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Model 8640B

TM 9-4935-601-14-7&P

ADJUSTMENTS

5-42.  RF OSCILLATOR END STOP ADJUSTMENT

REFERENCE:

Service Sheets 5, 6, and 7.

DESCRIPTION:

This procedure describes the adjustment of the high and low frequency end stops of the RF Oscillator (A3).  Slight
adjustment of the end stops may be necessary when the RF Oscillator or Fine Tune assembly has been repaired or
replaced.  No special tools are required.

Normally, the adjustment can be made with the RF Oscillator in place.  However, if the oscillator has already been
removed, the adjustment is easier if the Connector Board Assembly (A3A4) is plugged in and the oscillator set into place
with the front resting on the front panel trim strip.  Temporarily connect the RF cable (W2) to the counter and install the
FREQUENCY TUNE knob.

PROCEDURE:

1. Set Signal Generator's controls as follows:

RANGE.................................................................................

0.5-1 MHz

FINE TUNE...........................................................................

Centered

LINE  ....................................................................................

OFF

2. Remove bottom cover.

3. Switch LINE to ON and let instrument warm up for one hour.

4. Check that Varactor Anode bias is -14.70 ± 0.01 Vdc at A7TP2.

5. Tune FREQUENCY TUNE fully ccw.  Compare the position of the stop ring teeth with Figure 5-11.

NOTE

Notice how the teeth on the stop rings line up in a staircase at the end stops.  The stop pin and
the adjustable stop ring determine the lower frequency limit.  The stop pin and forward most
stop ring determine the high frequency limit, however, adjustment of this will also effect the low
frequency limit.

6. Adjust FREQUENCY TUNE fully cw.  The frequency should read between 1.0752 and 1.0760 MHz.

If it does not, note how far off the frequency is.

7. Adjust FREQUENCY  TUNE  ccw until first setscrew on front adjustment collar appears.  Loosen setscrew.

8. Tune further ccw until second setscrew appears.

9. Loosen setscrew and rotate FREQUENCY TUNE up or down by the amount of correction needed (as noted in

step 6), and tighten setscrew.  Do not allow front adjustment collar to rotate.

5-36

Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com

Summary of Contents for 8640B

Page 1: ...s underutilized and idle equipment along with credit for buybacks and trade ins Custom engineering so your equipment works exactly as you specify Critical and expedited services Leasing Rentals Demos In stock Ready to ship TAR certified secure asset solutions Expert team I Trust guarantee I 100 satisfaction All trademarks brand names and brands appearing herein are the property of their respective...

Page 2: ...RAL SUPPORT MAI NTENANCE MANUAL INCLUDING REPAIR PARTS FOR 8640B SIGNAL GENERATOR INCLUDING OPTION 001 PATRIOT AIR DEFENSE GUIDED MISSILE SYSTEM HEADQUARTERS DEPARTMENT OF THE ARMY SEPTEMBER 1986 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 3: ...pacitor likely to hold a dangerous potential When working inside equipment after the power has been turned off always ground every part before touching it Be careful not to contact high voltage connections when installing or operating this equipment When possible keep one hand away from equipment to reduce the hazard of current flowing through the vital organs of the body Read FM 21 11 First Aid f...

Page 4: ...A 1313A 1316A 1322A 1323A 1327A 1332A 1333A 1339A 1342A 1345A 1350A 1401A 1404A 1404A 1405A 1406A 1416A 1419A 1423A 1429A 1431A 1435A 1438A 1440A 1442A 1501A 1506A 1513A 1515A 1519A 1520A 1524A 1526A 1530A 1532A 1534A 1535A 1538A 1542A 1543A 1544A 1545A and 1552A For additional important information about serial numbers see INSTRUMENTS COVERED BY MANUAL in Section I REPORTING ERRORS AND RECOMMENDI...

Page 5: ...1 38 Pulse Modulation 1 4 1 41 Frequency Modulation 1 4 1 44 Standard and Optional Audio Oscillators 1 5 1 47 Multi function Meter and Annunciators 1 5 1 53 Output Level 1 5 1 57 Options 1 6 1 62 Accessories Supplied 1 6 1 65 Equipment Available 1 6 1 72 Warranty 1 7 1 74 Test Equipment Required 1 7 Section II Installation 2 1 Introduction 2 1 2 3 Initial Inspection 2 1 2 5 Preparation for Use 2 1...

Page 6: ...st 4 8 4 16 Frequency Stability vs Load Level and Mode Test 4 9 4 17 Harmonics Test 4 11 4 18 Sub Harmonics and Non Harmonic Spurious Test 4 13 4 19 Single Sideband Phase Noise Test 4 15 4 20 Single Sideband Broadband Noise Floor Test 4 17 4 21 Residual AM Test 4 20 4 22 Residual FM Test 4 21 4 23 Output Level Accuracy Test Abbreviated 4 24 4 24 Output Level Flatness Test 4 29 4 25 Output Level Fl...

Page 7: ... 5 11 Pozidriv Screwdrivers 5 1 5 13 Blade Tuning Tools 5 1 5 15 Service Aids 5 1 5 19 Factory Selected Components 5 2 5 22 Post Repair Test and Adjustments 5 3 5 25 Power Supply Adjustments 5 8 5 26 Fixed Frequency Modulation Oscillator Adjustment 5 8 5 27 Variable Frequency Modulation Oscillator Adjustment Option 001 5 9 5 28 Meter Adjustments 5 12 5 29 RF Detector Offset Adjustment 5 12 5 30 Ou...

Page 8: ...Metering Accuracy Serial Prefix 1229A 7 78 7 11 Elimination of Frequency Shift in Expand X100 Mode Serial Prefix 1229A 7 78 7 14 A8A2 Counter Lock Board Assembly Improvements Serial Prefix 1229A 7 78 7 16 Improved Audio Output Level Accuracy Serial Prefix 1229A 7 80 7 18 A26A1 Power Amplifier and AGC Detector Assembly Improvement Serial Prefix 1229A 7 80 7 20 Reduction of RFI Leakage from Front Pa...

Page 9: ...ow 7 86 7 54 Improved Audio Output Level Flatness Serial Prefixes 1244A through 1316A 7 86 7 56 A8A4 Counter Display Assembly Improvement Serial Prefixes 1323A and Below 7 86 7 58 Improved FM Bandwidth on 5kHz Deviation Range Serial Number Prefixes 1323A and 1327A 7 86 7 60 Improved Noise Performance Serial Prefixes 1327A and Below 7 86 7 62 A10A2 RF Divider Assembly Improvement Serial Number Pref...

Page 10: ...mber Prefixes 1423A and Below 7 89 7 93 REDUCE PEAK POWER Lamp Drive Modification Serial Number Prefix 1526A and Below 7 89 Section VII Service 8 1 Introduction 8 1 8 5 Principles of Operation 8 1 8 8 Troubleshooting 8 1 8 12 Recommended Test Equipment 8 1 8 14 Service Aids 8 1 8 23 Repair 8 3 8 24 Factory Selected Components 8 3 8 26 Etched Circuits 8 3 8 28 Etched Conductor Repair 8 3 8 30 Compo...

Page 11: ...n Index 8 14 8 4 Schematic Diagram Notes 8 15 8 5 Meter Drive Amplifier Data 8 52 8 6 Total Count of Time Base Reference Counters U13 U14 and U15 8 56 8 7 Count Modes of Counters A8A3U13 and U14 8 56 8 8 Count Modes of Counter A8A3U15 8 56 8 9 Data Inputs of Decimal Point Shift Register 8 56 ILLUSTRATIONS Figure Page 1 1 HP Model 8640B Signal Generator Option 001 and Accessories Supplied 1 0 1 2 M...

Page 12: ...Output Impedance Test Setup In Band 4 38 4 14 Output Impedance Test Setup Out of Band 4 40 4 15 Output Leakage Test Setup 4 42 4 16 Internal Modulation Oscillator Test Setup 4 44 4 17 Internal Modulation Oscillator Distortion Test Setup 4 46 4 18 AM 3 dB Bandwidth Test Setup 4 47 4 19 AM Distortion Test Setup 4 49 4 20 AM Sensitivity and Accuracy Test Setup 4 51 4 21 Peak Incidental Phase Modulati...

Page 13: ...U1 Backdating Change E 7 17 7 5 A8A1 RF Scaler Assembly Backdating Change E 7 18 7 6 A12 Rectifier Assembly Backdating Change F 7 19 7 7 A8A1 Scaler Assembly Backdating Change J 7 22 7 8 A8A4 Counter Display Assembly Modification 7 79 7 9 A7 FM Shaping Assembly Modification 7 82 7 10 A9 Peak Deviation and Range Switch Modification 7 23 7 11 AlOA2 RF Divider Assembly Modification 7 26 8 1 Signal Ge...

Page 14: ...Over Deviation Detector and Meter Control Circuits Schematic Diagram 8 33 8 32 All Fixed Frequency Modulation Oscillator Assembly Component Locations 8 35 8 33 Fixed Frequency Modulation Oscillator Schematic Diagram 8 35 8 34 All Variable Frequency Modulation Oscillator Assembly Option 001 Component Locations 8 37 8 35 Variable Frequency Modulation Oscillator Option 001 Schematic Diagram 8 37 8 36...

Page 15: ... 57 8 60 A8A4 Counter Display Assembly Component Locations P O A8 8 59 8 61 P O A8A2 Counter Lock Board Assembly Component Locations 8 59 8 62 Up Down Counter and Display Schematic Diagram 8 59 8 63 P O A8A2 Counter Lock Board Assembly Component Locations 8 61 8 64 Counter Phase Lock Circuits Schematic Diagram 8 61 8 65 Current Foldback 8 62 8 66 A12 Rectifier Assembly Component Locations 8 62 8 6...

Page 16: ...age 1 Overall Block Diagram 8 18 2 FM Circuits and RF Oscillator Troubleshooting 8 20 3 AM AGC Circuits and Output Amplifier Troubleshooting 8 22 4 Counter Lock Circuits Troubleshooting 8 24 5 RF Oscillator A3 8 26 6 FM Amplifiers A3 A5 A9 A13 8 28 7 FM Shaping Circuits and Phase Lock Loop Filter A7 A9 8 30 8 Over Deviation Detector and Meter Control Circuits A6 A7 A9 8 32 9 Fixed Frequency Modula...

Page 17: ...A16 A18 8 64 24 Power Supply Mother Board A17 8 67 25 Modulation Metering Mother Board A13 8 68 A Al Assembly Removal and Disassembly 8 70 B A8 Assembly Removal and Disassembly 8 72 C A9 and All Assemblies Removal and Disassembly 8 74 D A10 Assembly Removal and Disassembly 8 76 E A26 Assembly Removal and Disassembly 8 78 F General Removal Procedures and Top Internal Views 8 80 G Rear Panel and Bot...

Page 18: ... only by a skilled person who is aware of the hazard involved Capacitors inside the instrument may still be charged even if the instrument has been disconnected from its source of supply FUSES Make sure that only fuses with the required rated current and of the specified type normal blow time delay etc are used for replacement The use of repaired fuses and the short circuiting of fuseholders must ...

Page 19: ...y Deficiency Report QDR Mail the QDRs to Commander U S Army Missile Command ATTN AMSMI LC ME PMH Redstone Arsenal AL 35898 5238 A reply will be furnished to you 0 3 ADMINISTRATIVE STORAGE To prepare this unit for placement into and removal from administrative storage refer to section 3 chapter 4 of AR 750 1 Maintenance Equipment and Supplies Temporary storage should be accomplished in accordance w...

Page 20: ...el 5640B TM 9 4935 601 14 7 P Figure 1 1 HP Model 8640B Signal Generator Option 001 and Accessories Supplied 1 0 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 21: ...er is listed on the title page of this manual and on the rear cover of the supplement 1 5 Also listed on the title page of this manual is a Microfiche part number This number can be used to order 4 x 6 inch microfilm transparencies of the manual Each microfiche contains up to 60 photo duplicates of the manual s pages The microfiche package also includes the latest Manual Changes supplement as well...

Page 22: ... The basic frequency source of the Signal Generator is a mechanically tuned high Q cavity oscillator that operates over the frequency range 230 550 MHz This oscillator has an inherent stability of better than 10 ppm 10 min and exceptionally low noise characteristics The lower 9 frequency ranges are obtained by dividing the basic oscillator frequency and filtering the unwanted harmonics Using this ...

Page 23: ...ing the expand modes it is possible for significant digits or the decimal point to be shifted off the display When this occurs an OVERFLOW light reminds the operator that the display is not showing the complete output frequency 1 28 The built in counter can also be used to count external input signals from 1 Hz to 550 MHz and eliminates the need for a separate frequency counter in many measurement...

Page 24: ...requencies Note that for 0 50 AM distortion is 1 to approximately 50 kHz for an output frequency of 200 MHz Figure 1 4 AM distortion us AM rate measured at 200 MHz and 13 dBm but applies to all bands Supplemental information only 1 38 Pulse Modulation 1 39 Also included on the AM function switch is a position for external PULSE modulation In this mode pulse inputs with repetition rates to 500 kHz ...

Page 25: ...ccuracy of this meter is usually better than 3 of reading Pushbuttons select the meter function and scale lights indicate the range on which the meter reading should be made For RF output level and AM the scales autorange for better resolution For FM the appropriate scale is selected by the PEAK DEVIATION range switch 1 49 Also provided are three front panel annunciators that indicate when certain...

Page 26: ...B output step attenuator These features allow the generator to be used to test VOR ILS and VHF communications receivers 1 62 ACCESSORIES SUPPLIED 1 63 The Model 8640B is supplied with the following accessories they are shown in Figure 1 1 Line Power Cable HP 8120 1378 2 Amp Fuse HP 2110 0002 1 Amp Fuse HP 2110 0001 1 64 The following accessories are mounted inside the instrument s chassis and are ...

Page 27: ...red to check adjust and repair the Model 8640B If substitute equipment is used it must meet the listed critical specifications NOTE The safety classification of this instrument is Safety Class I It has been designed and tested according to IEC Publication 348 Safety Requirements for Electronic Measuring Apparatus The instruction manual contains information warnings and cautions which must be follo...

Page 28: ...XT Internal Reference Error 2 ppm when calibrated at 25 C every 3 months and oper ated between 15 C and 35 C Fine Tuning Unlocked 200 ppm total range Locked mode 20 ppm by varying internal time base vernier Stability Normal Locked 3 Time after 2 hour 10 ppm 10min 0 05 ppm hr warm up 2 ppm total 4 Temperature 50 ppm C room ambient 15 to 350C Line Voltage 5 5 to 10 line 1 ppm 0 1 ppm voltage change ...

Page 29: ...res 1 2 and 1 3 0 5 to 512 MHz 140 dB Residual AM Averaged rms Post detection Noise Bandwidth 300 Hz to 3 kHz 20 Hz to 15 kHz 85 dB down 78 dB down Residual FM Averaged rms CW and up to Up to maxi 1 8 maximum mum allowable allowable peak peak deviation deviation Post detection 300 Hz 20 Hz 300 Hz 20 Hz Noise to to to to Bandwidth 3 kHz 15 kHz 3 kHz 15 kHz 230 to 550 MHz 5 Hz 15 Hz 15 Hz 30 Hz Note...

Page 30: ...alibrated out with a power meter at a fixed frequency and a fixed vernier setting MODULATION CHARACTERISTICS General Types Internal AM and FM External AM FM and PULSE Simultaneous AM and FM or PULSE and FM Internal Modulation Sources independently adjustable output is available at front panel Standard Frequency Fixed 400 Hz and 1 kHz 2 Output Level Indicated 10 mV to 1 Vrms into 600Ω Optional Inte...

Page 31: ...m for level accuracy within 10 µ s 5 µ s 2 µ s 1 dB of CW 0 1 duty cycle Pulse ON OFF ratio at maxi 40 dB mum vernier Peak Input Required Nominally 0 5V 5V max waveform return to zero into 50Ω Schmitt trigger Frequency Modulation Deviation Maximum allowable deviation equals 1 of lowest frequency in each band as below Frequency Band Maximum Peak MHz Deviation kHz 0 5 1 5 1 2 10 2 4 20 4 8 40 8 16 8...

Page 32: ...V maximum into 1000Ω Internal Reference Characteristics after 2 hr warm up Accuracy after calibration at 25 C Better than 1 ppm for 15 to 35 C Better than 3 ppm for 0 to 55 C Drift Rate Time 0 05 ppm per hr 2 ppm per year Temperature 2 ppm total variation for room ambient 15 to 35 C Line Voltage 0 1 ppm Frequency Tuning 20 ppm using internal time base vernier Rear Output nominally 0 5 Vp p into 50...

Page 33: ...red to input Output 1 Vrms into 5012 40 dB Amplifier Range 20 Hz to 100 kHz HP 08640 60506 P Gain 40 1 dB Input Impedance 50Ω Noise Figure 3 dB when driven from 50Ω Output Level 100 mV in 50Ω One Inch Loop Antenna To ensure measurement accuracy no HP 08640 60501 P substitution is possible Fabrication depends upon machining and assem bling to very close tolerances 10 dB Step Attenuator Attenuation ...

Page 34: ...uracy 0 01 of reading HP 3480B P A T 0 02 of range 3484A with AC True RMS Accuracy 0 1 Options 042 of reading 043 Ohms Range to 1 kΩ Digital to Analog Accuracy 1 of full scale HP 581A P Converter Input Code 1248 with 1 on state Option 002 positive compatible with Fred quency Counter Output Compatible with Strip Chart Recorder Directional Coupler Range 100 550 MHz HP 778D P Coupling Attenuation 20 ...

Page 35: ...EL P A Filter Impedance 50Ω FLT 21B VSWR 1 5 1 1500K 3 50 Ripple 0 2 dB 3A 3B 15 kHz Low Pass 15 kHz low pass 7 pole CIR Q TEL P Filter Impedance 50Ω FLT 21B 15K Ripple 0 2 dB 7 50 3A 3B 3 kHz Low Pass 3 kHz low pass 5 pole CIR Q TEL P Filter Impedance 50Ω FLT 21B 3K Ripple 0 2 dB 5 50 3A 3B Frequency Counter Range to 550 MHz HP 5327C P A T Input Sensitivity 100 mV Inputs 50Ω and high impedance 1 ...

Page 36: ...Time HP 180A 1801A P A T Sensitivity 5 mV division 1820C Internal External Sweep and Triggering Power Meter Range 0 45 550 MHz HP 432A P A T Input 20 to 10 dBm Accuracy 1 With Thermistor VSWR 1 3 1 With HP 478A Mount Option H63 Power Meter Range 10 550 MHz HP 435A P A Input Level 10 to 20 dBm Accuracy 1 of reading With Power Sensor VSWR 1 18 1 With HP 8481A Thermocouple Pulse Generator Range 50 Hz...

Page 37: ... down Residual FM 15 Hz rms in 20 Hz to 15 kHz post detection noise bandwidth 5 Hz rms in 0 3 3 kHz post detection noise bandwidth Aux RF Out 5 dBm Leakage 3 µ V induced in a 2 turn 1 inch diameter loop 1 inch away from any surface and measured into a 50n receiver FM dc coupled at least 40 kHz deviation for 1V input Audio Spectrum Range 20 200 kHz HP 141T P Analyzer Amplitude Calibration 8552B 855...

Page 38: ...s Responses 60 dB down for inputs of 40 dBm or less Span Width 0 1 GHz Compatible with Tracking Generator Spectrum Analyzer Range 0 45 100 MHz HP 141T P A IF Bandwidths down to 10 Hz 8552B 8553B All other specifications are the same as the HP 141T 8552B 8554B listed above except Span Width which should be 0 100 MHz should be compatible with Tracking Generator Recorder Strip Compatible with Digital...

Page 39: ...Impedance 600Ω Phase Variability 0 to 360 Distortion 64 dB down Variable Voltage Range 5 to 10 of nominal GR W5MT3A P Transformer line voltage 100 120 220 or 240 volts For 120V range is 105 130 Vrms Metered Accuracy 1 Vrms Vector Voltmeter Range 1 550 MHz HP 8405A P Sensitivity 20µ V Phase Range 18 full scale down to 6 full scale Phase Resolution 0 1 Phase Accuracy 1 5 Voltage Ratio Accuracy 0 2 d...

Page 40: ... Coaxial HP 10503A Test Cable SMC Male and BNC Male connectors HP 11592 60001 50 Ohm Load Male BNC Coaxial HP 11593A Coaxial Short Male Type N HP 11512A Tee Coaxial BNC one Male and two Female connectors HP 1250 0781 Voltage Probe 1 1 HP 10025A Extender Board 20 pins HP 5060 0256 Bumpers 2 for Extender Board HP 0403 0115 5 µF Capacitor HP 0180 2211 100 µ F Capacitor HP 0180 0094 0 001 µ F Capacito...

Page 41: ...Model 8640B TM 9 4935 601 14 7 P Figure 1 7 520 1040 MHz Notch Filter Figure 1 8 FM Linearity Circuit 1 21 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 42: ...Model 8640B TM 9 4935 601 14 7 P Figure 1 9 Noise Phase Lock Circuit 1 22 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 43: ... 1 and procedures for checking electrical performance are given in Section IV If the contents are incomplete if there is mechanical damage or defect or if the instrument does not pass the electrical performance test notify the nearest Hewlett Packard office If the shipping container is damaged or the cushioning material shows signs of stress notify the carrier as well as the Hewlett Packard office...

Page 44: ...the top left side see Figure 2 1 Firmly push the voltage selector card back into its slot Rotate the FUSE PULL handle to the right install a fuse of the correct rating and slide the fuse compartment cover to the right A complete set of fuses is supplied with the instrument see ACCESSORIES SUPPLIED in Section I NOTE The correct fuse rating for the line voltage selected in listed on the line power m...

Page 45: ...ller strips in rack mounting are adequate for the top and bottom cabinet surfaces 2 18 Bench Operation 2 19 The instrument cabinet has plastic feet and a foldaway tilt stand for convenience in bench operation The tilt stand raises the front of the instrument for easier viewing of the control panel and the plastic feet are shaped to make full width modular instruments self aligning when stacked 2 2...

Page 46: ...r around all sides of the instrument to provide a firm cushion and prevent movement inside the container Protect the control panel with cardboard d Seal the shipping container securely e Mark the shipping container FRAGILE to assure careful handling Figure 2 3 Preparation for Rack Mounting 2 4 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 47: ...line power cable from its jack Slide the fuse compartment cover to the left then pull the handle marked FUSE PULL and remove the fuse CAUTION Be sure to select the correct fuse rating for the selected line voltage see LINE VOLTAGE SELECTION in Section II fuse ratings are listed on the fuse compartment 3 11 Fan The cooling fan s filter is located on the rear panel To service the fulter use a No 2 P...

Page 48: ...ndicates that deviation is 72 kHz LEVEL VOLTS 0 3 and 0 10 scales are read in microvolts millivolts or volts depending upon setting of OUTPUT LEVEL controls e g with OUTPUT LEVEL set to approximately 20 mVOLTS a meter reading of 2 4 indicates that actual level is 24 mVrms The 10 to 3 dB scale is read relative to the OUTPUT LEVEL switch dBm scale 4 Output Problem Annunciators lamps light to indicat...

Page 49: ...es to tune over the full range When control is not in CAL position the UNCAL lamp lights to indicate that the counter is uncalibrated 8 RF ON OFF enables or disables the RF output 9 RF OUTPUT RF output through Type N female connector Connector meets US MIL C 39012 50 ohm ac coupled source impedance CAUTION Any interruption of the protective grounding conductor inside or outside the instrument is l...

