HP (Hewlett-Packard) HP 8568B manuel d'utilisation

Performance Tests and Adjustments Manual HP 8568B Spectrum Analyzer HEWLETT PACKARD HP Part No. 08568-90118 Printed in USA September 1993[...]

@Copyright Hewlett-Packard Company 1993 All Rights Reserved. Reproduction, adaptation, or translation without prior written permission is prohibited, except as allowed under the copyright laws. 1212 Valley House Drive, Rohnert Park, CA 94928-4999, USA[...]

Certification Hewlett-Packard Company certifies that this product met its published specifications at the time of shipment from the factory. Hewlett-Packard further certifies that its calibration measurements are traceable to the United States National Institute of Standards and Technology, to the extent allowed by the Institute’s calibration fac[...]

Assistance Product maintenance agreements and other customer assistance agreements are available for Hewlett-Rwkard products. Fbr any assistance, contact your nearest Hewlett-Packard Sales and Service OJke.[...]

Safety Symbols Caution Warning The following safety symbols are used throughout this manual. Familiarize yourself with each of the symbols and its meaning before operating this instrument. The caution sign denotes a hazard. It calls attention to a procedure which, if not correctly performed or adhered to, could result in damage to or destruction of[...]

HP 8568B Spectrum Analyzer Documentation Outline HP 8568B Installation and Verification Manual HP 8568B Operating and Programming Manual HP 8568B Performance Tests and Adjustments Manual HP 85680B RF Section Troubleshooting and Repair Manual HP 85662A IF-Display Section Troubleshooting and Repair Manual Included with the HP Model 8568B Spectrum Ana[...]

Contents 1. General Information Introduction ..................... Instruments Covered by this Manual ......... Operation Verification ................ Option 462 Instruments ............... Option 857 Instruments ............... 2. Performance Tests Introduction ..................... Verification of Specifications ............. Calibration Cycle .[...]

3. Test 11. Log Scale Switching Uncertainty Test .... Test 12. Amplitude Fidelity Test ........... Test 13. Average Noise Level Test .......... Test 14. Residual Responses Test ........... Test 15. Spurious Responses Test .......... Test 16. Residual FM Test .............. Test 17. Line-Related Sidebands Test ......... Test 18. Calibrator Amplitude[...]

Crystal Filter Bypass Network Configuration . . . . . 3-151 4. Option 462 Introduction . . . . . . . . . . . . . . . . . . . . . 4-l 4. 6 dB Resolution Bandwidth Accuracy Test . . . . . 4-2 4. Impulse and Resolution Bandwidth Accuracy Test . 4-4 5. 6 dB Resolution Bandwidth Selectivity Test . . . . 4-10 5. Impulse and Resolution Bandwidth Selectivi[...]

Figures l-l. Service Accessories, HP Part Number 08568-60001 . . 2-l. Center Frequency Accuracy Test Setup ........ 2-2. Center Frequency Readout Error Measurement .... 2-3. Frequency Span Accuracy Test Setup ........ 2-4. Sweep Time Accuracy Test Setup .......... 2-5. Penlift Output Signal ................ 2-6. Resolution Bandwidth Measurement ...[...]

3-8. Location of AlA Components ........... 3-9. CRT Cut-Off Voltage 3-10. Waveform at AlA3TP5’ : : : : : : : : : : : : : : : 3-11. Discharging the CRT Post-Accelerator Cable ..... 3-12. High Voltage Adjustment Setup ........... 3-13. Location of High Voltage Adjustments ........ 3-14. Location of AlA Label and Test Point ........ 3-15. Dischargi[...]

3-56. 20 MHz Reference Adjustments Setup ........ 3-57. Location of 20 MHz Reference Adjustments ..... 3-58. Typical Signal at A16TP3 .............. 3-59. 249 MHz Phase Lock Oscillator Adjustments Setup . . 3-60. Location of 249 MHz Phase Lock Oscillator Adjustments 3-61. 275 MHz Phase Lock Oscillator Adjustment Setup ... 3-62. Location of 275 MHz [...]

6-7. IF Section, Bottom View . . . . . . . . . . . . . . 6-10 Contents-7[...]

lhbles 2-l. Performance Test Cross-Reference .......... 2-2. Center Frequency Readout Error Test Record ..... 2-3. Wide Span Error .................. 2-4. Span Error ..................... 2-5. Sweep Time Accuracy, Sweep Times 220 ms ..... 2-6. Sweep Time Accuracy, Sweep Times ~20 s ...... 2-7. Sweep Time Accuracy, Sweep Times 220 ms (Alternate Proc[...]

1 General Information Introduction Warning Instruments Covered by this Manual This HP 8568B Tests and Adjustments Manual contains two sections: Performance Tests and Adjustments Procedures. The Performance Tests provided should be performed for the following reasons: w If the test equipment for the Operation Verification Program is not available. n[...]

Operation Verification A high confidence level in the instrument’s operation can be achieved by running only the Operation Verification Program, since it tests most of the instrument’s specifications. It is recommended that the Operation Verification Program be used for incoming inspection and after repairs, since it requires much less time and[...]

‘Ihble l-l. Recommended Test Equipment (1 of 5) Critical Specifications for Equipment Substitution Zecommended Model Frequency: 10 MHz to 1500 MHz Output Power: + 10 dBm maximum (leveled) Aging Rate: ~1 x 10mg/day Spurious Signals: 135 dBc (~7 GHz) HP 8340A 125 dBc (<20 GHz) Amplitude Modulation: dc to 100 kHz Leveling: Internal, External Powe[...]

‘Ihble l-l. Recommended Test Equipment (2 of 5) Instrument ANALYZERS Spectrum Analyzer Spectrum Analyzer AC Probe Scalar Network Analyzer Detector (2 required) COUNTERS Frequency Counter Electronic Counter j = Universal Counter OSCILLOSCOPE Oscilloscope Probe Critical Specifications for Equipment Substitution Frequency: 100 Hz to 2.5 GHz 2 to 22 [...]

[...]

‘Ihble l-l. Recommended Test Equipment (4 of 5) Instrument ATTENUATORS (Cont’d) 20 dB Attenuator TERMINATIONS Termination FIWERS Low-Pass Filter Low-Pass Filter Low-Pass Filter MISCELLANEOUS DEVICES Power Splitter Directional Bridge SPECIAL DEVICES Display Adjustment PC Board Low-Noise DC Supply Crystal Filter Bypass Network (4 required) Critic[...]

‘Ihble l-l. Recommended Test Equipment (5 of 5) Instrument Critical Specifications for Recommended Perf. Adj a Equipment Substitution Model Test CABLES Cable Assembly Frequency Range: 200 Hz to 22 GHz HP 8120-4921 X X APC 3.5 Male Connectors Length: 91 cm (36 inches) SWR: cl.4 at 22 GHz Cable BNC, 122 cm (48 in.) (3 required) 10503A x x Test Cabl[...]

