz 5 kHz AUTO 11 l 100 Hz 2 kHz AUTO 11 l 30 Hz 500 Hz AUTO 11 l 10 Hz 100 HZ AUTO 60 dB points separated by cl00 Hz Performance Tests 2 17 ...

Страница 40: ...T signal is applied to the input of the spectrum analyzer The deviation in peak amplitude of the signal trace is then measured as each resolution bandwidth filter is switched in None Required 1 Press INSTR PRESET 2 Connect CAL OUTPUT to SIGNAL INPUT 2 3 Key in the following control settings CENTER FREQUENCY F R E Q U E N C Y SPAN REFERENCE LEVEL sTE 2 0 5 8 1 4 Press LOG ENTER dB bIvj and key in 1...

Страница 41: ...witching Uncertainty 1 MHz 5 MHz 3 MHz 5 MHz 300 kHz 5 MHz 100 kHz 500 kHz 30 kHz 500 kHz 10 kHz 50 kHz 3 kHz 50 kHz 1 kHz 10 kHz 300 Hz 1 kHz 100 Hz 1 kHz 30 Hz 200 Hz 10 Hz 100 Hz Deviation MKR A Readout dB 0 ref Allowable Deviation dB 0 ref IlIl 00 Zto 50 Ito Ito f0 50 f0 50 Ito dZo 50 Ito f0 80 f2 00 Performance Tests 2 l 9 ...

Страница 42: ......

Страница 43: ...not exceed l O dB at any setting HKR A 0 Hz Sl i 40 i dBm l ATTi 20 dB r IB i CENTER 28 0000 MHz SPAN 100 0 ktiz RES BY 30 kHz VBW 100 Hz SVP 500 n3mP z Figure 2 10 Attenuator Switching Uncertainty Measure Ihble 2 l 1 Input Attenuator Switching Uncertainty nent Lz REFERENCE LEVEL Frequency Deviation Corrected Allowable Wm Synthesizer MARKER A Deviation Deviation Amplitude Amplitude WV 9 Wm W 10 50...

Страница 44: ... in trace amplitude The test is divided into three parts First the response is tested from 20 MHz to 1 5 GHz with a power meter leveled synthesized sweeper Next a frequency synthesizer is used to check the response from 100 kHz to 20 MHz Finally SIGNAL INPUT 1 is tested from 100 Hz to 100 kHz with a function generator R E C O R D E R O U T P U T POWER METER SPECTRUM ANALYZER I GNAL N P U T I ADA P...

Страница 45: ...rocedure 20 MHz to 1 5 GHz 1 2 3 4 Depress RANGE HOLD button on power meter 5 Select METER leveling on synthesized sweeper 6 Key in the following spectrum analyzer settings Press NSTR PRESET on spectrum analyzer and synthesized sweeper Set controls as follows Power Meter MODE dBm RANGE HOLD OFF CAL FACTOR 100 Synthesized Sweeper START FREQ 20 MHz STOP FREQ 1 5 GHz SWEEP SWEEP TIME 120 s POWER LEVE...

Страница 46: ...N 10 dB I dB I I DL B dBm I START 20 nnz STOP 1500 MHZ RES BW 3 Mnt VBW 1 MHZ SWP 20 mssc Figure 2 12 Frequency Response Measurement 20 MHz to 1 5 GHz 12 Press DISPLAY LINE ENTER on the spectrum analyzer Use the Display Line to measure the maximum and minimum points on the trace Record measurements below SIGNAL INPUT 2 20 MHz to 1 5 GHz Maximum dBm Minimum dBm 13 To check SIGNAL INPUT 1 use the ty...

Страница 47: ...w SIGNAL INPUT 1 20 MHz to 500 GHz Maximum dBm Minimum dBm 100 kHz to 20 MHz 17 Set the frequency synthesizer controls as follows FREQUENCY 20 MHz SWEEP WIDTH 19 9 MHz AMPLITUDE 2 dBm Option 001 4 dBm 18 Connect equipment as shown in Figure 2 13 The output of the frequency synthesizer should be connected to SIGNAL INPUT 1 Option 001 Use HP 11852 Minimum Loss Pad and adapters SPECTRUM ANALYZER 8IHI...

Страница 48: ......

Страница 49: ...on Option 001 Do not use HP 11852A Minimum Loss Pad Set frequency synthesizer output amplitude to 2 dBm 28 Press TRACE A CCLEAR WRITE and DISPLAY LINE OFF on spectrum analyzer 29 Set frequency synthesizer FREQUENCY to 20 MHz Set spectrum analyzer CENTER FREQUENCY_ to 20 MHz and FREQUENCY SPAN to 1 MHz 30 Repeat steps 22 through 24 31 After completion of sweep press DISPLAY LINE ENTER on the spectr...

Страница 50: ...e last two graticule lines right side on the signal analyzer display Adjust AMPLITUDE VERNIER on the function generator until the peak of the signal is at the reference graticule line on the spectrum analyzer display Press LOG CENTER dB DIv_ 1 dB on the spectrum analyzer Press DISPLAY LINE ENTER and set the Display Line to the level recorded for 100 kHz in step 25 Adjust function generator AMPLITU...

Страница 51: ...00 button FREQUENCY 10 MODULATION all out 46 Adjust function generator FREQUENCY as necessary to place signal near center graticule line and adjust AMPLITUDE VERNIER to place peak of signal at Display Line 47 Key in the following spectrum analyzer settings FREQUENCY SPAN 100 Hz TT 30 Hz 48 Set CF STEP SIZE to 100 Hz Step spectrum analyzer C E N T E R FFIEQUENCY from 1 kHz to 100 Hz with a while se...

Страница 52: ...dBm Overall Minimum dBm Overall Deviation dBm SIGNAL INPUT 2 100 kHz to 1 5 GHz from steps 12 or 31 Spec 2 dB Overall Maximum dBm Overall Minimum dBm Overall Deviation dBm 50 Subtract the lowest minimum level greatest negative from the highest maximum least negative measurement recorded in steps indicated The result should not exceed 3 dB SIGNAL INPUT 1 100 Hz to 1 5 GHz from steps 15 16 25 42 or ...

Страница 53: ......

Страница 54: ...9 RF Gain Uncertainty Test h I 1 I I I Figure 2 16 RF Gain Uncertainty Measurement 2 32 Performance Tests ...

Страница 55: ...as shown Range Uncertainty uncorrected 20 30 C 0 dBm to 55 9 dBm Res BW 230 Hz f0 6 dB Res BW 10 Hz h1 6 dB 56 0 dBm to 129 9 dBm Res BW 230 Hz f1 0 dB Res BW 10 Hz f2 0 dB Description The IF gain steps are tested over the entire range from 0 dBm to 129 9 dBm using an RF substitution method The 10 dB 2 dB and 0 1 dB steps are compared against a calibrated signal source provided by an HP 3335A Freq...

Страница 56: ...CY 20 001 MHZ CFREQUENCY SPAN 2 kHz Press MARKER PEAK SEARCH or adjust CENTER FREQUENCY to center signal trace on display Set analyzer as follows V DEO 100 Hz j 1 1 kHz LOG CENTER dB DIv 1 dB Press MARKER PEAK SEARCH Press SHIFT m I to permit extended reference level settings Set the analyzer REFERENCE LEVEL VIDEO and frequency synthesizer amplitude according to Table 2 12 settings Use the frequen...

Страница 57: ... E LEVEL Pm 0 10 2 0 3 0 4 0 5 0 6 0 7 0 8 0 32 9 0 42 100 52 110 62 120 72 Frequency Synthesizer Amplitude Pm 2 12 22 32 42 52 62 72 v 100 100 100 100 100 100 10 10 100 100 10 10 10 Deviation Marker A Amplitude WV 0 ref Figure 2 18 IF Gain Uncertainty Measurement Performance Tests 2 35 ...

Страница 58: ...EFERENCE LEVEL and the frequency synthesizer amplitude according to Iable 2 13 At each setting note the MKR A amplitude and record it in the table lhble 2 13 IF Gain Uncertainty 2 dB Steps LREFERENCE LEVEL Frequency Deviation CdBm Synthesizer MARKER A 1 9 3 9 5 9 7 9 9 9 Amplitude Amplitude Wm W 9 3 9 0 ref 5 9 7 9 9 9 11 9 YKRAE Hz rp REF 1 0 dBm AtfEN 10 dB 0 02 dB 1 m CENTER 22 001 03 Nbb SPAM ...

Страница 59: ... in the table 23 Find the largest positive deviation and the largest negative deviation for reference level settings from 0 dBm to 70 dBm in Table 2 12 Also find the largest positive and negative deviations for the last five settings in the table A B Reference Level Range 0 to 70 dBm 80 to 120 dBm Largest Positive Deviation dB dB Largest Negative Deviation dB dB 24 Find the largest positive and ne...

Страница 60: ... 00 1 1 3 10 1 2 3 20 1 3 3 30 1 4 3 40 1 5 3 50 1 6 3 60 1 7 3 70 1 8 3 80 1 9 3 90 25 The sum of the positive deviations recorded in A C and D should not exceed 0 6 dB 26 The sum of the negative deviations recorded in A C and D should not be less than 0 6 dB 27 The sum of the positive deviations recorded in A B C and D should not exceed 1 0 dB 28 The sum of the negative deviations recorded in A ...

Страница 61: ......

Страница 62: ...Z CENTER 100 000 MHZ SPAN 100 kHZ SPAN 100 kHZ RES BW 30 kliz RES BW 30 kHz VBW 1 0 0 kHz VBW 1 0 0 kHz SWP 20 0 nl ec SWP 20 0 nl ec Figure 2 20 Log Scale Switching Uncertainty Measurement Figure 2 20 Log Scale Switching Uncertainty Measurement able 2 15 Log Scale Switching Uncertainty SCALE dB DIV 1 2 5 10 Allowable Deviation WV 0 ref f0 5 f0 5 f0 5 2 40 Performance Tests ...

Страница 63: ...dB display 20 30 C 5 1 5 dB max over 0 to 90 dB display Linear f3 of Reference Level for top 9 l 2 divisions of display Description Amplitude fidelity in log and linear modes is tested by decreasing the signal level to the spectrum analyzer in 10 dB steps with a calibrated signal source and measuring the displayed amplitude change with the analyzer s MARKER A function SYNTHESIZER LEVEL f GENERA OR...

Страница 64: ...yzer settings FREQUENCY SPAN O Hz Xi 1 Hz 6 Press MARKER A Step the frequency synthesizer output amplitude from 10 dBm to 80 dBm in 10 dB steps noting the MARKER A amplitude a negative value at each step and recording it in column 2 of fable 2 16 Allow several sweeps after each step for the video filtered trace to reach its final amplitude see Figure 2 22 7 Subtract the value in column 1 from the ...

Страница 65: ...asurement Linear Fidelity 10 Key in analyzer settings as follows jEGi 300 Hz FREQUENCY SPAN M I MHz 1 MHz 11 Set the frequency synthesizer for an output power level of 10 dBm 12 Press SCALE LIN pushbutton Press MARKER CPEAK SEARCHJ MKR to center the signal on the display 13 Set FREQUENCY SPAN to 0 Hz and VlDEo to 1 Hz Press iYiF XF6 resolution bandwidth MARKER a 14 Decrease frequency synthesizer o...

Страница 66: ...ity Test Ihble 2 17 Linear Amplitude Fidelity Frequency MARKER A Allowable Range Synthesizer Amplitude f3 of Reference Level Amplitude dB W 1 MW 1 Min Max I I I I I I I 0 10 87 9 21 1 0 23 10 17 72 2 44 Performance Tests ...

Страница 67: ...at several frequencies with no input signal applied 50 Ohm Termination HP 11593A 1 2 3 Press NsTR PRESET Connect CAL OUTPUT to SIGNAL INPUT 2 Press m Adjust AMPTD CAL for a MARKER amplitude of 10 00 dBm 50 02 dB 4 5 Press NSTR PRESET Disconnect CAL OUTPUT from analyzer Terminate SIGNAL INPUT 2 with a 509 coaxial termination 6 Key in spectrum analyzer settings as follows CATTEN 0 dB CENTER FREQUENC...

Страница 68: ...ould be c 112 dBm dBm 10 Change CENTER FREQUENCY to 1 001 MHz Follow the procedure to steps 7 through 9 to determine the average noise level The value should be c 135 dBm dBm 11 Change CENTER FREQUENCY to 1501 Mhz Follow the procedure of steps 7 through 9 to determine the average noise level The value should be 135 dBm dBm 2 46 Performance Tests ...

Страница 69: ...2 Press IRECALL J Adjust AMPTD CAL for a MARKER amplitude of 10 00 dbm f0 02 dB 4 5 Press QNSTR PRESET Disconnect CAL OUTPUT from analyzer Terminate SIGNAL INPUT 2 with a 50 ohm coaxial termination 6 Key in control settings as follows 7 8 FREQUENCY 50 MHz CREFERENCE LEVEL 60dBm CENTER FREQUENCY 25 MHz CF STEP SIZE 45 MHz km 1 kHz EGG 3 kHz ATTEN 0 dB Press DISPLAY LINE CENTER_ and key in 105 dBm R...

Страница 70: ... 105 dBm If a response appears marginal do the following to determine whether or not it exceeds the specification a Press ISAVE_ 0 b Press MARKER NORMAL and place the marker on the peak of the response in question c Press MARKER Ijj then activate SWEEP m d Reduce FREQUENCY SPAN to 1 MHz or less The amplitude of the response should be c 105 dBm below the display line e Press RECALL iJ to resume the...

Страница 71: ...r a signal 30 dBm at the mixer and 210 MHz second harmonic distortion is 70 dB down 60 dB down for signals 10 MHz Third Order Intermodulation Distortion For two signals each 30 dB at the mixer third order intermodulation products are Description Harmonic distortion second and third is tested using a signal source and a low pass filter The LPF insures that the harmonics measured are generated by th...

Страница 72: ... to BNC f HP 1250 1474 Directional Bridge HP 8721A Lowpass Filter 50 MHz 2 required HP 0955 0306 Procedure Harmonic Distortion 1 Connect equipment as shown in Figure 2 25 2 On the spectrum analyzer press INSTR PRESET Set the controls of the spectrum analyzer as follows CENTER FREQUENCY 280 MHz FREQUENCY SPAN 10 kHz REFERENCE LEVEL 20 dBm 3 On the synthesized sweeper key in NSTR PRESET Icw 280 MHz ...

Страница 73: ...he spectrum analyzer key in MARKER loFF CCENTER FREQUENCY 280 MHz REFERENCE LEVEL 30 dBm DISPLAY LINE ENTER 105 dBm MARKER CPEAK SEARCH to position a marker on the peak of the displayed 280 MHz signal 9 On the synthesized sweeper press POWER LEVEL and use the ENTRY knob to adjust the amplitude of the displayed 280 MHz signal for a marker indication of 30 00 dBm 40 0 dBm at the input mixer with 10 ...

Страница 74: ...key in FREQUENCY 29 MHz AMPLITUDE 4 dBm Readjust the signal amplitude as necessary to position the peak of the displayed 29 MHz signal at the top CRT 15 Set the controls of the spectrum analyzer as follows CENTER FREQUENCY 29 MHz FREQUENCY SPAN 500 Hz 16 On the spectrum analyzer key in DISPLAY LINE ENTER 100 dBm MARKER PEAK SEARCH to position a marker on the peak of the displayed 29 MHz signal 17 ...