Page 50: ...henever FM selector is set to INT 600 ohm source impedance level controlled by AUDIO OUTPUT LEVEL 18 MODULATION FREQUENCY switch selects 400 Hz or 1000 Hz With Option 001 Variable Modulation Oscillator shown switch also selects multiplier Vernier with multiplier sets frequency from 20 Hz to 600 kHz 19 AM INPUT OUTPUT 600 ohm input for external AM 1 Vpk 0 7071 Vrms required for 100 modulation never...

Page 51: ...M INT AM by internal oscillator AC AM by external source through AM INPUT jack 20 Hz ac dc 5 Vpk DC AM by external source through AM INPUT jack ac dc 5 Vpk PULSE when selected with no modulation it disables the RF output a positive pulse at AM INPUT pulses on the RF 24 Mechanical Meter Zero sets meter suspension so that meter indicates zero when power is removed from instrument and instrument is i...

Page 52: ... MHz time base the Model 8640B can be phase locked to an external reference such as another Model 8640B by using the TIME BASE Reference jack and switch 4 Line Power Module permits operation from 100 120 220 or 240 Vac The number visible in window indicates nominal line voltage to which instrument must be connected see Figure 2 1 Center conductor is safety earth ground WARNING Any interruption of ...

Page 53: ... SOURCE INT In 7 TIME BASE VERNIER CAL 23 AM OFF 21 AUDIO OUTPUT LEVEL ccw 20 MODULATION ccw 18 MODULATION FREQUENCY 400 Hz 15 FM OFF 16 PEAK DEVIATION 5 kHz 16 PEAK DEVIATION Vernier ccw 13 RANGE 0 5 1 MHz 12 FREQUENCY TUNE Centered Four turns from stop 11 FINE TUNE Centered 10 OUTPUT LEVEL 100 mVOLTS 8 RF ON OFF ON Figure 3 4 Operator s Checks 1 of 5 3 7 Artisan Technology Group Quality Instrume...

Page 54: ...e reading should shift one place to the left Set COUNTER MODE EXPAND to X100 FREQUENCY should read about 500000 MHz the reading should shift one additional place to the left with the decimal point and the seven no longer displayed the OVERFLOW annunciator lamp should light e Set COUNTER MODE EXPAND 5 to OFF buttons out With RANGE 13 set as follows FREQUENCY 6 should read approximately as shown Fig...

Page 55: ... reading should change the reading should follow FREQUENCY TUNE RF Output g Set COUNTER MODE LOCK 5 to OFF and Source 5 to EXT 0 550 Adjust FREQUENCY TUNE 12 until FREQUENCY 6 reads 0384 00 MHz Step through the ranges as specified in step e setting the COUNTER MODE EXPAND and Source EXT controls 5 to obtain appropriate resolution FREQUENCY should read approximately as shown in step e NOTE With RAN...

Page 56: ...ly 3 on the 0 3 SCALE Amplitude Modulation k Set Meter Function 1 to AM and AM 23 to INT Slowly turn Modulation 20 clockwise When the meter indicates 10 i e 100 modulation set OUTPUT LEVEL 10 to 16 dBm the REDUCE PEAK POWER annunciator 4 should light Frequency Modulation 1 Set AM 23 to OFF the annunciator should go out and FM 15 to INT Set Meter Function 1 to FM and check that PEAK DEVIATION 16 is...

Page 57: ...ld indicate 0 o Set RANGE 13 to 1 2 MHz the annunciator should go out and turn the PEAK DEVIATION vernier 16 full counterclockwise the meter 3 should indicate 0 on the 0 10 SCALE Modulation Oscillator p Using the BNC to BNC cable connect FM OUTPUT 17 to COUNTER INPUT 14 Set COUNTER MODE EXPAND 5 to X100 and Source 5 to EXT 0 10 Set AUDIO OUTPUT LEVEL 21 to 1 V and MODULATION FREQUENCY 18 in turn t...

Page 58: ...NCY display 6 is automatically set by the RANGE control 13 For more resolution set COUNTER MODE EXPAND 5 to X10 or X100 e To phase lock the generator s output set COUNTER MODE LOCK 5 to ON use TIME BASE VERNIER 7 as the fine frequency tune On some frequency bands it will be necessary to use the COUNTER MODE EXPAND controls to tune between adjacent counts Figure 3 5 Setting the Frequency and Amplit...

Page 59: ...dicate the frequency out of doubler i e the FREQUENCY display indicates twice the frequency at RF Output Amplitude a Use the OUTPUT LEVEL switch and vernier 11 to set the desired signal level there are two scales rms volts and dBm For optimum operation use the vernier in the top 10 dB of its range To enable the RF signal set the RF ON OFF switch 8 to ON NOTE The RF ON OFF switch may be wired to tu...

Page 60: ... 1 indicates that the actual level is 21 mVrms c If a 50 ohm to 75 ohm adapter consisting of a 25 ohm series resistor is connected to RF OUTPUT 9 the OUTPUT LEVEL 10 voltage scale will be correct if the instrument is used with 75 ohm terminations However 1 76 dB must be subtracted from the dB scale for correct readings Figure 3 5 Setting the Frequency and Amplitude Controls 3 of 3 3 14 Artisan Tec...

Page 61: ...ng of 5 4 indicates that the AM is 54 NOTE The REDUCE PEAK POWER annunciator 4 lights whenever the Signal Generator s output amplifier is being overdriven When it lights reduce MODULATION vernier or OUTPUT LEVEL vernier c With AM 23 set to INT the internal modulation oscillator signal is present at the AM OUTPUT jack 19 600 ohm source impedance Its level is set by AUDIO OUTPUT LEVEL 21 Figure 3 6 ...

Page 62: ...M is set to DC only if no dc offset is applied to the AM INPUT jack The meter responds to the positive peak of the ac component of the modulating signal Pulse Modulation a Set Meter Function 1 to LEVEL b Set AM 23 to PULSE this disables the RF output Apply the modulation pulse 0 5V to the AM INPUT jack 19 50 ohm load impedance The Signal Generator requires a positive level to produce an RF output ...

Page 63: ...k 17 600 ohm source impedance Its level is set by AUDIO OUTPUT LEVEL 21 e To use an external modulation signal set FM 15 to AC or DC if modulation signal is less than 20 Hz Apply the signal to the FM INPUT jack 17 600 ohm load impedance The Signal Generator requires 1 Vpk 0 7071 Vrms for full peak deviation The PEAK DEVIATION controls 16 and the meter 3 are used the same as when using the internal...

Page 64: ...er display to flash Also do not use FM CAL after locking Simultaneous AM and FM a Simultaneous AM and FM or pulse modulation and FM can be accomplished using the procedures described above The internal modulation oscillator can be used for either one or both AM and FM NOTE On Signal Generators with the Option 001 Variable Modulation Oscillator don t load both AM OUTPUT 19 and FM OUTPUT 17 when the...

Page 65: ...t that control so that the analyzer operates correctly 4 9 It is also assumed that the person performing the tests will supply whatever cables connectors and adapters are necessary The Test Accessories table in Section I lists the requirements for some of these items 4 10 Unless otherwise specified set the following controls as shown TIME BASE INT EXT on rear panel INT TIME BASE VERNIER CAL Use FI...

Page 66: ...50 ternal Doubler DESCRIPTION The frequency range is verified by using a frequency counter to measure the frequency at the high and low end of each band EQUIPMENT Frequency Counter HP 5327C PROCEDURE 1 Connect generator s auxiliary RF output jack located on rear panel to frequency counter s 50 ohm input after setting Signal Generator s controls as follows COUNTER MODE EXPAND Off LOCK Off Source IN...

Page 67: ... 16 _______________ 7 200 MHz 17 10 MHz ______________ 4 8 _______________ 3 600 MHz 8 500 MHz ______________ 2 4 _______________ 1 800 MHz 4 200 MHz ______________ 1 2 _______________ 0 900 MHz 2 100 MHz ______________ 0 5 1 _______________ 0 450 MHz 1 070 MHz ______________ No external doubler should be connected 4 12 FREQUENCY ACCURACY AND FINE TUNE TEST SPECIFICATION Accuracy Total Counter Ref...

Page 68: ...et frequency counter time base to give at least one more digit resolution than the generator s counter The difference in reading between the two counters should be 110 Hz 2 ppm last digit uncertainty of 10 Hz __________________________ 110 Hz 4 Set COUNTER MODE EXPAND to X10 and LOCK to ON Allow one minute to acquire phase lock Increase the frequency counter resolution by 10 The difference in coun...

Page 69: ...ppm 10 min normal mode Restabilization Time normal mode After frequency change 15 min After band change none After 1 min in RF OFF mode 10 min NOTE Stability specifications for phase lock mode are determined by counter time base reference See the internal reference tests DESCRIPTION A frequency counter digital to analog converter and strip chart recorder are used to measure the frequency drift aft...

Page 70: ...z full scale 4 Warm up the equipment for two hours Establish a reference on the recorder and record the generator s output frequency for 10 minutes The frequency change in 10 minutes should be 500 Hz half of full scale __________________________ 500 Hz 5 Set the FREQUENCY TUNE control fully ccw and back again to approximately 50 MHz After 15 minutes record the frequency for 10 minutes The frequenc...

Page 71: ... to vary the temperature Figure 4 2 Frequency stability Us Temperature Test Setup EQUIPMENT Frequency Counter HP 5327C Temperature Controlled Chamber Statham Model 325 PROCEDURE 1 Connect equipment as shown in Figure 4 2 after setting Signal Generator s controls as follows COUNTER MODE EXPAND Off LOCK Off Source INT AM OFF FM OFF RANGE 32 64 MHz FREQUENCY TUNE 50 MHz RF ON OFF ON 2 Set temperature...

Page 72: ...FICATION Stability vs Line Voltage 5 to 10 line voltage change 1 ppm normal mode NOTE Stability specifications for phase lock mode are determined by counter time base reference See the internal reference tests DESCRIPTION A frequency counter is used to measure frequency shift as line voltage is changed 5 to 10 Figure 4 3 Frequency Stability us Line Voltage Test Setup EQUIPMENT Frequency Counter HP...

Page 73: ...ng noted in step 2 should be 50 Hz i e 1 ppm ___________________________ 50 Hz 4 16 FREQUENCY STABILITY VS LOAD LEVEL AND MODE TEST SPECIFICATION Stability vs Load with any passive load change 1 ppm normal mode Stability vs Level Change 10 dB on OUTPUT LEVEL vernier 1 ppm normal mode Stability vs Modulation Mode Change CW to FM 1 of selected peak deviation or 200 Hz whichever is greater NOTE Stabi...

Page 74: ... RF OUTPUT Again note frequency counter reading It should have changed less than 50 Hz ___________________________ 50 Hz 3 Remove coaxial short note frequency counter reading then set OUTPUT LEVEL vernier to 9 dBm Again note frequency counter reading It should have changed less than 50 Hz ___________________________ 50 Hz 4 Set RANGE to 256 512 MHz and set FREQUENCY TUNE to 500 MHz With FM switch ...

Page 75: ...8 MHz _________________________ 12 8 kHz 2 56 MHz _________________________ 25 6 kHz 4 17 HARMONICS TEST SPECIFICATIONS Harmonics at 1 volt 13 dBm output range and below 35 dB below fundamental of 0 5 to 128 MHz 30 dB below fundamental of 128 to 512 MHz DESCRIPTION A spectrum analyzer is used to measure harmonics as the Signal Generator is tuned from 0 5 to 512 MHz EQUIPMENT Spectrum Analyzer HP 1...

Page 76: ...B ___________________________ NOTE If any harmonic below 512 MHz appears to be out of specification remove any possible analyzer error and remeasure the harmonic as follows a Tune the generator to the frequency of the harmonic b Using the analyzer s IF attenuator step the signal down 30 dB on the display and note the 30 dB point on the display c Step the IF attenuator up 30 dB and retune the gener...

Page 77: ...Hz 20 MHz 16 32 MHz 35 dB____________ 300 kHz 50 MHz 32 64 MHz 35 dB____________ 300 kHz 100 MHz 64 128 MHz 35 dB____________ 300 kHz 100 MHz 128 256 MHz 30 dB____________ 300 kHz 100 MHz 256 512 MHz 30 dB____________ 4 18 SUB HARMONICS AND NON HARMONIC SPURIOUS TEST SPECIFICATION Sub Harmonics and Non Harmonic Spurious excluding frequencies within 15 kHz of carrier whose effects are specified und...

Page 78: ...set resolution bandwidth to 30 kHz frequency span per division scan width to 1 MHz and tune the frequency controls to set 260 MHz at the center of the display Adjust reference level vernier to set signal peak to top reference graticule line on display 3 Set generator s RANGE switch to 256 512 MHz Tune analyzer to display the 520 MHz signal i e the second harmonic of 260 MHz 4 Tune generator s FREQ...

Page 79: ...Phase noise is measured with a spectrum analyzer A reference signal generator and a mixer are used to down convert the test Signal Generator s CW signal to 0 Hz the two signal generators are phase locked together Then the spectrum analyzer measures SSB phase noise at a 20 kHz offset from the carrier NOTE This test measures the total SSB phase noise of both generators Therefore the reference signal...

Page 80: ...ency controls to 20 kHz Set display reference level to 40 dBm at 10 dB per division Using analyzer s 20 kHz markers measure and note 20 kHz on the display 3 Set oscilloscope s volts div control to 0 02 and time div control to 50 its set the input to measure dc Set 10 dB step attenuator to 80 dB Set 40 dB amplifier s input impedance switch to 50 ohms 4 Set reference signal generator for a 549 98 MH...

Page 81: ... be 12 dB below top graticule line at 20 kHz i e 122 dB below carrier 12 dB ___________________________ NOTE Set oscilloscope to check for possible line related signals in test setup They should be 10 mVp p 7 Set test Signal Generator to 450 MHz and FM switch to OFF Set reference signal generator to 449 98 MHz i e 20 kHz below the test generator s frequency Repeat steps 2 through 6 The average noi...

Page 82: ...d the broadband noise floor is measured Figure 4 7 Single Sideband Broadband Noise Floor Test Setup EQUIPMENT Reference Signal Generator HP 8640A Mixer HP 10514A 15 kHz Low Pass Filter CIR Q TEL 7 Pole 10 dB Step Attenuator HP 355D 40 dB Amplifier HP 08640 60506 Spectrum Analyzer HP 141T 8552B 8556A PROCEDURE 1 Connect equipment as shown in Figure 4 7 after setting test Signal Generator s controls...

Page 83: ...alyzer giving 2 times the effective noise voltage b 2 5 dB because noise is average detected after logging c 0 8 dB Effective noise BW is 1 2 x 3 dB BW which gives 0 8 dB 10 log actual 3 dB BW nominal 3 dB BW Summing the correction factors gives 1 3 dB 10 log actual 3 dB BW nominal 3 dB BW or approximately 1 3 dB 1 dB 4 Change reference signal generator s output frequency to 500 50 MHz Set 10 dB s...

Page 84: ...ctly from the voltmeter Figure 4 8 Residual AM Test Setup EQUIPMENT RMS Voltmeter HP 3400A Detector HP 8471A 3 kHz Low Pass Filter LPF CIR Q TEL 5 Pole 15 kHz Low Pass Filter LPF CIR Q TEL 7 Pole 40 dB Amplifier HP 465A Capacitor 5 µ F HP 0180 2211 50 Ohm Load HP 11593A PROCEDURE 1 Connect equipment as shown in Figure 4 8 with the generator connected to the rms voltmeter through the detector ampli...

Page 85: ... e 78 dB down The 10 AM after detection is 20 dB below the carrier level Residual AM is then 20 dB 78 dB 58 dB 58 dB ___________________________ 4 Replace the 15 kHz LPF with the 3 kHz LPF Add the capacitor between amplifier and filter and repeat steps 1 through 3 The residual AM should read 65 dB below the reference noted in step 2 i e 85 dB down 65 dB ___________________________ 4 22 RESIDUAL FM...

Page 86: ...deviation of the residual FM NOTE This test measures the total residual FM of both generators Therefore the reference generator must have residual FM that is less than or equal to the specification for the test generator Figure 4 9 Residual FM Test Setup EQUIPMENT FM Discriminator HP 5210A Filter Kit HP 10531A RMS Voltmeter HP 3400A 40 dB Amplifier HP 465A Capacitor 5 pF HP 0180 2211 Reference Sig...

Page 87: ...rms Fine tune either generator for a full scale meter reading on the discriminator 5 Connect amplifier to discriminator output Connect the voltmeter through the 15 kHz LPF to amplifier s output The signal out of the amplifier is 0 5 mVrms per 1 Hz rms of residual FM deviation and the average voltmeter reading should be less than 7 5 mVrms i e 15 Hz rms residual FM 7 5 mVrms NOTE Test setup calibra...

Page 88: ...UTPUT LEVEL switch and the spectrum analyzer s vertical scale log reference level control are stepped together and any amplitude variations are measured on the analyzer s display An RF attenuator and amplifier at the RF OUTPUT are adjusted for analyzer compatibility and best sensitivity This procedure uses an IF substitution technique in which the spectrum analyzer s IF is the standard The IF step...

Page 89: ...Model 432A Power Meter with a Model 478A Thermistor Mount can be used for this test However a 10 dB attenuator such as the Model 8491A OPT 10 must be used with the mount This will slightly degrade measurement accuracy PROCEDURE 1 Connect equipment as shown in Figure 4 10 after setting Signal Generator s controls as follows Meter Function LEVEL COUNTER MODE EXPAND Off LOCK Off Source INT AM OFF FM ...

Page 90: ... spectrum analyzer center frequency to 512 MHz resolution bandwidth to 1 kHz frequency span per division scan width to 0 5 kHz input attenuation to 0 dB tuning stabilizer on display smoothing video filter to 100 Hz 2 dB per division vertical log display with a 20 dBm reference level 5 Connect attenuator to generator s RF OUTPUT without disturbing generator s controls Center signal on analyzer s di...

Page 91: ...0 dB With the vertical scale log reference vernier set the signal peak to the same level with respect to the horizontal center reference graticule line as the last measurement recorded on the preceeding table NOTE If generator appears to be out of specification check accuracy of spectrum analyzer s vertical scale calibration 8 Step Signal Generator s OUTPUT LEVEL switch and analyzer s vertical sca...

Page 92: ...30 2 5 2 5 12 steps ccw 97 dBm 40 2 5 2 5 13 steps ccw 107 dBm 50 2 5 2 5 14 steps ccw 117 dBm 60 2 5 2 5 11 Set analyzer s display to 10 dB division log Adjust log reference level vernier to set signal to 10 dB graticule line one major division from top of display plus last recorded entry on previous table NOTE If the following step appears to be out of specification check the accuracy of the ana...

Page 93: ...tenuator and the test generator s OUTPUT LEVEL switch are stepped together Any amplitude variations are measured with a DVM connected to the analyzer s vertical output A spectrum analyzer tracking generator is connected with the two signal generators in a phase lock loop that prevents relative drift between the units NOTE This procedure allows the output level accuracy to be verified down to 145 d...

Page 94: ...or HP 8481A Double Shielded Cable 17 required HP 08708 6033 Noise Filter SPST Switch HP 3101 0163 100 k2 Resistor HP 0757 0465 100 MF Capacitor HP 0180 0094 NOTE An HP Model 432A Power Meter with a Model 478A Thermistor Mount can be used for this test However a 10 dB attenuator such as the Model 8491A OPT 10 must be used with the mount This will slightly degrade measurement accuracy 4 30 Artisan T...

Page 95: ...PUT oj _ lsrEP I STEP 21 POWER SENSOR 4 MHZ LPF CALl BRATED SHP ATTENUATOR IF ATTENUATOR TRACK NG GENERATOR INPUT VERT OUTPUT POWER METER NOISE FILTER 5PECTRUM ANALYZER 0 DOUBL SHIELDED CABLE MIXER r F F2 J_M_H_ _ R L 1 27 dBm REFERENCE SIGNAL AUX RF OUTPUT GENERATOR DIGITAL VOLT METER L5MHz LPF AF OUTPUT TEE Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg c...

Page 96: ...Bm Connect power sensor to test Signal Generator s RF OUTPUT 3 Set test Signal Generator s RF OUTPUT LEVEL controls for levels set using generator s panel meter shown in the table below verify that the level is within the specified tolerance Signal Generator Power Meter Reading OUTPUT LEVEL RF Level Set dBm Switch with Panel Meter Full cw 19 dBm 17 5 20 5 13 dBm 11 5 14 5 5 dBm 3 0 7 0 1 step ccw ...

Page 97: ...the DVM can be used instead of or with the DVM s noise filter whenever the DVM s reading is obscured by noise To use this filter switch it off if it is on for approximately two seconds to allow the capacitor to charge then switch it on wait approximately 30 seconds to allow the filter to reach the average value of the signal then take the reading 10 Phase lock the system by tuning the reference si...

Page 98: ...3 dB IF Attenuator Test Generator DVM Readings dB OUTPUT LEVEL mVdc 50 47 dBm Set level 40 57 dBm 445 6 561 0 13 Set the IF attenuator to 30 dB OUTPUT LEVEL to 67 dBm and then adjust the OUTPUT LEVEL vernier so that the test Signal Generator s panel meter reads 67 dBm then continue The DVM should read 500 mVdc 1 dB IF Attenuator Test Generator DVM Readings dB OUTPUT LEVEL mVdc 30 67 dBm 445 6 561 ...

Page 99: ...hen continue The DVM should read 500 mVdc 1 dB If necessary use test generator s OUTPUT LEVEL vernier to reset panel meter to 3 dB IF Attenuator Test Generator DVM Readings dB OUTPUT LEVEL mVdc 20 127 dBm Set level 10 137 dBm 445 6 561 0 17 Set the IF attenuator to 0 dB and adjust the OUTPUT LEVEL vernier so that test Signal Generator s panel meter reads 0 013 pV 144 75 dBm The DVM should read 650...

Page 100: ...T Power Meter HP 432A Thermistor Mount HP 478A OPT H63 10 dB Attenuator HP 8491A OPT 10 NOTE The mount s VSWR should be 1 1 1 max The attenuator s VSWR should be 1 06 1 max with flatness 0 05 dB from 0 5 to 512 MHz PROCEDURE 1 Connect equipment as shown in Figure 4 12 after setting Signal Generator s controls as follows Meter Function LEVEL COUNTER MODE EXPAND Off LOCK Off Source INT AM OFF FM OFF...

Page 101: ...nges 1 3 on all other ranges DESCRIPTION The generator s output signal is reflected back into the RF OUTPUT jack by a coaxial short at the end of an adjustable stub a variable length of air line This reflected signal is re reflected by any mismatch at the jack The re reflected signal combines with the output signal according to the relative phase and magnitude of the two signals The combined signa...

Page 102: ... D50L Vector Voltmeter HP 8405A 509Ω Tee HP 11536A 502Ω Termination HP 908A PROCEDURE 1 Connect equipment as shown in Figure 4 13 after setting Signal Generator s controls as follows Meter Function LEVEL COUNTER MODE EXPAND Off LOCK Off Source INT AM OFF FM OFF RANGE 256 512 MHz FREQUENCY TUNE 512 MHz OUTPUT LEVEL 10 dBm Switch 1 step ccw from full cw RF ON OFF ON 4 38 Artisan Technology Group Qua...

Page 103: ...t can measure 10 mV Adjust the stub for a minimum indication on voltmeter Adjust generator s OUTPUT LEVEL vernier for a 5 mV indication on voltmeter V min 7 Adjust the stub for a maximum indication on voltmeter The voltmeter should indicate 6 5 mV V max 8 If desired repeat at other frequencies between 256 and 512 MHz NOTE The steps given above effectively check VSWR at all settings of the output a...