Description Extende r Board : 2 0 contacts ; 2 row s o f 10 Cable: 4-foot long; BNC to SMB snap-on PC Board: Display Adjustment Test Extende r Board : 3 0 contacts ; 2 row s o f 15 Extende r Board : 1 2 contacts ; 2 row s o f 6 Extende r Board : 5 0 contacts ; 2 row s o f 25 Extende r Board : 3 6 contacts ; 2 row s o f 18 HP Part Number 85680-60028[...]

2 Performance Tksts Introduction The procedures in this section test the instrument’s electrical performance using the Specifications in the Installation and Verification Manual as the performance standards. None of the tests require access to the interior of the instrument. The manual Performance Tests provide d in this section should be perform[...]

Equipment Required Equipment required for the manual performance tests and adjustments is listed in ‘Ihble 2-1, Recommended Test Equipment, at the beginning of this manual. Any equipment that satisfies the critical specifications given in the list may be substituted for the recommended model. Test Record The Operation Verification Program provide[...]

1. Center Frequency Readout Accuracy Test 1. Center Frequency Readout Accuracy ‘I&t Related Adjustments Specification (uncorrected) Description Frequency Control Adjustments Time Base Adjustment Step Gain and 18.4 MHz Local Oscillator Adjustments 50 MHz Voltage-Tuned Oscillator Adjustments f2% of frequency span + frequency reference error x t[...]

1. Center Frequency Readout Accuracy Test Equipment Synthesized Sweeper . . . . . . . . . HP 8340A Frequency Standard . 10 MHz standard, accy within + 1 part in lOlo, e.g. HP 5061A Adapter, Type N (m) to SMA (f) . . . HP1250-1250 61 cm (24 in.) Cable Assembly, SMA Male Connectors HP 5061-1086 Procedure 1. 2. 3. 4. 5. 6. 7. 8. Connect CAL OUTPUT to [...]

1. Center Frequency Readout Accuracy Test Note Spectrum analyzer center frequency readout can fall outside of specified limits if 10 MHz frequency reference has not been calibrated within the past year. To eliminate “frequency reference error x tune frequency” term, substitute spectrum analyzer 10 MHz FREQ REFERENCE rear panel output for freque[...]

2. Frequency Span Accuracy lkst Related Adjustments Frequency Control Adjustments 50 MHz Voltage-Tuned Oscillator Adjustments Specification Span >l MHz 51 MHz Uncertainty f(2% of the actual frequency separation between two points +0.5% of span setting) 445% of the actual frequency separation between two points +0.5% of span setting) Description [...]

Equipment Procedure Spectrun Frequent y &an 200Hz IOOkHz 100.1 kHz 1MHz 1.01 MHz 20MHz 20.1 MHz 1.5 GHz Analyzer Center Frequent y 10 0 MHz 100MHz 10 0 MHz 10 0 MHz 10 0 MHz 10 0 MHz 10 0 MHz 90 0 MHz 2. Frequency Span Accuracy Test Synthesized Sweepe r ..................................................................... 83640A AdapterTypeN(m)[...]

2. Frequency Span Accuracy Test Freq Span r- 1 1.5 GHz -34,500.OOO Hz ] 34,500O.OOO Hz ‘Ihble 2-4. Span Error -I- SDan Error ADUT-ASyn from ‘Ihble 2-3 -I Spec. Min Max -1 0 Hz 1 0 Hz -500 0 Hz 500 0 Hz -5,00 5 Hz 5,00 5 Hz -50,00 0 Hz 50,00 0 Hz -23,23 0 Hz 23,23 0 Hz -460,00 0 Hz 460,00 0 Hz -462,30 0 Hz 462,30 0 Hz Note The specification in T[...]

3. Sweep Time Accuracy Test (220 ms) 3. Sweep Time Accuracy Test (220 ms) Related Adjustment Frequency Control Adjustments Specification *lo% for sweep times 5100 seconds &20% for sweep times >lOO seconds Description Preferred Procedure This test is for sweep times 220 ms. For faster sweep times, refer to Fast Sweep Time Accuracy Test (Test [...]

3. Sweep Time Accuracy Test (220 ms) Equipment Universal Counter .......................................... HP 5316A Digital Voltmeter ........................................... HP 3456A Procedure Sweep Times 220 ms 1. Connect equipment as shown in Figure 2-4. 2. Press [INSTR PRESET ) on the spectrum analyzer. 3. Key in the following settings: ( C[...]

3. Sweep Time Accuracy Test (220 ms) NOTE:PULSE WIDTH APPROXIMATE +15v -r-l t-SWEEP RETRACE rl JI t-ACTIVE SNEEP + ov- --- 1 L --- START+TI”E STOPhE INTERVAL INTERVAL MEASUREMENT MEASUREMENT Figure 2-5. Penlift Output Signal 6. Note the measured sweep time on the universal counter and record this value in Table 2-5. The measured sweep time should[...]

3. Sweep Time Accuracy Test (220 ms) ‘Ihble 2-6. Sweep Time Accuracy, Sweep Times 220 s [ SWEEP TIME ) Marker A Time Min Measured Max 20 s 3.6 s 4.4 s 200 s 32 s 48 s Sweep Times 220 ms 14. Sweep times 220 ms are tested without external test equipment (Alternate Procedure) by the following procedure. 15. Press ~NSTR PRESET). Start-Up Time 16. Set[...]

4. Resolution Bandwidth Accuracy Test 4. Resolution Bandwidth Accuracy Test Related Adjustment Specification Description Equipment Procedure (For instruments with Option 462, refer to Chapter 4.) 3-dB Bandwidth Adjustments &20%, 3 MHz +lO%, 3 kHz to 1 MHz &20% 10 Hz to 1 kHz 30 kHz and 100 kHz bandwidth accuracy figures apply only with 190%[...]

4. Resolution Bandwidth Accuracy Test Figure 2-6. Resolution Bandwidth Measurement 8. Vary spectrum analyzer settings according to ‘fable 2-8. Measure the 3 dB bandwidth for each resolution bandwidth setting by the procedure of steps 6 and 7 and record the value in ‘Ihble 2-8. The measured bandwidth should fall between the limits shown in the t[...]

[...]

5. Resolution Bandwidth Selectivity Test 6. Read the 60 dB bandwidth for the 3 MHz resolution bandwidth setting from the MARKER A frequency readout (see Figure 2-7) and record the value in Table 2-9. 7. Vary spectrum analyzer settings according to Table 2-9. Measure the 60 dB bandwidth for each resolution bandwidth setting by the procedure of steps[...]

5. Resolution Bandwidth Selectivity Test ‘lhble 2-9. Resolution Bandwidth Selectivity Spectrum Analyzer Measured Measured Bandwidth Maximum RES] ( FREQUEN C Y SPAN ) @iiFSE] 6OdB 3 dB Selectivity Selectivity Ratio Bandwidth Bandwidth (60 dB BW + 3dBBW) 3 MHz 20 MHz 100 Hz 15:l 1 MHz 15 MHz 300 Hz 15:l 300 kHz 5 MHz AUTO 15:l 100 kHz 2 MHz AUTO 15[...]