Страница 75: ...ay line GO dB below the input signals TO1 Distortion 1 MHz separation 30 MHz dBm 21 On the spectrum analyzer key in CENTER FREQUENCY 28 MHz MARKER PEAK SEARCH to position a marker at the peak of the 28 MHz third order intermodulation product The response should be below the display line 80 dB below the input signals TO1 Distortion 1 MHz separation 30 MHz dBm fl fz S E C O N D H A R M O N I C S F R...

Страница 76: ...ey in FREQUENCY 29 MHz AMPLITUDE and then decrease the amplitude of the 29 MHz signal by 13 0 dB from the current setting 29 Set the controls of the spectrum analyzer as follows CENTER FREQUENCY 29 MHz FREQUENCY SPAN 500 Hz REFERENCE LEVEL 33 dBm MARKER OFF 30 On the spectrum analyzer key in DISPLAY LINE ml 105 dBm MARKER CPEAK SEARCH to position a marker on the peak of the displayed 29 MHz signal...

Страница 77: ...NCY 59 MHz MARKER PEAK SEARCH to position a second marker at the peak of the 59 MHz second order intermodulation distortion product The response should be below the display line 75 dB below the total input power SO1 Distortion 1 MHz separation 30 MHz dBm Performance Tests 2 55 ...

Страница 78: ...nal to the residual FM Equipment None Required Procedure 1 Press N TR PRESET 2 Connect CAL OUTPUT to SIGNAL INPUT 2 3 Press RECALL 8 and adjust AMPTD CAL for a MARKER amplitude of 10 00 dBm ho 02 dB 4 Press CRECALL 9 and adjust FREQ ZERO for a maximum amplitude trace 5 Set PREFERENCE LEVEL to 10 dBm Adjust FREQ ZERO counterclockwise until trace is at the center graticule line 6 Set FREQUENCY SPAN ...

Страница 79: ...g the MARKER A amplitude by the MARKER A frequency filter slope MARKER A amplitude MARKER Afrequency dB Hz 9 Press SWEEP CONT mj IOFF 10 Change FREQUENCY SPAN to 0 Hz Readjust FREQ ZERO if necessary to position the trace at the center graticule line The amplitude variations of the trace see Figure 2 29 represent the analyzer residual FM Performance Tests 2 57 ...

Страница 80: ...idual FM 11 Press SWEEP CRINGLE and wait for completion of the sweep 12 Press MARKER PEAK SEARCH_ Press DISPLAY LINE m and position the display line at the lowest point on the trace Figure 2 30 Peak to Peak Amplitude Measurement 2 58 Performance Tests ...

Страница 81: ...ecord its absolute value MARKER A amplitude p p amplitude dB 14 Divide the peak to peak amplitude by the slope computed in step 8 to obtain the residual FM p p amplitude filter slope residual FM dB dB Hz Hz residual FM The residual FM should be less than 3 Hz 15 Press NSTR PRESET 16 Press Cm 9 and adjust FREQ ZERO for a maximum amplitude trace Performance Tests 2 59 ...

Страница 82: ...e of 10 00 dBm f0 02 dB Press NSTR PRESET Key in the following analyzer settings CENTER FREQUENCY 20 MHZ REFERENCE LEVEL 10 dBm CFREQUENCY S P A N 600 Hz Wait for completion of sweep then press MARKER P E A K SEARCH jj Press SHIFT 1G SWEEP i7ZZ 10 j Iv to initiate video averaging of 10 sweeps Wait for completion of sweeps Press MARKER PEAK SEARCH and position movable marker at the peak of each lin...

Страница 83: ...l tO 02 dB CENTER FREQUENCY 20 MHz PREFERENCE L E V E L 1 0 dBm FREQUENCY SPAN 3 kHz Wait for completion of the sweep then press MARKER P E A K SEARCH Press SHIFT VlDEo G SWEEP 1 10 cm Iv to initiate video averaging of 10 sweeps Wait for completion of sweeps Press MARKER SPEAK SEARCH and position movable marker at the peak of each line related sideband 400 Hz 800 Hz and 1200 Hz The MARKER A amplit...

Страница 84: ...ignal is measured with a power meter SPECTRUW ANILYZER Figure 2 32 Calibrator Amplitude Accuracy Test Setup Equipment Power Meter HP 436A Power Sensor HP 8482A Adapter Type N f to BNC m HP 1250 0077 Procedure 1 Connect equipment as shown in Figure 2 32 2 Measure output level of the CAL OUTPUT signal The value should be 10 0 dBm ho 3 dB dBm 2 62 Performance Tests ...

Страница 85: ... for sweep times 20 ms is tested by checking the spacing of the signal peaks on the displayed waveform SPECTRUM ANALYZER SYNTHESIZED SWEEPER Figure 2 33 Fast Sweep Time Accuracy 20 ms Test Setup Equipment Function Generator HP 3312A Universal Counter HP 5316A Signal Generator HP 8340A Procedure 1 Connect equipment as shown in Figure 2 33 2 Press QNSTR PRESET on spectrum analyzer 3 Key in analyzer ...

Страница 86: ... for a counter reading of 2 00 f0 02 kHz 10 Adjust spectrum analyzer TRIGGER LEVEL to place a peak of the triangular waveform on the first graticule from the left edge of the CRT display as a reference Adjust function generator amplitude if necessary to provide a signal large enough to produce a stable display The fifth peak from the reference should be within l 0 5 division of the sixth graticule...

Страница 87: ...cy Test 20 ms able 2 18 Fast Sweep Time Accuracy 20 ms SWEEP TIME Function Generator Frequency Sweep Time Error ww divisions 5 ms 2 00 f0 02 2 ms 5 00 f0 05 1 ms 10 0 fO 1 200 ps 50 0 Iko 5 100 Ls 100 fl Performance Tests 2 65 ...

Страница 88: ...Figure 2 35 1st LO Output Amplitude Test Setup Equipment Power Meter HP 436A Power Sensor HP 8482A Procedure 1 Press INSTR PRESET 2 Set SWEEP TIME to 100 seconds 3 Calibrate power meter and sensor Connect equipment as shown in Figure 2 35 4 Observe the meter indication as the analyzer makes a complete sweep The indication should be 4 dBm across the full sweep range dBm 5 Replace 50 ohm terminator ...

Страница 89: ...in 72 hours of operation after being off for a period not exceeding 24 hours Care must be taken not to disturb the spectrum analyzer during the 24 hour test interval since the frequency reference is sensitive to shock and vibration The frequency reference should remain within its attained aging rate if the instrument is left on the instrument orientation with respect to the earth s magnetic field ...

Страница 90: ......

Страница 91: ... lhble 2 19 Performance Tkst Record Hewlett Packard Company Model HP 8568B Serial No IF Display Section RF Section Tested by Report No Date Performance Tests 2 69 ...

Страница 92: ... ER FREQUENCY ww 100 MC EXT TRIG 1 2 5 or 10 MHz trigger signal 1 100 MHz 100 100 MHz 500 100 MHz 1000 10 MHz 100 10 MHz 500 10 MHz 1000 10 MHz 1500 1 MHz 1000 100 kHz 1000 10 kHz 1000 T Min 98 498 998 99 8 499 8 999 8 1499 8 999 98 999 998 999 9998 Center Readout W W Measured Max 102 502 1002 100 2 500 2 1000 2 1500 2 1000 02 1000 002 1000 0002 2 70 Performance Tests ...

Страница 93: ...MHz 900 000kHz 100 MHz 99 550 550 MHz 100 450 500 MHz 909 000kHz 100 MHz 91 000000 MHz 109 000000 MHz 18 000 MHz 100 MHz 90 955 000 MHz 109 045 000 MHz 18 090MHz 900 MHz 225 MHz 1575 MHz 1350MHz Note 1 Step 12 Span Error Freq Span Span Error Spec ADUT ASyn Min Max from able 2 3 200 Hz 1 0 Hz 10 Hz 100 kHz 5000 Hz 5000 Hz 100 1 kHz 5 005 Hz 5 005 Hz 1 MHz 50 000 Hz 50 000 Hz 1 01 MHz 23 230 Hz 23 2...

Страница 94: ...0 ms 90 ms 110 ms 500 ms 450 ms 550 ms 1s 900 ms 1 10 s Step 12 Sweep Time Accuracy Sweep Times 220 s 21 Step 19 Sweep Time Accuracy Sweep Times 220 ms Alternate Procedure S W E E P T I M E Sweet Gen Readout 1 20 ms 50 ms 100 ms 500 ms 1s 10 s 50 s 100 s 150 s Min 18 0 ms 45 0 ms 90 0 ms 450 ms 900 ms 9 00 s 45 0 s 90 0 s 20 0 s Measured 2 72 Performance Tests ...

Страница 95: ...z F R E Q U E N C Y S P A N 5MHz 2 MHz 500kHz 200kHz 50kHz 20kHz 5kHz 2 kHz 500 Hz 200Hz 100Hz 100Hz MARKER A Readout of 3 Min Measured 2 400 MHz 900kHz 270 0 kHz 90 0 kHz 27 00 kHz 9 00 kHz 2 700 kHz 800Hz 240Hz 80Hz 24Hz 8Hz d 3 Bandwidth Max 3 600 MHz 1 100 MHz 330 0 kHz 110 0 kHz 33 00 kHz 11 00 kHz 3 300 kHz 1 200 kHz 360Hz 120Hz 36 Hz 12 Hz Performance Tests 2 73 ...

Страница 96: ...lectivity Selectivity Ratio Bandwidth 60dB BW t 3 dB BW 3 MHz 20 MHz 1MHz 15MHz 300 kHz 5 MHz 100 kHz 2 MHz 3 0 kHz 500 kHz 10 kHz 200 kHz 3 kHz 50 kHz 1 kHz 10 kHz 300 Hz 5 kHz 100 Hz 2 kHz 30 Hz 500 Hz 10 Hz 100 Hz 100 Hz 300 Hz AUTO AUTO AUTO AUTO AUTO AUTO AUTO AUTO AUTO AUTO I I 15 l 15 l 15 1 I I 15 l 13 1 13 l I I 13 l 11 l 11 l 60 dB points separated by cl00 Hz 2 74 Performance Tests ...

Страница 97: ...ncertainty 1 MHz 3 MHz 300 kHz 100 kHz 30 kHz 10 kHz 3 kHz 1 kHz 300 Hz 100 Hz 30 Hz 10 Hz FREQUENCY SPAN 5 MHz 5 MHz 5 MHz 500 kHz 500 kHz 50 kHz 50 kHz 10 kHz 1 kHz 1 kHz 200 Hz 100 Hz Deviation MKR A Readout dB 0 ref Allowable Deviation PI 0 ref AZ1 00 Iko 50 zto 50 Ito dzo 50 kO 50 f0 50 f0 50 f0 50 1tO 80 f2 00 Performance Tests 2 75 ...

Страница 98: ...ttenuator Switching Uncertainty R E F E R E N C E LEVEL ww 5 0 4 0 3 0 2 0 1 0 0 lO Frequency Synthesizer Amplitude Wm 52 42 32 22 12 2 8 Deviation MARKER A Amplitude WV 0 ref Corrected Allowable Deviation Deviation ow 0 W 0 ref ztl dB l dB ztl dB kl dB fl dB kl dB 2 76 Performance Tests ...

Страница 99: ... 2 100 kHz to 20 MHz SIGNAL INPUT 1 1 kHz to 100 kHz SIGNAL INPUT 1 1000 Hz 900 Hz 800 Hz 700 Hz 600 Hz 500 Hz 400 Hz 300 Hz 200 Hz 100 Hz SIGNAL INPUT 1 deviation in dB 100 Hz to 500 MHz steps 16 25 42 or 48 overall max overall min SIGNAL INPUT 2 deviation in dB 100 kHz to 1 5 GHz steps 12 or 31 overall max overall min SIGNAL INPUT 1 deviation in dB 100 Hz to 1 5 GHz steps 15 16 25 42 or 48 overa...

Страница 100: ...Test 9 RF Gain Uncertainty Test Step 6 2nd LO Shift Min Measured Max 1 0 dB 1 0 dB 2 78 Performance Tests ...

Страница 101: ... 0 72 SHIFT ENTER B DIVJJ 8 0 32 9 0 42 100 52 110 62 120 72 Frequency Synthesizer Amplitude dBm 100 100 100 100 100 100 10 10 100 100 10 10 10 Deviation Marker A Amplitude W9 0 ref Step 18 IF Gain Uncertainty 2 dB Steps PREFERENCE LEVEL Frequency Deviation Pm Synthesizer MARKER A Amplitude Amplitude ml dB 1 9 3 9 5 9 7 9 9 9 3 9 5 9 7 9 9 9 11 9 0 ref Performance Tests 2 79 ...

Страница 102: ...WV 0 0 0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 1 0 1 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 Step 22 IF Gain Uncertainty 0 1 dB Steps Frequency Synthesizer Amplitude VW 2 00 0 ref 2 10 2 20 2 30 2 40 2 50 2 60 2 70 2 80 2 90 3 00 3 10 3 20 3 30 3 40 3 50 3 60 3 70 3 80 3 90 2 80 Performance Tests ...

Страница 103: ...Recorded deviations from Steps 18 and 22 C D Step 18 Step 22 Largest Positive Deviation dB Largest Negative Deviation dB dB dB SteuI Steps 25 to 28 IF Gain Uncertainty 1 Min Measured 1 Max 1 25 Sum of positive deviations of A C D 0 6 dB 26 Sum of negative deviations of A C D 0 6 dB 27 Sum of positive deviations of A B C D 1 0 dB 28 Sum of negative deviations of A B C D 1 0 dB Performance Tests 2 8...

Страница 104: ...st 11 Log Scale Switching Uncertainty Tkst Step 6 Log Scale Switching Uncertainty SCALE MKR Amplitude dB DIV PW 1 2 5 10 Deviation Allowable W Deviation W 0 ref 0 ref xto 5 hO 5 f0 5 2 82 Performance Tests ...

Страница 105: ...RKER A Amplitude Column 2 Column 1 Amplitude Amplitude W W Wm Step lO 0 ref 0 ref 0 ref 0 1 0 1 0 2 0 2 0 3 0 3 0 4 0 4 0 5 0 5 0 6 0 6 0 7 0 7 0 8 0 8 0 9 0 Step 14 Linear Amplitude Fidelity Frequency MARKER A Allowable Range Synthesizer Amplitude f3 of Reference Level I Amplitude W 1 WW Min Max 0 10 87 9 21 1 0 23 10 17 72 Performance Tests 2 83 ...

Страница 106: ...Test 13 Average Noise Level Test 2 84 Performance Tests ...

Страница 107: ... 14 Residual Responses Test Step 11 Maximum Residual Response Frequency Range 500 Hz to 1500 MHz Option 400 500 Hz to 2 5 kHz 2 5 kHz to 1500 MHz Measured Measured Max Max Amplitude Frequency 105 dBm 95 dBm 105 dBm Performance Tests 2 85 ...

Страница 108: ...input signals 1 MHz separation Third Order Intermodulation Distortion 30 MHz input signals 10 kHz separation Third Order Intermodulation Distortion 30 MHz input signals 10 kHz separation Second Order Intermodulation Distortion 30 MHz input signals fz fl Second Order Intermodulation Distortion 30 MHz input signals fi f Min Measured Max 90 dBm 105 dBm 100 dBm 100 dBm 90 dBm 90 dBm 105 dBm 105 dBm 2 ...

Страница 109: ...Test 16 Residual FM Test Test 16 Residual FM Test Step 14 Residual FM IMinIMeasuredIrax Performance Tests 2 87 ...