Page 104: ...50 MHz 300 kHz resolution bandwidth and 20 dB input attenuation Set tracking generator output level to 0 dBm 3 To establish a reference level connect coaxial short to bridge output port Use the spectrum analyzer s vertical scale logrithmic level controls to set the reference level trace to the top of the analyzer display 4 Remove coaxial short and couple bridge output port to Signal Generator s RF...

Page 105: ...______________ 4 28 AUXILIARY OUTPUT TEST SPECIFICATION Auxiliary Output Rear panel BNC output is 5 dBm into 50Ω source impedance is approximately 500Ω DESCRIPTION The power level from the generator s rear panel Auxiliary RF Output jack is measured with a power meter as the Signal Generator is tuned from 512 MHz to 500 kHz EQUIPMENT Power Meter HP 432A Thermistor Mount HP 478A OPT H63 PROCEDURE 1 ...

Page 106: ...rom any surface and measured into a 50Ω receiver DESCRIPTION A loop antenna is held one inch from all surfaces of the Signal Generator and any leakage monitored with a spectrum analyzer The loop antenna is suspended in a molding so that when the molding is in contact with a surface the loop antenna is one inch from the surface NOTE The use of a screen room may be necessary to reduce external radia...

Page 107: ...to the 37 dB graticule line on the display Disconnect generator from analyzer and connect 50 ohm terminations to generator s output ports including the Auxiliary RF Output on rear panel 3 Connect one inch loop antenna to analyzer through 0 5 400 MHz amplifier Hold end of loop antenna cylinder in contact with all surfaces of Signal Generator set analyzer s center frequency controls to 300 MHz and r...

Page 108: ...ixed 400 Hz and 1000 Hz 2 Output Level indicated 10 mVrms to 1 Vrms into 600 ohms Option 001 Frequency variable 20 Hz to 600 kHz 10 in 5 decade continuous bands plus fixed 400 Hz and 1000 Hz 2 Output Level 20 mVrms to 3 Vrms into 600 ohms DESCRIPTION The internal modulation oscillator output is measured with a voltmeter and a frequency counter to verify its frequency range and accuracy and its lev...

Page 109: ... 20 Hz and the voltmeter should read as specified above 980_____________1020 Hz Standard 1 0 Vrms____________ Option 001 3 0 Vrms___________ 4 If testing an Option 001 set AUDIO OUTPUT LEVEL to 3V and slowly tune MODULATION FREQUENCY through its variable range from 20 Hz to 600 kHz The MODULATION FREQUENCY controls should read within 10 of the frequency counter reading at all frequencies Frequency...

Page 110: ...LATION FREQUENCY As specified FM OFF 2 Set the MODULATION FREQUENCY controls to various frequencies within the variable ranges shown below At each frequency tested calibrate the distortion analyzer and measure the distortion It should be as shown Frequency Range Distortion 20 Hz to 2 kHz 0 5 2 kHz to 600 kHz 1 0 3 Set the MODULATION FREQUENCY controls to the 400 Hz and 1 kHz fixed frequencies Dist...

Page 111: ...is set to sweep over the specified audio frequency range and its tracking generator output is used to amplitude modulate the Signal Generator The generator s RF output is detected and fed to the analyzer s input Amplitude variation is measured on the analyzer s display Figure 4 18 AM 3 dB Bandwidth Test Setup EQUIPMENT Audio Spectrum Analyzer HP 141T 8552B 8556A Crystal Detector HP 8471A 1 kΩ Resi...

Page 112: ... to 100 kHz span Set display for 2 dB per division 4 Set analyzer s display reference level controls to display the detected sweep Slowly tune Signal Generator from 8 to 16 MHz while noting amplitude variations from 0 60 kHz on the display The variation should be 3 dB referenced to the level at 1 kHz ________3 dB 5 Set analyzer and Signal Generator as shown below At each RANGE switch setting repea...

Page 113: ...on analyzer is connected to the analyzer s vertical output and used to measure AM distortion Figure 4 19 AM Distortion Test Setup EQUIPMENT Spectrum Analyzer HP 141T 8552B 8554B Distortion Analyzer HP 333A PROCEDURE 1 Connect equipment as shown in Figure 4 19 after setting Signal Generator s controls as follows Meter Function AM COUNTER MODE EXPAND Off LOCK Off Source INT AM OFF MODULATION Full cc...

Page 114: ...nerator s panel meter 4 Calibrate the distortion analyzer for 1 kHz Measure and record distortion it should be less than 1 with trace peaked on analyzer display ________________1 5 Use generator s MODULATION control to set AM percent to 70 and 90 calibrate the distortion analyzer and measure distortion at each modulation depth Distortion should be less than 3 with trace peaked on analyzer display ...

Page 115: ...utput and the dc value of the carrier is set to 282 8 mVdc the rms value of the modulation is then a very accurate measure of AM percent AM is 1 2 the ac voltage in mVrms Figure 4 20 AM Sensitivity and Accuracy Test Setup EQUIPMENT Spectrum Analyzer HP 141T 8552B 8554B Digital Voltmeter HP 3480B 3484A Test Oscillator HP 652A Calibrated Step Attenuator HP 355D OPT H36 PROCEDURE 1 Connect equipment ...

Page 116: ...n to 0 Hz and display smoothing video filter to 10 kHz Peak the trace on the display with the center frequency controls set the trace to the center of the display with the reference controls NOTE Step 4 measures the analyzer s dc offset Voff and must be performed to ensure the accuracy of this test However if Voff for the analyzer being used has recently been measured and noted skip step 4 and go ...

Page 117: ... Accuracy 171 0 189 0 mVrms 7 To check indicated accuracy set test oscillator s amplitude controls for a reading of 9 90 AM on the 0 10 scale of generator s panel meter The DVM should read 180 mVrms 8 Check that trace is peaked on analyzer display 165 6 194 4 mVrms 8 Set the test oscillator s amplitude controls for the panel meter readings shown below The DVM should read as specified After each re...

Page 118: ...lifier with the phase of the same signal modulated at a 0 1 Hz rate at the RF OUTPUT port The signal is supplied by the generator s own oscillator and divider circuits and has low incidental PM Figure 4 21 Peak Incidental Phase Modulation Test Setup EQUIPMENT Function Generator HP 3300A Vector Voltmeter HP 8405A 50 Ohm Tee 2 required HP 11536A 50 Ohm Load HP 11593A Test Cable 2 required HP 11592 6...

Page 119: ...nstrument to line power source Allow one hour warm up time before continuing with this test NOTE See the last foldout sheet in this manual for component identification 2 Finish connecting equipment as shown in Figure 4 21 after setting Signal Generator s controls as follows Meter Function AM COUNTER MODE EXPAND Off LOCK Off Source INT AM DC FM OFF RANGE 256 512 MHz FREQUENCY TUNE 512 MHz OUTPUT LE...

Page 120: ...rm up time before continuing with this test 8 Check Signal Generator for correct RF output on each frequency range WARNING Capacitors inside the instrument may still be charged even if the instrument has been disconnected from its line power source 4 36 PULSE MODULATION TEST SPECIFICATION Pulse Modulation specifications apply for top 10 dB of output vernier range Frequency Bands MHz 0 5 1 1 2 2 8 ...

Page 121: ...oscilloscope is available such as the HP 183C 1830A 1840A the above measurement may be made directly to frequencies slightly beyond the oscilloscope s nominal bandwidth Use the oscilloscope s 5092 input Figure 4 22 Pulse Modulation Test Setup EQUIPMENT Reference Signal Generator HP 8640A Mixer HP 10514A 50 Ohm Load HP 11593A Pulse Generator HP 8003A Oscilloscope HP 180A 1801A 1820C Crystal Detecto...

Page 122: ...Hz FREQUENCY TUNE 1 MHz OUTPUT LEVEL 17 dBm Vernier full cw RF ON OFF ON 2 Set pulse generator for a repetition rate of 100 Hz a pulse width of 10 us and an amplitude of 1V 3 Adjust oscilloscope to display the RF pulse envelope Readjust the pulse width for 10 us measured at 50 amplitude points and measure the rise and fall times see Figure 4 23 Both should be less than 9 Ps measured between 10 and...

Page 123: ..._________ 6 7 div 16 32 MHz 500 Hz 2 µ s 1 µ s 1 µ s 5 4 _________ 6 7 div 7 Connect test generator to mixer and mixer to oscilloscope across 50 ohm load 8 Repeat steps 2 through 5 for the frequency ranges shown below At each frequency range set the pulse generator as specified and set the reference signal generator for an output frequency 10 MHz below the output frequency of the test generator Th...

Page 124: ...56 MHz OUTPUT LEVEL 7 dBm Vernier full cw RF ON OFF ON 2 Set spectrum analyzer s input attenuation to 20 dB Adjust center frequency controls to center the 256 MHz signal on the display Adjust scale reference level controls to set the signal to the top O dB graticule line with the scale controls set to display 10 dB per division 3 Set generator s AM switch to PULSE The signal on the analyzer s disp...

Page 125: ...modulated with an FM discriminator The demodulated signal is fed to the analyzer s input and any amplitude variation is measured on the analyzer s display Bandwidth is checked at maximum deviation on the 8 16 MHz band Figure 4 24 FM 3 dB Bandwidth Test Setup EQUIPMENT Audio Spectrum Analyzer HP 141T 8552B 8556A FM Discriminator HP 5210A Filter Kit For Discriminator HP 10531A PROCEDURE 1 Connect eq...

Page 126: ...reference level controls to display the demodulated sweep 4 Measure the sweep on the analyzer s display Total amplitude variation from 20 Hz to 250 kHz should be 3 dB ________3 dB NOTE If the FM discriminator s incidental AM rejection is insufficient the generator could appear to be out of specification To check the discriminator note analyzer s reading in dBm set generator s AM switch to AC and c...

Page 127: ...iscriminator HP 5210A Filter Kit For Discriminator HP 10531A Audio Spectrum Analyzer HP 141T 8552B 8556A PROCEDURE 1 Connect equipment as shown in Figure 4 25 after setting Signal Generator s controls as follows Meter Function FM COUNTER MODE EXPAND Off LOCK Off Source INT AM OFF MODULATION FREQUENCY 1 kHz Fixed FM INT PEAK DEVIATION 80 kHz PEAK DEVIATION Vernier Full cw RANGE 8 16 MHz FREQUENCY T...

Page 128: ... 8 For less than 1 distortion the 1 kHz signal s harmonics should be more than 40 dB below the reference graticule line 1 8 Maximum Deviation 40 dB 4 40 FM SENSITIVITY AND ACCURACY TEST SPECIFICATION External FM Sensitivity 1 volt peak yields maximum deviation indicated on PEAK DEVIATION switch with FM vernier at full cw position External FM Sensitivity Accuracy 6 from 15 to 35 C for FM excluding ...

Page 129: ...HP 141T 8552B 8553B Reference Signal Generator HP 8640A Mixer HP 10514A NOTE The reference signal generator should have frequency drift and residual FM specifications equivalent to the Model 8640A PROCEDURE 1 Connect equipment as shown in Figure 4 26 with test Signal Generator connected to mixer and mixer connected to analyzer after setting test generator s controls as follows Meter Function FM CO...

Page 130: ...h the frequency counter measure frequency of modulating signal It should be 2 079 kHz 6 i e 5 kHz 6 peak deviation 1 954 2 204 kHz 5 Use the procedures given above to check the remaining bands by setting the test Signal Generator s RANGE switch as shown below As shown in steps 1 through 4 on each range set FM to OFF and tune the generators for a 1 MHz difference Set the reference on the analyzer s...

Page 131: ...erence Set reference on analyzer set FM to AC with modulating signal s amplitude set for a test generator panel meter reading of 5 and its frequency set to approximately 2 079 kHz Then tune modulating signal s frequency for first carrier null The signal s frequency should be as shown RANGE FREQUENCY Reference Generator Mod Signal Frequency MHz TUNE Frequency kHz 128 256 256 MHz 257 MHz 1 871______...

Page 132: ...d and used to calibrate an oscilloscope The generator is then frequency modulated and any incidental AM is measured with the oscilloscope Figure 4 27 Incidental AM Test Setup EQUIPMENT Crystal Detector HP 423A 15 kHz Low Pass Filter LPF CIR Q TEL 7 Pole 40 dB Amplifier HP 465A Oscilloscope HP 180A 1801A 1820C 50 Ohm Load HP 11593A Nine Inch Cable HP 10502A Adapter HP 10110A 0 001 µ F Capacitor HP ...

Page 133: ...Function to FM and set PEAK DEVIATION vernier for 2 56 MHz Increase oscilloscope sensitivity by 10 Using generator s FREQUENCY TUNE control tune across the band and record the maximum incidental AM read on the oscilloscope It should be less than 1 8 divisions peak to peak on the display Maximum Deivation 1 5 Set PEAK DEVIATION switch to 320 kHz Again using the generator s FREQUENCY TUNE control tu...

Page 134: ...ange and sensitivity Figure 4 28 Counter External Sensitivity Test Setup EQUIPMENT Test Oscillator HP 652A PROCEDURE 1 Connect RF OUTPUT to COUNTER INPUT as shown in Figure 4 28 after setting Signal Generator s controls as follows Meter Function LEVEL COUNTER MODE EXPAND Off LOCK Off Source INT TIME BASE VERNIER CAL AM OFF FM OFF RANGE 256 512 MHz FREQUENCY TUNE 550 MHz OUTPUT LEVEL 100 VOLTS RF O...

Page 135: ... the test oscillator at all frequencies 20 Hz to 500 kHz v 4 Set COUNTER MODE Source to EXT 0 10 and slowly tune oscillator from 20 Hz to 10 MHz The counter should indicate the frequency of the signal from the test oscillator at all frequencies 20 Hz to 10 MHz v 4 43 INTERNAL REFERENCE ACCURACY TEST SPECIFICATION Accuracy after calibration at 25 C and 2 hour warm up Better than 1 ppm for 15 to 35 ...

Page 136: ...measure the frequency It should be 5 MHz 15 Hz 4 999 985 5 000 015 Hz 4 44 INTERNAL REFERENCE DRIFT RATE STABILITY TEST SPECIFICATION Drift Rate after 2 hour warm up Time 0 05 ppm per hr 2 ppm per yr Temperature 2 ppm total variation for room ambient 150 to 350C Line Voltage 0 1 ppm NOTE Because the phase lock mode references the generator s RF oscillator to the counter s frequency reference the f...

Page 137: ...e voltage change Figure 4 30 Internal Reference Drift Rate Stability Test Setup EQUIPMENT Frequency Counter HP 5327C OPT 003 Temperature Controlled Chamber Statham Model 325 Variable Voltage Transformer GR W5MT3A Coaxial Short Type N Male HP 11512A Quartz Oscillator HP 105B Digital to Analog Converter HP 581A OPT 002 Recorder for D A Converter HP 680 PROCEDURE 1 Connect equipment as shown in Figur...

Page 138: ...e to 100s because the reference being used is 1 MHz instead of the 10 MHz reference the counter normally uses This means that the counter s reading must be divided by 10 to find the actual frequency of the signal being measured i e the recorder s calibration is 0 00 to 9 99 Hz full scale 6 Record the generator s internal reference frequency for one hour The frequency change in one hour should be 0...

Page 139: ...y Except for the 1 digit count ambiguity it should not have changed Load No Change 12 Remove coaxial short Note internal reference frequency set OUTPUT LEVEL switch one step ccw to 9 dBm then again note reference frequency Except for the 1 digit count ambiguity it should not have changed Level Change No Change 13 Note internal reference frequency set FM switch to AC then again note reference frequ...

Page 140: ...corder for a zero to full scale reading that corresponds to a 00 to 99 Hz reading of the frequency counter s last two digits i e 100 Hz full scale 4 Set COUNTER MODE LOCK to ON wait one minute then record generator s output frequency for five minutes the frequency should not vary more than 7 Hz 0 1 ppm 1 digit counter ambiguity 7 Hz 5 Set COUNTER MODE LOCK to Off tune FREQUENCY TUNE control fully ...

Page 141: ...Hz ______ Low End of Band 512 1024 MHz 230 0 MHz 256 512 MHz ______ 230 0 MHz 128 256 MHz ______ 115 0 MHz 64 128 MHz ______ 57 50 MHz 32 64 MHz ______ 28 80 MHz 16 32 MHz ______ 14 40 MHz 8 16 MHz ______ 7 200 MHz 4 8 MHz ______ 3 600 MHz 2 4 MHz ______ 1 800 MHz 1 2 MHz ______ 0 900 MHz 0 5 1 MHz ______ 0 450 MHz 4 12 Frequency Accuracy and Fine Tune Test Counter Readings Difference 110 Hz X10 1...

Page 142: ...6 4 kHz 1 28 MHz ______ 12 8 kHz 2 56 MHz ______ 25 6 kHz 4 17 Harmonics Test Frequency Range 0 5 1 MHz 35 dB ______ 1 2 MHz 35 dB ______ 2 4 MHz 35 dB ______ 4 8 MHz 35 dB ______ 8 16 MHz 35 dB ______ 16 32 MHz 35 dB ______ 32 64 MHz 35 dB ______ 64 128 MHz 35 dB ______ 128 256 MHz 30 dB ______ 256 512 MHz 30 dB ______ 4 18 Sub Harmonics and Non Harmonic Spurious Test Below carrier 100 dB ______ ...

Page 143: ...__ 3 0 dBm 2 steps ccw 3 dBm 1 5 dBm ______ 4 5 dBm 3 steps ccw 7 dBm 8 5 dB ______ 5 5 dB 4 steps ccw 17 dBm 2 0 dB ______ 2 0 dB 5 steps ccw 27 dBm 2 0 dB ______ 2 0 dB 6 steps ccw 37 dBm 2 0 dB ______ 2 0 dB 7 steps ccw 47 dBm 2 5 dB ______ 2 5 dB 8 steps ccw 57 dBm 2 5 dB ______ 2 5 dB 9 steps ccw 67 dBm 2 5 dB ______ 2 5 dB 10 steps ccw 77 dBm 2 5 dB ______ 2 5 dB 11 steps ccw 87 dBm 2 5 dB _...

Page 144: ...Vdc ______ 529 6 mVdc 57 dBm 445 6 mVdc ______ 561 0 mVdc 67 dBm 445 6 mVdc ______ 561 0 mVdc 77 dBm 445 6 mVdc ______ 561 0 mVdc 87 dBm 445 6 mVdc ______ 561 0 mVdc 107 dBm 445 6 mVdc ______ 561 0 mVdc 117 dBm 445 6 mVdc ______ 561 0 mVdc 127 dBm 445 6 mVdc ______ 561 0 mVdc 137 dBm 445 6 mVdc ______ 561 0 mVdc 0 013 µ V 144 75 dBm 546 9 mVdc ______ 772 5 mVdc 4 25 Output Level Flatness Test ____...

Page 145: ...__ 0 5 2 kHz to 600 kHz ______ 1 0 Fixed 400 Hz ______ 0 25 1000 Hz ______ 0 25 4 32 AM 3 dB Bandwidth Test RANGE AM Bandwidth 8 16 MHz 50 0 60 kHz ______ 3 dB 90 0 50 kHz ______ 3 dB 4 8 MHz 50 0 30 kHz ______ 3 dB 90 0 25 kHz ______ 3 dB 1 2 MHz 50 0 20 kHz ______ 3 dB 90 0 12 5 kHz ______ 3 dB 4 33 AM Distortion Test 50 ______ 1 70 ______ 3 90 ______ 3 4 34 AM Sensitivity and Accuracy Test Exte...

Page 146: ...acy 5 4 div ______ 6 7 div 16 32 MHz Rise Time ______ 1 µ s Fall Time ______ 1 µ s Level Accuracy 5 4 div ______ 6 7 div 32 64 MHz Rise Time ______ 1 µ s Fall Time ______ I1 s Level Accuracy 5 4 div ______ 6 7 div 64 128 MHz Rise Time ______ 1 µ s Fall Time ______ 1 µ s Level Accuracy 5 4 div ______ 6 7 div 128 256 MHz Rise Time ______ 1 µ s Fall Time ______ 1 µ s Level Accuracy 5 4 div ______ 6 7...

Page 147: ...MHz 1 954 kHz 2 204 kHz 0 5 1 MHz 1 954 kHz 2 204 kHz Accuracy Frequency Range 256 512 MHz 1 871 kHz 2 287 kHz 128 256 MHz 1 871 kHz 2 287 kHz 64 128 MHz 1 871 kHz 2 287 kHz 32 64 MHz 1 871 kHz 2 287 kHz 16 32 MHz 1 871 kHz 2 287 kHz 8 16 MHz 1 871 kHz 2 287 kHz 4 8 MHz 1 871 kHz 2 287 kHz 2 4 MHz 1 871 kHz 2 287 kHz 1 2 MHz 1 871 kHz 2 287 kHz 0 5 1 MHz 1 871 kHz 2 287 kHz 4 41 Incidental AM Test...

Page 148: ...ty Test Time 0 27 Hz Voltage 0 52 Hz Temperature 10 2 Hz Load No Change Level Change No Change Mode Change No Change 4 45 Phase Lock Restabilization Time Test After two hour warm up 7 Hz After frequency change 7 Hz After band change 7 Hz After 1 min in RF OFF mode 7 Hz 4 84 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 149: ...st normal lab environment 4 17 Harmonics Test None 4 18 Sub harmonics and Non Omit test No mechanism for generation of spurious harmonic Spurious Test signals except counter which is heavily shielded and filtered 4 19 Single Sideband Phase None Noise Test 4 20 Single Sideband Broad None band Noise Floor Test 4 21 Residual AM Test Omit step 4 Normally within specification for 300 Hz to 3 kHz bandwi...

Page 150: ...step 8 but A spot check of meter accuracy is usually Accuracy Test check meter in adequate steps 1 to 7 4 35 Peak Incidental Phase Omit test Test requires access to inside of instrument Modulation Test Specification does not normally degrade with time 4 36 Pulse Modulation Test Omit steps 7 to Performance usually improves at the higher 9 frequencies 4 37 Pulse On Off Ratio Test Omit step 4 Perform...

Page 151: ...vity Test 4 frequencies 4 43 Internal Reference None Accuracy Test 4 44 Internal Reference Drift Omit test Drift is small in a normal lab environment Rate Stability Test 4 45 Phase Lock Restabiliza Omit test Frequency error during the short lock tion Time Test acquisition time usually not significant 4 87 4 88 blank Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www arti...

Page 152: ...t only fuses with the required rated current and of the specified type normal blow time delay etc are used for replacement The use of repaired fuses and the short circuiting of fuseholders must be avoided 5 8 Whenever it is likely that the protection has been imparied the instrument must be made inoperative and be secured against any unintended operation 5 9 TEST EQUIPMENT REQUIED 5 10 Tables 1 2 ...

Page 153: ...hange attenuation in 1 dB steps Band RANGE Resistors A10A2 128 256 MHz R6 R7 R8 64 128 MHz R12 R13 R14 32 64 MHz R18 R19 R20 Attenuation Resistance 3 dB 17 8Ω 287Ω 287Ω 4 dB 23 7Ω 237Ω 237Ω 5 dB 31 6Ω 178Ω 178Ω c To change attenuation change all three resistors associated with the band that s out of specification For example if 64 128 MHz band s second harmonic is too high then R13 R12 and R14 wil...