6. Resolution Bandwidth Switching Uncertainty Test Related Adjustments Specification Description Equipment Procedure (For instruments with Option 462, refer to Chapter 4.) 3 MHz Bandwidth Filter Adjustments 21.4 MHz Bandwidth Filter Adjustments Down/Up Converter Adjustments (uncorrected; referenced to 1 MHz bandwidth; 20 - 30°C after 1 hour warm-u[...]

6. Resolution Bandwidth Switching Uncertainty Test Figure 2-8. Bandwidth Switching Uncertainty Measurement ‘Ihble 2-10. Bandwidth Switching Uncertainty 1 MHz 5 MHz 3 MHz 5 MHz 300 kHz 5 MHz 100 kHz 500 kHz 30 kHz 500 kHz 10 kHz 50 kHz 3 kHz 50 kHz 1 kHz 10 kHz 300 Hz 1 kHz 100 Hz 1 kHz 30 Hz 200 Hz 10 Hz 100 Hz Deviation (MKR A Readout, dB) 0 (re[...]

[...]

7. Input Attenuator Switching Uncertainty Test 6. Press MARKER CPEAK SEARCH),(KJ 7. Set [~~J’JREFERENCE LEVEL ], and frequency synthesizer amplitude according to Table 2-l 1. At each setting, press MARKER ( PEAK SEARCH ) and record the deviation from the 10 dB setting from the MARKER A amplitude readout (see Figure 2-10). The deviation should not[...]

8. Frequency Response Test Related Adjustment Specification Description SYNTHESIZED SWEEPER Slope Compensation Adjustment SIGNAL INPUT 1 ~tl.5 dB, 100 Hz to 1.5 GHz *I dB, 100 Hz to 500 MHz SIGNAL INPUT 2 fl dB, 100 kHz to 1.5 GHz Frequency response at both analyzer inputs is tested by slowly sweeping a flat signal source over the frequency range a[...]

8. Frequency Response Test Note Equipment listed is for three test setups, Figure 2-11, Figure 2-13, and Figure 2-15. Equipment Synthesized Sweeper ....................................... HP 8340A Power Meter ............................................... ..HP436 A Power Sensor ............................................... HP 8482A Frequency Syn[...]

8. Frequency Response Test 7. 8. 9 . Key in the following spectrum analyzer settings: 10 . Press TRACE A [MAX) on the analyzer. 11 . Press SWEEP SINGLE on the synthesized sweeper. Adjust POWER LEVEL on synthesized sweeper (using data knob) to place peak of 20 MHz signal near reference level (top) graticule line. Press [ ENTER dB/mv], 1 dB on spectr[...]

8. Frequency Response Test Option 001: Set [ REFERENCE LEVEL ] TO -6.0 dBm. 15. Repeat steps 6 through 11. Press DISPLAY LINE [ENTER) on the spectrum analyzer. Use the Display Line to measure the maximum and minimum points on the trace. Record measurements below. SIGNAL INPUT 1 (20 MHz to 1.5 GHz) Maximum dBm Minimum dBm 16. Press MARKER (-1 on spe[...]

[...]

8. Frequency Response Test 25. After completion of sweep, press DISPLAY LINE (j?KiK] on the spectrum analyzer. Use the Display Line to measure the maximum and minimum points on the trace. Record the measurements below. SIGNAL INPUT 1 (100 kHz to 20 MHz) Maximum dBm Minimum dBm 26. Measure and record signal level at start of trace (100 kHz). SIGNAL [...]

8. Frequency Response Test 100Hzt o 100 kHz 32. 33. 34. 35. 36. 37. 38. 39. 40. 41. Press (INSTR PRESET ) on the spectrum analyzer. Activate SIGNAL INPUT 1. Key in the following spectrum analyzer settings: START FREQ) . . . . .._.............................. ;&TEq . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [...]

8. Frequency Response Test 42. Press DISPLAY LINE [ENTER] on the spectrum analyzer. Use the Display Line to measure the maximum and minimum points on the trace. (Disregard LO Feedthrough at 1 kHz.) Record the measurements below. SIGNAL INPUT 1 (1 kHz to 100 kHz) Maximum dBm Minimum dBm 43. Set Display Line to peak of trace at 1 kHz. 44. Key in the [...]

8. Frequency Response Test 49. For each input, subtract the lowest minimum level (greatest negative) from the highest maximum (least negative) measurement recorded in steps indicated. The result should not exceed 2 dB. SIGNAL INPUT 1 100 Hz to 500 MHz (from steps 16, 25, 42, or 48) Spec: ~2 dB Overall Maximum dBm -Overall Minimum dBm Overall Deviat[...]

[...]

9. RF Gain Uncertainty Test h /I 1 I I I - Figure 2-16. RF Gain Uncertainty Measurement 2-32 Performance Tests[...]

10. IF Gain Uncertainty Test 10. IF Gain Uncertainty Test Related Adjustments Step Gain and 18.4 MHz Local Oscillator Adjustments 21.4 MHz Bandwidth Filter Adjustments Specification Assuming the internal calibration signal is used to calibrate the reference level at -10 dBm and the input attenuator is fixed at 10 dB, any changes in reference level [...]

10. IF Gain Uncertainty Test Equipment Frequency Synthesize r .................................... . HP 3335A Adapter, Type N (m) to BNC (f ) ....................... . HP 1250-0780 Procedure 1. 2. 3. 4. 10 dB Gain Steps 5. 6. 7. 8 9 10. 11. 12. Press ( INSTR pfwm-). Connect CAL OUTPUT to SIGNAL INPUT. Press Cm] 8. Adjust AMPTD CAL for a MARKER ampl[...]

10. IF Gain Uncertainty Test ‘Ihble 2-12. IF Gain Uncertainty, 10 dB Steps [ REFERENCE LEVEL ) Pm) 0 -10 -20 -30 -40 -50 -60 -70 -80 -32 -90 -42 -100 -52 -110 -62 -120 -72 Frequency Synthesizer Amplitude Pm) -2 -12 -22 -32 -42 -52 -62 -72 v 100 100 100 100 100 100 10 10 100 100 10 10 10 Deviation (Marker A Amplitude WV 0 (ref.) Figure 2-18. IF Ga[...]

10. IF Gain Uncertainty Test 2 dB Gain Steps 13. Press QNSTR pREsETj,(jRECALL) 7. 14. Set [ REFERENCE LEVEL] to -1.9 dBm. 15. Press MARKER (OFF). Set CVlDEo] to 100 Hz. 16. Set the frequency synthesizer for an output power level of -3.9 dBm. Set the amplitude increment for 2 dB steps. 17. Press MARKER [ PEAK SEARCH),@ 18. Set the analyzer CREFERENC[...]

10. IF Gain Uncertainty Test 0.1 dB Gain Steps 19. Set [ REFERENCE LEVEL) to 0 dB. 20. Set the frequency synthesizer for an output power level of -2.00 dBm. Set the amplitude increment for 0.1 dB steps. 21. Press MARKER [ PEAK SEARCH),@. 22. Set the analyzer and the frequency synthesizer amplitude according to lkble 2-14. At each setting, note the [...]