Страница 110: ...Tkst 17 Line Related Sidebands Test Step 7 120 Hz 100 Hz 180 Hz 150 Hz 240 Hz 200 Hz 7 Option 400 400 Hz 800 Hz 1200 Hz Min 1 Measured Max 1 85 dB 85 dB 85 dB 75 dB 75 dB 75 dB 2 88 Performance Tests ...

Страница 111: ...Test 18 Calibrator Amplitude Accuracy Test Test 18 Calibrator Amplitude Accuracy I t Step 2 CAL OUTPUT Amplitude Min M e a s u r e d M a x 10 3 dBm 9 70 dBm Performance Tests 2 89 ...

Страница 112: ... Sweep Time Accuracy Test 20 ms Step 11 F t Sweep Time Accuracy 20 ms SWEEP TIME Function Generator Frequency kW 5 ms 2 00 kO 02 2 ms 5 00 Iko 05 1 ms 10 0 fO 1 200 ps 50 0 f0 5 100 ps 100 fl 2 90 Performance Tests ...

Страница 113: ...Test 20 1st LO Output Amplitude Test Test 20 1st LO Output Amplitude Test Step 4 1st LO Output Level Performance Tests 2 91 ...

Страница 114: ...st 21 Frequency Reference Error Test ISteD DescriDtion 1 Min 1 Measured 1 Max 1 4 Frequency initial 10 MHz 5 Frequency after 24 hours 10 MHz 6 Difference between 4 and 5 Hz 0 01 Hz 2 92 Performance Tests ...

Страница 115: ...Oscillator Adjustments 3 10 11 Down Up Converter Adjustments 3 10 12 Time Base Adjustment SN 2840A and Below 3 10 12 Time Base Adjustment SN 2848A and Above 3 10 13 20 MHz Reference Adjustments 3 10 14 249 MHz Phase Lock Oscillator Adjustments 3 10 15 275 MHz Phase Lock Oscillator Adjustments 3 10 16 Second IF Amplifier and Third Converter Adjustments 3 10 17 Pilot Second IF Amplifier Adjustments ...

Страница 116: ... wait for the MAINS indicators red LEDs to go completely out Capacitors inside the instrument may still be charged even if the instrument has been disconnected from its source of power Use a non metallic tuning tool whenever possible Equipment Required The equipment required for the adjustment procedures is listed in lkble l l Recommended Test Equipment at the beginning of this manual If the test ...

Страница 117: ... Lock Oscillator Adjustments 22 Comb Generator Adjustments RF Signal Conversion and RF Gains 16 Second IF Amplifier Adjustments 17 Pilot Second IF Amplifier Adjustments 19 Second Converter Adjustments Sweep Times 18 Frequency Control Adjustments Frequency Tuning 18 Frequency Control Adjustments 20 50 MHz Voltage Tuned Oscillator Adjustments Frequency Span 18 Frequency Control Adjustments START and...

Страница 118: ...indicated to ensure that the instrument meets specifications Location of lkst Points and Adjustments Illustrations showing the locations of assemblies containing adjustments and the location of those adjustments within the assemblies are contained within the adjustment procedures to which they apply Major assembly and component location illustrations are located at the rear of this manual 3 4 Adju...

Страница 119: ... Magnitude of top bottom focus correction Centering of top bottom focus correction Magnitude of right left focus correction Centering of right left focus correction Sets orthogonality of CRT Adjusts spot size Sets adjustment range of front panel INTENSITY control Adjusts astigmatism of CRT Coarse adjusts CRT focus Adjusts rise and fall times of X deflection amplifier pulse Adjusts rise and fall ti...

Страница 120: ...Adjusts vertical long lines on graticule information Adjusts bottom line of graticule to align with fast sweep signal A3A8R5 GAIN 23 Adjusts high end of digitized sweep A3A8R6 OFFS 23 Adjusts low end of digitized sweep A3A9R36 OFS NEG 24 Adjusts offset of negative peak detect mode A3A9R39 GPOS 24 Adjusts gain for positive peak detect mode A3A9R44 OFS POS 24 Adjusts offset of positive peak detect m...

Страница 121: ...or to set adjustment range of front panel FREQ ZERO control A4A5R2 A4A5R32 A4A5R33 A4A5R44 A4A5R5 1 A4A5R54 1OV ADJ SGlO CAL SG20 1 VR SG20 2 Adjusts 1OV temperature compensation supply Adjusts 10 dB step gain Adjusts IF gain Adjusts first 20 dB step gain Adjusts variable step gain Adjusts second 20 dB step gain A4A6AlC31 A4A6A lR29 18 4 MHz NULL WIDE GAIN Nulls 18 4 MHz local oscillator signal Ad...

Страница 122: ...A8R6 A20 dB 8 Adjusts attenuation of 21 4 MHz bandwidth filter 20 dB step A4A8R7 A10 dB 8 Adjusts attenuation of 21 4 MHz bandwidth filter 10 dB step A4A8R35 LC 8 Adjusts LC filter amplitudes A4A8R40 XTAL 8 Adjusts crystal filter amplitudes A4A9R60 3 MHz 9 Adjusts 3 MHz bandwidth A4A9R61 1 MHz 9 Adjusts 1 MHz bandwidth A4A9R62 300 kHz 9 Adjusts 300 kHz bandwidth A4A9R65 10 kHz 9 Adjusts 10 kHz ban...

Страница 123: ... IF gain 2 to 5 8 GHz Adjusts IF gain 5 8 to 12 5 GHz Adjusts IF gain 12 5 to 18 6 GHz Adjusts IF gain 18 6 to 22 GHz Adjusts linearity 5 8 to 12 5 GHz high end Adjusts linearity 12 5 to 18 6 GHz low end Adjusts linearity 12 5 to 18 6 GHz high end Adjusts linearity 5 8 to 12 5 GHz Adjusts linearity 12 5 to 18 6 GHz low end Adjusts linearity 12 5 to 18 6 GHz high end Adjusts linearity 18 6 to 22 GH...

Страница 124: ...tput 165 MHz NULL 160 MHz NULL 170 MHz NULL 17 Nulls signal at 165 MHz 17 Nulls signal at 160 MHz 17 Nulls signal at 170 MHz 160 MHz PEAK VCO ADJ 160 MHz PEAK 160 MHz PEAK 17 Peaks 160 MHz output signal 17 Adjusts PLL3 VCO frequency 17 Peaks 160 MHz output signal 17 Peaks 160 MHz output signal 150 MHz ADJ 100 MHz ADJ 17 Adjusts VCO TUNE voltage at 150 MHz 17 Adjusts VCO TUNE voltage at 100 MHz 2 M...

Страница 125: ...ffset A19R32 2 5 GHz SPAN 13 Adjusts 5 8 GHz switchpoint overlap A19R41 25 GHz SPAN 13 Adjusts 25 GHz span offset OFFSET A19R43 25 GHz SPAN 13 Adjusts 5 8 and 12 5 GHz switchpoint overlaps A19R50 lOVR 13 Adjusts HOV reference for YTO DAC low end 2 GHz A19R56 2 5 GHz SPAN 13 Adjusts 2 5 GHz span offset OFFSET A20R25 A20R34 A22A2 6 15 GHz 13 Sets high end frequency of YTO 2 3 GHz 13 Sets low end fre...

Страница 126: ...ntal position of trace AlA4R27 X GAIN 394 Adjusts horizontal gain of trace AlA4R28 HFGAIN 3 Adjusts rise and fall times or X deflection amplifier pulse AlA5ClO Cl0 3 AlA5Cll Cl1 3 AlA5R7 Y POSN 394 AlA5R27 Y GAIN 394 AlA5R28 HF GAIN 3 4 Adjusts rise and fall times of Y deflection amplifier pulse Adjusts rise and fall times of Y deflection amplifier pulse Adjusts vertical position of trace Adjusts ...

Страница 127: ...to 1 96 K 2 15 K to 13 3 K 51 1 to 133 46 4 K to 215 K Function of Component Sets intensity level Sets intensity level Sets intensity level Sets intensity level Compensates for feedthrough of INTG signal to Ul Compensates for feedthrough of INTG signal to Ull Compensates for DAC ladder resistance Compensates for DAC ladder resistance Sets adjustment range of A4AlR36 FS Compensates for ON resistanc...

Страница 128: ...ets adjustment range of SYM Sets adjustment range of SYM Sets adjustment range of LC CTR Sets adjustment range of LC CTR Sets adjustment range of center cap Sets adjustment range of center cap Sets adjustment range of center cap Matches amplitude of LC to XTAL bandwidths Adjusts LC filter bandwidth Adjusts crystal filter bandwidth Matches amplitude of LC to XTAL bandwidths Adjusts crystal filter b...

Страница 129: ...r bandwidth Adjusts crystal filter bandwidth Adjusts crystal filter bandwidth Adjusts crystal filter bandwidth Adjusts crystal filter bandwidth Adjusts crystal filter bandwidth Adjusts crystal filter bandwidth Adjusts crystal filter bandwidth Adjusts crystal filter bandwidth Compensates for gain of A4A6Al Adjusts crystal filter bandwidth Adjusts crystal filter bandwidth Adjusts crystal filter band...

Страница 130: ...K 75 K to 178 K 10 0 K to 17 5 K 100 to 5 11 K Function of Component Sets adjustment range of LC amplitude Adjusts bandwidth shape in 10 kHz bandwidth Adjusts crystal filter bandwidth Adjusts LC mode feedback Adjusts LC filter bandwidth 85662 60131 only 85662 60190 only Adjusts crystal filter bandwidth Adjusts LC filter bandwidth Sets TC of 3 kHz RBW Sets TC of 10 kHz RBW Sets TC of 300 kHz RBW Se...

Страница 131: ...range of A6AlOR29 GE 10 to 40 K Sets adjustment range of A6AlOR81 GF 100 K to 196 K Adjusts band A breakpoint for best flatness 0 1 to 0 68 fiF Sets YTX delay compensation 0 1 to 0 68 PF Sets YTX delay compensation OPEN Not loaded for HP 85660B 0 1 to 0 68 PF Sets YTX delay compensation 0 1 to 0 68 PF Sets YTX delay compensation 13 356 K 15 K Sets adjustment range of A6A12R63 5 8 GHz Open to 15 pF...

Страница 132: ...50 A4A9R52 A4A9R55 A4A9R57 A4A9R59 A4A9R70 A4A9R72 A4A9R74 8 25 to 12 1 K Centers 3 kHz BW adjustment range 82 5 to 121 K Centers 10 kHz BW adjustment range llOto162K Centers 300 kHz BW adjustment range 14 7 to 21 5 K Centers 1 MHz BW adjustment range 162 to 237 K Centers 3 MHz BW adjustment range 82 5 to 147 K Sets 1 0 dB step size 261 to 464 K Sets 0 2 dB step size 56 2 to 100 K Sets 1 2 dB step...

Страница 133: ... 681 A4A7R76 99 to 133 A4A7R84 99 to 133 A4A7R86 316 to 619 A4A7R92 99 to 133 A4A7R94 316 to 619 A4A7RlOO 99 to 133 A4A7R102 316 to 619 A4A8R30 6 19Kto 16K A4A8R55 6 8 K to 17 6 K A4A8C43 1 0 to 8 2 A4A9R3 4 22 K to 6 19 K A4A9R6 21 5 K to 34 8 K A4A9R7 51 1 K to 75 0 K A4A9RlO 11 0 K to 16 2 K A4A9Rll 2 87 K to 4 22 K A4A9R83 7 50 K to 14 7 K A4A9R85 162 K to 348 K A4A9R86 28 7 K to 61 9 K A4A9R8...

Страница 134: ...57 3 11 0 0160 2258 4 12 0 0160 2259 5 13 0 0160 2260 8 15 0 0160 2261 9 16 0 0160 2262 0 18 0 0160 2263 1 20 0 0160 2264 2 22 0 0160 2265 3 24 0 0160 2266 4 Value pF ZP Fart Number 27 0160 2306 3 30 0160 2199 2 33 0160 2150 5 36 0160 2308 5 39 0140 0190 7 43 0160 2200 6 47 0160 2307 4 51 0160 2201 7 56 0140 0191 8 62 0140 0205 5 68 0140 0192 9 75 0160 2202 8 82 0140 0193 0 91 0160 2203 9 100 0160...

Страница 135: ...698 3132 287 0698 3443 316 0698 3444 348 0698 3445 383 0698 3446 s T 0 1 0 1 6 9 2 5 6 7 8 2 9 0 6 0 0 1 7 3 4 5 9 0 1 2 2 3 4 4 7 8 9 4 0 1 2 3 Value fl EP Fart Number 422 0698 3447 464 0698 0082 511 0757 0416 562 0757 0417 619 0757 0418 681 0757 0419 750 0757 0420 825 0757 0421 909 0757 0422 l OK 0757 0280 l lK 0757 0424 1 21K 0757 0274 1 33K 0757 0317 1 47K 0757 1094 1 62K 0757 0428 1 78K 0757 ...

Страница 136: ...3K 0698 3161 9 42 2K 0698 3450 9 46 4K 0698 3162 0 51 1K 0757 0458 7 56 2K 0757 0459 8 61 9K 0757 0460 1 68 1K 0757 046 1 2 75 OK 0757 0462 3 82 5K 0757 0463 4 90 9K 0757 0464 5 e fl O Value I ElP Fart Number 1OOK 0757 0465 6 1lOK 0757 0466 7 121K 0757 0467 8 133K 0698 345 1 0 147K 0698 3452 1 162K 0757 0470 3 178K 0698 3243 8 196K 0698 3453 2 215K 0698 3454 3 237K 0698 3266 5 261K 0698 3455 4 287...

Страница 137: ...6 5 38 3 0698 3396 2 1 47K 0757 1078 9 42 2 0698 3397 3 1 62K 0757 0873 0 46 4 0698 3398 4 1 78K 0698 0089 4 51 1 0757 1000 7 1 96K 0698 3407 6 56 2 0757 1001 8 2 15K 0698 3408 7 61 9 0757 1002 9 2 37K 0698 3409 8 68 1 0757 0794 4 2 61K 0698 0024 7 75 0 0757 0795 5 2 87K 0698 3101 7 82 5 0757 0796 6 3 16K 0698 3410 1 90 0 0757 0797 7 3 48K 0698 3411 2 100 0757 0198 2 3 83K 0698 3412 3 110 0757 079...

Страница 138: ...8 3416 7 215K 0757 0127 7 0698 3417 8 237K 0698 3424 7 0698 3418 9 261K 0757 0064 1 0698 3103 9 287K 0757 0154 0 0698 3419 0 316K 0698 3425 8 0698 3420 3 348K 0757 0195 9 0698 342 1 4 38313 0757 0133 5 0698 3422 5 422K 0757 0134 6 0698 3423 6 464K 0698 3426 9 0757 0853 6 511K 0757 0135 7 0757 0854 7 562K 0757 0868 3 0757 0309 7 619K 0757 0136 8 0757 0855 8 681K 0757 0869 4 0757 0856 9 750K 0757 01...

Страница 139: ...DAPTER Figure 3 l Low Voltage Power Supply Adjustments Setup Equipment Digital Voltmeter DVM HP 3456A Procedure IF Display Section 1 Position the instrument on its right side with the IF Display Section facing right as shown in Figure 3 1 Remove the top cover of the IF Display Section and the bottom cover of the RF Section 2 Set the LINE switch to ON and press Ip Mains indicator AlABDSl red LED in...