Page 154: ...cing the circuit The required adjustments are specified in Table 5 2 Allow the instrument to warmup one hour before making any adjustment 5 24 After making the adjustments perform the performance tests found in Section IV specified in the table In general if any casting was opened or any RF connectors removed during a repair the Output Leakage Test should be performed Performance tests should also...

Page 155: ...r only 4 40 A3 RF Oscillator Assy Frequency Range Test Check power supply voltages 256 512 MHz only 5 25 4 11 VT Pot Adjustment 5 35 Frequency Accuracy and Fine VT Voltage Adjustment Tune Test fine tune only 5 36 4 12 Preliminary FM Adjustments Frequency Stability Tests if necessary 5 38 4 13 4 14 4 15 and 4 16 FM Linearity Adjustment if necessary 5 39 5 44 Harmonics Test 4 17 FM Sensitivity Adjus...

Page 156: ... Internal Reference Frequency 4 12 Adjustment if necessary Frequency Stability Tests 5 41 4 13 4 14 4 15 and 4 16 Sub Harmonics and Non Harmonic Spurious Test 4 18 Output Leakage Test 4 29 Counter External Sensitivity Test 4 42 Internal Reference Accuracy Test 4 43 Internal Reference Drift Rate Stability Test 4 44 Phase Lock Restabilization Time Test 4 45 A9 Peak Deviation and Operator s Checks Fi...

Page 157: ...tor Fixed Frequency Modulation or Distortion Test Option 001 Oscillator Adjustment A11 Variable Frequency only 4 31 5 26 Modulation Oscillator or Assy Option 001 Variable Frequency Modulation Oscillator Adjustment 5 27 A12 Rectifier Assy Frequency Stability vs Time Power Supply Adjustments A13 Modulation Metering Test 4 13 5 25 Mother Board Assy Frequency Stability vs Line A14 Line Power Module Vo...

Page 158: ... 5 29 Output Level Flatness Test Output Level Vernier and 4 25 Meter Adjustment 5 31 Output Impedance Test AM Sensitivity Adjustment 4 26 and 4 27 5 32 Auxiliary Output Test 4 28 Output Leakage Test 4 29 AM 3 dB Bandwidth Test 4 32 AM Distortion Test 4 33 AM Sensitivity and Accuracy Test 4 34 Peak Incidental Phase Modulation Test 4 35 Pulse Modulation Test 4 36 Pulse On Off Ratio Test 4 37 Inciden...

Page 159: ...e resistor for a reading within the indicated tolerances Test Point Adjust Voltage Level 5 2V A18TP5 A18R2 5 200V 10 mV 5 2V A20TP10 A20R16 5 200V 10 mV 20V A22TP4 A22R7 20 000V 10 mV 20V A22TP9 A22R19 20 000V 10 mV 44 6V A20TP4 A20R8 44 600V 100 mV For ambient temperatures other than 25 c modify the voltage level setting by 4 2 mV C Perform FM CAL adjustment paragraph 5 38 step 8 and time base ad...

Page 160: ...e AUDIO OUTPUT LEVEL dial should read 100 m Vrms If it does not loosen setscrews on knob and align knob so that it does 4 Set MODULATION FREQUENCY to 400 Hz Set AUDIO OUTPUT LEVEL fully cw The DVM should read 1 Vrms 1 Vrms 5 27 VARIABLE FREQUENCY MODULATION OSCILLATOR ADJUSTMENT OPTION 001 REFERENCE Service Sheet 9A DESCRIPTION A digital voltmeter and a frequency counter are used to monitor output...

Page 161: ...EQUENCY Switch X100 MODULATION FREQUENCY Vernier Full ccw FM OFF AUDIO OUTPUT LEVEL Full cw 5 Connect DVM to OSC OUT test point A11TP4 The DVM should read 1 6 0 3 Vrms 1 3 1 9 Vrms 6 Connect frequency counter to AM OUTPUT jack The counter should read 1 8 0 2 kHz 1 6 2 0 kHz 7 Set MODULATION FREQUENCY vernier full cw and adjust trim capacitors A11C2 and C3 until voltage level at Al11TP4 is within 0...

Page 162: ...range switch to X100 and the vernier to 20 Adjust AM FM adjustment A11R35 for 840 10 m Vrms at A11TP5 830 850 m Vrms 15 Connect DVM to the FM OUT test point AllTP3 It should read within 5 m Vrms of reading in step 14 5 mVrms 16 Use MODULATION FREQUENCY range switch and vernier to tune oscillator across each range except 400 and 1000 Hz FIXED FREQ Monitor voltage level at AllTP3 the DVM should read...

Page 163: ...djusting peg 3 Set generator s controls as follows Meter Function FM FM OFF MODULATION FREQUENCY 1000 Hz PEAK DEVIATION 10 kHz PEAK DEVIATION Vernier Full ccw RANGE 2 4 MHz LINE ON 4 Connect DVM to DC OUT test point A2TP2 on A2 Meter Switch Detector Assembly Adjust DET OFFSET pot A2R5 for 0 Vdc 1 mVdc at A2TP2 5 Connect DVM to MTR ADJ test point A4TP1 on A4 Meter Annunciator Drive Assembly Adjust ...

Page 164: ...ff Adjust Detector Adjust pot A26A1R11 for 61 2 mVdc at DET test point 3 Set AGC switch to on and set front panel RF ON OFF switch to ON 4 Perform Output Level Vernier and Meter Adjustment paragraph 5 31 5 30 OUTPUT LEVEL KNOB ADJUSTMENT REFERENCE Service Sheets 13 and 16 DESCRIPTION The RF attenuator knob is set and the vernier voltage is monitored with a digital voltmeter and the vernier pot is ...

Page 165: ...the voltage at the VERN test point noted in step 4 20 mV 6 Without moving vernier turn brass gear shaft until cursor points to 7 5 dBm on dial Tighten setscrew in brass gear 7 Perform the Output Level Vernier and Meter Adjustment paragraph 5 31 5 31 OUTPUT LEVEL VERNIER AND METER ADJUSTMENT REFERENCE Service Sheets 12 and 16 DESCRIPTION The RF level accuracy for the upper OUTPUT LEVEL attenuator r...

Page 166: ...d the Meter Adjustments 5 28 are correct before performing this adjustment 2 After making meter adjustments which are accessible only from the bottom of the instrument check the adjustment with the instrument in its normal operating position Figure 5 1 Output Level Vernier and Meter Adjustment Test Setup EQUIPMENT Spectrum Analyzer HP 141T 8552B 8553B Power Meter HP 435A Power Sensor HP 8481A 20 d...

Page 167: ...n resolution bandwidth to 10 kHz frequency span per division scan width to 5 kHz input attenuation to 0 dB display smoothing video filter to 100 Hz and log linear display switch to 2 dB log Set the reference level switch for a 10 dBm reference level at the top graticule line on the display adjust the reference level vernier to place the signal to the display s fifth horizontal graticule line 7 Set...

Page 168: ...eet 14 DESCRIPTION AM sensitivity is adjusted while comparing the actual amount of amplitude modulation to the level of the input modulating signal A spectrum analyzer is used to measure the actual modulation The analyzer is used with zero frequency span at the carrier frequency A DVM is used to measure the ac and dc voltages at the analyzer s vertical output and the dc value of the carrier is set...

Page 169: ...r frequency and scale reference level controls to center the 512 MHz signal on the display Set frequency span per division to 0 Hz and display smoothing video filter to 10 kHz Peak the trace on the display with center frequency controls set trace to center of display with reference controls NOTE Step 4 measures the analyzer s dc offset V off and must be performed to ensure the accuracy of this tes...

Page 170: ...er display 6 Set DVM to measure mVrms ac only Adjust AM adjustment A26A2R19 for a DVM indication of 100 mVrms 5 33 PEAK DEVIATION AND RANGE SWITCH ADJUSTMENT REFERENCE Service Sheets 6 7 and 8 DESCRIPTION The switches are adjusted so that the FM gain switch i e A9S3 the switch that is controlled by both the peak deviation and the frequency range switch is correctly positioned This procedure should...

Page 171: ... divider filter cams are positioned so that the frequency at RF OUTPUT agrees with the frequency indicated on the generator s readout The RANGE switch knob is then set to the correct range This procedure should be performed whenever the A9 assembly or the A10 assembly has been removed or replaced EQUIPMENT Frequency Counter HP 5327C PROCEDURE 1 Connect frequency counter high frequency input to RF ...

Page 172: ...ately with generator s readout the correct frequency counter reading for the EXT DOUBLER 512 1024 MHz position is approximately 256 MHz 5 35 VT POT A3R1 ADJUSTMENT REFERENCE Service Sheet 5 DESCRIPTION The VT pot is aligned so that it will not hit either end stop as the FREQUENCY TUNE control is tuned through its full range This adjustment should be performed whenever the pot has been replaced Fig...

Page 173: ...f pot see Figure 5 3 B 6 Tighten casting setscrew 7 Perform the VT Voltage Adjustment paragraph 5 36 5 36 VT VOLTAGE ADJUSTMENT REFERENCE Service Sheets 5 10 and 11 DESCRIPTION This procedure should be performed whenever either the VT pot the A3 assembly or the A10A2 assembly has been replaced PROCEDURE 1 Set Signal Generator s controls as follows Meter Function LEVEL COUNTER MODE EXPAND Off LOCK ...

Page 174: ...5 37 RF FILTER ADJUSTMENT RE VERENCE Service Sheet 10 DESCRIPTION A spectrum analyzer and a tracking generator are used to measure the insertion loss and frequency response of each of the RF filters Those filters that are adjustable are adjusted if necessary A frequency counter connected to the tracking generator s auxiliary output is used to accurately set the analyzer s frequency This procedure ...

Page 175: ... s controls as follows RANGE 256 512 MHz FREQUENCY TUNE Fully cw RF ON OFF OFF 2 Set spectrum analyzer center frequency to 550 MHz frequency span scan width to 100 MHz per division resolution bandwidth to 10 kHz and input attenuation to 20 dB 3 Set tracking generator s output level to 0 dBm Adjust the tracking for maximum response in a 10 kHz resolution bandwidth Tracking should be checked periodi...

Page 176: ...equency span controls as listed in the table Connect test cables to RF filter input and output as shown in the test setup Check maximum loss at pass band frequency center vertical graticule line and below it should be as specified d Set analyzer s frequency span controls to zero Hz Adjust analyzer s center frequency controls for a frequency counter indication of the stop band frequency listed in t...

Page 177: ...MHz 3 dB 115 MHz 25 dB None 32 64 MHz Full cw High 10 MHz 69 MHz 3 dB 86 5 MHz 25 dB None Full ccw Low 5 MHz 45 MHz 3 dB 58 MHz 25 dB None 16 32 MHz Full cw High 5 MHz 34 MHz 3 dB 43 2 MHz 20 dB None Full ccw Low 2 MHz 22 MHz 3 dB 28 7 MHz 20 dB None 8 16 MHz Full cw High 2 MHz 17 0 MHz 3 dB 21 6 MHz 15 dB None Full ccw Low 2 MHz 11 0 MHz 3 dB 14 3 MHz 15 dB None 4 8 MHz 1 MHz 8 6 MHz 3 dB 10 7 MH...

Page 178: ... oscillator this is necessary only if either the oscillator or the pot has been changed Then the DVM is used to adjust the FM calibration voltage and the offset balance voltages in the FM amplifiers EQUIPMENT Digital Voltmeter HP 3480B 3484A PROCEDURE 1 Set Signal Generator s controls as follows Meter Function FM COUNTER MODE EXPAND Off LOCK Off Source INT AM OFF FM OFF PEAK DEVIATION 2 56 MHz See...

Page 179: ...nt A5TP6 and adjust BUFFER OFFSET adjustment A5R23 for 0 0 5 mVdc at A5TP6 6 Connect DVM to A3A4TP2 and adjust OFFSET adjustment A3A4R5 for 0 0 5 mVdc at A3A4TP2 7 Connect DVM to OUTPUT test point A5TP2 and adjust AMPLIFIER OFFSET adjustment A5R8 for 0 1 0 mVdc at A5TP2 8 To adjust calibration voltage set FM switch to CAL set DVM to measure dc voltage and connect DVM to FM BUFFER IN test point A5T...

Page 180: ...output of a variable phase generator is used to drive the Signal Generator s FM circuits its variable phase output is used to drive an oscilloscope s horizontal circuits and the FM linearity circuit A discriminator is used to demodulate the FM and the demodulated signal is subtracted i e summed 180 out of phase from the modulation signal in the FM linearity circuit and fed to the oscilloscope s ve...

Page 181: ...t for Discriminator HP 10531A Variable Phase Generator HP 203A Oscilloscope HP 180A 1801A 1820C FM Linearity Circuit HP 08640 60503 20 dB Amplifier HP 465A NOTE The reference signal generator should have low RF drift low residual FM performance approximately equal to the Model 8640A and be capable of producing 355 MHz at 7 dBm 5 30 Artisan Technology Group Quality Instrumentation Guaranteed 888 88...

Page 182: ...5 MHz CW signal at 7 dBm 3 Calibrate the discriminator prepare a 25 kHz filter from the filter kit and install it in the discriminator Set FM linearity circuit s output switch to ref Adjust variable phase generator s variable phase output s amplitude and the oscilloscope s horizontal gain for full screen deflection on the display Adjust reference signal generator for 5 MHz on the discriminator 4 S...

Page 183: ...st possible horizontal straight line at both ends of the trace but within one major division or 1 8 Perform the FM Sensitivity Adjustment paragraph 5 40 5 40 FM SENSITIVITY ADJUSTMENT REFERENCE Service Sheets 6 and 7 DESCRIPTION The Signal Generator is frequency modulated with an accurate 1 Vpk 16 63 kHz signal The modulated RF output is monitored on a spectrum analyzer and FM sensitivity is adjus...

Page 184: ...n FM COUNTER MODE EXPAND Off LOCK Off Source INT AM OFF FM OFF PEAK DEVIATION 40 kHz PEAK DEVIATION Vernier Full cw RANGE 16 32 MHz FREQUENCY TUNE 24 MHz OUTPUT LEVEL 37 dBm RF ON OFF ON 2 Set spectrum analyzer s center frequency to 24 MHz resolution bandwidth to 3 kHz frequency span scan width per division to 20 kHz and input attenuation to 0 dB Center signal on display and use reference level co...

Page 185: ...nerator s FREQUENCY TUNE to 32 MHz Adjust analyzer to center the carrier on the display Adjust HI FM SENS adjustment A3A4R4 for at least 50 dB of carrier null 7 Repeat steps 4 through 6 until carrier null is 50 dB at 16 24 and 32 MHz 8 Perform the FM distortion and FM sensitivity and accuracy tests in Section IV 5 41 INTERNAL REFERENCE FREQUENCY ADJUSTMENT REFERENCE Service Sheet 19 DESCRIPTION An...

Page 186: ...e 5 10 after setting Signal Generator s controls as follows TIME BASE REF INT EXT on rear panel INT TIME BASE VERNIER CAL 3 Set oscilloscope s vertical sensitivity to 0 05 V div ac and horizontal scale for external ac Set magnifier for X 10 and adjust oscilloscope s controls for a Lissajous figure 4 Adjust time base adjustment pot available through the hole in the front of the counter casting for ...

Page 187: ...er 3 Switch LINE to ON and let instrument warm up for one hour 4 Check that Varactor Anode bias is 14 70 0 01 Vdc at A7TP2 5 Tune FREQUENCY TUNE fully ccw Compare the position of the stop ring teeth with Figure 5 11 NOTE Notice how the teeth on the stop rings line up in a staircase at the end stops The stop pin and the adjustable stop ring determine the lower frequency limit The stop pin and forwa...

Page 188: ...e how far off the frequency is 12 Adjust FREQUENCY TUNE cw until first setscrew on adjustable stop ring appears Loosen setscrew 13 Tune further cw until second setscrew appears 14 Loosen setscrew and rotate FREQUENCY TUNE up or down by the amount of correction needed as noted in step 11 and tighten setscrew Do not allow adjustable stop ring to rotate 15 Recheck low stop frequency and repeat preced...

Page 189: ...oscillator cavity Figure 5 12 RF Oscillator Output Power Adjustment Test Setup EQUIPMENT Power Meter HP 435A Power Sensor HP 8481 Spectrum Analyzer HP 141T 8552B 8554B PROCEDURE 1 Remove A3 RF Oscillator from chassis 2 Remove cover from the appropriate buffer amplifier assembly 3 Re insert A3A4 Connector Board Assembly into place while keeping oscillator section free of chassis It may be necessary...

Page 190: ... band and observe second and third harmonics which should be more than 17 dB below fundamental for all frequencies 11 Re install RF Oscillator 12 Perform Harmonics Test 4 17 Output Level Flatness Test 4 25 Single Sideband Phase Noise Test 4 19 or Residual FM Test 4 22 and Output Leakage Test 4 29 5 44 FM LINEARITY ADJUSTMENT Alternate REFERENCE Service Sheet 7 DESCRIPTION The Signal Generator is m...

Page 191: ...Generator s controls as follows Meter Function FM COUNTER MODE EXPAND Off LOCK Off Source INT AM OFF MODULATION FREQUENCY 1 kHz Fixed FM INT PEAK DEVIATION 5 kHz PEAK DEVIATION Vernier Fully cw RANGE 0 5 1 MHz FREQUENCY TUNE 0 7MHz OUTPUT LEVEL 13 dBm RF ON OFF ON NOTE If it is desired to optimize FM linearity at a frequency other than mid band proceed as follows a Set RANGE and FREQUENCY TUNE to ...

Page 192: ...on panel meter Use analyzer s display reference level controls to set the demodulated 1 kHz signal to the top reference graticule line on the display 6 Adjust POS SHAPE and NEG SHAPE adjustments A7R12 and A7R41 for minimum distortion Observe both second and third harmonics 7 Slowly tune from 0 5 to 1 MHz and observe distortion If harmonics are less than 30 dB down 3 distortion or if it is desired ...

Page 193: ... order by reference designation b Chassis mounted parts in alpha numerical order by reference designation c Miscellaneous parts 6 9 The information given for each part consist of the following a The Hewlett Packard part number b The total quantity Qty in the instrument c The description of the part d A typical manufacturer of the part in a five digit code e The manufacturer s number for the part 6...

Page 194: ...ut Level Assembly A8 Counter Lock Assembly A9 Peak Deviation and Range Switch Assembly A10 Divider Filter Assembly All Variable Frequency Modulation Oscillator Assembly Option 001 A26 AM AGC and RF Amplifier Assembly 6 18 Figures 6 1 and 6 2 are breakdowns of the generator s cabinet parts and the parts that comprise the Type N connector J1 Table 6 1 Part Numbers for Exchange Assemblies Reference D...

Page 195: ...inear taper used tion dBm decibel referred FXD fixed in parts list AMPL amplifier to 1 mW g gram lin linear APC automatic phase de direct current GE germanium LK WASH lock washer control deg degree temperature GHz gigahertz LO low local oscillator ASSY assembly interval or differ GL glass LOG logarithmic taper AUX auxiliary ence GRD ground ed used in parts list avg average degree plane H henry log...

Page 196: ... peak PLO phase lock SCR silicon controlled VDCW volts dc working µ Vrms microvolt rms oscillator rectifier screw used in parts list µ W microwatt PM phase modulation SE selenium V F volts filtered nA nanoampere PNP positive negative SECT sections VFO variable frequency NC no connection positive SEMICON semicon oscillator N C normally closed P O part of ductor VHF very high fre NE neon POLY polyst...

Page 197: ...9 2 RESISTOR 28 7K 1 125W F TC 0 100 16299 C4 1 8 T0 2872 F A1A1R4 0757 0280 14 RESISTOR 1K 1 125W F TC 0 100 24546 C4 1 8 T0 1001 F A1A1R5 2100 2521 3 RESISTOR TRMR 2K 10 C SIDE ADJ 1 TURN 30983 ET50X202 A1A1R6 2100 2521 RESISTOR TRMR 2K 10 C SIDE ADJ 1 TURN 30983 ET50X202 A1A2 08640 60205 1 OUTPUT ATTENUATOR ASSY 28480 08640 60205 A2 08640 60031 1 METER SWITCH DETECTOR ASSY 28480 08640 60031 A2C...

Page 198: ...80 08640 60034 A3A1FL1 0160 0204 13 CAPACITOR FLTR 5500PF GMV 200v 01121 SMFB A2 A3A1FL2 0160 0204 CAPACITOR FLTR 5500PF GMV 200V 01121 SMFB A2 A3A1FL3 0160 0204 CAPACITOR FLTR 5500PF GMV 200V 01121 SMFB A2 A3A1FL4 0160 0204 CAPACITOR FLTR 5500PF GMV 200V 01121 SMFB A2 A3A1FLS 0160 0204 CAPACITOR FLTR 5500PF GMV 200V 01121 SMFB A2 A31AFL6 0160 0204 CAPACI TOR FLTR 5500PF GMV 200V 01121 SMFB A2 A3A...

Page 199: ...54 0247 A3A1A3Q2 1854 0247 TRANSISTOR NPN SI TO 39 PD 1W FT 800MHZ 28480 1854 0247 A3A1A3R1 0757 0422 RESISTOR 909 1 125W F TC 0 100 24546 C4 1 8 T0 909R F A3A1A3R2 0698 7212 RESISTOR 100 2 05W F TC 0 100 24546 C3 1 8 T0 100R G A3A1A3R3 0698 7188 RESISTOR 10 2 05W F TC 0 100 24546 C3 1 5 T00 10R G A3A1A3R4 0698 3445 RESISTOR 348 1 125W F TC 0 100 16299 C4 1 8 T0 348R F A3A1A3R5 0698 7216 1 RESISTO...

Page 200: ...DJ 1 TURN 30983 ET50XZ02 A4R20 0757 0280 2 RESISTOR 9 09K 1 125W F TC 0 100 19701 MF4C1 8 T0 9091 F A4R21 0683 1065 1 RESISTOR 10M 5 25W FC TC 900 1100 01121 CR1065 A4R22 0696 5094 1 RESISTOR 5 1M 5 25W FC TC 900 1100 01121 C85155 A4TP1 0360 1514 TERMINAL STUD SGL PIN PRESS MTG 28480 0360 1514 A4TP2 0360 1514 TERMINAL STUD SGL PIN PRESS MTG 28480 0360 1514 A4TP3 0360 1514 TERMINAL STUD SGL PIN PRE...

Page 201: ...STOR 121 1 125W F TC 0 100 24546 C4 1 8 T0 121R F A5R4 0757 0290 3 RESISTOR 6 19K 1 125W F TC 0 100 19701 MF4C1 8 T0 6191 F A5R5 0757 0317 2 RESISTOR 1 33K 1 125W F TC 0 100 24546 C4 1 8 T0 1331 F A5R6 0698 3132 3 RESISTOR 261 1 125W F TC 0 100 16299 C4 1 8 T0 2610 F A5R7 0698 3410 1 RESISTOR 3 16K 1 5W F TC 0 100 24546 NA6 A5R8 2100 3164 1 RESISTOR TRMR 10 20 C SIDE ADJ 17 TURN 32997 3006P 1 100 ...

Page 202: ...7C12 0160 2204 CAPACITOR FXD 100PF 5 300WVDC MICA 93790 RDM15F101J3C A7C13 0180 2206 1 CAPACITOR FXD 60UF 10 6VDC TA 56289 1500606X9006B2 A1CR1 1901 0033 20 DIODE GEN PRP 180V 200MA DO 7 28480 1901 0033 A7CR2 1901 0033 DIODE GEN PRP 180V 200MA DO 7 28480 1901 0033 A7CR3 1901 0033 DIODE GEN PRP 180V 200MA DO 7 28480 1901 0033 A7CR4 1901 0033 DIODE GEN PRP 180V 200MA DO 7 28480 1901 0033 A7CR5 1901 ...