10. IF Gain Uncertainty Test ‘Ihble 2-14. IF Gain Uncertainty, 0.1 dB Steps [ REFERENCE LEVEL ) Frequency Deviation Pm) Synthesizer (MKR A Amplitude Amplitude (am) PI 0.0 -2.00 0 (ref) -0.1 -2.10 -0.2 -2.20 -0.3 -2.30 -0.4 -2.40 -0.5 -2.50 -0.6 -2.60 -0.7 -2.70 -0.8 -2.80 -0.9 -2.90 -1.0 -3.00 -1.1 -3.10 -1.2 -3.20 -1.3 -3.30 -1.4 -3.40 -1.5 -3.5[...]

[...]

11. Log Scale Switching Uncertainty Test HKA 100.001 B MHZ HKA 100.001 B MHZ b b REP -9.8 dml REP -9.8 dml ATTEN 10 de ATTEN 10 dB -a.a2 *em -a.a2 *em 2 dB/ 2 dB/ / / I I CENTER 100.000 MHZ CENTER 100.000 MHZ SPAN 100 kHZ SPAN 100 kHZ RES BW 30 kliz RES BW 30 kHz VBW 100 kHz VBW 100 kHz SWP 20.0 nl*ec SWP 20.0 nl*ec Figure 2-20. Log Scale Switc[...]

12. Amplitude Fidelity Test 12. Amplitude Fidelity Test (For instruments with Option 857, refer to Chapter 5.) Related Adjustment Log Amplifier Adjustments Specification Log: Incremental ho.1 dB/dB over 0 to 80 dB display Cumulative 3 MHz to 30 Hz Resolution Bandwidth <kl.O dB max over 0 to 80 dB display (20 - 30°C). 5% 1.5 dB max over 0 to 90 [...]

12. Amplitude Fidelity Test Equipment Frequency Synthesizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 3335A Adapter, Type N (m) to BNC (f) . . . . . . . . . . . . . . . . . . . . . HP 1250-0780 Procedure Log Fidelity 1. Set the frequency synthesizer for an output frequency of 20.000 MHz and an output power level of + 10[...]

12. Amplitude Fidelity Test 8. The fidelity error for amplitude steps from -10 dB to -80 dB should be <& 1.0 dB. 9. The fidelity error at the -90 dB setting should be s&l.5 dB. YKR A 4J REF 9.7 d&n ATTEN 20 dB 10 d0/ L 1 I I 1 I I I I 1 CENTER 20.000 iB0 MHz SPAN 0 nz RES BW I kHZ VBW 1 HT. SWP 300 n..c Figure 2-22. Amplitude Fidelit[...]

12. Amplitude Fidelity Test ‘Ihble 2-17. Linear Amplitude Fidelity Frequency MARKER A Allowable Range Synthesizer Amplitude (f3 % of Reference Level) Amplitude (dB) (W 1 MW 1 Min Max I I I I I I I 0 -10.87 -9.21 -10 -23.10 -17.72 2-44 Performance Tests[...]

13. Average Noise Level Test 13. Average Noise Level Tkst Specification Description Equipment Procedure c-135 dBm for frequencies >I MHz, c-112 dBm for frequencies <l MHz but >500 Hz with 10 Hz resolution bandwidth, 0 dB input attenuation, 1 Hz video filter. Option 001: c-129 dBm for frequencies >l MHz, c-106 dBm for frequencies 51 MHz [...]

13. Average Noise Level Test Figure 2-23. Average Noise Level Measurement 9. Read the average noise level from the DISPLAY LINE readout. The value should be c-112 dBm. dBm 10. Change [ CENTER FREQUENCY ) to 1.001 MHz. Follow the procedure to steps 7 through 9 to determine the average noise level. The value should be c-135 dBm. dBm 11. Change (-CENT[...]

14. Residual Responses Test 14. Residual Responses Test Specification Description Equipment Procedure c-105 dBm for frequencies >500 Hz with 0 dB input attenuation (no signal present at input) Option 100: c-99 dBm for frequencies >500 Hz with 0 dB input attenuation (SIGNAL INPUT 1 only). Option 400: c-95 dBm for frequencies >500 Hz with 0 [...]

14. Residual Responses Test 9. 10. 11. Figure 2-24. Residual Responses Measurement Press SWEEP [SINGLE_) and wait for completion of sweep. Look for any residual responses at or above the display line. If a residual is suspected, press SWEEP CRINGLE) again and see if the response persists. A residual will persist on repeated sweeps, but a noise peak[...]

15. Spurious Responses Test 15. Spurious Responses Test Related Adjustment Second Converter Adjustments Specification For total signal power of c-40 dBm at the input mixer of the analyzer, all image and out-of-band mixing responses, harmonic and intermodulation distortion products are >75 dB below the total signal power for input signals 10 Mhz [...]

15. Spurious Responses Test SPECTRUM ANALYZER SYNTHESIZED SMEEPEA 10 DB ATTENUATOR 300 MHZ LPF J Figure 2-25. Harmonic Distortion Test Setup Note Equipment listed is for two test setups, Figure 2-25 and Figure 2-26. Equipment Synthesized Sweeper ........................ ........... HP 8340A Frequency Synthesizer ...................... HP 3335A 10 d[...]

15. Spurious Responses Test signal for a marker indication of -20.00 dBm (-30.0 dBm at the input mixer with 10 dBm of input attenuation). 6 On the spectrum analyzer, key in MARKER @, CCENTER FREQUENCY ) 560 MHz, MARKER CPEAK SEARCH ) to position a second marker on the peak of the second harmonic distortion product of the 280 MHz input signal. The r[...]

15. Spurious Responses Test Intermodulation Distortion SPECTRUM ANALYZER ATTENUATOR ATTENUATOR DIRECTIONAL 50 MHz LON PASS FILTER Figure 2-26. Intermodulation Distortion Test Setup 11. Connect equipment as shown in Figure 2-26. 12. Set the controls of the spectrum analyzer as follows: CENTER FREQUENCY . . . . . . . . . . . . . . . . . . . . . . . .[...]

15. Spurious Responses Test -0 -10 -20 z E i.i -30 z 3 -40 Q 2 -50 -60 -70 Note If unable to locate intermodulation distortion products, temporarily increase output power level of frequency synthesizer and synthesized sweeper by + 10 dB. Return the output power level of both signal sources to the previous settings before making distortion measureme[...]

15. Spurious Responses Test 24. On the frequency synthesizer, readjust the signal amplitude as necessary to position the peak of the displayed 29.99 MHz signal at the top CRT graticule line. 25. On the spectrum analyzer, key in MARKER @, (CENTER FR E QUENCY ) 30.01 MHz, MARKER ( PEAK SEARCH ) to position a second marker at the peak of the 30.01 MHz[...]