Страница 140: ...3 2 IF Display Section Low Voltage Adjustments SN 3001A and Below t Figure 3 3 A l A7DS2 AlA7TP3 A lA6DS2 AiA6TP4 IF Display Section Low Voltage Adjustments SN 3004A and Above 5 Verify that the 15 V indicator AlA6DS2 yellow LED is lit 6 Connect the DVM to AlA6TP4 DVM indication should be 15 000 f0 050 V dc The 15 V supply is referenced to the 15 V supply therefore if the 15 V supply is out of tole...

Страница 141: ...o the 15 V supply therefore if the 5 2 V supply is out of tolerance a circuit malfunction is indicated RF Section 11 The 2OV indicator A24DS2 yellow LED should be lit See Figure 3 4 A24 V O L T A G E A24R60 REGULATOR 2OV A D J I AZ4R60 2OV A D J A24 Figure 3 4 Location of RF Section Low Voltage Adjustments 12 Connect the DVM to A24TP3 with the ground lead to A24TPl Adjust A24R60 2OV ADJ for a DVM ...

Страница 142: ...hould be 5 200 ho 050 V de The 5V supply is referenced to the 2OV supply therefore if the 5V supply is out of tolerance a circuit malfunction is indicated 19 The 15V indicator A24DS3 yellow LED should be lit 20 Connect the DVM to A24TP4 The DVM indication should be 15 000 f0 050 V dc The 15V supply is referenced to the 20V supply therefore if the 15V supply is out of tolerance a circuit malfunctio...

Страница 143: ... remove the AlA High Voltage Assembly from the instrument Do not disconnect the CRT s post accelerator cable the CRT can hold a 18 kV dc charge for several days If for any reason the AlA High Voltage Assembly or the post accelerator cable must be removed refer to Discharge Procedure for High Voltage and CRT at the end of this adjustment procedure A 1OOO l divider probe is used to measure the CRT c...

Страница 144: ... contacted could cause serious personal injury Use a nonmetallic alignment tool when making adjustments Be extremely careful Warning Do not attempt to measure the CRT filament voltage directly The filament voltage is referenced to the high voltage cathode and can only be measured safely with a special high voltage true rms voltmeter and probe 1 Set the spectrum analyzer s LINE switch to STANDBY 2 ...

Страница 145: ...ut off to prevent possible damage to the CRT 5 Note the DVM indication at AlA7TP3 DVM Indication 6 Connect the high voltage probe to the DVM Connect the probe to AlA7TP3 7 Note the DVM indication DVM Indication 8 Divide the DVM indication in step 7 by the DVM indication in step 5 This gives the calibration factor needed to compensate for high voltage probe error Calibration Factor 9 Disconnect the...

Страница 146: ...e the nominal value of 3790 V dc 12 Connect the high voltage probe to AlA3TP3 See Figure 3 7 for the location of the test point Warning With power supplied to the instrument AlA3TP3 is at a voltage level of approximately 4000 V dc Be extremely careful AlA H gh V o l t a g e R e g u lotor Figure 3 7 Location of Label and Test Point 13 Reconnect ac line cords to both instrument sections Set the LINE...

Страница 147: ...NE switch to STANDBY Remove the ac line cord from Adjustments each instrument section 20 Wait at least one minute for the MAINS power on indicator AlA8DSl red LED to go out completely before proceeding 21 Disconnect the high voltage probe from AlA3TP3 22 Remove the A3A2 Intensity Control Assembly from the IF Display Section and install in its place the Display Adjustment Board HP part number 85662...

Страница 148: ...ure 3 8 for the location of the adjustment Note The AlA2R35 INT LIMIT adjustment compensates for the variation in beam cut off voltage of different CRTs and indirectly sets the maximum beam intensity AlA2R35 INT LIMIT should have enough range to turn the CRT spot on and off If the spot is always on decrease the value of AlA2R9 If the spot is always off increase the value of AlA2R9 Refer to Table 3...

Страница 149: ... generator to each of the X and Y inputs of the Display Adjustment Board as shown in Figure 3 5 Set the function generators as follows X input Jl frequency 500 kHz w a v e amplitude Y input 52 frequency 1 kHz w a v e amplitude 36 Adjust AlA2R35 INT LIMIT clockwise until the display is just visible 37 Adjust AlA4R7 POS AlA5R7 POS and if necessary the function generator de offsets for a full screen ...

Страница 150: ...SITY control fully counter clockwise b Set the LINE switch to STANDBY c Increase the value of AlA2R9 d Return to step 34 Note Maximum CRT life expectancy is obtained when the peak to peak voltage at AlA3TP5 is as large as possible with the INTENSITY control set fully clockwise The display illumination must fully disappear with the INTENSITY control set fully counter clockwise 5 0 0 uS dlv 1 f 85 0...

Страница 151: ...e procedure has been performed 1 Set the spectrum analyzer s LINE switch to STANDBY remove the ac line cords and remove the AlA High Voltage Regulator safety cover Warning With the ac power cord disconnected voltages are still present which if contacted could cause serious personal injury Warning In the following step a large arc of high voltage should be drawn Be careful 2 Locate the snap connect...

Страница 152: ...m chassis ground to the black wire coming from the AlAll High Voltage Multiplier at the wire s connection to AlA3Tl AlA H i g h V o l t a g e T 1 AlA3Tl AIA3 Figure 3 l 1 Discharging the CRT Post Accelerator Cable 7 Remove all jumper wires The AlA High Voltage Regulator AlAll High Voltage Multiplier and AlVl CRT assemblies should now be discharged 8 A small bracket and screw secure the AlA High Vo...

Страница 153: ...A High Voltage Regulator Assembly from the instrument Do not disconnect the CRT s post accelerator cable the CRT can hold a 9500 V dc charge for several days If for any reason the AlA High Voltage Assembly or the post accelerator cable must be removed refer to Discharge Procedure for High Voltage and CRT at the end of this adjustment procedure A 1OOO l divider probe is used to measure the CRT cath...

Страница 154: ...l high voltage true rms voltmeter and probe 1 Set the spectrum analyzer s LINE switch to STANDBY 2 Remove the top cover from the IF Display Section and connect the equipment as shown in Figure 3 12 SPECTRUM ANALYZER Figure 3 12 High Voltage Adjustment Setup 3 Set the DVM to the 1OOV range and connect the DVM to AlA7TP3 120V without the high voltage probe See Figure 3 13 Note The accuracy of the hi...

Страница 155: ...pensate for high voltage probe error Calibration Factor 9 Disconnect the high voltage probe from AlA7TP3 Set the LINE switch to STANDBY Remove the ac line cord from both instrument sections Warning The MAINS power on indicator AlASDSl red LED should be completely off before proceeding with this procedure See Figure 3 13 The indicator will remain lit for several seconds after the ac line cord has b...

Страница 156: ...ful 12 Connect the high voltage probe to AlA3TP2A See Figure 3 14 for the location of the test point AlA3Al L A B E L AlA3TPZP AlA3TP2A Figure 3 14 Location of AlA Label and Test Point 13 Reconnect ac line cords to both instrument sections Set the LINE switch to ON 14 Wait approximately 30 seconds for the de regulator circuits to stabilize 15 Adjust AlA6R103 HV ADJ for a DVM indication equal to th...

Страница 157: ...t SN 3004A and Above and then adjustment procedure 4 Final Display Adjustments SN 3004A and Above If the AlA assembly functions properly and does not require compensation proceed directly to adjustment procedure 4 Final Display Adjustments SN 3004A and Above Discharge Procedure The High Voltage Adjustment procedure does not require the removal for High Voltage and or discharge of the Al A3 High Vo...

Страница 158: ... accelerator cable and the CRT You should hear a cracking sound when the cable discharges 5 Remove the cover from the AlA High Voltage Regulator assembly 6 Touch the screwdriver s tip to the top lead of each of the 11 large vertical capacitors on the AlA High Voltage Regulator assembly 7 The AlA High Voltage Regulator and AlVl CRT assemblies should now be discharged G r o u n d i n g W i r e Figur...

Страница 159: ...ssary only when a major repair has been performed in the display section for example replacement or repair of the AlA Z Axis Amplifier AlA X Deflection Amplifier or AlA Y Deflection Amplifier assemblies For routine maintenance CRT replacement or minor repairs only adjustment procedure 4 Final Display Adjustments needs to be performed Caution Be sure not to allow a high intensity spot to remain on ...

Страница 160: ...onnect the channel 4 probe to the oscilloscope s rear panel PROBE COMPENSATION AC CALIBRATOR OUTPUT connector Press LAUTO SCALE_ Adjust the channel 4 probe for an optimum square wave display on the oscilloscope Note Each probe is now compensated for the oscilloscope input to which it is connected Do not interchange probes without recompensating 8 Connect the channel 1 1O l divider probe to AlA4E1 ...

Страница 161: ...llows MODE NORM Waveform pulse Frequency FRQ 200 kHz Width WID 250 ns Amplitude AMP 2 00 V Offset OFS 000 mV Il Connect the output of the Pulse Function Generator to Jl X input on the Display Adjustment PC board in the A3A2 slot as shown in Figure 3 16 Note The Pulse Function Generator s output must be terminated with 50 ohms Use a BNC tee a 500 termination and a BNC female to SMB female adapter I...

Страница 162: ......

Страница 163: ...Adjust AlA4R28 HF GAIN AlA4Cl0 and AlA4Cll for minimum overshoot and minimum rise and fall times of the composite X deflection waveform Note Always adjust AlA4ClO and AlA4Cll in approximately equal amounts Do not adjust one to its minimum value and the other to its maximum value 18 Use the oscilloscope Intnv markers to measure the risetime falltime and percent overshoot of the composite X defectio...

Страница 164: ...re preset probe and use the front panel knob to set the probe to 10 00 1 Press more 24 Set the oscilloscope controls as follows Press CHAN amplitude scale 10 0V div offset 25 0000 V Press TlMEBASEI time scale 50 0ns div delay 125 000 ns Press ITRIG level 5 00000 V c Press 1 connect dots on Press ii 25 Connect the output of the Pulse Function Generator to 53 Z input on the Display Adjustment PC Boa...

Страница 165: ...5OV Signal 31 Adjust AlA2R22 HF GAIN and AIABCIO for minimum overshoot on rise and minimum rise and fall times of the pulse waveform 32 Use the oscilloscope ml markers to measure the risetime falltime and percent overshoot of the pulse waveform Rise and falltimes should be less than 50 ns and 90 ns respectively Overshoot on the rise should be less than 5 approximately 0 4 divisions 33 Set the spec...

Страница 166: ...tics These preliminary adjustments are necessary only after replacement or repair of the AlA X Y Z Axis Amplifier Assembly For routine maintenance CRT replacement or minor repairs only Adjustment Procedure 4 Final Display Adjustments needs to be performed Caution Be sure not to allow a fixed spot of high intensity to remain on the spectrum analyzer CRT A high intensity spot may permanently damage ...

Страница 167: ...oscope 7 Connect the channel 4 probe to the oscilloscope s rear panel PROBE COMPENSATION AC CALIBRATOR OUTPUT connector Press AUTO SCALE Adjust the channel 4 probe for an optimum square wave display on the oscilloscope Note Each probe is now compensated for the oscilloscope input to which it is connected Do not interchange probes without recompensating 8 Connect the channel 1 IO 1 divider probe to...

Страница 168: ...pulse Frequency FRQ 200 kHz Width WID 250 ns Amplitude AMP 2 00 V Offset OFS O OOO mV 11 Connect the output of the Pulse Function Generator to Jl X input on the Display Adjustment PC board in the A3A2 slot as shown in Figure 3 23 Note The pulse function generator s output must be terminated with 50 ohms Use a BNC tee a 5Ofl termination and a BNC female to SMB female adapter Install the 5052 termin...

Страница 169: ...tion and X deflection waveforms should be superimposed on the oscilloscope display as shown in Figure 3 26 If necessary adjust AlA2R227 X POSN and AlA2R220 X GAIN for a centered display of at least four vertical divisions See Figure 3 25 for the location of the adjustments hf running 8 1 2 5 0 0 0 ns 1 1 0 0 V div offset 2 5 0 0 V 10 00 I dc 4 1 0 0 V div offset 6 0 0 0 v 10 00 I dc 1 f 25 00 V Fi...

Страница 170: ...mum overshoot and minimum rise and fall times of the composite X deflection waveform Note Always adjust AlA2C204 and AlA2C209 in approximately equal amounts Do not adjust one to its minimum value and the other to its maximum value 18 Use the oscilloscope Intnv markers to measure the risetime falltime and percent overshoot of the composite X defection waveform Rise and fall times should both be les...

Страница 171: ...anel knob to set the probe to lO OO l Press more Press CHAN amplitude scale 20 0 V div offset 45 0000 V Press C 1 time scale 50 0ns div delay 125 000 ns Press TRIG level __ 50 00000 v Press DISPLAY connect dots on Press SHOW Connect the output of the Pulse Function Generator to 53 Z input on the Display Adjustment PC Board in the A3A2 slot Set the board s switch to the down position The pulse func...

Страница 172: ...v markers to measure the risetime falltime and percent overshoot of the pulse waveform Rise and falltimes should be less than 50 ns and 90 ns respectively Overshoot on the rise should be less than 5 approximately 0 4 divisions 33 Set the spectrum analyzer s LINE switch to STANDBY and reconnect the cable to AlA2J5 34 Disconnect the oscilloscope channel 1 probe from the spectrum analyzer Remove the ...

Страница 173: ...cision variable capacitors on the AlA Z Axis Amplifier AlA X Axis Amplifier or AlA Y Axis Amplifier Assemblies AlA2R36 INT LIMIT AlA2R22 HF GAIN AlABClO AlA4R28 HF GAIN AlA4C10 AlA4Cl1 AlA5R28 HF GAIN AlA5C10 or AlA5Cll These components are adjusted in Adjustment Procedure 2 High Voltage Adjustments SN 3001A and Below and Adjustment Procedure 3 Preliminary Display Adjustments SN 3001A and Below Ih...

Страница 174: ... best focus of annotation short vectors 6 Adjust AlA2R31 ORTHO the front panel ALIGN control and AlA2R32 PATT to optimize the orientation and appearance of the rectangular graticule pattern on the CRT display 7 Repeat steps 4 through 6 as needed to optimize overall display focus and appearance FEN R27 G A I N R31 R32 R36 R30 O R T H O P A T T A S T I G F O C U S G A I N AIAZ Figure 3 30 Location o...

Страница 175: ...justment SN 3004A and Above should be performed prior to performing the following adjustment procedure 1 Connect the equipment as shown in Figure 3 31 SPECTRUl ANALYZER Figure 3 31 Final Display Adjustments Setup 2 Set the photometer probe to NORMAL Press POWER_ on the photometer to turn it on and allow 30 minutes warm up Zero the photometer according to the manufacturer s instructions 3 With the ...

Страница 176: ...tion centered centered centered centered two thirds clockwise centered centered centered centered centered centered centered fully counterclockwise centered fully counterclockwise centered centered 4 Set the spectrum analyzer s LINE switch to ON and wait at least 5 minutes to allow the CRT and high voltage circuits to warm up 5 Set the front panel INTENSITY control fully counterclockwise and adjus...

Страница 177: ... It might be necessary to slightly trim the top and bottom of the photometer probe s hood so that it will fit flush against the glass RF1 filter Note If a standard J 16 photometer is used instead of metric option OZ adjust AlA2R319 for a photometer reading of 23 5 fl footlamberts 12 Set the LINE switch to STANDBY and then back to ON The spectrum analyzer power up annotation should be visible on th...