Page 203: ... 0757 0395 1 RESISTOR 56 2 1 125W F TC 0 100 24546 C4 1 8 T0 56R2 F A7R33 0698 3435 1 RESISTOR 38 3 1 125W F TC 0 100 16299 C4 I1 8 T0 38R3 F A7R34 0698 3432 2 RESISTOR 26 1 1 125W F TC 0 100 03888 PME55 1 8 T0 26R1 F A7R35 0757 0294 1 RESISTOR 17 8 1 125W F TC 0 100 19701 MF4C1 8 T0 17R8 F A7R36 0698 3427 1 RESISTOR 13 3 1 125W F TC 0 100 03888 PME55 1 8 T0 13R3 F A7R37 0757 0346 RESISTOR 10 1 12...

Page 204: ...1 WASHER LK INTL T NO 1 4 256 IN ID 78189 1914 00 A8MP3 3050 0443 1 WASHER FL NM NO 8 176 IN ID 375 1N OD 86928 5624 16 10 A8MP4 8160 0219 1 RFI STRIP NI ALY 1 06 W 2 64 L 28400 8160 0219 A8MP5 8160 0220 1 RFI STRIP NI ALY 2 48 W 4 215 L 28480 8160 0220 A8MP6 08640 00001 1 SHIELD LED TAPE 28480 00640 00001 A8MP7 08640 00009 1 COVER CENTER FILTER 28480 08640 00009 A8MP8 08640 00051 1 FRAME C SHIELD...

Page 205: ...R 1K 2 05W F TC 0 I00 24546 C3 1 8 TO 1001 G A8A1R2 NOT ASSIGNED A8A1R3 NOT ASSIGNED A8A1R4 0698 7248 4 RESISTOR 3 16K 2 05W F TC 0 100 24546 C3 1 8 TO 3161 G A8A1R5 0698 7248 RESISTOR 3 16K 2 05W F TC 0 100 24546 C3 1 8 TO 3161 G A8A1R6 0698 7212 RESISTOR 100 2 05W F TC 0 100 24546 C3 1 8 TO 100R G A8A1R7 0757 0394 RESISTOR 51 1 1 125W F TC 0 100 24546 C4 1 8 TO 51R1 F A8A1R8 0757 0416 RESISTOR 5...

Page 206: ... 1853 0020 TRANSISTOR PNP SI PD 300MW FT 150MHZ 28480 1853 0020 A8A2Q18 1854 0071 TRANSISTOR NPN SI PD 300MW FT 200MHZ 28480 1854 0071 A8A2R1 0698 3440 RESISTOR 196 1 125W F TC 0 100 16299 C4 1 8 TO 1962 F A8A2R2 0757 0438 RESISTOR 5 11K 1 125W F TC 0 100 24546 C4 1 8 TO 5111 F A8A2R3 0698 7253 6 RESISTOR 5 11K 2 05W F TC 0 100 24546 C3 1 8 TO 5111 G A8A2R4 0698 7253 RESISTOR 5 11K 2 05W F TC 0 10...

Page 207: ...A2U2 1820 0054 IC SN74 00 N GATE 01295 SN7400N A8A2U3 1820 0054 IC SN74 00 N GATE 01295 SN7400N A8A2U4 1820 0174 2 IC SN74 04 N INV 01295 SN7404N A8A2U5 1820 0077 IC SN74 74 N FLIP FLOP 01295 SN7474N A8A2U6 1820 0328 2 IC SN74 02 N GATE 01295 SN7402N A8A2U7 1820 0701 6 IC LATCH 07263 93L14DC A8A2U8 1820 0701 IC LATCH 07263 93L14DC A8A2U9 1820 0701 IC LATCH 07263 93L14DC A8A2U10 1820 0701 IC LATCH ...

Page 208: ...F CHOKE 1MH 5 24226 19 104 A8A3L4 9140 0137 COIL FXD MOLDED RF CHOKE 1MH 5 24226 19 104 A8A3L5 9140 0137 COIL FXD MOLDED RF CHOKE 1MH 5 24226 19 104 A8A3L6 9140 0137 COIL FXD MOLDED RF CHOKE 1MH 5 24226 19 104 A8A3L7 9140 0137 COIL FXD MOLDED RF CHOKE 1MH 5 24226 19 104 A8A3L8 9140 0137 COIL FXD MOLDED RF CHOKE 1MH 5 24226 19 104 A8A3L9 9140 0137 COIL FXD MOLDED RF CHOKE 1MH 5 24226 19 104 A8A3L10...

Page 209: ...0 PIN IC 28480 1200 0472 A8A4MP1 03431 01201 3 BRACKET MOUNTING 28480 03431 01201 A8A4MP2 03431 01201 BRACKET MOUNTING 28480 03431 01201 A8A4MP3 03431 01201 BRACKET MOUNTING 28480 03431 01201 A8A4P1A 1260 0363 1 CONNECTOR 11 PIN 28480 1260 0363 A8A4P1B 1260 0364 1 CONNECTOR 25 PIN 28480 1260 0364 A8A4Q1 1854 0071 TRANSISTOR NPN SI PD 300MW FT 200MHZ 28480 1854 0071 A8A4R1 2100 0647 1 RESISTOR VAR ...

Page 210: ...2 BD THKNS 1 LG 28480 0403 0158 A10MP4 8160 0226 1 RFI ROUND STRIP NI ALY 062 0D 28480 8160 0226 A10MP5 08640 00047 1 SHIELD SPRING 1 28480 08640 00047 A10MP6 08640 00048 1 SHIELD SPRING 2 28480 08640 00048 A10MP7 08640 00049 1 SHIELD SPRING 13 28480 08640 00049 A10MP8 08640 00050 1 SHIELD SPRING 14 28480 08640 00050 A10MP9 08640 20268 1 CAST TOP COVER D F 28480 08640 20268 A10MP10 08640 20269 1 C...

Page 211: ...60 0974 CAPACITOR FXD 80PF 2 300WVDC MICA 28480 0160 0974 A10A1C57 0160 2201 CAPACITOR FXD 51PF 5 300WVDC MICA 28480 0160 2201 A10A1C58 0160 2306 1 CAPACITOR FXD 27PF 5 300WVDC MICA 28480 0160 2306 A10A1C59 0160 2201 CAPACITOR FXD 51PF 5 300WVDC MICA 28480 0160 2201 A10A1C60 0160 2201 CAPACITOR FXD 51PF 5 300WVDC MICA 28480 0160 2201 A10A1C61 0160 2199 CAPACITOR FXD 30PF 5 300WVDC MICA 28480 0160 ...

Page 212: ...OIL FXD MOLDED RF CHOKE 115UH 5 0004A AC 105J P A10A1L29 9100 3356 1 COIL FXD MOLDED RF CHOKE 125UH 5 0004A AC 125J P A10A1L30 9100 3355 COIL FXD MOLDED RF CHOKE 115UH 5 0004A AC 115J P A10A1L31 9100 3513 3 COIL FXD NON MOLDED RF CHOKE 7 5UH 24226 8123 2 A10A1L32 9100 3513 COIL FXD NON MOLDED RF CHOKE 7 5UH 24226 8123 2 A10A1L33 9100 3513 COIL FXD NON MOLDED RF CHOKE 7 5UH 24226 8123 2 A10A1L34 91...

Page 213: ...0 20 1000WVDC CER 28480 0160 2055 A10A2C11 0160 3456 CAPACITOR FXD 1000PF 10 1000WVDC CER 28480 0160 3456 A10A2C12 0160 2055 CAPACITOR FXD 01UF 80 20 100WVDC CER 28480 0160 2055 A10A2C13 0160 3456 CAPACITOR FXD 1000PF 10 1000WVDC CER 28480 0160 3456 A10A2C14 0160 3456 CAPACITOR FXD 1000PF 10 1000WVDC CER 28480 0160 3456 A10A2C15 0160 3456 CAPACITOR FXD 1000PF 10 1000WVDC CER 28480 0160 3456 A10A2C...

Page 214: ...0394 RESISTOR 51 1 1 125W F TC 0 100 24546 C4 1 8 TO 51R1 F A10A2R4 0757 0984 9 RESISTOR 10 1 5W F TC 0 100 19701 MF7C1 2TO 10R0 F A10A2R5 0757 0438 RESISTOR 5 11K 1 125W F TC 0 100 24546 C4 1 8 TO 5111 F A10A2R6 0698 7194 3 RESISTOR 17 8 2 05W F TC 0 100 24546 C3 1 8 TO 17R8 G A10A2R7 0698 7223 6 RESISTOR 287 2 05W F TC 0 100 24546 C3 1 8 TO 287R G A10A2R8 0698 7223 RESISTOR 287 2 05W F TC 0 100 ...

Page 215: ...AL STUD SGL PIN PRESS MTG 28480 0360 1514 A10A2TP 0360 1514 TERMINAL STUD SGL PIN PRESS MTG 28480 0360 1514 A10A2TP 0360 1514 TERMINAL STUD SGL PIN PRESS MTG 28480 0360 1514 A10A2TP 0360 1514 TERMINAL STUD SGL PIN PRESS MTG 28480 0360 1514 A10A2U 1826 0013 IC OP AMP 28480 1826 0013 A10A2U 1820 0102 IC MC 1013P FLIP FLOP 04713 MC1013P A10A2U 1820 0102 IC MC 1013P FLIP FLOP 04713 MC1013P A10A2U 1820...

Page 216: ...C 0 100 24546 C4 1 8 TO 1001 F A11R11 0757 0438 4 RESISTOR 5 11K 1 125W F TC 0 100 24546 C4 1 8 TO 5111 F A11R12 0757 0438 RESISTOR 5 11K 1 125W F TC 0 100 24546 C4 1 8 TO 5111 F A11R13 0757 0438 RESISTOR 5 11K 1 125W F TC 0 100 24546 C4 1 8 TO 5111 F A11R14 0698 0085 RESISTOR 2 61K 1 5W F TC 0 100 51629 C4 1 8 TO 2611F A11R15 0757 0401 RESISTOR 100 1 125W F TC 0 100 24546 C4 1 8 TO 101 F A11R16 0...

Page 217: ...0 A11MP1 0340 0037 2 TERMINAL STUD DBL TUR PRESS MTG 28480 0340 0037 0340 0039 2 TERMINAL BUSHING TEFLON MOUNTS IN 28480 0340 0039 A11MP2 0340 0037 TERMINAL STUD DBL TUR PRESS MTG 28480 0340 0037 0340 0039 TERMINAL BUSHING TEFLON MOUNTS IN 28480 0340 0039 A11MP3 1430 0764 1 GEAR SPUR 28480 1430 0764 A11MP4 08640 00006 1 COVER AUDIO OSCILLATOR 28480 08640 00006 A11MP5 08640 20090 4 SUPPORT COVER AU...

Page 218: ... 2100 2521 RESISTOR TRMR 2K 10 C SIDE ADJ 1 TURN 30983 ET50X202 A11R41 0698 0082 RESISTOR 464 1 125W F TC 0 100 16299 C4 1 8 TO 4640 F A11R42 0757 0200 RESISTOR 5 62 1 125W F TC 0 100 24546 C4 1 8 TO 5621 F A11R43 0757 0401 RESISTOR 100 1 125 F TC 0 100 24546 C4 1 8 TO 101 F A11R44 0757 0401 RESISTOR 100 1 125 F TC 0 100 24546 C4 1 8 TO 101F A11R45 0757 0442 RESISTOR 100 1 125 F TC 0 100 24546 C4 ...

Page 219: ...152 F A11A1R7 0698 3454 RESISTOR 215K 1 125W F TC 0 100 16299 C4 1 8 TO 2153 F A11A1R8 0698 5903 RESISTOR 2 4H 1 5W F TC 0 100 91637 MFF 1 2 10 A11A1S1 08640 60108 1 SWITCH ASSY AUDIO OSCILLATOR 28480 08640 60108 3100 3081 1 SWITCH ROTARY 28480 3100 3081 See introduction to this section for ordering information 6 27 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www arti...

Page 220: ...00 24546 C4 1 8 TO 1002 F A12R5 0757 0442 RESISTOR 10K 1 2 125W F TC 0 100 24546 C4 1 8 TO 1002 F A12R6 0757 0442 RESISTOR 10K 1 125W F TC 0 100 24546 C4 1 87TO 1002 F A12R7 0757 0442 RESISTOR 10K 1S 125W F TC 0 100 24546 C4 1 8 TO 1002 F A12VR1 1902 3393 1 DIODE 2NR 75V 5 DO 7 PO 4W TC 077 04713 SZ 10939 434 A13 08640 60002 1 MODULATION METERING MOTHER BOARD ASSY 28480 08640 60002 A13C1 0180 2208...

Page 221: ...25X9020A2 A18C5 0160 2055 1 CAPACITOR FXD 01UFF 80 20 100WVDC CER 28480 0160 2055 A18CR1 1901 0040 21 DIODE SWITCHING 30V 50MA 2NS DO 35 28480 1901 0040 A18CR2 1901 0025 4 DIODE GEN PRP 100V 200MA DO 7 28480 1901 0025 A18CR3 1901 0025 DIODE GEN PRP 100V 200MA DO 7 28480 1901 0025 A1BCR4 1901 0040 DIODE SWITCHING 30V 50MA 2NS DO 35 28480 1901 0040 A18CR5 1901 0040 DIODE SWITCHING 30V 50MA 2NS DO 35...

Page 222: ...R SGL CONT SKT 04 DIA 00779 3 332070 5 A19 NOT ASSIGNED A20 08640 60005 1 REGULATOR ASSY 5 2V 44 6V 28480 08640 60005 A20C1 0160 0153 1 CAPACITOR FXD 1000PF 10 200WVDC POLYE 56289 292P10292 A20C2 0180 0229 CAPACITOR FXD 33UF 10 10VDC TA 56289 150D336X9010B2 A20C3 0180 0234 1 CAPACITOR FXD 33UF 20 75VDC TA MET 56289 109D336X0075F2 A20C4 0180 0228 1 CAPACITOR FXD 22UF 10 15VDC TA 56289 1500226X9015B...

Page 223: ...1514 TERMINAL STUD SGL PIN PRESS MTG 28480 0360 1514 A20U1 1826 0010 IC UA 723 V RGLTR 07263 723HM A20U2 1826 0010 IC UA 723 V RGLTR 07263 723HM A20VR1 1902 0025 2 DIODE ZNR IOV 5 DO 7 PD 4W TC 06 04713 SZ 10939 L82 A20VR2 1902 3234 1 DIODE ZNR 19 6V 5 DO 7 PD 4W TC 073 04713 SZ 10939 266 A20VR3 1902 0244 1 DIODE ZNR 30 1V 5 DO 15 PD 1W TC 075 28480 1902 0244 A20VR4 1902 3345 1 DIODE ZNR 51 1V 5 D...

Page 224: ...3 1 8 TO 1002 G A22R27 0698 7260 RESISTOR 10K 2 05W F TC 0 100 24546 C3 1 8 TO 1002 G A22TP1 0360 1514 TERMINAL STUD SGL PIN PRESS MTG 28480 0360 1514 A22TP2 0360 1514 TERMINAL STUD SGL PIN PRESS MTG 28480 0360 1514 A22TP3 0360 1514 TERMINAL STUD SGL PIN PRESS MTG 28480 0360 1514 A22TP4 0360 1514 TERMINAL STUD SGL PIN PRESS MTG 28480 0360 1514 A22TP5 0360 1514 TERMINAL STUD SGL PIN PRESS MTG 28480...

Page 225: ...RN POLYC 062 BD THKNS 1 LG 28480 0403 0153 A26MP12 0403 0156 1 GUIDE PC BD YEL POLYC 062 BD THKNS 1 LG 28480 0403 0156 A26MP13 0403 0157 1 GUIDE PC BD GRN POLYC 062 BD THKNS 1 LG 28480 0403 0157 A26MP14 2200 0107 1 SCREW MACH 4 40 375 IN LG PAN HO PO21 28480 2200 0107 A26MP15 0520 0127 1 SCREW MACH 2 56 188 IN LG PAN HOD PO21 28480 0520 0127 A26MP16 2360 0201 1 SCREW MACH 6 32 5 IN LG PAN HC PO2I ...

Page 226: ...05X9035A2 A26A2C2 0180 0291 CAPACITOR FXD 1UF 10 35VDC TA 56289 150D105X9035A2 A26A2C3 0180 0291 CAPACITOR FXD 1UF 10 35VDC TA 56289 150D105X9035A2 A26A2C4 0180 0291 CAPACITOR FXD 1UF 10 35VDC TA 56289 150D105X9035A2 A26A2C5 0160 3450 2 CAPACITOR FXD 5000PF 10 250WVDC CER 28480 0160 3450 A26A2C6 0160 0161 2 CAPACITOR FXD 01UF 10 200WVDC POLYE 56289 292P10392 A26A2C7 0160 3450 CAPACITOR FXD 5000PF ...

Page 227: ...46 C4 1 8 TO 5111 F A26A2R27 0698 0085 RESISTOR 2 61K 1 125w F TC 0 100 16299 C4 1 8 TO 2611 F A26A2R28 0698 3162 RESISTOR 46 4K 1 125W F TC 0 100 16299 C4 1 8 TO 4642 F A26A2R29 0698 3150 RESISTOR 2 37K 1 125W F TC 0 100 16299 C4 1 8 TO 2371 F A26A2R30 0757 0438 RESISTOR 5 11K 1 125W F TC 0 100 24546 C4 1 8 TO 5111 F A26A2R31 0698 3154 RESISTOR 4 22K 1 125W F TC 0 100 16299 C4 1 8 TO 0221 F A26A2...

Page 228: ...26A4C17 0160 3459 1 CAPACITOR FXD 02UF 20 100WVDC CER 28480 0160 3459 A26A4CR1 1901 0040 DIODE SWITCHING 30V 50MA 2NS DO 35 28480 1901 0040 A26A4CR2 1901 0040 DIODE SWITCHING 30V 50MA 2NS DO 35 28480 1901 0040 A26A4CR3 1901 0040 DIODE SWITCHING 30V 50MA 2NS DO 35 28480 1901 0040 A26A4CR4 1901 0040 DIODE SWITCHING 30V 50MA 2NS DO 35 28480 1901 0040 A26A4CR5 1901 0022 DIODE STABISTOR 10V 250MA 28480...

Page 229: ... 15 125W F TC 0 100 24546 C4 1 8 TO 51R1 F A26A4R38 0691 3153 RESISTOR 3 83K 1 125W F TC 0 100 16299 C4 1 8 TO 3831 F A26A4R39 0757 0280 RESISTOR 1K 1 125W F TC 0 100 24546 C4 1 8 TO 1001 F A26A4R40 0698 3437 1 RESISTOR 133 1 125W F TC 0 100 16299 C4 1 8 TO 133R F A26A4R41 0757 0465 6 RESISTOR 100K 1 125W F TC 0 100 24546 C4 1 8 TO 1003 F A26A4R42 0757 0465 RESISTOR 100K 1 125WF TC 0 100 24546 C4 ...

Page 230: ... 32 32 THD 12 THK 61 WD 28480 0590 1011 MP14 1400 0825 1 CLIP LED MTG 0 201 IN ID 0 330 IN 00 28480 1400 0825 MP15 1540 0034 1 CONTAINER PLASTIC POLYSTY 1 062LG 28480 1540 0034 MP16 08640 20163 1 CLAMP CAP 28480 08640 20163 MP17 3150 0203 1 FILTER CARTRIDGE EXP AL 3 6 W 6 L 28480 3150 0203 MP18 5001 0135 1 WRENCH COMB 28480 5001 0135 MP19 5060 0109 1 CGNNECTOR 15 CONTACTS 28480 5060 0109 MP20 0864...

Page 231: ... 143 953 1251 1313 1 CONTACT CONN FEM CRP 9D949 220 502 1251 3054 1 CONNIECTOR STRIP 9 OPEN POSITION 74868 221 68 Q1 1854 0063 4 TRANSISTOR NPN 2N3055 SI TO 3 PD 115W 28480 1854 0063 Q2 1854 0063 TRANSISTOR NPN 2N3055 SI TO 3 PD 115W 28480 1854 0063 Q3 1854 0250 1 TRANSISTOR NPN SI TO 3 PD 11SW 28480 1854 0250 Q4 1854 0063 TRANSISTOR NPN 2N3055 SI TO 3 PD 115W 28480 1854 0063 Q5 1854 0063 TRANSIST...

Page 232: ... 1 COVER TOP 28480 08640 00003 7 08640 00004 1 COVER BOTTOM 28480 08640 00004 8 5060 0222 2 HANDLE ASSY SH SIDE 28480 5060 0222 9 5060 8737 2 HANDLE RETAINER 28480 5060 8737 10 5060 0767 5 FOOT ASSY FM 28480 5060 0767 11 1490 0030 1 TILT STAND 28480 1490 0030 12 5000 0051 2 TRIM STRIP 28480 5000 0051 13 5060 8740 1 KIT RACK MOUNT SH MINT GRAY 28480 5060 8740 14 5000 8711 1 COVER FRONT SIDE PLATE M...

Page 233: ...R LK INTL T NG 7 16 439 N 110 78189 1922 04 J1MP4 2950 0132 1 NUT HEX DBL CHAM 7 16 28 THO 094 THK 73734 76500NP J1MP5 5040 0306 1 INSULATOR 28480 5040 0306 J1MP6 08555 20093 2 CENTER CONDUCTOR 28480 08555 20093 J1MP7 08555 20094 1 BCDY BULKHEAD 28480 08555 20094 J1MP8 08761 2027 1 INSULATOR 28480 08761 2027 Figure 6 2 Type N Connector See introduction to this section for ordering information 6 41...

Page 234: ...802 26654 VARADYNE INC SANTA MONICA CA 90403 26742 METHODE ELECTRONICS INC CHICAGO IL 6t656 27014 NATIONAL SEMICONDUCTOR CORP SANTA CLARA CA 95n5I 27264 MOLEX PRODUCTS CO DOWNERS GROVE IL 60515 28480 HEWLETT PACKARO CO CORPORATE HQ PALO ALTO CA 94304 28520 HEYMAN MFG CO KENILWORTH NJ 07033 3H768 SIEMENS CORP ISELIN NJ 08830 30983 MEPCO ELECTRA CORP SAN DIEGO CA 92121 32997 BOURNS INC TRIMPOT PROD ...

Page 235: ...ow MANUAL CHANGES supplement For additional important information about serial number coverage refer to INSTRUMENTS COVERED BY MANUAL in Section I Table 7 1 Manual Changes By Serial Number Serial Prefix or No Make Manual Changes Serial Prefix or No Make Manual Changes 1229A00120 and below N M L K J I H G F E 1405A 1 9 D C B A 1406A 1 10 1229A00121 to 00140 N M L K J I H G F E 1416A 1 11 D C B 1419...

Page 236: ...4R4 MP15 16 C R2 A4 entire sub assy D A4R2 J1 L1 3 C6 8 A10A1MP10 E A7 Assy A1 entire W1 12 Part No sub assy F A1C7 C9 A2C12 G A2L2 A2R48 H I A1 Part No A1C7 CR1 6 J MP2 4 A1Q3 R1 3 A2C27 30 K A2C5 L R13 21 28 M 37 40 45 54 57 65 A4R3 5 A2R6 8 N A4XDS1A 12 14 B 18 20 Instrument modification recommended see paragraph 7 7 7 2 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE ...