15. Spurious Responses Test 35. On the spectrum analyzer, key in [ CENTER FREQUENCY ] 59 MHz, MARKER [ PEAK SEARCH ) to position a second marker at the peak of the 59 MHz second-order intermodulation distortion product. The response should be below the display line (>75 dB below the total input power). SO1 Distortion (1 MHz separation @ 30 MHz) [...]

16. Residual FM Test Specification <3 Hz peak-to-peak in 110 s; frequency span ~100 kHz, resolution bandwidth 530 Hz, video bandwidth 530 Hz. Description The spectrum analyzer CAL OUTPUT is used to supply a stable 20 MHz signal to the analyzer. The analyzer is tuned in zero span to a point on the 30 Hz bandwidth response for which the slope of t[...]

16. Residual FM Test hr RF -I... L 1u Figure 2-28. Bandwidth Filter Slope Measurement 8. Compute the detection slope of the 30 Hz filter between the markers by dividing the MARKER A amplitude by the MARKER A frequency: filter slope = MARKER A amplitude/MARKER Afrequency = dB/Hz 9. Press SWEEP [CONT),(mj IOFF). 10. Change FREQUENCY SPAN ] to 0 Hz. R[...]

16. Residual FM Test Figure 2-29. Slope Detected Residual FM 11. Press SWEEP CRINGLE) and wait for completion of the sweep. 12. Press MARKER [ PEAK SEARCH _). Press DISPLAY LINE (m’ and position the display line at the lowest point on the trace. Figure 2-30. Peak-to-Peak Amplitude Measurement 2-58 Performance Tests[...]

16. Residual FM Test 13. Press MARKER Ia] and position movable marker at the lowest point on the trace (see Figure 2-30). Read the MARKER A amplitude from the display and record its absolute value. MARKER A amplitude = p-p amplitude = dB 14. Divide the peak-to-peak amplitude by the slope computed in step 8 to obtain the residual FM: p-p amplitude/f[...]

17. Line-Related Sidebands Tests Specification 95 dB below the peak of a CW signal. Option $00: >75 dB below the peak of a CW signal. Description The spectrally pure calibrator signal of the spectrum analyzer is applied to the analyzer input and the line related sidebands near the signal are measured. Equipment None required Procedure 1 . Press [...]

Option 400 1. 2. 3. Press ONSTR PRESET). 4. Key in the following analyzer settings: 5. 6. 7. 17. Line-Related Sidebands Tests Figure 2-31. Line Related Sidebands Measurement Press ~NSTR PRESET ]. Connect CAL OUTPUT to SIGNAL INPUT 2. Press (ml 8 and adjust AMPTD CAL for a MARKER amplitude of -10. 00 dBm l tO.02 dB. [CENTER FREQUENCY] ..............[...]

18. Calibrator Amplitude Accuracy Test Related Adjustment 20 MHz Reference Adjustments Specification -10 dBm f0.3 dB Description The output level of the calibrator signal is measured with a power meter. SPECTRUW ANILYZER Figure 2-32. Calibrator Amplitude Accuracy Test Setup Equipment Power Meter ................................................. HP [...]

19. Fast Sweep Time Accuracy Test (~20 ms) 19. Fast Sweep Time Accuracy Test (430 ms) Related Adjustment None Specification &lo% for sweep times 5100 seconds Description The triangular wave output of a function generator is used to modulate a 500 MHz signal which is applied to the spectrum analyzer SIGNAL INPUT. The signal is demodulated in the[...]

19. Fast Sweep Time Accuracy Test (~20 ms) 5. Press MARKER ( PEAK SEARCHJ@~EFZF),~. 6. Set [ FREQUENCY SPAN ) to 0 Hz, (j-1 to 3 MHz, [VlDEoBW) to 3 MHz, and press TRIGGER Cm]. 7. Set synthesized sweeper for an amplitude-modulated output. 8. Set function generator controls as follows: FUNCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . .[...]

19. Fast Sweep Time Accuracy Test (~20 ms) ‘able 2-18. Fast Sweep Time Accuracy (~20 ms) [ SWEEP TIME ] Function Generator Frequency Sweep Time Error ww (divisions) 5 ms 2.00 f0.02 2 ms 5.00 f0.05 1 ms 10.0 fO.1 200 ps 50.0 Iko.5 100 ,Ls 100 fl Performance Tests 2-65[...]

20. 1st LO Output Amplitude Test Specification >+4 dBm from 2.0 GHz to 3.7 GHz Description The power level at the 1ST LO OUTPUT connected is measured as the first L.O. is swept over its 2.0 GHz to 3.1 GHz range. SPECTRUM ANALYZER POWER METER Figure 2-35. 1st LO Output Amplitude Test Setup Equipment Power Meter ...................................[...]

21. Frequency Reference Error Test 21. Frequency Reference Error Test Related Adjustment Time Base Adjustment Specification Aging Rate <l x 10eg/day and ~2.5 x 10m7 year; attained after 30 days warmup from cold start at 25°C. Temperature Stability <7 x lo-’ 0” to 5E9’C. Frequency is within 1 x lo-” of final stabilized frequency withi[...]

[...]

‘lhble 2-19. Performance Tkst Record Hewlett-Packard Company Model HP 8568B Serial No. IF-Display Section RF Section Tested by Report No. Date Performance Tests 2-69[...]

Tkst 1. Center Frequency Readout Accuracy Test Step 8. Center Frequency Readout Error Test Record Comb Spectrum Analyzer Generator Comb Frequency WW [FREQUENCY SPAN) [ CENT ER FREQUENCY) ww 100 MC EXT TRIG (1, 2, 5, or 10 MHz) trigger signal 1 100 MHz 100 100 MHz 500 100 MHz 1000 10 MHz 100 10 MHz 500 10 MHz 1000 10 MHz 1500 1 MHz 1000 100 kHz 1000[...]

Test 2. Frequency Span Accuracy Test ‘I&t 2. Frequency Span Accuracy Test r n, 1 Spectrum kequency Span 200 Hz 100kHz 100.1 kHz IMHz 1.01 MHz 20 MHz 20.1 MHz 1.5 GHz Steps 7, 9, and 11. Wide Span Error F Analyzer Synthesized Sweeper DUT Measured Center Freq. A Freq. B A Synth Freq. C Freq. D A DUT Frequency Cf-.45 span cf + .45 span P-4 (D-C)[...]

Test 3. Sweep Time Accuracy Step 6. Sweep Time Accuracy, Sweep Times 220 ms [ SWEEP TIME ) Marker A Time Min Measured Max 20 ms 18 ms 22 ms 50 ms 45 ms 55 ms 100 ms 90 ms 110 ms 500 ms 450 ms 550 ms 1s 900 ms 1.10 s Step 12. Sweep Time Accuracy, Sweep Times 220 s 21 Step 19. Sweep Time Accuracy, Sweep Times 220 ms (Alternate Procedure) [ SWEEP TIME[...]