Страница 178: ...st AlA2R512 ORTHO and the front panel ALIGN control to optimize the orientation and appearance of the rectangular graticule pattern on the CRT display 18 Repeat steps 13 through 17 as needed to optimize overall display focus and appearance 3 64 Adjustments ...

Страница 179: ...r maximum DVM indication The bandpass filter amplitude is adjusted by monitoring the output of the filter control line shorted and not shorted to the 15V supply Next log fidelity gain and offset of the log curve is adjusted by adjusting the 12 VTV and the PIN diode attenuator Last the linear gain step adjustments are performed to set the proper amount of step gain in the linear mode of operation E...

Страница 180: ...R I A4A2 R83 c55 R67 LG 10 C52 C53 CTR R66 AMPTD A4A3 Figure 3 34 Location of Log Amplifier Adjustments Bandpass Filter Center Adjustment 6 Press LOG ENTER dB DIv 7 Set the frequency synthesizer for 7 6000 MHz at 5 0 dBm output level 8 Adjust A4A3C55 CTR for maximum DVM indication See Figure 3 34 for location of adjustment If A4A3C55 is at an extreme of its adjustment range fully meshed maximum ca...

Страница 181: ...O 0002 V dc Synthesizer level 15 Press LOG ENTER dB DIV dBm 16 Wait three minutes for the log assemblies to stabilize 17 Decrease the frequency synthesizer output level by 50 dB 18 Adjust A4A2R91 12 VTV for DVM indication of 500 f 1 mV dc See Figure 3 34 for location of adjustment 19 Increase the frequency synthesizer output level by 50 dB to the level of step 14 20 Adjust A4A2R61 ATTEN for DVM in...

Страница 182: ...on of 1 000 kO 010 V dc See Figure 3 34 location of adjustment If unable to adjust LGlO for proper indication increase or decrease value of A4A3R54 Refer to Table 3 3 for range of values 26 Decrease the frequency synthesizer output level by 10 dB 27 Key in REFERENCE LEVEL_ 70 dB 28 Adjust A4A2R14 LG20 for DVM indication of 1 000 fO O1O V dc See Figure 3 34 for location of adjustment If unable to a...

Страница 183: ...nce level The offsets and gains on the A4Al Video Processor are adjusted for proper levels using a DVM Equipment Note Procedure cd 0 1OdB STEP ATTENUATOR D I G I T A L V O L T M T E R Figure 3 35 Video Processor Adjustments Setup Digital Voltmeter DVM HP 3456A 10 dB Step Attenuator HP 355D The voltage at A4AlTP3 may drift noticeably with temperature during this adjustment Allow A4Al Video Processo...

Страница 184: ... R32 LGR20S OS F S ZERO I A4A 1 Figure 3 36 Location of Video Processor Adjustments Connect the DVM to A4AlTP3 Set the step attenuator to 120 dB Adjust A4AlR32 ZERO for a DVM indication of 0 000 rtO 001 Vdc Set the step attenuator to 0 dB Adjust A4AlR36 FS for DVM indication of 2 000 f 0 001 V dc Repeat steps 12 through 15 until specifications of steps 13 and 15 are met LOG Offset Adjust 17 Set st...

Страница 185: ...reater than the indication recorded in step 19 If not readjust A4AlR2 LG OS 24 Decrease reference level to 90 dBm using the step key 25 DVM indication should be 0 400 f0 004 V dc greater than the indication recorded in step 19 If not readjust A4AlR2 LG OS 26 Repeat steps 17 through 25 until the specifications are met Adjustments 3 7 1 ...

Страница 186: ...gnment of the filter stages See Figure 3 91 for information concerning the bypass networks A stable 21 4 MHz signal is then applied to the IF section of the instrument from a frequency synthesizer Each of the first four stages of the 3 MHz Bandwidth Filter is peaked in a 10 Hz bandwidth using an oscilloscope display The final stage is peaked using the spectrum analyzer CRT display After all five f...

Страница 187: ...l knob to place signal peak near top CRT graticule line 7 On the A4A7 assembly connect crystal filter bypass networks between the pins above C41 SYM C32 SYM C23 SYM and Cl4 SYM 8 Adjust A4A7C7 CTR for minimum amplitude signal peak Adjust A4A7C6 SYM for best symmetry of signal Repeat adjustments to ensure that the signal is nulled and adjusted for best symmetry See Figure 3 38 for location of adjus...

Страница 188: ...r minimum amplitude of signal peak Adjust A4A7C41 SYM for best symmetry of signal Repeat adjustments to ensure that the signal is nulled and adjusted for best symmetry See Figure 3 38 for location of adjustments 17 Signal should be centered on center graticule line on CRT display If signal is not centered go back to step 3 and repeat adjustments of each filter stage Filter Peak Adjust 18 Press JNS...

Страница 189: ...nnel 2 probe to A4A7TPl left side of C41 SYM 30 Adjust frequency synthesizer output frequency to peak Channel 1 display 31 Adjust A4A7C31 PK for maximum peak to peak signal on Channel 2 display See Figure 3 39 for location of adjustment If unable to achieve a peak in signal amplitude increase or decrease value of A4A7C30 Refer to Iable 3 3 for range of values 32 Disconnect Channel 2 probe from A4A...

Страница 190: ... DISPLAY LINE ENTER U s i n g t h e DATA knob place the display line at the signal trace Key in REs 10 Hz Adjust the instrument front panel FREQ ZERO control for maximum signal amplitude on the CRT display Adjust A4A7R30 10 Hz AMPTD and A4A7R41 10 Hz AMPTD equal amounts to set the signal level the same as the reference level set in step 39 See Figure 3 38 for location of 10 Hz AMPTD adjusts Repeat...

Страница 191: ...tive pole Next the LC filters and the crystal filter poles on the A4A8 Attenuator Bandwidth Filter are adjusted in the same manner as on the A4A4 Bandwidth Filter Last the 10 dB and 20 dB attenuators on the A4A8 Attenuator Bandwidth Filter are adjusted for the proper amount of attenuation This is done by connecting the CAL OUTPUT signal to the RF INPUT through two step attenuators keying in the ne...

Страница 192: ...n and 18 4 MHz Local Oscillator Adjustments for adjustment procedure A4A4 LC Adjustments 5 Set step attenuators to 0 dB 6 Disconnect cable 97 white violet from A4A8Jl and connect to A4A6J 1 7 Key in CCENTER FREQ 20 MHz jREs 100 kHz FREQUENCY SPAN 200 kHz and press LIN pushbutton 8 Press REFERENCE LEVEL and adjust front panel knob to set signal peak on screen two divisions from the top graticule 9 ...

Страница 193: ...4A4TP4 and A4A4TP5 18 Adjust A4A4C20 CTR to center signal on center graticule line Adjust A4A4C9 SYM for best symmetry of signal See Figure 3 42 for location of adjustments If unable to adjust SYM for satisfactory signal symmetry increase or decrease value of A4A4ClO Refer to Table 3 3 for range of values A4A4 B a n d w i d t h F i l t e r A4A4 Figure 3 42 Location of A4A4 21 4 MHz Crystal Filter ...

Страница 194: ...X See Figure 3 42 for location of adjustment A4A8 LC Adjustments 27 Disconnect cable 97 white violet from A4A6Jl and reconnect to A4A8Jl Reconnect cable 89 gray white to A4A6Jl 28 Key in BW 100 kHz and FREQUENCY SPAN 200 kHz 29 Press REFERENCE LEVEL and adjust DATA knob to place signal peak two division from the top graticule line 30 Adjust A4AW32 LC CTR and A4A8C46 LC CTR for maximum MARKER level...

Страница 195: ... for best symmetry of signal See Figure 3 44 for location of adjustments If unable to adjust A4A8C42 SYM for satisfactory signal symmetry increase or decrease value of A4A8C43 Refer to Table 3 3 for range of values A4A8 A t t e n u a t o r B a n d w i d t h F i l t e r A4A8 Figure 3 44 Location of A4A8 21 4 MHz Crystal Filter Adjustments 40 Remove crystal filter bypass network from between A4A8TPl...

Страница 196: ...o offset the signal peak approximately 17 kHz to the left This is done to compensate for the effect of placing the board on extenders If unable to achieve a dip in signal amplitude increase or decrease value of A4A4R16 Refer to Table 3 3 for range of values Remove short from A4A4TP3 and short A4A4TP8 to ground Adjust A4A4C43 LC DIP for minimum amplitude of signal peak See Figure 3 41 for location ...

Страница 197: ...Bandwidth Filter without extenders Remove short from A4ABTP3 Set LINE switch to ON Press NSTR PRESET Go back and repeat LC adjustments for both the A4A4 Bandwidth filter and the A4A8 Attenuator Bandwidth Filter AlOdB and A20dB Adjustments 68 69 70 71 72 73 74 Set step attenuators to 25 dB Key in CENTER FREQUENCY 20 MHz FREQUENCY SPAN_ 3 kHz CATTEN 0 dB REsBWI 1 kHz and REFERENCE LEVEL 30 dBm Key i...

Страница 198: ...t is required for this adjustment 1 Position instrument upright and remove top cover 2 Set LINE switch to ON and press INSTR PRESET 3 Connect CAL OUTPUT to RF INPUT 4 Key in CENTER FREQUENCY_ 20 MHz FREQUENCY SPAN 5 MHz LIN and REs 3 MHz 5 Press PREFERENCE LEVEL and adjust DATA knob to place signal peak near top CRT graticule line Signal should be centered about the center line on the graticule If...

Страница 199: ...t 3 dB point 707 X using DATA knob See Figure 3 45 for location of adjustment 15 Press MARKER a Adjust marker to 3 dB point on opposite side of signal CRT MKR A annotation indicates 1 00 X There are now two markers one on each side of the signal at the 3 dB point 16 CRT MKR A annotation now indicates the 3 dB bandwidth of the 1 MHz bandwidth 3 dB bandwidth should be 1 00 fO 10 MHz 17 Key in G G BW...

Страница 200: ... of signal CRT MKR A annotation indicates 1 00 X 28 CRT MKR A annotation now indicates the 3 dB bandwidth of the 10 kHz bandwidth 3 dB bandwidth should be 10 0 fl O kHz 29 Key in YiGBW 3 kHz and CFREQUENCY SPAN 5 kHz If necessary readjust REFERENCELEVEL and CENTER FREQUENCY using DATA knob to place signal peak near top of graticule and centered on center graticule line 30 Press MARKER OFF then MAR...

Страница 201: ...enuators to the RF INPUT and keying in the REFERENCE LEVEL necessary to activate each of the gain steps while compensating for the increased gain with the step attenuators The 1 dB gain steps are checked in the same fashion as the 10 dB gain steps and then the variable gain is adjusted The 18 4 MHz oscillator frequency is adjusted to provide adequate adjustment range of front panel FREQ ZERO contr...

Страница 202: ...ch to ON and press NSTR PRESET Connect CAL OUTPUT to RF INPUT 4 Key in CENTER FREQUENCY 20 MHz R E F E R E N C E L E V E L 1 0 dBm ATTEN 0 dB FREQUENCY SPAN 0 Hz BW 1 kHz l 1 100 Hz and SWEEP TIME 20 ms IF Gain Adjustment 5 Disconnect cable 97 white violet from A4A8Jl and connect cable to power meter power sensor Refer to Figure 3 47 for location of cable 97 and A4A8Jl 6 Adjust front panel AMPTD C...

Страница 203: ...nuators to 35 dB 16 Adjust A4A5R32 SGlO for MKR A level of OO dB CRT MKR A annotation is now in upper right corner of CRT display See Figure 3 48 for location of adjustment A4A5 S T E P LAIN R32 R44 R54 SGIO SG20 1 R70 R62 A4A5 Figure 3 48 Location of 10 dB Gain Step Adjustments 17 If A4A5R32 SGlO adjustment does not have sufficient range to perform adjustment in step 16 increase or decrease the v...

Страница 204: ...EL 11 9 dBm Set step attenuators to 7 dB 28 MKR A level should be OO ho 5 dB If not increase or decrease the value of A4A5R62 Refer to Ihble 3 3 for range of values l dB Gain Step Adjustment 29 Key in LIN SHIFT AUTO resolution bandwidth and REFERENCE LEVEL 19 9 dBm Set step attenuators to 13 dB Press MARKER nl twice to establish a new reference 30 Key in REFERENCE LEVEL 18 0 dBm Set step attenuato...

Страница 205: ...icule line 39 If proper indications are not achieved increase or decrease value of A4A5C9 and repeat adjustment from step 33 Refer to Table 3 3 for range of values 40 Press INSTR PRESET and IRECALL 41 Adjust front panel FREQ ZERO to peak the signal trace on the CRT 1OV Temperature Compensation Supply Adjustment 42 Connect DVM to A4A5TPl 1OVF 43 If DVM indication is between 9 V dc and 10 0 V dc no ...

Страница 206: ...the level of the narrow bandwidth signal Optionally the input signal is removed and the IF signal is monitored at the output of the Bandwidth Filters using a spectrum analyzer with an active probe The 18 4 MHz Local Oscillator and all harmonics are then adjusted for minimum amplitude HP 85024A HIGH FREOUENCY PROBE PWER SUPPLY Figure 3 50 Down Up Converter Adjustments Setup Spectrum Analyzer HP 856...

Страница 207: ...z CENTER FREQUENCY 18 4 MHz RF ATTENUATION 10 dB REFERENCE LEVEL 0 dBm SCALE LOG 10 dB div 4 Connect the second spectrum analyzer to A4A4TP7 using and active probe See Figure 3 50 for test setup 5 Adjust A4A6AlC31 18 4 MHz NULL to null the 18 4 MHz Local Oscillator signal and all displayed harmonics See Figure 3 51 for location of adjustment A4A6 D O W N U P C O N V E R T E R R2 1 18 4 NIJLL WIDE ...

Страница 208: ...the following settings CENTER FREQUENCY 21 4 MHz RESOLUTION BANDWIDTH 100 kHz FREQUENCY SPAN 200 Hz REFERENCE LEVEL _ 30 dBm INPUT ATTENUATION 10 dB SCALE _ LOG 1 dB div 4 Measure the signal at A4A6A2TP4 using the active probe and record below The signal level should be approximately 33 dBm Signal level at TP4 dBM 5 Change the center frequency of the spectrum analyzer used for measuring the signal...

Страница 209: ...rocedure does not adjust the short term stability or long term stability of the 10 MHz Quartz Crystal Oscillator which are determined by characteristics of the particular oscillator and the environmental and warmup conditions to which it has been recently exposed The spectrum analyzer must be ON continuously not in STANDBY for at least 72 hours immediately prior to oscillator adjustment to allow b...

Страница 210: ...d oven to remain at thermal equilibrium minimizing frequency drift due to temperature variations The OVEN COLD message should typically appear on the spectrum analyzer display for 10 minutes or less after line power is first applied to the RF Section Note The rear panel FREQ REFERENCE switch enables or disables the RF Section 20 Vdc switched supply which powers the oscillator circuits in the A27 1...

Страница 211: ...in STANDBY and undisturbed for an additional 24 hours 11 Repeat steps 3 through 7 and record the frequency of the A27 10 MHz Frequency Standard as reading 2 Reading 2 mHz 12 If the difference between reading 2 and reading l is greater than 1 mHz the A27 10 MHz Frequency Standard has not achieved its specified aging rate the spectrum analyzer should remain powered not in STANDBY and undisturbed for...

Страница 212: ...ay from the oscillator circuit shifting the operating conditions 17 18 19 20 Use a nonconductive adjustment tool to adjust the 18 turn FREQ ADJ capacitor on the A27Al 10 MHz Quartz Crystal Oscillator for a Frequency Counter indication of 0 00 Hz See Figure 3 53 for the location of the A27Al 10 MHz Quartz Crystal Oscillator R F S e c t i o n b o t t o m view A27Al Figure 3 53 Location of A27Al Adju...