Page 237: ...nd Q4 and Q5 and Q12 Q3 A STD and Q3 and Q6 Opt 001 R7 14 A1Q1 R4 5 STD B R36 39 Opt 001 C R1 A1R16 17 MP59 D A4C10 MP60 A4R54 A2Q2 9 MP56 E A2U1 2 MP57 CR5 8 F CR13 16 R4 R6 M1 G MP20 22 A2CR9 H A4R13 15 22 41 42 I A4C14 R19 R27 R26 J R27 K R1 L MP6 9 R34 35 M Opt 001 N C6 Instrument modification recommended see paragraph 7 7 7 3 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 ...

Page 238: ...A10 A4R2 C8 A2C53 A2R55 56 58 1 2 A4R1 A2C54 3 R2 ALC17 24 4 32 52 67 5 MP41 A1C8 6 7 A2C31 8 VR2 A4 entire A2U14 9 assy A1CR4 5 A1C5 7 10 11 12 A1C17 52 13 14 A4R1 R6 Instrument modification recommended see paragraph 7 7 7 4 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 239: ...VR2 Q2 Q2 Q2 3 3 Q1 Q1 R6 A2CR5 6 4 R2 R6 R1 R2 A2K1 Opt 001 VR1 A4S1 5 A2CR9 13 6 A4CR7 9 MP17 A4R5 28 7 Opt 001 8 9 R2 Q4 Opt 001 10 U1 U1 2 R6 R28 11 U1 2 W16 VR6 12 A1 entire 13 sub assy 14 Instrument modification recommended see paragraph 7 7 7 5 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 240: ...4 17 Assy Part No MP8 18 13 MP17 20 C1 3 4 CR1 A2 Assy A2U5 19 R3 5 23 24 Part No A4C3 4 20 A4L1 2 21 22 23 A2C27 30 A2R28 58 24 A2 Assy Part No entire assy 25 26 27 MP47 48 A2R58 28 Instrument modification recommended see paragraph 7 7 7 6 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 241: ...fix MP1 F1 15 S2 16 17 18 MP8 19 C6 CR21 A4R34 35 Q1 R1 2 VR1 20 C24 A4CR7 9 MP72 Opt 001 13 A4R2 21 MP75 22 A2CR5 A3R1 23 24 25 A2R35 40 26 A4Q8 A4R44 54 27 C24 A4R2 Opt 001 A4R5 28 Instrument modification recommended see paragraph 7 7 7 7 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 242: ... A4 A5 A6 A7 A8 A9 A10 A1R5 6 Q1 29 A2C27 A2U6 30 A2U25 A2U1 31 MP14 32 A3R10 17 A2R38 39 33 A3U10 11 A3U13 17 R28 45 A2C4 12 32 34 A2R17 19 A2R58 62 Instrument modification recommended see paragraph 7 7 7 8 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 243: ... by Component 8 of 8 Change A11 A12 A13 A14 A17 A18 A20 A22 A26 No Prefix 29 30 31 R28 32 Opt 001 33 A1R21 22 34 Instrument modification recommended see paragraph 7 7 7 9 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 244: ... through 7 19 for recommended instrument modifications Page 5 11 paragraph 5 40 Change third sentence to read for 750 10 mVrms at A11TP5 740_______________760 mVrms Pages 6 13 through 6 15 Table 6 3 Change A8A2C11 and C12 to 0160 3466 CAPACITOR FXD 100 PF 10 Change A8A2C19 to 0140 0193 CAPACITOR FXD 82 PF 5 Delete A8A2C27 Delete A8A2L1 Add A8A2R46 0757 0416 RESISTOR FXD 511 OHM 1 05W Change A8A2R5...

Page 245: ...ernier is changed remove R4 and R5 from instrument Change voltage at Al11TP3 and TP5 to 2 1 0 1 V p p Service Sheet 13 schematic Change A26AlQ1 to 1853 0007 Service Sheet 17 schematic Add A2VR3 and A2VR4 in series with each other in parallel with A2R3 NOTE See paragraph 7 9 A2VR3 and VR4 should be removed from instrument Service Sheet 20 schematic Replace appropriate portion of schematic with atta...

Page 246: ...4R5 Step 7 Delete 24 Page 6 6 Table 6 3 Change A3R2 to 2100 3266 RESISTOR VAR CONT RREC 1K 5 Delete A3MP15 and MP16 Page 6 7 Table 6 3 Delete A3A4 entire sub assembly list and add the following A3A4R1 0757 0442 RESISTOR FXD 10 0K 1 1 8W A3A4R2 2100 3161 RESISTOR VAR 20K 10 TYPE P 3 4W A3A4R3 2100 3123 RESISTOR VAR 500 OHM 10 TYPE P 3 4W A3A4R4 0757 0280 RESISTOR FXD 1K 1 1 8W A3A4R5 2100 3154 RESI...

Page 247: ... Page 6 36 Table 6 3 Change A26A4C10 to 0170 0066 CAPACITOR FXD 0 027 UF 10 200 WVDC Page 6 37 Table 6 3 Delete A26A4R54 Page 6 40 Table 6 3 Delete MP59 and MP60 Service Sheet 12 schematic Delete A26A4R54 Change A26A4C10 to 0 027 UF Service Sheet 13 schematic Replace appropriate portion of schematic with attached partial schematic Figure 7 3 Service Sheet 14 schematic Add a ground symbol at the ju...

Page 248: ...lways 620 ohms in parallel with a resistor selected as follows 1 Set COUNTER MODE to EXT 0 10 MHz 2 Connect RF OUTPUT 10 dBm at 8 MHz to COUNTER INPUT 3 Connect a 10 ohm linear pot across A8AlR1 two test points beside U5 4 Counter should hold a stable count Decrease OUTPUT LEVEL vernier until counter just goes into random counting 5 Adjust pot for a stable count 6 Repeat steps 4 and 5 until the mi...

Page 249: ...UH 5 Page 6 13 Table 6 3 Delete A8A1 entire sub assembly and add the following A8A1 08640 60038 COUNTER LOCK ASSY A8A1C1 0180 0197 C FXD ELECT 2 2 UF 10 20VDCW A8A1C2 0180 0197 C FXD ELECT 2 2 UF 10 20 VDCW A8A1C3 0160 3879 C FXD CER 0 01 UF 20 100 VDCW A8A1C4 0160 3879 C FXD CER 0 01 UF 20 100 VDCW A8A1CR1 1901 0050 DIODE SI 200 MA AT 1V A8A1CR2 1901 0050 DIODE SI 200 MA AT 1V A8A1CR3 1901 0050 D...

Page 250: ...APACITOR FXD 150 PF 5 Add A9C7 CAPACITOR FXD 750 PF 5 Add A9C8 CAPACITOR FXD 1500 PF 5 Page 6 18 Table 6 3 Delete A9W1 Page 6 20 Table 6 3 Change A1OAlMP10 to 08640 40050 Delete A1OAIMP12 Page 6 35 Table 6 3 Change A26A2Q2 Q5 and Q6 to 1854 0071 TRANSISTOR NPN SI PD 300 MW FT 200 MHZ Change A26A2Q7 to 1854 0023 TRANSISTOR NPN SI PD 360 MW FT 15 MHZ Change A26A2Q3 Q4 Q8 and Q9 to 1853 0020 TRANSIST...

Page 251: ...6A2U1 to 1820 0398 Change A26A2U2 to 1820 0370 Change the pin configuration on the symbol and drawing for A26A2U1 shown in Figure 7 4 Figure 7 4 A26A2U1 Backdating Change E Service Sheet 14 schematic Change A26A2Q2 Q5 and Q6 to 1854 0071 Change A26A2Q3 to 1853 0020 Service Sheet 18 schematic Delete A8A1C3 Change the following reference designators A8A1R8 to A8A1R3 A8AIR9 to A8A1R5 A8AIR10 to A8A1R...

Page 252: ...ating Change E CHANGE F Page 6 13 Table 6 3 Delete A8A1C7 Service Sheet 18 schematic Delete A8A1C7 Service Sheet 22 schematic Replace appropriate portion of schematic with attached partial schematic Figure 7 6 7 18 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 253: ... 19 Tl P 0 Al7 PWR SUP MOTHER BD ASSY 08640 600 l I PIO I XA12 9 I II I r _j 16 15 12 11 14 13 Al2 RECTIFIER ASSY 08640 600031 1 l INPUT cROWBAR CR3 CR4 CR7 CR8 CRll CR12 CRIS CRI6 CR19 R3 21 SK R4 lOK RS OK R6 OK R7 OK 6 10 9 8 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 254: ...ematic Delete A5C9 Service Sheet 20 schematic Change A8A2C12 to 470 pF Delete A8A2L2 and in its place add A8A2R48 196 ohms CHANGE H NOTE See paragraph 7 44 for recommended instrument modification Page 6 34 Table 6 3 Change A26A2CR9 to 1910 0022 DIODE GE 5W1V Page 6 37 Table 6 3 Change A26A4R13 and R15 to 0757 0199 RESISTOR FXD 21 5K 1 1 8W Change A26A4R22 to 0757 1093 RESISTOR FXD 3K 1 1 8W Change...

Page 255: ... mA at 1V Delete A8AiMP2 4 Add A8A1Q3 1854 0071 TRANSISTOR NPN SI PD 300 MW FT 200 MHZ Change A8AlR1 to 0698 6648 RESISTOR FXD 620 OHM 5 1 8W Add A8A1R2 0698 5103 RESISTOR FXD 430 OHM 5 1 8W Add A8A1R3 0698 7248 RESISTOR FXD 3 16K 2 1 8W Page 6 14 Table 6 3 Change A8A2C27 to 0160 3877 CAPACITOR FXD 100 PF 20 200 WVDC Delete A8A2C28 C29 and C30 Page 6 30 Table 6 3 Delete A18R19 Page 6 31 Table 6 3 ...

Page 256: ...ph 7 52 for recommended instrument modification Page 6 21 Table 6 3 Add A10OA2C5 0160 3456 CAPACITOR FXD 1000 PF 10 250 WVDC Service Sheet 11 schematic Add A10OA2C5 between the collector of A10A2Q3 and ground CHANGE L Pages 6 38 and 6 39 Table 6 3 R1 and AUDIO OUTPUT LEVEL knob changed See paragraph 7 54 for recommended instrument modification 7 22 Artisan Technology Group Quality Instrumentation ...

Page 257: ... 6 81K OHM 1 1 8W A7R45 0698 3156 R FXD MET FLM 14 7K OHM 1 1 8W A7R46 0757 0441 R FXD MET FLM 8 25K OHM 1 1 8W A7R47 0757 0440 R FXD MET FLM 7 50K OHM 1 1 8W A7R48 0757 0439 R FXD MET FLM 6 81K OHM 1 1 8W A7R49 0757 0290 R FXD MET FLM 6 19K OHM 1 1 8W A7R50 0757 0200 R FXD MET FLM 5 62K OHM 1 1 8W A7R51 0757 0438 R FXD MET FLM 5 11K OHM 1 1 8W A7R52 0698 3155 R FXD MET FLM 4 64K OHM 1 1 8W A7R53 ...

Page 258: ...A7R63 61 9Ω A7R28 6810Ω A7R40 6810Ω A7R53 5620Ω A7R64 56 2Ω A7R65 51 1Ω Service Sheet 9A schematic Change AllR34 to 5110Q2 Change AllR35 to 1000Q2 CHANGE N NOTE See paragraph 7 56 for recommended instrument modification Page 5 2 Table 5 1 Delete A10OA2R6 8 R12 14 and R18 20 Pages 5 2 and 5 3 paragraph 5 21 Delete sections b and c A10OA2R6 8 R12 14 and R18 20 Page 6 17 Table 6 3 Change A8A4R3 to 07...

Page 259: ... 20 VDC TA Page 6 23 Table 6 3 Change A10A2R55 to 0698 0085 RESISTOR FXD 2 61K 1 125W F TUBULAR Delete A10A2R56 Change A10A2R58 to 06983454 RESISTOR FXD 215K 1 125W F TUBULAR Service Sheet 6 schematic Add A9C8 270 pF with asterisk parallel to R22 between R21 and ground Service Sheet 11 schematic Add A10A2C53 2 2pF from U1 pin 3 to ground with the positive electrode at pin 3 Change A10A2R55 to 2610...

Page 260: ...6 to 0757 0472 RESISTOR FXD 200K 1 0 125W F TUBULAR Page 6 28 Table 6 3 Change A12 to 08640 60190 Delete A12Q1 A12R1 2 and A12VR1 Add A13R6 0698 4014 RESISTOR FXD 787 OHM 1 0 125W F Page 6 34 Table 6 3 Delete A26A2CR6 Delete A26A2K1 Service Sheet 6 schematic Delete A9R2 and associated 94 wire Add A13R6 787 ohm between pin 28 to A9J1 and ground Service Sheet 9A schematic Change AllQ1 to 1853 0050 C...

Page 261: ...onnect RF OUTPUT to COUNTER INPUT 3 Turn FREQUENCY TUNE cw and observe frequency increase towards 550 MHz on the counter 4 Repeat step 3 for OUTPUT LEVEL settings of 0 dBm and 7 dBm If count becomes erratic or displays zero count as frequency approaches 550 MHz add capacitor between pins 13 and 16 of A8AlU1 Page 5 2 Table 5 1 Add the following Service Range of Component Sheet Values Basis of Selec...

Page 262: ...11MP17 08640 00081 INSULATOR VAR AUD OSC Page 6 36 Table 6 3 Change A26A4R5 to 0757 0290 RESISTOR FXD 6 19K 1 0 125 W F TUBULAR Page 6 37 Table 6 3 Change A26A4R28 to 0698 3154 RESISTOR FXD 4 22K 1 0 125 W F TUBULAR Service Sheet 12 schematic Change A26A4R5 to 6190 ohms Change A26A4R28 to 4220 ohms Service Sheet 21 schematic Add A8A2C31 1000 pF between TP6 and ground CHANGE 8 Page 6 6 Table 6 3 Ch...

Page 263: ...nge the part number for the A3A4 sub assembly to 08640 60196 Service Sheet 6 Principles of Operation Input and Buffer Circuits A5 Change the seventh sentence to read as follows The gain compensation adjustment potentiometers A3A4R2 R3 and R4 set the FM sensitivity at the frequency mid point and extremes Service Sheet 6 Troubleshooting Delete FM Gain Compensation A3A4 Circuit Service Sheet 6 schema...

Page 264: ...the following 2 The frequency counter should read 400 8 Hz on a standard instrument 400 12 Hz on an Option 001 The voltmeter should read greater than 1 Vrms on a standard instrument 3 Vrms on an Option 001 Standard 392 __________ 408 Hz 1 0 Vrms __________ Option 001 388 __________ 412 Hz 3 0 Vrms __________ 3 Set MODULATION FREQUENCY to 1 kHz fixed The frequency counter should read 1000 20 Hz on ...

Page 265: ...NSISTOR PNP SI CHIP PD 1W FT 15 MHz Service Sheet 9A schematic Change A11R2 to 196 kΩ Service Sheet 18 Principles of Operation Comparator A8A1 Change the second sentence to read as follows In the EXT counter mode the external input couples into U5 through relay K2 and a diode network CR2 5 which protects U5 from large voltages Service Sheet 18 component locations Replace Figure 8 55 with the attac...

Page 266: ...paragraphs 7 85 through 7 89 for recommended instrument modification Page 6 30 Table 6 3 Change A18U1 to 1826 0177 Page 6 31 Table 6 3 Change A20U1 2 to 1826 0177 Change A22 to 08640 60177 Page 6 32 Table 6 3 Change A22R6 to 0757 0438 RESISTOR FXD 5 11K 1 0 125W F TUBULAR Add A22R28 0757 0278 RESISTOR FXD 1 78K 1 0 125W F TUBULAR Change A22U1 2 to 1826 0177 Add A22VR6 1902 0761 DIODE ZENER 6 2V VZ...

Page 267: ... Sheet 22 component locations Replace Figure 8 68 with the attached figure A22 Figure 8 68 A22 20V and 20V Regulator Assembly Component Locations P O Change 11 Service Sheet 22 schematic Change the part number for A22 to 08640 60177 2 places Change the part number for the voltage regulator Note 1 to 1826 0177 Replace the appropriate portions of schematic with the following partial schematics 7 33 ...

Page 268: ...Schematic Diagram P O Change 11 1 of 2 7 34 Wl Jl A B C D E F PI r f f f f f 1 1 I t t t J t J IOOV I I I t t 1 120V I A I C I D F I I PC 1 u t J 220V 1 BOARD I U U JJ L_ _ _ _ _ _ _ _ _ _ _ _ _ _J Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 269: ...A26A1 subassembly parts list with the following list A26A1 08640 60043 POWER AMPLIFIER AND AGC DETECTOR ASSY A26A1C1 0160 3094 CAPACITOR FXD 1 UF 10 100 WVDC A26A1C2 0160 3094 CAPACITOR FXD 1 UF 10 100 WVDC A26A1C3 0160 3094 CAPACITOR FXD 1 UF 10 100 WVDC A26A1C4 0140 0198 CAPACITOR FXD 200 PF 5 300 WVDC A26A1C5 0160 2204 CAPACITOR FXD 100 PF 5 300 WVDC A26A1C6 0180 0197 CAPACITOR FXD 2 2 UF 10 20...

Page 270: ...AR A26A1R8 0698 3443 RESISTOR FXD 287 OHM 1 125W F A26A1R9 0757 0199 RESISTOR FXD 21 5K 1 125W F TUBULAR A26A1R10 0757 0199 RESISTOR FXD 21 5K 1 125W F TUBULAR A26A1R11 0757 0458 RESISTOR FXD 51 1K 1 125W F TUBULAR A26A1R12 0683 3355 RESISTOR FXD 3 3M 5 25W CC TUBULAR A26A1R13 0698 3450 RESISTOR FXD 42 2K 1 125W F TUBULAR A26A1R14 0698 3450 RESISTOR FXD 42 2K 1 125W F TUBULAR A26A1R15 0683 1055 RE...

Page 271: ...y bands but limits the AM bandwidth Capacitor C4 is also switched in for the 0 5 1 and 1 2 MHz or LO BAND 1 ranges by Q6 In the pulse modulation mode Q5 Q8 and Q9 are switched on This switches out C4 and C5 and switches C6 in Switching of Q5 9 is multiplexed onto one line by transistors A26A2Q8 and Q9 A26A2Q8 is a switchable current source In LOW BAND 2 it generates just enough current to turn on ...

Page 272: ...or 100 ms or longer if U3B is retriggered by U3A and turns on Q7 which disables the meter drive amplifier output and the meter reads zero Thus the meter is turned off for low rate pulses When not in the pulse modulation mode the output of inverter U2B is low the output of U2C is high and A26A1Q4 and Q3 are held on the output of U2D is high and the modulator is held in its normal on mode and Q7 is ...

Page 273: ... attached figure A26A1 Figure 8 43 A26A1 Power Amplifier and AGC Detector Assembly Component Locations P O Change 13 Service Sheet 13 schematic Replace appropriate portion of schematic with the attached partial schematic 7 39 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 274: ... 601 14 7 P CHANGE 13 Cont d P O Figure 8 45 RF Amplifier Pulse Switching and Step Attenuator Schematic Diagram P O Change 13 7 40 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 275: ...te to Restabilization Time After 1 min in RF OFF Mode to read These specifications apply only if the RF ON OFF switch has been wired to turn the RF Oscillator off Pages 4 5 and 4 6 paragraph 4 13 Under SPECIFICATION add a footnote to Restabilization Time normal mode after 1 min in RF OFF mode to read This specification applies only if the RF ON OFF switch has been wired to turn the RF Oscillator o...

Page 276: ...or Board Assembly A3A4 and remove the board The board is located directly behind RANGE switch cam housing 3 Remove the jumper wire between the two holes labeled RF OSC ON OFF INHIBIT 4 Reinstall board and bottom cover 5 Check RF ON OFF operation by observing the counter or Auxiliary RF Output which should stop operating with RF ON OFF switched to OFF Service Sheet 15 Principles of Operation Change...

Page 277: ...t Number New Assy 08640 60099 Page 6 6 Table 6 3 Change A3 08640 60100 to A3 08640 60099 Change A3MP8 to 0510 0015 Change A3MP13 to 08640 20193 Add A3MP17 08640 60206 FINE TUNE ASSEMBLY Add A3MP18 08640 00085 GASKET RFI Add A3MP19 08640 00086 LABEL Add A3MP20 2200 0151 SCREWS PAN HEAD 4 40 x 0 75 INCH Page 6 38 Table 6 3 Change MP8 to 0370 2623 CHANGE 19 Page 6 2 Table 6 1 Change A8A2 as follows P...

Page 278: ... A12R1 and A12R2 0698 3447 RESISTOR 422 OHM 1 0 125W F TUBULAR Add A12VR1 1902 3393 DIODE ZNR 75V 5 DO 7 PD 0 4W TC 0 077 Page 6 37 Table 6 3 Change A26A4R34 and R35 to 0683 1055 RESISTOR 1M 5 0 25W CC TUBULAR Service Sheet 11 schematic Change part number for A10A2U5 to 1820 0143 Service Sheet 12 schematic Change A26A4R34 and R35 to 1MQ Service Sheet 17 component locations Replace Figure 8 52 with...

Page 279: ...e portions of schematic with the attached partial schematics P O Figure 8 54 Meter Circuits Schematic Diagram P O Change 19 1 of 2 P O Figure 8 54 Meter Circuits Schematic Diagram P O Change 19 2 of 2 7 45 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 280: ... Figure 8 61 with attached figure Figure 8 61 P O A8A2 Counter Loch Board Assembly Component Locations P O Change 19 Service Sheet 20 schematic Change part number for A8A2 subassembly to 08640 60189 7 46 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 281: ...A14 to read as follows The A12 Rectifier Assembly contains five full wave rectifiers and a crowbar to protect the instrument from excessively high line voltages The crowbar is across the output of the rectifier bridge to the 44 6V regulator If the rectified voltage exceeds 75V breakdown diode A12VR1 conducts and triggers the gate of SCR A12Q1 Q1 then conducts and blows the primary fuse Diode A12CR...

Page 282: ...igure 8 66 A12 Rectifier Assembly Component Locations P O Change 19 Service Sheet 22 schematic Replace appropriate portion of schematic with the attached partial schematic P O Figure 8 69 Power Supply Circuits Schematic Diagram P O Change 19 7 48 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 283: ...le 6 3 Change A26A4CR7 CR8 CR9 and CR13 to 1901 0518 DIODE SCHOTTKY HOT CARRIER Page 6 36 Table 6 3 Change A26A4R2 to 2100 2489 RESISTOR VAR 5000 OHM 10 Page 6 39 Table 6 3 Add MP7 2 7120 4294 LABEL WARNING Service Sheet 5 component locations Replace Figure 8 20 with the attached figure P O A3A4 Figure 8 20 P O A3A4 Connector Board Assembly Component Locations P O Change 20 7 49 Artisan Technology...

Page 284: ...e 8 21 RF Oscillator Simplified Diagram P O Change 20 7 50 P 0 A3 RF OSCILLATOR ASSY 1086 1 600991_____ IPIO A3A4 c ECTOR BOARD ASSY 086 1 601961 I u I 3 mH 10 967 I RF osc I ON OFF INHIBIT RF ON OFF VARACTOR CATHODE VARACTOR 9 o M AN O OE 8 t 12 L2 3 mH zov 5 2V zov Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 285: ... Service Sheet 12 schematic Change A26A4R2 to 5000w CHANGE 21 Page 6 39 Table 6 3 Add MP75 08640 00096 INSULATOR COUNTER HEAT SINK CHANGE 22 Page 6 34 Table 6 3 Delete A26A2CR5 Service Sheet 13 schematic Delete diode A26A2CR5 Connect pin 10 directly to pin 19 CHANGE 23 Page 6 36 Table 6 3 Change A26A3R1 to 0698 7227 RESISTOR FXD 422 OHM 1 0 125W F Service Sheet 12 schematic Change A26A3R1 to 4222 ...