Test 4. Resolution Bandwidth Accuracy ‘I&t 4. Resolution Bandwidth Accuracy Step 8. Bandwidth Accuracy / [REW- 3MHz 1MHz 300kHz 100kHz 30kHz 10kHz 3kHz 1kHz 300Hz 100Hz 30Hz 10Hz [ FREQUENCY SPAN ) 5MHz 2 MHz 500kHz 200kHz 50kHz 20kHz 5kHz 2 kHz 500 Hz 200Hz 100Hz 100Hz MARKER A Readout of 3 ( Min Measured 2.400 MHz 900kHz 270.0 kHz 90.0 kHz [...]

Test 5. Resolution Bandwidth Selectivity Steps 7, 8 and 9. Resolution Bandwidth Selectivity Spectrum Analyl er Measured ( RES] [FREQUHKYWAN J (VIDEOBW] 60 dB Bandwidth Measured Bandwidth Maximum 3 dB Selectivity Selectivity Ratio Bandwidth (60 dB BW t 3 dB BW) 3 MHz 20 MHz 1MHz 15MHz 300 kHz 5 MHz 100 kHz 2 MHz 30 kH z 500 kHz 10 kH z 200 kHz 3 kHz[...]

Test 6. Resolution Bandwidth Switching Uncertainty Test lkst 6. Resolution Bandwidth Switching Uncertainty Test Step 6. Bandwidth Switching Uncertainty 1 MHz 3 MHz 300 kHz 100 kHz 30 kHz 10 kHz 3 kHz 1 kHz 300 Hz 100 Hz 30 Hz 10 Hz ‘FREQUENCY SPAN] 5 MHz 5 MHz 5 MHz 500 kHz 500 kHz 50 kHz 50 kHz 10 kHz 1 kHz 1 kHz 200 Hz 100 Hz Deviation (MKR A R[...]

Test 7. Input Attenuator Switching Uncertainty Test 10 20 30 40 50 60 70 Step 7. Input Attenuator Switching Uncertainty ( REFERENCE LEVEL ] ww -50 -40 -30 -20 -10 0 +lO Frequency Synthesizer Amplitude Wm) -52 -42 -32 -22 -12 -2 8 Deviation (MARKER A Amplitude WV 0 (ref) Corrected Allowable Deviation Deviation ow 0-W 0 (ref) ztl dB *l dB ztl dB kl d[...]

Test 8. Frequency Response Test Test 8. Frequency Respons g& kep 12 15 16 25 26 31 42 48 49 50 Signal Input SIGNAL INPUT 2 (20 MHz to 1.5 GHz) SIGNAL INPUT 1 (20 MHz to 1.5 GHz) SIGNAL INPUT 1 (20 MHz to 500 MHz) SIGNAL INPUT 1 (100 kHz to 20 MHz) SIGNAL INPUT 1 (100 kHz) SIGNAL INPUT 2 (100 kHz to 20 MHz) SIGNAL INPUT 1 (1 kHz to 100 kHz) SIGN[...]

Test 9. RF Gain Uncertainty Test Step 6. 2nd LO Shift Min Measured Max -1.0 dB + 1.0 dB 2-78 Performance Tests[...]

Test 10. IF Gain Uncertainty Test Test 10. IF Gain Uncertainty Test Step 12. Step IF Gain Uncertainty, 10 dB Steps [REFERENCELEVEL] Wm) 0 -2 -10 -12 -20 -22 -30 -32 -40 -42 -50 -52 -60 -62 -70 -72 [SHIFT) [ENTER~B/DIVJJ -80 -32 -90 -42 -100 -52 -110 -62 -120 -72 Frequency Synthesizer Amplitude (dBm) 100 100 100 100 100 100 10 10 100 100 10 10 10 De[...]

Test 10. IF Gain Uncertainty Test [ REFERENCE LEVEL- Wm) Deviation (MKR A Amplitude WV 0.0 -0.1 -0.2 -0.3 -0.4 -0.5 -0.6 -0.7 -0.8 -0.9 -1.0 -1.1 -1.2 -1.3 -1.4 -1.5 -1.6 -1.7 -1.8 -1.9 Step 22. IF Gain Uncertainty, 0.1 dB Steps Frequency Synthesizer Amplitude VW -2.00 0 (ref) -2.10 -2.20 -2.30 -2.40 -2.50 -2.60 -2.70 -2.80 -2.90 -3.00 -3.10 -3.20 [...]

Test 10. IF Gain Uncertainty Test Step 23. Recorded deviations from Step 12. A B Reference Level Range: 0 to -70 dBm -80 to -120 dBm Largest Positive Deviation: dB dB Largest Negative Deviation: dB dB Step 24. Recorded deviations from Steps 18 and 22. C D Step 18 Step 22 Largest Positive Deviation: dB Largest Negative Deviation: dB dB dB Steu I Ste[...]

YLkst 11. Log Scale Switching Uncertainty Tkst Step 6. Log Scale Switching Uncertainty SCALE MKR Amplitude (dB/DIV) PW 1 2 5 10 Deviation Allowable (W Deviation (W 0 (ref) 0 (ref) xto.5 hO.5 f0.5 2-82 Performance Tests[...]

Test 12. Amplitude Fidelity Test Test 12. Amplitude Fidelity ‘I&t Step 6. Log Amplitude Fidelity , Frequency 1 2 Fidelity Error Synthesizer Calibrated MARKER A Amplitude (Column 2 - Column 1: Amplitude Amplitude W) W) Wm) Step +lO 0 (ref) 0 (ref) 0 (ref) 0 -10 -10 -20 -20 -30 -30 -40 -40 -50 -50 -60 -60 -70 -70 -80 -80 -90 Step 14. Linear Amp[...]

Test 13. Average Noise Level Test 2-84 Performance Tests[...]

Test 14. Residual Responses Test Test 14. Residual Responses Test Step 11. Maximum Residual Response Frequency Range 500 Hz to 1500 MHz Option 400: 500 Hz to 2.5 kHz 2.5 kHz to 1500 MHz Measured Measured Max Max Amplitude Frequency -105 dBm -95 dBm -105 dBm Performance Tests 2-85[...]

Tkst 15. Spurious Responses Tkst 21 25 26 34 35 Description Second Harmonic Third Harmonic Third Order Intermodulation Distortion 30 MHz input signals, 1 MHz separation Third Order Intermodulation Distortion 30 MHz input signals, 1 MHz separation Third Order Intermodulation Distortion 30 MHz input signals, 10 kHz separation Third Order Intermodulat[...]

Test 16. Residual FM Test Test 16. Residual FM Test Step 14. Residual FM IMinIMeasuredIrax] Performance Tests 2-87[...]

Tkst 17. Line-Related Sidebands Test Step 7 120 Hz (100 Hz) 180 Hz (150 Hz) 240 Hz (200 Hz) 7. Option 400 400 Hz 800 Hz 1200 Hz Min 1 Measured Max 1 -85 dB -85 dB -85 dB -75 dB -75 dB -75 dB 2-88 Performance Tests[...]