Страница 213: ...nd warmup conditions to which it has been recently exposed The spectrum analyzer must be ON continuously not in STANDBY for at least 72 hours immediately prior to oscillator adjustment to allow both the temperature and frequency of the oscillator to stabilize FREPUENCY STANDARD 14 Figure 3 54 Time Base Adjustment Setup Frequency Standard HP 5061A B Frequency Counter HP 5334A B Cables BNC cable 122...

Страница 214: ...he spectrum analyzer display for 10 minutes or less after line power is first applied to the RF Section Note The rear panel FREQ REFERENCE switch enables or disables the RF Section 20 Vdc switched supply which powers the oscillator circuits in the A27 10 MHz Frequency Standard This switch must be set to INT and the spectrum analyzer must be switched ON continuously not in STANDBY for at least 72 h...

Страница 215: ...rd the frequency of the A27 10 MHz Frequency Standard as reading 2 Reading 2 mHz 12 If the difference between reading 2 and reading l is greater than 1 mHz the A27 10 MHz Frequency Standard has not achieved its specified aging rate the spectrum analyzer should remain powered not in STANDBY and undisturbed for an additional 24 hour interval Then repeat steps 3 through 7 recording the frequency of t...

Страница 216: ...Frequency Counter indication of 0 00 Hz See Figure 3 55 for the location of the A27A2 10 MHz Quartz Crystal Oscillator R F S e c t i o n b o t t o m view Figure 3 55 Location of A27A2 Adjustment On the Frequency Counter select a 10 second gate time by pressing GATETIME 10 C 1 The Frequency Counter should now display the difference between the frequency of the INPUT A signal and 10 0 MHz with a res...

Страница 217: ...Time Base Finally the COMB DRIVE and CAL OUTPUT are adjusted for proper power levels SYNTHESIZER LEVEL 6 GENERAT R 0 I SPECTRUM ANALYZER POWER METER DIGITAL VOLTMETER Devise Under Teat Figure 3 56 20 MHz Reference Adjustments Setup Spectrum Analyzer HP 8566A B Digital Voltmeter DVM HP 3456A Frequency Synthesizer HP 3335A Power Meter HP436 A Power Sensor HP8482 Digitizing Oscilloscope HP 54501A 1O ...

Страница 218: ...6A B Soectrum Analyzer and set REFERENCE LEVEL to place of signal at reference line top graticule line 6 Set HP 8566A B Spectrum Analyzer to 1 dB division SCALE and reset reference level to place peak of signal at reference line 7 Connect DVM to A16TPl and ground to A22 TP12 Adjust Al6 COMB DRIVE A16R31 for DVM indication of 0 1 V dc Disconnect DVM If DVM remains connected it may load circuit See ...

Страница 219: ...l O dB 15 Connect power meter to A16J4 through cable 3 orange Power meter indication should be at least 15 dBm Reconnect cable 3 orange to A6J2 16 Connect power meter to A16J5 through cable 4 yellow Power meter indication should be at least 10 dBm Reconnect cable 4 yellow to A8Jl 17 On the oscilloscope key in RECALL mj to perform a soft reset 18 Connect the channel 1 probe to the oscilloscope s re...

Страница 220: ... signal I 6 0 0 0 0 is 4 0 0 0 0 S 1 4 0 0 0 0 ns 2 0 0 ns dlv 1 f800 0mV Figure 3 58 Typical Signal at A16TP3 22 Install Al6 20 MHz Reference without extenders and reconnect cable 7 violet to A16J3 23 Connect power meter to front panel CAL OUTPUT 24 Adjust A26 CAL LEVEL A16R51 for power meter indication of 10 0 dBm f0 2 dB 25 the A23A6 Comb Generator must be readjusted after adjusting the 20 MHz ...

Страница 221: ...or and the oscillator frequency is adjusted to produce the proper dc voltage output for each frequency low end and high end Next the 500 kHz Trap is adjusted to null the 500 kHz sidebands using the sixth harmonic of the 249 MHz signal SPECTRLM ANALYZER DIGITAL VOLTMETER SPECTRUM ANALYZER 1 J Figure 3 59 249 MHz Phase Lock Oscillator Adjustments Setup Spectrum Analyzer HP 8566A B Amplifier HP 8447F...

Страница 222: ... for location of adjustment A7 2 4 9 M H z P H A S E L O C K O S C I L L A T O R Figure 3 60 Location of 249 MHz Phase Lock Oscillator Adjustments Key in CENTER FREQUENCY 37 1 MHz DVM indication should be between 12 9 V dc and 16 9 V dc If DVM indication is within the given range disconnect DVM from A7TPl and proceed to step 18 Otherwise key in CRAVE_ 2 SET LINE switch to STANDBY and place A7 249 ...

Страница 223: ...t the cable 9 white when finished 21 Press G iG on the HP 8566A B Spectrum Analyzer and key in FREQUENCY SPAN 5 MHz CENTER FREQUENCY 1547 MHz SPEAK SEARCH and t 1 22 On the HP 8566A B Spectrum Analyzer key in SIGNAL TRACK FREQUENCY SPAN 10 kHz cm 300 Hz REFERENCE LEVEL 50 dBm and CATTEN 0 dB 23 On the HP 8566A B Spectrum Analyzer turn off SIGNAL TRACK_ and set CF STEP SIZE to 500 kHz on the HP 856...

Страница 224: ......

Страница 225: ...e Lock Oscillator Adjustment A18 2 7 5 MHz P H A S E L O C K O S C I L L A T O R 10 U I1 C8 PLO ADJUST A18 Figure 3 62 Location of 275 MHz PLO Adjustment 7 Disconnect test equipment from instrument Adjustments 3 l 11 ...

Страница 226: ...ld be greater than 14 dB and less than 17 dB A spectrum analyzer is used to view the output of the 280 MHz Oscillator on the A20 Third Converter and the oscillator is centered in its adjustment range SYNTHESIZED WEEPER SPECTRLM ANALYZE PCYhER METER 2 0 dB ATTENUATOR NETWORK ANALYZER SPECTRUM ANALYZER Dovisa Under Tut Figure 3 63 Second IF Amplifier Adjustments Setup Equipment Spectrum Analyzer HP ...

Страница 227: ...thesized sweeper Connect Power meter to other power splitter port and set synthesized sweeper POWER LEVEL for Power Meter indication of 20 0 60 1 dBm Disconnect Power Meter and connect power splitter output to A19J1 using adapter and a BNC to SMB test cable Refer to Figure 3 64 Connect A19J2 to A input of scalar network analyzer using adapter and another BNC to SMB test cable Connect synthesized s...

Страница 228: ...to the 3 dB point on the high side on the filter response The cursor A should read 0 fO l dB A19 2ND A20 3RD I F A M P L I F I E R C O N V E R T E R A19 Ll AMPTD A20 Figure 3 64 Location of 301 4 MHz BPF and 280 MHz AMPTD Adjustments Figure 3 65 301 4 MHz Bandpass Filter Adjustment Waveform On the synthesized sweeper press IIv13 and set the Marker to the 3 dB point on the low side of the filter re...

Страница 229: ...typical response when the bandpass filter is properly adjusted 2 8 0 MHz Figure 3 66 Minimum Image Response at 258 4 MHz 23 Repeat the adjustments in steps 13 and 22 to assure that the bandpass is between 7 MHz and 14 MHz and the image response at 258 4 MHz is minimized Remember to use the appropriate set up for steps 13 and 20 24 25 26 27 28 Disconnect the cables from A19Jl and A19J2 and reconnec...

Страница 230: ...Hz and a gain of greater than 10 dB SYNTHESIZED WEEPER POAFR METER NETWRK ANALYZER Figure 3 67 Pilot Second IF Amplifier Adjustments Setup Equipment Synthesized Sweeper HP 8340A B Scalar Network analyzer HP 8757A Power Splitter HP 11667A Opt 001 Power Meter HP436 A Power Sensor HP8482 A Detector 2 required HP 11664A 20 dB Attenuator HP 8491A Opt 020 Adapters Type N f to APC 3 5 f 1250 1745 Type N ...

Страница 231: ...Connect A9J2 to A input of scalar network analyzer through detector using adapter and another BNC to SMB test cable 9 Connect synthesized sweeper SWEEP OUTPUT rear panel Z AXIS BLANK MKRS rear panel and PULSE MODULATION INPUT front panel to proper rear panel connectors on scalar network analyzer shown in Figure 3 67 10 On scalar network analyzer turn channel 2 off and press m A R 11 Set the scalar...

Страница 232: ... 3 dB point on the low side of the filter response fO 1 dB 16 Press cursor A and set the cursor to the 3 dB point on the high side on the filter response The cursor A should read 0 kO 1 dB 17 Press on synthesized sweeper and set to three divisions down 3 dB from top of bandpass filter response Press M4 and set to three divisions down on opposite side of bandpass filter response 18 Press MKR A on s...

Страница 233: ...e adjusted each to within its tolerance Next the Start and Stop frequencies are adjusted FM Span is adjusted next for the proper amount of FM deviation SPECTRUM ANALYZER DIGITAL VOLTMETER FREPUENCY COUNTER Figure 3 70 Frequency Control Adjustments Setup Digital Voltmeter DVM HP 3456A Frequency Counter HP 5340A 1 Place instrument on right side with IF Display facing right as shown in Figure 3 70 an...

Страница 234: ...indicate SWEEP GEN measured sweep time 1 second start up time Note The start up time measured in step 8 uses the sHIFTl BW r function that displays a sweep time value which is 1 to 5 longer than the actual spectrum analyzer sweeptime This error is compensated when using the shift F function to adjust the sweep times in the following procedure 9 Key in Marker loFF then ml Slow Sweep 10 Key in SHIFT...

Страница 235: ...22R91 for the target sweeptime Adjusting A22R91 to 3 times the difference noted in step 12 is only needed if the difference noted in step 12 is greater than 0 3 ms 14 YTO and VT0 DAC 15 Adjustments 16 17 18 19 20 21 Repeat the adjustments in step 8 through step 13 until the measured sweep time at 20 ms is 20 ms plus the Start Up Time measured in step 11 fO 1 ms and the measured sweep time at 1 s i...

Страница 236: ...indicate DACS 0 27 Adjust A22 START A22R39 for frequency counter indication of 2 050 GHz f 0 002 GHz See Figure 3 71 for location of adjustment 28 Key in ISHIFT CCF STEP SIZE J 1023 MHz CRT annotation should indicate DACS 1023 29 Adjust A22 STOP A22 STOP A22R35 for frequency counter indication of 3 7891 0 002 GHz See Figure 3 71 for location of adjustment Press INSTR PRESET then key in CENTER FREQ...

Страница 237: ...the Pilot IF Bandpass Filter is adjusted for proper bandpass and amplitude then the signal IF Bandpass Filter is adjusted The second LO frequency and shift are checked and readjusted if necessary SYNTHESIZED WEEPER 2 0 dB ATTENUATOR R POWER METER PDWER SENSOR Figure 3 72 Second Converter Adjustments Setup Equipment Frequency Counter HP 5340A Scalar Network Analyzer HP 8757A Synthesized Sweeper HP ...

Страница 238: ...iver 08555 20121 and hex nut driver 08555 20122 Place the allen driver through the center hole of the hex nut driver Loosen the adjustment nut using the hex nut driver while adjusting the bandpass with the allen driver Do not over tighten the nut on the second converter 4 Connect the amplifier s input to A23A3J3 and the power meter to the amplifier s output 5 Adjust A23A3 2ND MIXER A23A3Z4 for max...

Страница 239: ...t power meter to the amplifier s output 19 Shift Second LO up and down using m m u and SHIFT a T while adjusting A23A3 PILOT 2ND MIXER A23A3Z8 for equal power out in both states of Second LO 20 Power difference between Second LO shifted up and shifted down should be less than 0 5 dB 21 Disconnect amplifier s input from A23A3J4 and connect to A23A3J3 22 Shift Second LO up and down using SHIFTY a u ...

Страница 240: ...ob 34 On the synthesized sweeper press m ON MKR SWEEP and FJ Set WEEP TIME to 500 ms 35 Adjust REF LEVEL for a mid screen response of the bandpass signal on the scalar network analyzer 36 Connect the test cable from the power splitter output arm to A23A3J2 Pilot First IF IN 37 Connect cable 80 gray black from A23A3J6 PILOT 2ND IF to the scalar network analyzer s A input Set Cm to 10 dB DIV 38 On t...

Страница 241: ... press CURSORJ Max Press cursor A ON and set the cursor at the 3 dB point fO l dB Press cursor A cursor A and set the cursor to the corresponding 3 dB point on the opposit side of the signal The cursor should now read 0 fO l dB 45 On the synthesized sweeper press Irvr3 and place the marker on either cursor A Press M4 and place the marker on the cursor A on the opposite side of the trace 46 On the ...

Страница 242: ...on Scalar network analyzer A typical properly adjusted bandpass filter response is shown in Figure 3 76 and Figure 3 77 See Figure 3 73 for location of adjustments The bandpass response should be 222 MHz 1i i i i ii i I Figure 3 76 Typical Bandpass SHIFT T Figure 3 77 Typical Bandpass SHIFT 1 51 Keyin u and note amplitude of the bandpass signal peak Key in SHIFT a T and note amplitude of the bandp...

Страница 243: ... read the bandpass M3 M4 shown on the ENTRY DISPLAY Press C 1 OFF See Figure 3 74 and Figure 3 75 57 Disconnect all test equipment from HP 8568B Spectrum Analyzer and reconnect all cables within the instrument cable 80 gray black between A23A3J6 and A9J1 and cable 92 white red between A23A3J5 and A19Jl 58 Connect HP 8568B Spectrum Analyzer CAL OUTPUT to SIGNAL INPUT 2 Key in CENTER FREQUENCY 20 MH...

Страница 244: ... low and high end by setting the tune voltage to the proper levels to tune the VT0 to its low and high end limits 42 5 MHz and 57 5 MHz This is done using the output of the tuning DACS from the A22 Frequency Control therefore it is necessary that the DAC adjustments on the Frequency Control have been performed before adjusting the 50 MHz VTO SPECTRUM ANALYZER DIGITAL VOLTMETER peJy jjqy Figure 3 7...

Страница 245: ...ustments and perform YTO and VT0 DAC adjustments 7 On the HP 3456A press MATH off Positive Supply 8 Key in ENTER FREQUENCY 1 MHz FREQUENCY SPAN 1 MHz Adjustment Connect DVM to AllTP5 and ground lead to Al 1 cover 9 Key in ISHIFT CF STEP SIZE J 12 kHz CRT annotation should indicate DACS 12 10 Key in SHIFT MKRW1 N CRT annotation should indicate VT0 frequency of approximately 28 75 MHz This correspon...

Страница 246: ...r VT0 frequency indication of 21 250 MHz 0 005 MHz See Figure 3 78 for location of adjustment 24 Repeat steps 21 through 23 until specifications of steps 20 and 23 are achieved 25 Go back to step 15 and repeat both High Frequency End and Lo Frequency End adjustments until specifications of both contained in steps 16 18 21 and 23 are achieved VT0 26 Key in KEj CF STEP SIZE J 512 kHz and Cm m N Cent...