Page 286: ...or s controls as follows COUNTER MODE LOCK Off 2 Connect one lead of the voltmeter to testpoint A8A2TP6 and the other lead to ground Adjust potentiometer A8A2R58 for a voltmeter reading of 11 5 1 OVdc Page 6 2 Table 6 1 Change A8A2 as follows Part Number New Assy 08640 60258 Page 6 13 Table 6 3 Change A8A2 08640 60189 to 08640 60258 Page 6 14 Table 6 3 Delete A8A2C27 C28 C29 and C30 Change A8A2R28...

Page 287: ...rd Assembly Component Locations P O Change 24 Service Sheet 20 schematic Change part number of A8A2 subassembly to 08640 60258 Replace appropriate portion of Figure 8 62 with attached partial schematic 7 53 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 288: ...01 14 7 P CHANGE 24 cont d P O Figure 8 62 Up Down Counter and Display Schematic Diagram P O Change 24 7 54 Cl3 300 R47 511 COUN1 K S Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 289: ...k Board Assembly Component Locations P O Change 24 Service Sheet 21 schematic Change part number of A8A2 subassembly to 08640 60258 Replace appropriate portion of Figure 8 64 with attached partial schematic P O Figure 8 64 Counter Phase Lock Schematic Diagram P O Change 24 7 55 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 290: ...9C8 see Change 1 Add the following Service Range of Basis of Selection Component Sheet Values A9A1A2C6 6 0 56 pF A9A1A2C7 6 500 900 pF See paragraph 5 21 A9A1A2C8 6 750 2000 pF Page 6 17 and 6 18 Table 6 3 Replace the entire A9 assembly parts list with the following list A9 PEAK DEVIATION AND RANGE SWITCH ASSEMBLY A9A1 08640 60179 SWITCH ASSEMBLY A9A1MP1 0380 0013 SPACER 1 0 LONG A9A1MP2 0380 0013...

Page 291: ...0520 0173 SCREW 2 56 x 0 25 W LOCK A9A1MP36 2360 0135 SCREW 6 32 x 1 50 A9A1MP37 2200 0107 SCREW 4 40 x 0 312 W LOCK A9A1MP38 2360 0129 SCREW 6 32 x 1 000 LG A9A1MP39 2190 0006 WASHER SPLIT LOCK A9A1MP40 2950 0006 NUT 1 4 32 A9A1MP41 2190 0027 WASHER LOCK INT STAR A9A1R1 2100 3435 RESISTOR VAR 2 5K OHM A9A1W1 08640 60197 CABLE ASSEMBLY OOAX A9A1A1 08640 60253 PEAK DEVIATION BAND SWITCH BOARD ASSEM...

Page 292: ...STOR FXD 511 OHM A9A1A2R5 0698 0082 RESISTOR FXD 464 OHM A9A1A2R6 0757 0280 RESISTOR FXD 1K OHM A9A1A2R7 0698 7799 RESISTOR FXD 2K OHM A9A1A2R8 0698 5669 RESISTOR FXD 1 5K OHM A9A1A2R9 0698 8212 RESISTOR FXD 6K OHM A9A1A2R10 0698 5669 RESISTOR FXD 1 5K OHM A9A1A2R11 0698 8213 RESISTOR FXD 3K OHM A9A1A2R12 0698 5669 RESISTOR FXD 1 5K OHM A9A1A2R13 0698 8213 RESISTOR FXD 3K OHM A9A1A2R14 0757 0280 R...

Page 293: ...ic with attached partial schematics P O Figure 8 25 1 of 2 and 2 of 2 Service Sheet 7 schematic Replace appropriate portion of schematic with attached partial schematic P O Figure 8 27 Service Sheet 8 component locations Replace Figure 8 29 1 of 2 and 2 of 2 with the attached Figures 8 29A and 8 29B Service Sheet 8 schematic Replace appropriate portion of schematic with attached partial schematic ...

Page 294: ...935 601 14 7 P CHANGE 25 Cont d A9A1A2 Figure 8 23A A9A1A2 FM Gain Switch Board Assembly Component Locations P O Change 25 7 60 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 295: ...TM 9 4935 601 14 7 P CHANGE 25 Cont d A9A2 Figure 8 23B A9A2 Interconnect Assembly Component Locations P O Change 25 7 61 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 296: ...Model 8640B TM 9 4935 601 14 7 P Figure 8 25 FM Amplifiers Schematic Diagram 1 of 2 P O Change 25 7 62 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 297: ...0 1 6 dBI 1 12 dBI 1 18 dBI 1 24 dB PEAK RANGE l zl DEVIATION 0 5 I 2 4 8 16 32 64 128 256 Sl2 TO TO TO TO TO TO TO TO TO TO TO l 2 4 8 16 32 64 128 256 512 1024 5 12 MHZ 24 2 56 MHz 24 18 1 28 MHz cf 24 18 12 640kHZ 24 18 12 6 320 kHZ 24 18 12 6 0 IIIJ kHz 24 18 12 6 0 6 kHz 40kHz 20kHz 24 10kHz 24 18 5kHz 24 18 12 7 GAIN c8 1500 NON FUNCTIONING LINE 24 18 12 6 24 18 12 6 0 0 6 6 12 12 18 I I I 1...

Page 298: ...935 601 14 7 P Change 25 Cont d Figure 8 27 FM Shaping Circuits and Phase Lock Loop Filter Schematic Diagram P O Change 25 7 64 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 299: ...1 14 7 P CHANGE 25 Cont d A9A1A1 Figure 8 29A A9A1AI Peak Deviation Band Switch Board Assembly Component Locations P O Change 25 7 65 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 300: ...TM 9 4935 601 14 7 P CHANGE 25 Cont d A9A2 Figure 8 29B A9A2 Interconnect Assembly Component Locations P O Change 25 7 66 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 301: ... Model 8640B CHANGE 25 Cont d Figure 8 31 Over Deviation Detector and Meter Control Circuits Schematic Diagram P O Change 25 7 67 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 302: ...7 P Model 8640B CHANGE 25 Cont d P O Figure 8 48 AM Interconnections and RF ON OFF Switch Schematic Diagram P O Change 25 7 68 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 303: ...4935 601 14 7 P Model 8640B CHANGE 25 Cont d P O Figure 8 59 Counter Time Base Schematic Diagram P O Change 25 7 69 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 304: ...Model 8640B CHANGE 25 Cont d Figure 8 78 A9A1 Switch Assembly Illustrated Parts Breakdown P O Change 25 7 70 978 JUMP ro p C ISO RO Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 305: ...PEAK DEVIATION and RANGE switches four positions ccw from full cw 2 Place instrument upside down and remove bottom cover see Service Sheet F 3 Disconnect gray coaxial cable A9AlW1 from A7 FM Shaper Assembly 4 Disconnect A9A2 Interconnect Assembly from switch 5 Loosen two setscrews on coupler at the RANGE switch shaft Do not disturb coupler at the A10 Divider Filter Assembly shaft 6 Remove PEAK DEV...

Page 306: ...cillator Option 001 In the Frequency specification change 10 to 15 In the Total Harmonic Distortion specification change 600 kHz to 200 kHz and add the following 2 0 200 kHz to 600 kHz Pages 4 11 thru 4 13 paragraph 4 17 Under SPECIFICATIONS make the following changes Delete 35 dB below fundamental of 0 5 to 128 MHz Change 128 to 512 MHz to 0 5 to 512 MHz Change 35 dB to 30 dB in steps 2 3 two pla...

Page 307: ...A26A4R2 to 2100 2522 RESISTOR VAR TRMR 10 K OHM 10 C Change A26A4R5 to 0698 0084 RESISTOR FXD 2 15 K OHM 1 0 125W F TC O 100 Service Sheet 9A schematic Change AllC24 to 30 pF CHANGE 28 Page 6 13 Table 6 3 Add A8MP47 08640 00100 INSULATOR RF SCALER Add A8MP48 08640 00102 INSULATOR COUNTER TIME BASE Page 6 23 Table 6 3 Change A10A2R58 to 0698 3243 RESISTOR FXD 178K 1 0 125W F TUBULAR Service Sheet 1...

Page 308: ...ollows 12 If level at A11TP4 is too high adjust AllR28 ccw reduce resistance if level is too low adjust AllR28 cw increase resistance Then repeat steps 8 through 11 Add the following steps after step 16 16a Set MODULATION FREQUENCY controls to 600 kHz Connect distortion analyzer to front panel AM OUTPUT connector Calibrate distortion analyzer and measure distortion Distortion analyzer should indic...

Page 309: ...tors A10A2R38 and R39 Service Sheet 19 schematic Make the following changes to the A8A3 assembly Change R10 and R17 to 1960 ohms Change part numbers for U10 U11 U16 and U17 to 1820 1490 Change part numbers for U13 U14 and U15 to 1820 1429 NOTE In instruments with serial number prefix 1545A or below if A8A3U16 or U17 is replaced with 1820 1490 the respective pull up resistor A8A3R10 or R17 must als...

Page 310: ...hange A7R45 to 26 1K NOTE For instruments with serial prefixes below 1552A the recommended replacement for A7R28 is 0757 0465 and for A7R45 is 06983159 For instruments not already modified as above it will be necessary to replace both A7R28 and A7R45 the first time that either resistor is replaced Service Sheet 20 Component Locations Replace Figure 8 61 with attached figure P O A8A2 ASSEMBLY Figur...

Page 311: ...re 8 63 P O A8A2 Counter Lock Board Assembly Component Locations P O Change 34 Service Sheet 21 Schematic Replace appropriate portion of schematic with attached partial schematic P O Figure 8 64 Counter Phase Lock Circuits Schematic Diagram P O Change 34 7 77 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 312: ...A8A4 Assemblies see Service Sheet B for procedures 2 Replace A8A2R57 on A8A2 Counter Lock Board Assembly with part number 08640 60027 with a 0 47 ohm resistor HP 0811 1662 The existing value is 0 82 ohms R57 is the current limiting resistor for the display LED s from the 5 2 volt supply 3 On A8A4 Counter Display Assembly with part number 08640 60025 unsolder and discard A8A4R4 a 220 ohm 2 watt res...

Page 313: ...9 4935 601 14 7 P Model 8640B INSTRUMENT MODIFICATIONS Figure 7 8 A8A4 Counter Display Assembly Modification 7 79 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 314: ...can be reduced by adding RFI barriers to the main and fine tune shafts and the output attenuator shaft The following parts are required Qty Description HP Part No 2 4 40x1 8 Setscrew 3030 0007 1 Braid Ring Main Tune 8160 0238 1 Braid Ring Fine Tune 8160 0239 1 Retaining Collar 08640 20228 1 Attenuator Shield 08640 00065 Order only for serial prefixes 1229A and below 7 22 Remove A3 RF Oscillator As...

Page 315: ...al number prefix 1246A and below a new replacement A7 Assembly will require modification to be compatible with an A9 Peak Deviation and Range Switch Assembly that does not have coaxial cable A9W1 see paragraph 7 32 The new A7 Assembly will have coaxial jack A7J1 see Service Sheets 6 and 7 the original assembly does not 7 30 Refer to Figure 7 9 and Service Sheet 7 Modify the board as follows 1 Add ...

Page 316: ...B INSTRUMENT MODIFICATIONS Figure 7 9 A 7 FM Shaping Assembly Modification Figure 7 10 A 9 Peak Deviation and Range Switch Modification 7 82 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 317: ...provement Serial Prefix 1251A and Below 7 39 On instruments with serial number prefix 1251A and below and an A5 Assembly with an 08640 60029 part number spurious oscillations may occur in the FM system in the FM OFF mode To prevent this refer to Service Sheet 6 and add C9 430 pF HP 0160 0939 from pin 7 on the circuit board connector to circuit board ground 7 40 A8A2 Counter Lock Board Assembly Imp...

Page 318: ...ction V The offset adjustments may be omitted 12 Perform the Output Level Knob Adjustment procedure in Section V the gears however should not need adjustment 13 Install the covers trim strip and front window 7 44 A26 AM AGC and RF Amplifier Assembly Improvement Serial Prefix 1303A and Below 7 45 On instruments with serial number prefix 1303A and below operation of the AM and pulse modulation circu...

Page 319: ... marked on cover Note that the two center screws are longer than the others 3 Remove cover from casting 4 Remove 12 4 40 pan head screws that secure A1OA2 RF Divider Assembly Remove A10OA2 and riser board A10OA3 by lifting at the riser 5 Solder a 1 2 inch length of insulated wire between pin 3 of U18 and the end of R16 5 11 kΩ that is nearest U18 Refer to Figure 7 11 6 Replace A10OA2 and A10OA3 an...

Page 320: ...or adjustment in Section V 7 56 A8A4 Counter Display Assembly Improvement Serial Prefixes 1323A and Below 7 57 On instruments with serial number prefix 1323A and below and an A8A4 Assembly with an 08640 60025 part number if the time base UNCAL lamp burns out the time base will not be calibrated To prevent this refer to Service Sheet 20 and add R5 46 4 kS2 HP 0698 7276 across the leads of UNCAL lam...

Page 321: ...ont 08640 40049 7 69 Replacement of the pot is straightforward To gain access to the part remove the A8A2 assembly as described in Service Sheet B 7 70 A11 Variable Frequency Modulation Oscillator Improvements Serial Number Prefixes 1339A and Below 7 71 Distortion in the Variable Frequency Modulation Oscillator Option 001 at high frequencies can be reduced by changing AllQ1 Refer to Service Sheet ...

Page 322: ...y to the tuning capacitor behind the plastic gear A11A1MP3 and small spur gear A11AMP2 NOTE If there is insufficient clearance for the insulator between gears and capacitor perform step e e Remove back cover from the oscillator Then loosen three nylon screws which secure the tuning capacitor to the PC board This will allow a small amount of shift in the capacitor s position and afford clearance fo...

Page 323: ...reen 05 wire is also attached j Insert power cord and check instrument for proper line switch operation k Reinstall covers 7 88 Reduction in Popcorn Noise on Power Supplies Serial Number Prefixes 1406A and Below 7 89 Excessive popcorn noise i e random voltage shifts on the order of 1 mV can be reduced by changing the IC regulator A18U1 A20U1 and U2 A22U1 and U2 to HP 1826 0177 The noise can cause ...

Page 324: ...uit has R54 825 ohm collector resistor for Q8 carefully unsolder it d Remove R44 42 2K e Solder the 825 ohm resistor in place of R44 The HP Part Number is 0757 0421 f Check operation by increasing the CW RF output level above 19 dBm The REDUCE PEAK POWER lamp should light at a level between 19 and 22 dBm 7 90 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg c...

Page 325: ...agram Notes explains any unusual symbols that appear on the schematics The table also explains the switch wafer numbering system 8 8 TROUBLESHOOTING 8 9 This manual provides two methods to isolate a problem to a particular assembly The first method is to use the results of the performance tests given in Section IV and the table of Post Repair Performance Tests and Adjustments found in Section V Mo...

Page 326: ... board is supplied with the generator that can be used to extend all circuit boards except the A10OA2 RF Divider Assembly and the A12 Rectifier Assembly that are not accessible by removing a casting cover The RF Divider Assembly is self extending just remove the riser board and insert the RF Divider Assembly into the riser s slot Figure 8 1 shows the extender board in use and the RF Divider Assemb...

Page 327: ... within the tolerances specified in Table 5 1 until the desired result is obtained 8 26 Etched Circuits 8 27 The etched circuit boards in the Signal Generator are of the plated through type consisting of metallic conductors bonded to both sides of insulating material The metallic conductors are extended through the component mounting holes by a plating process Soldering can be done from either sid...

Page 328: ... area before application of Must not dissolve etched circuit base board Freon Acetone Lacquer Thinner protective coating Solder Component replacement Circuit board repair Wiring Resin flux core high tin content 60 40 tin lead 18 gauge SWG preferred Protective Contamination corrosion protection Good electrical insulation corrosion prevention properties Silicone Resin such as GE DRI FILM 88 For work...

Page 329: ...410B Vacuum Tube Voltmeter the ohms lead is negative with respect to the common for the HP Model 412A DC Vacuum Tube Voltmeter the ohms lead is positive with respect to the common When the ohmmeter indicates the least diode resistance the cathode of the diode is connected to the ohmmeter lead which is negative with respect to the other lead NOTE Replacement instructions are the same as those liste...

Page 330: ...ally high going edge sensitive unless there is a circle at the input which would make them low going All other inputs are usually level sensitive Table 8 2 Logic Levels Logic Voltage Levels LOGIC TTL ECL EECL High 1 2V 0 5V 0 1 Low 0 O SV 5V 6V more negative than more positive than Input Conditioning INPUT TTL ECL EECL Grounded Low 0 High 1 High 1 Open High 1 Low 0 Low 0 Ground OV Figure 8 3 Binar...

Page 331: ...tion occurs at the T input 8 47 The set S and clear CLR inputs override all other input conditions when set is low the Q output is forced high when clear is low the Q output is forced low Although normally the Q output is the compliment of the Q output simultaneous low inputs at S and CLR will force both Q and Q high on some D flip flops 8 48 Schmitt Trigger A typical Schmitt Trigger is shown in F...

Page 332: ...sters 8 53 Binary Latch 8 54 The four bit binary register shown in Figure 8 9 is used as a storage latch Information at the data Dn inputs is transferred to the respective Qn outputs when the enable EN input is low When the enable goes high the outputs are latched and are no longer affected by the data inputs Figure 8 8 Multiple Input J K Flip Flop 8 55 When enabled any output may be set to a high...

Page 333: ...ck Similarly the two ANDed set or reset to nine R9 inputs set the outputs to the nine count If all reset to zero and reset to nine inputs are simultaneously high the reset to nine overrides the reset to zero 8 63 Programmable Counter The programmable decade counter shown in Figure 8 12 operates similarly to the basic decade counter when the load LD input is high The counter shown has only a single...

Page 334: ...EAR OA Go DATA OUTPUT T TC TERMINAL COUNT GA Gs Gc Go 9 COUNT AND CE CLR BINARY STATE DIAGRAM 0 1 f 2 r 3 f 4 10 r 11 13 15 r 14 12 9 f4 8 f 7 14 6 1 5 COUNT Do De QB QA COUNT Go oc QB QA 0 0 0 0 0 5 0 1 o 1 1 0 0 0 1 6 0 1 1 0 2 0 0 1 0 7 0 1 1 1 3 0 0 1 1 8 1 0 0 0 4 0 1 0 0 9 1 0 0 1 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 335: ...R1 Circuit D shows typical circuit connections and parameters It is assumed that the amplifier has high gain low output impedance and high input impedance 8 71 An operational amplifier can be characterized as an ideal voltage amplifier having low output impedance high input impedance and very high gain Also the output voltage is proportional to the difference in the voltages applied to the two inp...

Page 336: ...n carry zero one and two 4 Count down to one zero borrow fifteen fourteen and thirteen MASTER __ll CLEAR LOAD I I I I I I OA _j I I I I I I I L 1 r DB I _j De i ti Do _j L I COUNT UP COUNT DOWN QA I OB JI Oc I oo 1 I CARRY I U I BORROW I I SEQUENCE I I ILLUSTRATED I0 I I I j13l CLEAR PRESET I I 1 14 1s o 1 2 1 l COUNT UP __ j NOTES A Clear overrides load data and count inputs I U I 1 1 o 15 14 13 ...

Page 337: ...PUT IMPEDANCE R2 OUTPUT IMPEDANCE VERY LOW OPERATIONAL AMPLIFIER B GAIN 1 R1 R2 OUTPUT OUTPU RJ INPUT IMPEDANCE VERY HIGH OUTPUT IMPEDANCE VERY LOW D V 0 UTPUT Rl IF A IS LARGE VF Vt 11 R1 A1 Vo V1 1 Vz R2 A2 12 Al IF Vz 0 v THEN Vo V1 1 R2 3 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 338: ...ly Mother Board Assy Service Sheet 24 A18 5 2V Regulator and Fan Driver Assy Service Sheet 23 A20 5 2V and 44 6V Regulator Assy Service Sheet 22 A22 20V and 20V Regulator Assy Service Sheet 22 A24 Series Regulator Socket Assy Service Sheet 22 A26 AM AGC and RF Amplifier Assy 7 Service Sheets 12 13 14 15 16 1 Odd numbered assemblies and sub assemblies are accessible from bottom of instrument Even n...

Page 339: ...h arrows indicates path and direction of main feedback Wiper moves toward CW with clockwise rotation of control as viewed from shaft or knob Numbered Test point Lettered Test Point No Measurement aid measurement aid metal post provided circuit pad etc provided Encloses wire color code Code used is the same as the resistor color code First number identifies the base color second number identifies t...

Page 340: ...utton switches Pushing one switch in ON releases the other Indicates twisted wire pair Indicates multiple paths represented by only one line Letters or names identify individual paths Numbers indicate number of paths represented by the line Coaxial or shielded cable Stripline i e RF transmission line above ground RF coupling by magnetic H field 8 16 Artisan Technology Group Quality Instrumentation...

Page 341: ...d MIL STD 681 I t b me u t h e sistor color code Fint numMr iden Ufiu the bue color econd number the wtder stripe a nd the Lblzd number the n a nower ltrlpe f Jumple deno es whJt e ba M ytllow wide stripe Y okl IUIITOW p _ eX ample Ph a ia con MCUon lnformatJoa S Kir et d _ for A2 oaoml ly Connector symbob within the borderlines of circ uJt UMmbo bu li pufy c oa nec Jons o be plut part o f the use...

Page 342: ...ed or internal from the modulation oscillator In the pulse modulation mode external modulation pulses switch the modulator off and on Amplitude leveling is maintained in this mode by storing the detector output between pulses The 10 dB RF step attenuator further controls the output level The meter circuits monitor either the detector output and hence the output level the positive peak of the AM mo...

Page 343: ...rts except those to which access can be gained by hand is likely to expose live parts and also accessible terminals may be live Any adjustment maintenance and repair of the opened instrument under voltage should be avoided as much as possible and if inevitable should be carried out only by a skilled person who is aware of the hazard involved Capacitors inside the instrument may still be charged ev...

Page 344: ...TION vernier adjusts the input level into a unity gain Buffer Amplifier In addition to driving the FM amplifier the Buffer Amplifier drives the Over Deviation Detector and the Meter Attenuator In the event that the input signal exceeds 1 1V the Over Deviation Detector turns on the REDUCE FM VERNIER lamp The Meter Attenuator scales the input signal to the meter circuits in such a way that a 1 Vpk i...

Page 345: ...t two foldouts in this manual have top and bottom internal views of the instrument that show the locations of the test points assemblies and cables all RF cables are accessible from the bottom of the instrument NOTE After repairs are complete see Table 5 2 for appropriate post repair tests and adjustments Figure 8 17 FM Circuits and RF Oscillator Block Diagram 8 21 Artisan Technology Group Quality...

Page 346: ...ulses of low repetition rate and turns off the meter circuit when the rate is so low that the meter is no longer accurate The Modulation Overload Detector senses when the AGC reference the AM signal or a combination of the two is beyond the Modulator s capability to deliver power The REDUCE PEAK POWER lamp is then turned on The Meter Amplifier produces an output voltage proportional to the detecte...