Test 18. Calibrator Amplitude Accuracy Test Test 18. Calibrator Amplitude Accuracy ‘I&t Step 2. CAL OUTPUT Amplitude Min Measured Max -10.3 dBm -9.70 dBm Performance Tests 2.89[...]

Test 19. Fast Sweep Time Accuracy Test (~20 ms) Step 11. F&t Sweep Time Accuracy (~20 ms) [ SWEEP TIME) Function Generator Frequency (kW 5 ms 2.00 kO.02 2 ms 5.00 Iko.05 1 ms 10.0 fO.1 200 ps 50.0 f0.5 100 ps 100 fl 2.90 Performance Tests[...]

Test 20. 1st LO Output Amplitude Test Test 20. 1st LO Output Amplitude Test Step 4. 1st LO Output Level Performance Tests 2-91[...]

Test 21. Frequency Reference Error Test ISteD DescriDtion 1 Min 1 Measured 1 Max 1 4. Frequency (initial) 10. MHz 5. Frequency (after 24 hours) 10. MHz 6. Difference between 4 and 5 Hz 0.01 Hz 2-92 Performance Tests[...]

3 Adjustments Introduction The procedures in this section are for the adjustment of the instrument’s electrical performance characteristics. Warning The procedures require access to the interior of the instrument and therefore should only be performed by qualified service personnel. Refer to Safety Considerations in this introduction. 1. Low Volt[...]

Safety Considerations Although this instrument has been designed in accordance with international safety standards, this manual contains information, cautions, and warnings which must be followed to ensure safe operations and to retain the instrument in safe condition. Service and adjustments should be performed only by qualified service personnel.[...]

‘able 3-l. Adjustment Cross Reference Function Adjusted Low Voltage High Voltage CRT Display (Standard) CRT Display (Digital Storage) IF Gains Log Scales Bandwidth Amplitudes 3 dB Bandwidth 10 MHz Internal Time Base CAL OUTPUT Level Phase Lock Loops Adjustment Procedure 1. Low Voltage Power Supply Adjustments 2. High Voltage Adjustment 3. Prelimi[...]

Related Adjustments Any adjustments which interact with, or are related to, other adjustments are indicated in the adjustments procedures. It is important that adjustments so noted are performed in the order indicated to ensure that the instrument meets specifications. Location of lkst Points and Adjustments Illustrations showing the locations of a[...]

‘Ihble 3-2. Adjustable Components Reference Designator AlA2C308 AlA2R308 AlA2R319 AlA2R409 AlA2R426 AlA2R427 AlA2R437 AlA2R440 AlA2R512 AlA2R513 AlA2R515 AlA2R517 AlA3R14 AlA4C204 AlA4C209 AlA4R227 AlA4R219 AlA4R217 AlA5C104 AlA5C109 AlA5R127 AlA5R120 AlA5R117 AlA6R9 AlA6R103 Adjustment Name c307 ZHF GAIN INT GAIN FOCUS COMP T/B FOC T/B CTR R/L F[...]

‘Ihble 3-2. Adjustable Components (continued) Reference Designator A3AlR34 Adjustment Name SWEEP OFFSET Adjustment Number 25 Adjustment Function Adjusts digital sweep to begin at left edge of graticule. A3A2R12 LL THRESH 25 Adjusts point at which graticule lines switch from short to long lines. A3A2R50 XS&H 25 Adjusts horizontal sample and ho[...]

‘able 3-2. Adjustable Components (continued) Reference Designator A4A4C9 Adjustment Name SYM Adjustment Number 8 Adjustment Function A4A4C19 LC CTR 8 A4A4C20 CTR 8 A4A4C39 SYM 8 A4A4C4 1 LC DIP 8 A4A4C43 LC DIP 8 A4A4C65 SYM 8 Centers A4A4 bandwidth filter crystal pole #l symmetry. Centers A4A4 bandwidth filter LC pole #l. Centers A4A4 bandwidth [...]

Table 3-2. Adjustable Components (continued) Reference Designator A4A7C42 A4A7R30 Adjustment Name CTR 10 Hz AMPTD Adjustment Number 7 7 Adjustment Function Centers 3 MHz bandwidth filter pole #5. Adjusts 3 MHz bandwidth filter 10 Hz bandwidth amplitude. A4A7R4 1 10 Hz AMPTD 7 Adjusts 3 MHz bandwidth filter 10 Hz bandwidth amplitude. A4A8C13 SYM 8 A[...]

‘Ih.ble 3-2. Adjustable Components (continued) Reference Designator AGAlORl A6AlOR9 A6AlOR12 A6AlOR15 A6AlOR18 A6AlOR21 A6AlOR23 A6AlOR25 A6AlOR27 A6AlOR29 A6AlOR31 A6AlOR34 A6AlOR37 A6AlOR40 A6AlOR41 A6AlOR42 A6AlOR70 A6AlOR76 A6AlOR81 A6Al lR48 A6Al lR51 A6A 1 lR54 A6Al lR57 A6Al lR60 A6Al lR66 A6Al lR69 A6Al lR72 A6Al lR75 A6A 1 lR78 A6Al lR84[...]

‘Ihble 3-2. Adjustable Components (continued) Reference Designator A6A12R82 A6A12R83 A6A12R84 A6A12R85 A6A12R98 A6A12R113 A7A2C 1 A7A2C2 A7A2C3 A7A2C4 A7A4AlAlCl A7A4AlAlC5 A8R2 AlOAlL7 A10AlL8 AlOASLll AlOA3L12 AlOA3L13 AlOA4C50 AlOA4Lll AlOA4L16 AlOA4L17 AlOA5R2 AlOA5R4 AlOA8R4 AlOA8R9 AlOA8R25 AlOA8R27 Al lA2R2 Adjustment Adjustment Name Numbe[...]

‘lhble 3-2. Adjustable Components (continued) Reference Adjustment Adjustment Adjustment Function Designator Name Number AllA5Cl IMPEDANCE 16 Optimizes sampler output. MATCH Al lA5C2 IMPEDANCE 16 Optimizes sampler output. MATCH Al lA5Rl IF GAIN 13 Adjusts level of 30 MHz output. A16R62 OFFSET 13 Adjusts scan ramp offset. A16R67 SWEEPTIME 13 Adjus[...]

‘Ihble 3-2. Adjustable Components (continued) Reference Adjustment Adjustment Adjustment Function Designator Name Number AlA2R31 ORTHO 3 Sets orthogonality of CRT. AlA2R32 PATTERN 3 Adjusts for optimum rectangular shape of CRT display. AlA2R35 INTENSITY 3 Sets adjustment range of front-panel INTENSITY control. LIMIT AlA2R36 ASTIG 3 Adjusts astigm[...]