Страница 247: ...ayed on the HP 8568B Spectrum Analyzer CRT and the slope compensation TILT adjustment is performed to compensate for the frequency response roll off of the first mixer SYNTHESIZED WEEPER PDWER METER PCMR SENSOR ADAPTER kd wPMR SPLITTER Figure 3 80 Slope Compensation Adjustment Setup Equipment Synthesized Sweeper HP 8340A B Power Meter HP436 A Power Sensor HP8482 A Power Splitter HP 11667A Opt 001 ...

Страница 248: ...RANGE HOLD turning it on 7 On the synthesized sweeper press POWER LEVEL and adjust the ENTRY knob for a power meter indication of 10 00 dBm kO 03 dB at 100 MHz 8 On the synthesized sweeper press cm LEVELING and adjust the ENTRY knob REF in dBV with ATN 0 dB for a power meter indication of 10 00 dBm f0 03 dB at 100 MHz Note Do not vary the synthesized sweeper POWER LEVEL setting internal leveling o...

Страница 249: ...ness is achieved when the maximum number of frequency points are on or near the 14 dBm reference A22 F R E O U E N C Y C O N T R O L I A I I I I R66 T I L T Figure 3 81 Location of A22R66 TIIIT Adjustment 15 Press TRACE A m PEAK SEARCH and MARKER DELTA Using the data knob place the marker on the lowest power peak The marker s absolute value should be less than 2 dB 16 See Figure 3 82 for examples ...

Страница 250: ... The phase lock flags are disabled using a shift key function to prevent the instrument from locking up due to the phase lock loops being open A display line is placed on the CRT at the level to which the comb teeth are to be adjusted the comb teeth are adjusted for best overall flatness and to the proper amplitude R31 COMB DRIVE A23A6 COMB ENt IRATOR I Ii A6C7 HF PEAK Benenth C o v e r A612 COMB ...

Страница 251: ...djust comb generator Key in START FREQ 40 MHz Wait for CRT annotation at lower left of CRT display to indicate START 40 MHz Key in mFRE9 1560 MHz Wait for CRT annotation at lower right of CRT display to indicate STOP 1560 MHz Key in REFERENCE LEVEL 20 dBm ATTEN 0 dB LOG ENTER dB DIv 2 dB DISPLAY LINE ENTER 30 dBm Adjust Al6 COMB DRIVE A16R31 for peak amplitude of CRT trace until comb teeth begin t...

Страница 252: ... 83 for location of adjustment 17 If the highest frequency comb tooth is too low c 36 dBm remove screws from cover of A23A6 Comb Generator and lift cover from housing being careful not to break wire connections to internal circuit It will be necessary to hold cover away from housing while performing the following adjustment 18 Adjust A23A6 HF PEAK A23A6C7 for maximum amplitude of the highest frequ...

Страница 253: ...dc the left graticule edge trace position 1 is set and when the sweep ramp input is at 10 V de the right graticule edge trace position 1000 is set This procedure requires a 10 V dc source which is stable and noise free A simple supply circuit which can be built with common components is illustrated in Figure 3 93 If these components are unavailable the alternate procedure provided below using only...

Страница 254: ...pe settings as follows amplitude scale 0 1 V div time scale 5 0 s coupling dc f Adjust A3A8R6 OFFS for a square wave displayed on the oscilloscope The square wave should be approximately 4 Vp p See Figure 3 86 for location of adjustment A3A8 A N A L O G T O D I G I T A L C O N V E R T E R B e n e a t h C o v e r R5 RE G A I N O F F S Figure 3 86 Location of Analog To Digital Converter Adjustments ...

Страница 255: ...voltage as indicated by the DVM approximately 2 0 V ac See Figure 3 86 for location of adjustment g Remove short from A3A8TP4 and A3A8TP5 Reconnect cable 0 black to A3A8J 1 h Press NSTR PRESET i Connect DVM to A3A8TP5 and ground to A3A8TP4 Set DVM for V dc j Press SWEEP C 1 Note DVM reading at end of the sweep The voltage will begin to drift immediately after the sweep ends Therefore the first ind...

Страница 256: ...re 1 Place instrument upright as shown in Figure 3 87 with top and A3 Digital Storage covers removed 2 Set LINE switch to ON and press INSTR PRESET 3 Connect CAL OUTPUT to RF INPUT 4 Connect DVM to A3A9TP3 and ground to A3A9TPl 5 Key in CCENTER FREQUENCY 20 MHz FREQUENCY SPAN 0 Hz 6 Disconnect cable 7 violet from A4AlJl 7 Short A3A9TPl to A3A9TP3 or use an SMB snap on short to A3A9Jl DVM indicatio...

Страница 257: ...CE A m e 15 Remove short from between A3A9TPl and A3A9TP3 or remove the SMB short from A3A9Jl Reconnect cable 7 violet to A4AlJl 16 Connect the DVM to A4AlTP3 Connect DVM s ground to the IF section s casting 17 Press REFERENCE LEVEL and adjust DATA knob and front panel AMPTD CAL adjust for a DVM indication of 2 000 fO OO1 V dc at A4AlTP3 18 Disconnect DVM from instrument 19 Key in Cm TRACE A CLEAR...

Страница 258: ... and Hold Adjustments 24 Adjust A3A9R52 GNEG for MARKER A level indication as indicated by CRT annotation of 100 ho 1 dB 25 Repeat steps 4 through 24 until no further adjustments are required 3 144 Adjustments ...

Страница 259: ...old Balance adjustments are performed The horizontal and vertical Offset and Gain adjustments are performed then the final CRT graticule adjustments are performed Last the CRT annotation adjustments are performed to place the CRT annotation in proper location with respect to the CRT graticule DIGITAL VOLTMETER Figure 3 89 Digital Storage Display Adjustments Setup Digital Voltmeter DVM HP 3456A Dig...

Страница 260: ...nes just meet the horizontal graticule lines at the top and bottom of the graticule See Figure 3 90 for location of adjustment 8 Repeat steps 6 and 7 until horizontal and vertical lines are adjusted so that they meet the edges of the graticule but do not overshoot 9 Adjust A3A2R12 LL THRESH fully counterclockwise 10 Adjust A3A3R7 XSL so that horizontal graticule lines just meet the vertical gratic...

Страница 261: ... 3 91 19 Adjust A3A2R50 X S H BAL for minimum de offset between the level of the signal inside the two pulses to the signal level outside the two pulses Figure 3 91 shows a properly adjusted waveform Figure 3 92 shows the waveform before adjustment Refer to Figure 3 90 for location of adjustment 1 50 0 rnV dlV ioffset 0 0 0 0 V 10 00 I dC 2 9000d us 4 600 ns 2 1 0 0 0 0 us 5 0 0 ns div 4 f300 5rnV...

Страница 262: ... may be made easier by adjusting A3AlR34 SWP OFFSET so that the first peak is centered on the left edge graticule line then adjusting A3A3R4 X GAIN for two cycles per division with the twentieth cycle being centered on the right edge graticule line A3AlR34 SWP OFFSET must then be readjusted so that the trace begins at the left edge graticule line See Figure 3 90 for location of adjustment Remove t...

Страница 263: ... right left top or bottom but does not overshoot 47 Adjust A3A2R12 LL THRESH clockwise until all graticule lines switch over to long lines This is indicated by a noticeable increase in graticule line intensity All graticule lines should increase in intensity X and Y Expand 48 Press QNSTR PRESET Adjustments 49 Key in MARKER NORMAL 50 Adjust A3A3Rl X EXP to center the letter F in REF CRT annotation ...

Страница 264: ...3 0757 0442 0757 0442 0757 0465 0757 0290 2loo 2733 0757 0280 0757 0280 3101 1792 1826 0092 1902 0049 1902 0049 CD 9 CAPACITOR FXD Ol pf CONNECTOR BNC RESISTOR FXD 1 96K 1 125W RESISTOR FXD 10K 1 125W RESISTOR FXD 10K 1 125W RESISTOR FXD 1OOK 1 125W RESISTOR FXD 6 19 K 1 125W RESISTOR VARIABLE 50K 20 RESISTOR FXD 1K 1 125W RESISTOR FXD 1K 1 125W SWITCH TOGGLE S POSITION IC DUAL OP AMP DIODE BREAKD...

Страница 265: ...Hz IF crystal filter bypass networks used with the A4A7 assembly Four 3 MHz bypass networks are required 21 4 MHz 3 MHz BYPASS BYPASS CAPACITOR 1 oop CAPACITOR 047 i Figure 3 94 Crystal Filter Bypass Network Configurations lhble 3 8 Crystal Filter Bypass Network Configuration for A4A4 and A4A8 21 4 MHz Part Value Qty CD HP Part Number Resistor 31 662 2 2 0698 7200 Capacitor 100 pF 2 9 0160 4801 Ca...

Страница 266: ...der Impulse Bandwidths The procedures included in this chapter are listed below 6 dB Bandwidths Performance Tests Test 4 6 dB Resolution Bandwidth Accuracy Test 4 2 Test 5 6 dB Resolution Bandwidth Selectivity Test 4 10 Adjustment Procedure A d j u s t m e n t 9 6 dB B a n d w i d t h A d j u s t m e n t s 4 2 3 Impulse Bandwidths Performance Tests Test 4 Impulse and Resolution Bandwidth Accuracy ...

Страница 267: ... dBm 4 Press SCALE LIN pushbutton Press SH FT my resolution bandwidth for units in dBm 5 Adjust REFERENCE LEVEL to position peak of signal trace at or just below reference level top graticule line Press SWEEP SINGLE_ 6 Press MARKER NORMAL and place marker at peak of signal trace with DATA knob Press MARKER and position movable marker 6 dB down from the stationary marker on the positive going edge ...

Страница 268: ......

Страница 269: ...trum analyzer iZZiZK function The CAL OUTPUT signal is used as a stable signal source to measure the 6 dB resolution bandwidths SPECTRUM ANALYZER SYNTHESIZER LEVEL GENERATOR P PULSE FUNCTION GENERATOR J EXT OUTPU INPUT L IT I 816NAL INPUT 9 Figure 4 2 Impulse Bandwidth Test Setup Equipment Frequency Synthesizer HP 3335A Pulse Function Generator HP 8116A Procedure 1 Set the frequency synthesizer fo...

Страница 270: ......

Страница 271: ...trum analyzer key in REs 30 kHz i _ _ fVll3FC l RW 300 kHz CCENTER FREQUENCY 300 kHz FREQUENCY SPAN 120 kHz SWEEP TIME IAUTO SWEEP GiF MARKER CPEAK SEARCH Record MARKER amplitude in Table 4 2 Set the frequency synthesizer CFREQUENCY to 3 kHz On the spectrum analyzer key in FREQUENCY SPAN 0 Hz SWEEP TIME 0 5 seconds SWEEP FZF MARKER PEAK SEARCH Record MARKER amplitude in Table 4 2 Calculate the Imp...

Страница 272: ......

Страница 273: ...dwidth setting using the procedure of steps 43 through 45 and record the value in Table 4 3 The measured bandwidths for 300 Hz 100 Hz 30 Hz and 10 Hz should fall between the limits shown in the table Ihble 4 2 Impulse Bandwidth Accuracy paiq 4 8 Option 462 3 MHz i 1 MHz i 300 kHz i 100 kHz i 30 kHz i 10 kHz i 3 kHz i 1 kHz i Marker Readouts for TCalculated Imrmlse Bandwidth 1EIigh Frequency Low Fr...

Страница 274: ... MHz i 1 MHz i 300 kHz i 100 kHz i 30 kHz i 10 kHz i 3 kHz i 1 kHz i 300 Hz i 100 Hz i 30 Hz i 10 Hz i 1 T Frequency Span MARKER A Readout of 6 dB Bandwidth Minimum 5 MHz 2 MHz 500 kHz 200 kHz 50 kHz 20 kHz 5 kHz 2 kHz 300 Hz 100 Hz 30 Hz 10 Hz Actual T Maximum 450 Hz 150 Hz 45 Hz 15 Hz 1 Option 462 4 9 ...

Страница 275: ...st be performed before starting this test 1 Press INSTR PRESET 2 Connect CAL OUTPUT to SIGNAL INPUT 2 3 Key in analyzer control settings as follows C E N T E R F R E Q U E N C Y 20 MHz FREQUENCY SPAN Ti 20 MHz 3 MHz iEEDiJ 100 Hz SWEEP iiYZ 4 Press MARKER C 1 and position marker at peak of signal trace Press MARKER and position movable marker 60 dB down from the stationary marker on the positive g...

Страница 276: ...e in Table 4 4 Record the 6 dB bandwidths from Table 4 l in Ikble 4 4 Calculate the bandwidth selectivity for each setting by dividing the 60 dB bandwidth by the 6 dB bandwidth The bandwidth ratios should be less than the maximum values shown in fable 4 4 The 60 dB bandwidth for the 10 Hz resolution bandwidth setting should be less than 100 Hz REF 0 0 dBm ATTEN 10 d0 o dB MKEl A 14 04 Mb 30 al3 1 ...

Страница 277: ...trum Analyzer 20 MHz 15 MHz 5 MHz 2 MHz 500 kHz 200 kHz 50 kHz 10 kHz 5 kHz 2 kHz 500 Hz 100 HZ VlDEoj 100 Hz 300 Hz AUTO AUTO AUTO AUTO AUTO AUTO AUTO AUTO AUTO AUTO TMeasured 60 dB 3andwidth Measured 6 dB Bandwidth Bandwidth Selectivity 160 dB BW 6 dB BW Maximum Selectivity Ratio 11 l 11 l 11 l 11 l 8 l 8 l 8 l 8 l 8 l 8 l 8 l 60 dB points separated by cl00 Hz 4 12 Option 462 ...

Страница 278: ......

Страница 279: ...Figure 4 5 and record the value in Table 4 5 6 Select the spectrum analyzer iE V FREQUENCY SPAN and CV DEO according to Table 4 5 Measure the 60 dB bandwidth for each resolution bandwidth setting by the procedure of steps 3 through 5 and record the value in fable 4 5 7 Record the 6 dB bandwidths for each resolution bandwidth setting from Table 4 3 in Table 4 5 8 Calculate the bandwidth selectivity...

Страница 280: ...quency EG Bandwidth Bandwidth 60 dB BW Span Ratio t 6 dB BW 3 MHz i 20 MHz 100 Hz 11 l 1 MHz i 15 MHz 300 Hz 11 l 300 kHz i 5 MHz AUTO 11 l 100 kHz i 2 MHz AUTO 11 l 30 kHz i 500 kHz AUTO 8 l 10 kHz i 200 kHz AUTO 8 l 3 kHz i 50 kHz AUTO 8 l 1 kHz i 10 kHz AUTO 8 l 300 Hz i 5 kHz AUTO 8 l 100 Hz i 2 kHz AUTO 8 l 30 Hz i 500 Hz AUTO 8 l 10 Hz i 100 Hz AUTO 60 dB points separated by cl00 Hz Option 4...

Страница 281: ...f the spectrum analyzer The deviation in peak amplitude of the signal trace is then measured as each resolution bandwidth filter is switched in None required 1 2 3 4 5 Press NSTR PRESET Connect CAL OUTPUT to SIGNAL INPUT 2 Key in the following control settings CENTER FREQUENCY FREQUENCY S P A N 20 MHz 5 MHz 8 dBm 1 MHz Press LOG ENTER dB otv_ and key in 1 dB Press MARKER PEAK SEARCH a Key in setti...