Page 347: ...Model 8640B TM 9 4935 601 14 7 P Figure 8 18 AM AGC Circuits and Output Amplifier Block Diagram 8 23 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 348: ...o the Up Down Counter The counter counts down to zero and then underflows i e all counters at the state of nine and the time of occurrence of the underflow is compared with the termination of the time base cycle in the Null Phase Detector at the underflow the counter is once again preset from the buffers and continues counting toward zero The error from the detector adjusts the tuning of the RF Os...

Page 349: ... RANGE 128 TO 256 MH _l OFF lOC j t XPAND OFF J312 5 t 1Hz Jl09 o4 1 1 Hr EXPAND X1Q 31 3 t 1 Hr J0 9 1Hz EXPAND X100 1 t 1 Hr 5 1 1 H TTL SQUARE WAVE COUNTER MODE SOURCE EXT 0 10 COUNTER INPUT EXTERNAL 100 mV INTO 500 AT I kH 1 kHz nL SQUARE WAVE 3587 50 i 6 2 5 kHr TTL SQUARE WAVE NULL PHASE DETECTOR I COUNTER MODE 0 I I IONI 0 OFF ____ _j EXPANO X10 OVERFLOW LAMP NOTE TTL VOLTAGE LEVELS QTOD 4Y...

Page 350: ... R6 also C8 Divider Filter Buffer Amplifier only The collector of Q1 is Counter Lock Circuits Troubleshooting SERVICE SHEET 4 SERVICE SHEET 5 Cont d ac coupled to the base of Q2 by capacitor C4 Operation of transistor Q2 is similar to Q1 In the Counter Buffer Amplifier only resistors R10 R11 and R12 form a 10 dB pad to reduce the output level and increase the output to input reverse isolation The ...

Page 351: ... n I _ C7 I IOOD I J1 I 20Y zav 20V I W2 NOTES I SEEFIGURE 8 4 SCHEMATIC DIAGRAM NOTES 2 FOR TROUBLE SHOOTIN G MEASU RED RESISTANCEOF YARACTOR ANOD ETOGROUND IS APPROXIMATE LY 61 9 KQ t SEE BACKDA TING TABL ES 7 1 AND7 z R F RENCE D ESIGNATIONS NO PREFIX A3AIA3 ASSY P 0 W2 3 Cl 7 A 3 ASSY Ll 2 A2 01 2 Rl 12 CI Z Tl Ll Ql A3A 4 ASSY Rl Rl 6 TPI A3AIASSY AI FU 6 AB ASSY Jl2 P 0 XA3A4 A3AJA2 ASSY Cl ...

Page 352: ... a unity gain configuration followed by the positive shaping network Service Sheet 7 which has little effect an attenuator which determines the overall gain and the negative shaping network Service Sheet 7 which has only a small effect The effect of the shaping networks is small because voltage swings are small and the tuning characteristic of the varactor diodes is fairly linear over the narrow r...

Page 353: ... 23 P O A9 Peak Deviation and Range Switch Assembly Component Locations 2of 2 Figure 8 24 A5 FM Amplifier Assembly Component Locations Figure 8 25 FM Amplifiers Schematic Diagram 8 29 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 354: ... As the voltage at the input to the ladder increases the diodes turn on consecutively and the FM Amplifiers A3 A5 A9 A13 SERVICE SHEET 6 SERVICE SHEET 7 Cont d impedance at the input lowers The Negative Shaping network is analogous to the Positive Shaping network except the polarity of all voltages is reversed the diodes are reversed all transistors are complemented and the shaping characteristic ...

Page 355: ...9 4935 601 14 7 P Figure 8 26 P O a7 FM Shaping Assembly Component Locations Figure 8 27 FM Shaping Circuits and Phase Lock Loop Filter Schematic Diagram 8 31 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 356: ...tor lamp control circuits as a result of using the troubleshooting block diagrams Test Equipment Digital Voltmeter HP 3480B 3484A Oscilloscope HP 180A 1801A 1820C Initial Test Conditions Bottom cover removed see Service Sheet F for removal procedure Extend A7 FM Shaping Assembly on extender board Connect AM OUTPUT to FM INPUT Initial Control Settings AM INT AUDIO OUTPUT LEVEL cw MODULATION ccw MOD...

Page 357: ...ation and Range Switch Assembly Component Locations 2 of 2 Figure 8 30 P O A7 FM Shaping Assembly Component Locations Figure 8 31 Over Deviation Detector and Meter Control Circuits Schematic Diagram 8 33 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 358: ...ATION vernier potentiometer Q4 drives the AM MODULATION potentiometer Q1 drives the AM OUTPUT port and Q2 drives the FM OUTPUT port Signal levels at the two ports are approximately 1 Vrms into 6002 TROUBLESHOOTING It is assumed that a problem has been isolated to the fixed frequency modulation oscillator as a result of using the troubleshooting block diagrams Troubleshoot by using the test equipme...

Page 359: ...935 601 14 7 P Figure 8 32 A11 Fixed Frequency Modulation Oscillator Component Locations Figure 8 33 Fixed Frequency Modulation Oscillator Schematic Diagram 8 35 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 360: ... a thermistor assembly Diodes VR1 VR2 CR5 and CR6 add a small amount of odd harmonic distortion to stabilize the amplitude characteristic of the oscillator Buffer Amplifiers A11 Transistors Q1 to Q4 form the AM FM Output Buffer Amplifier which is similar in operation to the oscillator output amplifier Gain of the amplifier is adjusted by R40 The outputs drive the external AM or FM ports Resistors ...

Page 361: ...odulation Oscillator Assembly Option 001 Component Locations Figure 8 35 Variable Frequency Modulation Oscillator Option 001 Schematic Diagram 8 37 A13 Component Locations for A13 Assembly are on Service Sheet 25 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 362: ...s SERVICE SHEET 10 Cont d TROUBLESHOOTING It is assumed that a problem has been isolated to the RF Filter circuits as a result of using the troubleshooting block diagrams Troubleshoot by using the test equipment listed below performing the initial test conditions and control settings and following the procedures outlined in the table Test Equipment Digital Voltmeter HP 3480B 3484A Initial Test Con...

Page 363: ... 4935 601 14 7 P Figure 8 36 A10A1 RF Filter Assembly Component Locations 2 of 2 Figure 8 37 FR Filters Schematic Diagram 8 39 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 364: ...al test conditions and control settings and following the procedures outlined in the table Test Equipment Digital Voltmeter HP 3480B 3484A NOTE If problems occur only on the lower bands an oscilloscope can be used to locate the defective RF circuit On the higher bands either a high frequency oscilloscope a sampling oscilloscope or a spectrum analyzer with a high impedance probe can be used Initial...

Page 365: ...9 4935 601 14 7 P Figure 8 38 A10A2 RF Divider Assembly Component Locations Figure 8 39 RF Dividers Schematic Diagram 10 8 41 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 366: ...t low repetition rates and short on periods the capacitor discharge time is very long To correct for this Pulse Overload Detector U1B senses the condition of large error i e when the collector voltage of Q3 exceeds 0 4 Vdc and switches a discharge resistor on to bring the system to a near zero error condition Meter Amplifier Amplifier U1A is an inverting amplifier with a gain of about adjusted by ...

Page 367: ...tor Assembly Component Locations Figure 8 41 A26A4 AGC Amplifier Assembly Component Locations Figure 8 42 AGC Amplifiers and Amplitude Modulator Schematic Diagram 8 43 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 368: ...for 50 ms If the repetition rate of the incoming pulses is higher than 20 Hz U3A retriggers and the Q output remains low In the absence of pulses from the Q output of U3A the Q output of U3B is low transistor Q7 is off and the meter operates normally For pulse repetition rates less than 20 Hz U3B is periodically triggered by the Q output of U3A The Q output of U3B goes high for 100 ms or longer if...

Page 369: ...Assembly Component Locations Figure 8 44 P O A26A2 AM Offset and Pulse Switching Assembly Component Locations Figure 8 45 RF Amplifier Pulse Switching and Step Attenuator Schematic Diagram 8 45 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 370: ...er The amplifier output drives OUTPUT LEVEL vernier A1R1 Service Sheet 16 TROUBLESHOOTING It is assumed that a problem has been isolated to the AM preamplifier as a result of using the troubleshooting block diagrams Troubleshoot by using the test equipment listed below performing the initial test conditions and control settings and following the procedures outlined in the table Test Equipment Digi...

Page 371: ...4 7 P Figure 8 46 P O A26A2 AM Offset and Pulse Switching Assembly Component Locations Figure 8 47 AM Preamplifier Schematic Diagram 8 47 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 372: ... it is desired to leave the oscillator running when RF is OFF e g to keep the AUX RF OUT on and the counter operating or the phase locked or to minimize turn on drift the RF ON OFF function may be easily modified See Service Sheet 5 for modification instructions Some RF however will then be present at the output when RF is OFF TROUBLESHOOTING Troubleshoot by checking switches and connectors for pr...

Page 373: ...LOOANDIIU rn 17 f 1 1 20 f 20 I 14 LO BAND 2 IU 20 12 3 f NC iI I i I I I I i I I 413 TI I HI DBLR I Y IC Q IRANGE I I r 10 I PIO _ S 2A R 8 _1 9 112 IM il bl I Q 5 1M Jz 0 IT J 2QilMHz _j 0 0 0 0 16 IW lz I 0 0 16 3Uttlz I 44 6V 20 f 1 JOf 44 6V I 20V 20V t l 2 29 20V I I I 5 zv 2 I 4 27f s 2V I I ry 1 1 s rys 26 t f 0 0 32 64Miz 0 0 64 128 Ytlz I 0 0 i2s 256 Miz I 0 0 256 512 MH1 I 9 0 512 1024 ...

Page 374: ...he output of Meter Amplifier A26A4U1A Service Sheet 12 is the RF LEVEL meter voltage Resistor A1AlR3 attenuates the amplifier output by 1 3 5 in the highest or 16th OUTPUT LEVEL range Resistor A1AlR4 attenuates the output by 1 1 1 on ranges 8 to 15 Resistors AlAiR5 and R6 adjust the meter output attenuation to compensate the meter for cumulative errors in the output attenuator on the high attenuat...

Page 375: ...M 9 4935 601 14 7 P Figure 8 49 A1A1 RF Vernier Assembly Component Locations Figure 8 50 RF Vernier Schematic Diagram 8 51 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 376: ...der R3 and R4 Resistor R5 adds a small amount of hysteresis to the comparator Ripple at the input pin 2 is reduced by R7 and C2 SERVICE SHEET 17 Cont d Logic Circuitry A4 The logic gates control the meter amplifier gain and scale lamps except for FM as outlined in Table 8 5 Whenever OUTPUT LEVEL switch A1S1AF is in an odd range the ODD RANGE CODE line is grounded The ranges on the switch are numbe...

Page 377: ...ter Annunciator Drive Assembly Component Locations Figure 8 53 P O A6 Annunciator Assembly Component Locations Figure 8 54 Meter Circuits Schematic Diagram 8 53 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 378: ...bleshoot by using the test equipment listed below performing the initial test conditions and control settings and following the procedures outlined in the table Test Equipment Digital Voltmeter HP 3480B 3484A Oscilloscope HP 180A 1801A 1820C Frequency Counter HP 5327C Meter Circuits A2 A4 A6 SERVICE SHEET 17 SERVICE SHEET 18 Cont d Initial Test Conditions Top cover removed see Service Sheet F for ...

Page 379: ...8A1 RF Scaler Assembly Component Locations Figure 8 56 P O A8A3 Time Base Assembly Component Locations Figure 8 57 Counter RF Scaler Schematic Diagram 8 55 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 380: ... and the QA output of U12B goes low The count sequence now repeats The result of the sequence is that the output of U12B is low for 100 counts of the TA input of U11 and high for one count dividing the frequency by 101 In the locked mode the LOCK line is high Counters U11 and U10 count the TA input pulses of U11 When the count reaches 100 the QD output of U10 goes low and the QA output of U12B goe...

Page 381: ...3 time Base Assembly Component Locations A9 Component Locations for A9 Assembly are on Service Sheets 6 and 8 Figure 8 59 Counter Time Base Schematic Diagram 8 57 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 382: ... counters U19 to U24 form a synchronous counter OR gates U27A to U27C and AND gate U13C have high outputs unless all previous counters are at the zero count When any of the OR gates or AND gate U13C are low the output of the following NOR gate U5A to U5D or U25B goes high on the next clock input Thus each counter changes count only at the occurrence of a clock input and only if all previous counte...

Page 383: ...lay Assembly Component Locations P O A8 Figure 8 61 P O A8A2 Counter Lock Board Assembly Component Locations Figure 8 62 Up Down Counter and Display Schematic Diagram 8 59 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 384: ... The error is sensed by transistors Q2 and Q15 The emitter of Q2 is held at 14 9V and Q15 normally holds Q2 on If the base of Q15 is low the collector current is insufficient to hold resistor R30 and the base of Q2 at the 14 3V needed to keep Q2 on If the base of Q15 is high Q15 saturates and the collector voltage rises as the base rises When the collector voltage of Q15 exceeds 14 3V Q2 switches ...

Page 385: ...4 7 P Figure 8 63 P O A8A2 Counter Lock Board Assembly Component Locations Figure 8 64 Counter Phase Lock Circuits Schematic Diagram 8 61 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 386: ...the bridge rectifiers are defective ripple and noise could increase without affecting the supply s average voltage or output current Use the oscilloscope to measure ripple and noise connect the probe from the test points given below to chassis ground Supply Test Point Typical Ripple and Noise 44 6V A20TP1 0 7 Vp p 20V A22TP1 0 5 Vp p 5 2V A20TP6 1 Vp p 20V A22TP6 0 3 Vp p 5 2V A18TP1 0 8 Vp p If o...

Page 387: ...44 6V Regulator Assembly Component Locations Figure 8 68 A22 20V and 20V Regulator Assembly Component Locations Figure 8 69 Power Supply Circuits Schematic Diagram 8 63 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 388: ...nserting circuit boards Initial Control Settings LINE ON Regulator Circuits A18 The first step in solving a power supply problem is to ensure that the problem is caused by the power supply Minimum load resistances are given below for the supply However depending upon the ohmmeter and resistance range used measured resistance can vary from a few ohms to several kilohms So unless the load is actuall...

Page 389: ...e 8 70 A18 5 2V Regulator and Fan Driver Assembly Component Locations Figure 8 71 5 2V Regulator and Fan Circuits Schematic Diagram 8 65 8 66 blank Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 390: ...Model 8640B TM 9 4935 601 14 7 P 5 2V Regulator and Fan Circuits A16 A18 SERVICE SHEET 23 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 391: ... 9 8 7 6 5 4 3 2 J AND R F XA26A5 fo AMPL 15 16 17 18 19 20 SERIES XA24 11 12 13 14 REGULATOR 11 15 16 17 18 w RISER J h L 12 13 14 I 940 PIOAl5 Rl SER 1 08640 600181 TO INT EXT REF ASSY I I ODD R NC 7 1 NC l SUP P I 3 5 2V 4 PULS 5 5 2 EON CODE V SUPPLY XT REF SW SUPPLY 6 t INTfE 7 20V NC 7 g N C 9 5 2 _ 10 LO B V SUPPLY AND I BLER CODE V SUPPLY 1 11 t DOU 1z t s z 13 20V SUPPLY NC 7 14 NC NC 7 1...

Page 392: ...ure 8 74 A13 Modulation Metering Mother Board Assembly Component Locations 1 of 2 Power Supply Mother Board A17 SERVICE SHEET 24 8 68 A13 TOP VIEW Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 393: ...e 8 74 A13 Modulating Metering Mother Board Assembly Component Locations 2 of 2 Figure 8 75 Modulating Metering Mother Board Schematic Diagram 8 69 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 394: ...A2 Output Attenuator Assy cable W10 at A1A2J1 and cable W11 at A1A2J2 4 Disconnect plug P2 from A1A1 RF Vernier Assy located at rear of A1 Output Level Assy 5 Disconnect two semi rigid coaxial cables from bottom of AS Counter Lock Assy cable W2 at A8A1J2 and cable W14 at A8A11 6 Remove front side plate cover item 14 in Figure 6 1 from right hand side frame by removing two flat head screws 7 Remove...

Page 395: ...rt 13 A1MP13 Gear Assembly Support 14 A1MP14 Attenuator Support 15 A1MP15 Spur Gear 16 A1MP16 Gear Shaft 17 A1A1 R F Vernier Assembly 18 A1A2 Output Attenuator Assembly 19 A1MP19 Pin 20 A1MP20 Lock washer 21 A1MP21 Lock washer 22 A1MP22 Machine Screw 23 A1MP23 Machine Screw 24 A1MP24 Machine Screw 25 A1MP25 Hex Nut 26 A1MP26 Setscrew 27 A1MP27 Brass Washer 28 MP55 Attenuator Shield 29 MP80 Spur Ge...

Page 396: ...ending the connector pins and sockets A8A1 Access WARNING The edges of the RFI gasket may be sharp and may cause personal injury if not handled with care 6 To gain access to the A8A1 RF Scaler Assembly remove six pan head screws with lockwashers that secure the cover shield Remove the cover shield and gasket A8 Removal NOTE The entire A8 Assembly must be removed from the chassis to remove the A8A1...

Page 397: ... 6 A8MP2 Lockwasher 7 A8MP3 Mica Washer 8 A8MP4 Center Filter Gasket 9 A8MP5 Center Scaler Gasket 10 A8L1 5 Inductor 12 A8MP6 LED Button Shield 13 A8MP7 Center Filter Cover 14 A8MP8 Large Frame RF Shield 15 A8MP9 Small Frame RF Shield 16 A8MP10 Center Input Cover Shield 17 A8 MP11 Heat Sink 18 A8MP12 Counter Window 19 A8MP13 P C Board Support 20 A8MP14 Button Shield 21 A8MP15 Top Casting Cover 22 ...

Page 398: ...rews 3 Remove A11 Assembly by gently lifting the board extractor at rear of board and sliding assembly to the rear and out of chassis 4 To connect A11 Assembly for service place assembly on extender board and install in chassis Reinstall MODULATION FREQUENCY knob with 400 Hz position toward top of instrument A11 Removal Option 001 1 Remove top and bottom covers from instrument see Service Sheet F ...

Page 399: ...on 001 Legend Item Number Reference Designator Description 1 A11A1Sl Rotary Switch 2 A11A1MP1 Gear Support Housing 3 A11A1MP2 Spur Gear 4 A11A1MP3 Spur Gear 5 A11MP3 Spur Gear 6 A11MP4 Audio Oscillator Cover Capacitor 7 A11C1 Variable Capacitor 8 P O A11 Audio Oscillator Assembly 9 A11MP5 Support 10 A11MP6 Audio Oscillator Cover Circuit 11 A11A1MP4 Audio Oscillator Shaft 12 A11MP7 Spacer 13 A111MP...

Page 400: ...nstalling the A10A2 Assembly in the riser socket A10A1XA10A3A and B and reinstalling the power supply circuit boards A18 A20 and A22 A10A1 Removal 8 Turn instrument upside down and remove bottom cover see Service Sheet F CAUTION While working with and around the semi rigid coaxial cables in the generator do not bend the cables more than necessary Do not torque the RF connectors to more than 2 inch...

Page 401: ...Cover Casting 16 A10MP10 D F Center Casting 17 A10A1MP6 D F Bottom Cover Casting 18 A10A1MP7 Bushing 19 A10A1MP8 Cam Cover 20 A10A1MP9 Cam Follower 21 A10A1MP10 Slider Clamp 22 A10A1 Filter Switch Assembly 23 A10OA3 Riser Board 24 A10A2 RF Divider Assembly 25 A10MP11 Lockwasher 26 A10MP12 Machine Screw 27 A10A1MP11 Machine Screw 28 A10MP13 Machine Screw 29 A10MP14 Machine Screw 30 A10A1MP12 Clamp ...

Page 402: ...NG The RFI gasket on casting cover may have sharp edges and may cause personal injury if not handled with care 3 Lift cover from casting noting the orientation of the RFI gasket under the cover NOTE Do not attempt to replace components on the A26A1 and A26A3 assemblies without removing them A26A1 and A26A2 Removal 4 Remove two pan head screws with washers that secure microcircuit amplifier A26U1 o...

Page 403: ...uctor 21 P OA26U1 2 Heat Sink 22 A26MP5 Cover 23 A26MP6 Cover 24 A26MP7 Cover 25 A26MP8 Casting 26 A26MP9 Cover 27 A26A5 Riser Board 28 A26A6 Mother Board 29 A26A2 AM OFF PUL Assembly 30 A26A4 AGC Amplifier Assembly 31 A26A3 Modulator Assembly 32 A26A1 Power Amplifier and AGC Detector Assembly 33 A26MP10 Cover 34 A26MP11 Guide 35 A26MP12 Guide 36 A26MP13 Guide 37 A26MP14 Machine Screw 38 A26MP15 M...

Page 404: ...hite wire to positive post 7 Push top edge of meter to the rear and lift meter from chassis NOTE If necessary loosen All Modulation Oscillator to provide clearance for meter see Service Sheet C 8 To install meter reverse procedure given in steps one through seven To install Annunciator Assembly reverse procedure given in steps one through five NOTE Check that the insulator between the right hand a...

Page 405: ...PUL A26A2TP7 MET A26A2TP8 BW A26A4Rl LVL A26A4R2 DBLR LVL A26A4R12 METER ADJ A26A4TP1 MET A26A4TP2 DET A26A4TP3 OVLD A26A4TP4 VERN A26A4TP5 GND A26A4 1 1 6 CQl A26A4TP7 DRVR A26A4TP8 MOD 0 AG ANNUNCIATOR ASSY A26A2 AM 1 OFFSET AND PULSE SWITCHIN G rii l r na ASSY SPARE FUSE KIT JGTIME BASE IN OUT S3 EXT INT A14 LINE POWERASSY C4 5 2V C5 5 2V Cl 20V C2 2DV A12 RECTIFIER ASSY T1 EXTENDER BOARD A2 ME...

Page 406: ...Model 8640B TM 9 4935 601 14 7 P G Figure 8 84 Bottom Internal Views Option 001 Shown 8 83 8 84 blank Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 407: ...PENDIX A MAINTENANCE ALLOCATION CHART Information pertaining to Maintenance Allocation Chart MAC will be furnished at a later date A 1 A 2 blank Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 408: ...tates Army Official Chief of Staff R L DILWORTH Brigadier General United States Army The Adjutant General Distribution To be distributed in accordance with Special Distribution List Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 409: ...TLE _sE_E_xA CT P IN PO IN_r_wH_E RE IT 15 IN THIS SPACE TELL WHAT IS WRONG AND WHAT SHOULD BE DONE ABOUT IT PAGE PARA FIGURE TABLE NO GRAPH NO NO PRINTED NAME GRADE OR TITLE AND TELEPHONE NUMBER DA 1 s 2028 2 PREVIOUS EDITIONS ARE OBSOLETE SIGN HERE P S IF YOUR OUTFIT WANTS TO KNOW ABOUT YOUR RECOMMENDATION MAKE A CARBON COPY OF THIS AND GIVE IT TO YOUR HEADQUARTERS Artisan Technology Group Quali...

Page 410: ...PIN 060577 000 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 411: ...quipment Have surplus equipment taking up shelf space We ll give it a new home Learn more Visit us at artisantg com for more info on price quotes drivers technical specifications manuals and documentation Artisan Scientific Corporation dba Artisan Technology Group is not an affiliate representative or authorized distributor for any manufacturer listed herein We re here to make your life easier How...

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