Страница 282: ...ty Measurement T ble 4 6 Bandwidth Switching Uncertainty Res BW 1 MHz i 3 MHz i 300 kHz i 100 kHz i 30 kHz i 10 kHz i 3 kHz i 1 kHz i 300 Hz i 100 Hz i 30 Hz i 10 Hz i Frequency Span 5 MHz 5 MHz 5 MHz 500 kHz 500 kHz 50 kHz 50 kHz 10 kHz 1 kHz 1 kHz 200 Hz 100 Hz Deviation MKR A Readout dB 0 ref AAllowable Deviation 6 W 0 ref f 1 0 zt 0 5 Lt 0 5 f 0 5 f 0 5 f 0 5 f 0 5 f 0 5 f 0 5 zt 0 8 5 2 0 Opt...

Страница 283: ...lution Bandwidth Accuracy FREQUENCY SPAN Readout of 3 dB Bandwidth 5MHz 2 400 MHz 2 MHz 900kHz 500kHz 270 0 kHz 200kHz 90 0 kHz 50kHz 27 00 kHz 20kHz 9 00 kHz 5kHz 2 700 kHz 2 kHz 900Hz 500Hz 270Hz 200Hz 90Hz 100Hz 27 0 Hz 100Hz 10 0 Hz Min Actual Max 3 600 MHz 1 100 MHz 330 0 kHz 110 0 kHz 33 00 kHz 11 00 kHz 3 300 kHz 1 100 kHz 330 Hz 110Hz 33 0 Hz 15 0 Hz 4 18 Option 462 ...

Страница 284: ...Record Test 4 Impulse and Resolution Bandwidth Accuracy Test p o able 2 19 Performance Test Record Steps 1 through 38 Impulse Bandwidth Accuracy Marker Readouts for High Frequency Low Frequency Repetition Rate Repetition Rate Calculated Impulse Bandwidth Minimum Actual Maximum 2 40 MHz 900 kHz 270 kHz 90 kHz 27 kHz 9 kHz 2 7 kHz 900 Hz 3 60 MHz 1 1 MHz 330 kHz 110 kHz 33 kHz 11 kHz 3 3 kHz 1 1 kHz...

Страница 285: ...hrough 46 6 dB Resolution Bandwidth Accuracy Res BW 3 MHz i 1 MHz i 300 kHz i 100 kHz i 30 kHz i 10 kHz i 3 kHz i 1 kHz i 300 Hz i 100 Hz i 30 Hz i 10 Hz i 5 MHz 2 MHz 500 kHz 200 kHz 50 kHz 20 kHz 5 kHz 2 kHz 500 Hz 200 Hz 100 Hz 100 Hz 300 Hz 100 Hz 30 Hz 10 Hz 450 Hz 150 Hz 45 Hz 15 Hz 4 20 Option 462 ...

Страница 286: ... P A N V I D E O 3 MHz 1 MHz 300 kHz 100 kHz 30 kHz 10 kHz 3 kHz 1 kHz 300 Hz 100 Hz 30 Hz 10 Hz 20 MHz 15 MHz 5 MHz 2 MHz 500 kHz 200 kHz 50 kHz 10 kHz 5 kHz 2 kHz 500 Hz 100 HZ 100 Hz 300 Hz AUTO AUTO AUTO AUTO AUTO AUTO AUTO AUTO AUTO AUTO Measured 60 dB Bandwidth Measured Bandwidth Maximum 6 dB Selectivity Selectivity Ratio Bandwidth 60 dB BW t 6 dB BW 11 l 11 1 11 l 11 l 8 l 8 l 8 l 8 l 8 l 8...

Страница 287: ...electivity Selectivity BW Fr f cy f Bandwidth Bandwidth 60 dB BW Ratio 6dBBW 3 MHz i 20 MHz 100 Hz 11 l 1 MHz i 15 MHz 300 Hz 11 l 300 kHz i 5 MHz AUTO 11 l 100 kHz i 2 MHz AUTO 11 l 30 kHz i 500 kHz AUTO 8 l 10 kHz i 200 kHz AUTO 8 l 3 kHz i 50 kHz AUTO 8 l 1 kHz i 10 kHz AUTO 8 l 300 Hz i 5 kHz AUTO 8 l 100 Hz i 2 kHz AUTO 8 l 30 Hz i 500 Hz AUTO 8 l 10 Hz i 100 Hz AUTO 60 dB points separated by...

Страница 288: ... Impulse and Resolution Bandwidth Res BW 1 MHz i 3 MHz i 300 kHz i 100 kHz i 30 kHz i 10 kHz i 3 kHz i 1 kHz i 300 Hz i 100 Hz i 30 Hz i 10 Hz i Switching Uncertainty Frequency Span Deviation MKR A Readout dB 5 MHz 5 MHz 5 MHz 500 kHz 500 kHz 50 kHz 50 kHz 10 kHz 1 kHz 1 kHz 200 Hz 100 Hz 0 ref Allowable Deviation WV 0 ref xt 1 0 It 0 5 0 5 zt 0 5 xt 0 5 0 5 f 0 5 f 0 5 f 0 5 f 0 8 f 2 0 Option 46...

Страница 289: ... should be centered about the center line on the graticule Press PEAK SEARCH MKR a and MARKER al Using the DATA knob adjust the marker down one side of the display signal to the 6 dB point CRT MKR A annotation indicates 500 x Adjust A4A9R60 3 MHz for MKR In indication of 1 5 MHz while maintaining the marker at 500 X using the DATA knob Refer to Figure 4 7 for the adjustment location Press MARKER n...

Страница 290: ... lO MHz 17 Key in RES 300 kHz FREQUENCY SPAN 500 kHz PEAK SEARCH and C 1 If necessary readjust by pressing REFERENCE LEVEL and using the DATA knob to place the signal peak at the top of the graticule 18 Press MARKER m then MARKER iYJ 19 Using the DATA knob adjust the marker down one the displayed signal to the 6 dB point CRT MKR A annotation indicates 500 X 20 Adjust A4A9R62 300 kHz for MKR A indi...

Страница 291: ...he bandwidth should be 10 0 fl O kHz Key in jj 3 kHz FREQUENCY SPAN 5 kHz PEAK SEARCH and MKRJ If necessary readjust by pressing REFERENCE LEVEL and using the DATA knob to place the signal peak near the top of the graticule Press MARKER m and MARKER a Using the DATA knob adjust the marker down one side of the displayed signal to the 6 dB point CRT MKR A annotation indicates 500 X Adjust A4A9R66 3 ...

Страница 292: ...he signal should be centered about the center line on the graticule Press PEAK SEARCH MKR 4 J and MARKER Using the DATA knob adjust the marker down one side of the display signal to the 7 3 dB point CRT MKR A annotation indicates 0 430 X Adjust A4A9R60 3 MHz for MKR In indication of 1 5 MHz while maintaining the marker at 0 430 X using the DATA knob Refer to Figure 4 8 for the adjustment location ...

Страница 293: ... 10 MHz 17 Key in jjj 300 kHz FREQUENCY SPAN 500 kHz CPEAK SEARCH and CMKR If necessary readjust by pressing REFERENCE LEVEL and using the DATA knob to place the signal peak at the top of the graticule 18 Press MARKER IOFF then MARKER 19 Using the DATA knob adjust the marker down one the displayed signal to the 7 3 dB point CRT MKR A annotation indicates 0 430 X 20 Adjust A4A9R62 300 kHz for MKR A...

Страница 294: ...10 kHz bandwidth The impulse bandwidth should be 10 0 fl O kHz 29 Key in E GZT 3 kHz FREQUENCY SPAN 5 kHz PEAK SEARCH and iiGGZQ If necessary readjust by pressing REFERENCE LEVEL and using the DATA knob to place the signal peak near the top of the graticule 30 Press MARKER a and MARKER a 31 Using the DATA knob adjust the marker down one side of the displayed signal to the 7 3 dB point CRT MKR A an...

Страница 295: ...or Option 857 instruments When working on Option 857 instruments substitute the procedure in this chapter for the standard version contained in Chapter 2 The procedure included in this chapter is listed below Performance Tests Test 12 Amplitude Fidelity Test 2 43 Option 857 5 1 ...

Страница 296: ...olution Bandwidth sf0 8 dB max over 0 to 70 dB display 20 30 C sk2 1 dB max over 0 to 90 dB display Linear 3 of Reference Level for top 9 l 2 divisions of display Description Amplitude fidelity in log and linear modes is tested by decreasing the signal level to the spectrum analyzer in 10 dB steps with a calibrated signal source and measuring the displayed amplitude change with the analyzer s MARK...

Страница 297: ... power level of 10 dBm Set the amplitude increment for 10 dB steps Connect equipment as shown in Figure 5 l Press MARKER PEAK SEARCH jMKR MKR REF LVL to center the signal on the display Press SWEEP I on the spectrum analyzer and wait for the sweep to be completed Press MARKER PEAK SEARCH MARKER In Step the frequency synthesizer output amplitude down 10 dB On the spectrum analyzer press SWEEP ml an...

Страница 298: ...lity error for calibrated amplitude steps from 10 dB to 90 dB The results should be sf2 1 dB dB 14 Set the frequency synthesizer for output amplitude to 10 dBm 15 Key in the following analyzer settings FREQUENCY SPAN 100 kHz TTiFV _ 10 kHz SWEEP GF 16 Press MARKER PEAK SEARCH j MKR IREF LVL to center the signal on the display 17 Key in the following analyzer settings FREQUENCY SPAN o Hz k 1 t 1 Hz...

Страница 299: ...hble 5 2 Log Amplitude Fidelity 10 kBz RBW Option 857 2 Fidelity Error MARKER A Amplitude Column 2 Column 1 3 PI 0 ref 0 ref Cumulative Cumulative Error Error 0 to 80 dB 0 to 90 dB WV dB sk1 0 dB 1 5 dB Linear Fidelity 22 Key in analyzer settings as follows iEEEK BW 300 Hz FREQUENCY SPAN_ km 20 kHz 10 kHz 23 Set the frequency synthesizer for an output power level of 10 dBm 24 Press SCALE LIN pushb...

Страница 300: ...12 Option 857 Amplitude Fidelity Test lhble 5 3 Linear Amplitude Fidelity Frequency MARKER A Allowable Range Synthesizer Amplitude 413 of Reference Level Amplitude 1 WV 1 dBm Min Max 5 6 Option 857 ...

Страница 301: ...Performance Test Record Hewlett Packard Company Model HP 8568B Serial No IF Display Section RF Section Tested by Report No Date Option 857 5 7 ...

Страница 302: ... RBW Option 857 Frequency 1 Synthesizer Calibrated Amplitude Amplitude WW Step lO 0 ref 0 10 1 0 2 0 2 0 3 0 3 0 4 0 4 0 5 0 5 0 6 0 6 0 7 0 7 0 8 0 8 0 9 0 2 Fidelity Error MARKER A Amplitude Column 2 Column 1 W 9 W 0 ref 0 ref Zumulative Error 0 to 80 dB WV l O dB 2 Fidelity Error MARKER A Amplitude Column 2 Column 1 PI 1 0 ref 0 ref Zumulative Error 0 to 80 dB WI l O dB Cumulative Error 0 to 90...

Страница 303: ...on 857 Amplitude Fidelity Test Step 26 Linear Amplitude Fidelity Frequency MARKER A Allowable Range Synthesizer Amplitude 1t3 of Reference Level Amplitude dB W WW Min Max 0 10 87 9 21 10 23 10 17 72 Option 857 5 9 ...

Страница 304: ...lAlOC3 6 4 6 5 AlAlOC4 6 4 6 5 AlAll 6 4 AlTl 6 4 6 5 6 7 AlVl 6 4 6 5 6 6 6 7 A3Al 6 4 6 5 A3A2 6 4 6 5 A3A4 6 4 6 5 A3A5 6 4 6 5 A3A6 6 4 6 5 A3A7 6 4 6 5 A3A8 6 4 6 5 A3A9 6 4 6 5 A3AlO 6 7 A4Al 6 4 6 5 A4A2 6 4 6 5 A4A3 6 4 6 5 A4A4 6 4 6 5 A4A5 6 4 6 5 A4A6 6 4 6 5 A4A7 6 4 6 5 A4A8 6 4 6 5 A4A9 6 4 6 5 A4AlO 6 7 Wl 6 6 w2 6 6 w3 6 6 W6 6 4 w7 6 4 W8 6 6 6 7 w9 6 6 W21 6 4 6 5 W23 6 7 Major A...

Страница 305: ...l 6 2 A5Jl 6 3 A5J3 6 3 A5J4 6 3 A5Kl 6 2 A5Rl 6 2 A5Sl 6 2 6 3 A6 6 3 A7 6 3 A8 6 3 A9 6 3 A10 6 3 A l l 6 3 Al2 6 3 Al5 6 3 Al6 6 3 Al7 6 3 Al8 6 3 A19 6 3 A20 6 3 A21 6 3 A22 6 3 A23Al 6 2 A23A2 6 2 A23A3 6 2 A23 6 3 A23Al 6 3 A23A2 6 3 A23A3 6 3 A23A4 6 3 A23A5 6 3 A23A6 6 3 A23ATl 6 3 A23AT2 6 3 A26 6 l A26Fl 6 3 6 2 Major Assembly and Component locations ...

Страница 306: ...3 A26Ql 6 3 A26Q2 6 3 A26Q3 6 3 A26Q4 6 3 A26Q5 6 3 A26Ul 6 3 A27 6 2 6 3 Cl 6 1 6 3 C2 6 1 6 3 C3 6 1 6 3 C4 6 1 6 3 C5 6 1 6 3 FL1 6 4 6 5 Tl 6 3 Wl 6 2 W2 6 2 W3 6 2 W14 6 2 W42 6 2 W43 6 1 6 2 Major Assembly and Component locations 6 3 ...

Страница 307: ...w43 c c5 c4 c3 c2 Figure 6 l RF Section Top View A26 6 4 Major Assembly and Component locations ...

Страница 308: ...423A2 w14 w3 w43 w31 4 2 7 ASA A543 W2 45A2 A5A 1 A5AlJl W42 A5Rl I N P U T S E L E C T KEYBOARD Figure 6 2 RF Section Front View Major Assembly and Component locations 6 5 ...

Страница 309: ...A26 Fl F2 F3 F4 F5 15v 5v 2ov 5v 1 5A 3A 1 5A 6A I 01 020403 05 Ul I WI4 A5i4 A 4 A533 Ai A l 1 d9 A5 J 1 AiSl Figure 6 3 RF Section Bottom View 6 6 Major Assembly and Component locations ...

Страница 310: ...1 AlA AlVl AlA Figure 6 4 IF Section Top View SN 3001A and Below AlAlOCl AlAlOC4 AlA AlA A I i r8 AlA FLi AITI A4A9 A4A8 A4A7 A4A6 A4A5 A4A4 A4A3 A4A2 A4Al A3A9 A3A8 A3A7 A3A6 A3A5 A3A4 A A3 A3A2 A3Al Major Assembly and Component locations 6 7 ...

Страница 311: ...OC4 AlAlOC2 AlAlOC3 w21 AlA AlVl AlA AlA AlA A l AlAS Fl 1 AITI A4A3 A4A8 A4A7 A4A6 A4A5 A4A4 A4A3 A4A2 A4Al i A3Al 0 0 0 Figure 6 5 IF Section Top View SN 3004A and Above 6 8 Major Assembly and Component locations ...

Страница 312: ...AlVl Figure 6 6 IF Section Front View w3 w9 Major Assembly and Component locations 6 9 ...

Страница 313: ...AlAlO I A A A4AlO W8 A3AlO I W24 w23 Figure 6 7 IF Section Bottom View w2g W24 W28 W23 W32 S N 3004A a n d a b o v e AlVl 6 10 Major Assembly and Component locations ...

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