‘Ihble 3-3. Factory-Selected Components Reference Designator AlA2R9 A3AlR72 A3A2R17 A3A2R2 1 A3A3C27 A3A3C32 A3A3R47 A3A3R48 A4AlRlO A4A 1 R67 A4A2R18 A4A2R22 A4A2R24 A4A2R36 A4A2R62 A4A2R86 A4A2R88 A4A2R89 A4A2R96 A4A2R97 A4A2R99 A4A3C5 1 A4A3C52 A4A3C53 A4A3R15 A4A3R25 A4A3R29 A4A3R35 A4A3R38 A4A3R47 A4A3R54 A4A3R66 Adjustment Procedure Range o[...]

l’hble 3-3. Factory-Selected Components (continued) Reference Designator A4A3R74 A4A3R79 A4A3R80 A4A3R8 1 A4A4ClO A4A4C17 A4A4C38 A4A4C66 A4A4C70 A4A4C92 A4A4C97 A4A4C99 A4A4ClOO A4A4ClOl A4A4R3 A4A4R16 A4A4R20 A4A4R35 A4A4R40 A4A4R42 A4A4R44 A4A4R45 A4A4R60 A4A4R64 A4A4R65 A4A4R94 A4A5C9 A4A5RlO A4A5R62 A4A5R70 A4A5R86 A4A6A2R33 A4A7C5 A4A7C12 A[...]

‘Ihble 3-3. Factory-Selected Components (continued) Reference Designator A4A7R13 A4A7R23 A4A7R24 A4A7R34 A4A7R35 A4A7R45 A4A7R46 A4A7R56 A4A7R57 A4A7R60 A4A7R66 A4A7R68 A4A7R70 A4A7R72 A4A7R74 A4A7R76 A4A7R78 A4A7R80 A4A7R82 A4A7R84 A4A7R86 A4A7R88 A4A7R90 A4A7R92 A4A7R94 A4A7R96 A4A7R98 A4A7RlOO A4A7R102 A4A7R104 A4A8C 14 A4A8C35 A4A8C43 A4A8C49[...]

Ifable 3-3. Fhctory-Selected Components (continued) Reference Designator A4A8R19 A4A8R24 A4A8R26 A4A8R29 A4A8R30 A4A8R34 A4A8R36 A4A8R36 A4A8R52 A4A8R55 A4A9R3 A4A9R6 A4A9R7 A4A9RlO A4A9R 11 A4A9R46 A4A9R48 A4A9R50 A4A9R52 A4A9R55 A4A9R57 A4A9R59 A4A9R70 A4A9R72 A4A9R74 A4A9R83 A4A9R84 A4A9R85 A4A9R86 A4A9R87 Adjustment Procedure Range of Values (0[...]

‘Ihble 3-3. Factory-Selected Components (continued) Reference Designator A6A9AlR5 AGASAlRlC A6A9AlR27 A6AlOR86 A6AlOR87 A6AlOR88 A6AlOR89 A6AlOR90 A6AlOR91 A6Al lR2 ABAlBCl A6A12C2 A6A12C3 A6A12Cll A6A 12C23 A6A12R64 A7A2C8 A7A2L4 A7A2R3 A7A2R67 A7A2R68 A7A2R69 A8R6 AlOA3C26 AlOA4C49 AlOA4C49 AlOA4R29 AlOA4R33 Adjustment Procedure 18 19 18 21 21 [...]

‘able 3-3. Factory-Selected Components (continued) Reference Adjustment Range of Values Function of Component Designator Procedure (0 or PF) Al lA4R24 348 to 562 Sets YTO loop gain crossover to 20 &2 kHz. Al lA5C22 16 130 to 220 pF Sets YTO loop response ~20 MHz. AllA5LlO 16 2.2 to 3.3 ,uF Sets YTO loop response. Al lA5R22 16 15 to 51.1 n Set[...]

‘able 3-3. Factory-Selected Components (continued) Reference Adjustment Range of Values Designator Procedure (0 or PF) Function of Component Option 462 A4A7R12 5.62 K to 7.5 K A4A7R13 5.62 K to 7.5 K A4A7R23 5.62 K to 7.5 K A4A7R24 5.62 K to 7.5 K A4A7R34 5.62 K to 7.5 K A4A7R35 5.62 K to 7.5 K A4A7R45 5.11 K to 6.81 K A4A7R46 5.11 K to 6.81 K A4[...]

‘lkble 3-4. Standard Value Replacement Capacitors r apa Type: Tubular Range: 1 to 24 pF filerance: 1 to 9.1 pF = f0.25 pF ors Type: Dipped Mica Range: 27 to 680 pF Tolerance: *5% Value (pF) 1 BP Fart Number CD - 1.0 0160-2236 8 1.2 0160-2237 9 1.5 0150-0091 8 1.8 0160-2239 1 2.0 0160-2240 4 2.2 0160-2241 5 2.4 0160-2242 6 2.7 0160-2243 7 3.0 0160[...]

‘lhble 3-5. Standard Value Replacement 0.125 Resistors Resistors Type: Fixed-Film Range: 10 to 46413 Ohms Wattage: 0.125 at 125’C Tolerance: fl.O% Value (n) EP Fart Number 10.0 0757-0346 11.0 0757-0378 12.1 0757-0379 13.3 0698-3427 14.7 0698-3428 16.2 0757-0382 17.8 0757-0294 19.6 0698-3429 21.5 0698-3430 23.7 0698-3431 26.1 0698-3432 28.7 0698[...]

‘Ihble 3-5. Standard Value Replacement 0.125 Resistors (continued) Resistors Type: Fixed-Film Range: 10 to 464K Ohms Wattage: 0.125 at 125°C Value (0) To1 BP Part Number ‘an co - 17.8K 0698-3136 8 19.6K 0698-3157 3 21.5K 0757-0199 3 23.7K 0698-3158 4 26.1K 0698-3159 5 28.7K 0698-3449 6 31.6K 0698-3160 8 34.8K 0757-0123 3 38.3K 0698-3161 9 42.2[...]

Table 3-6. Standard Value Replacement 0.5 Resistors Resistors Type: Fixed-Film Range: 10 to 1.47M Ohms Wattage: 0.5 at 125’C Value (fl) BP Part Number ‘ant 56 - 31.0% Value (0) EIP Fart Number 5 - 10.0 0757-0984 4 383 0698-3404 3 11.0 0575-0985 5 422 0698-3405 4 12.1 0757-0986 6 464 0698-0090 7 13.3 0757-0001 6 511 0757-0814 9 14.7 0698-3388 2 [...]

Ihble 3-6. Standard Value Replacement 0.5 Resistors (continued) Resistors Value (0) 16.2K 17.8K 19.6K 21.5K 23.7K 26.lK 28.7K 31.6K 34.8K 38.313 42.2K 46.413 51.1K 56.2K 61.9K 68.1K 75.OK 82.5K 90.9K 1OOK 110K 121K 133K 147K Type: Fixed-Film Range: 10 to 1.47M Ohms Wattage: 0.5 at 125°C To1 EIP Fart Number e *an CD - fl.O% Value (a) EIP Fart Numbe[...]

1. Low-Voltage Power Supply Adjustments 1. Low-Voltage Power Supply Adjustments Reference IF-Display Section: AlA f15 V Regulator AlA + 120 V, +5.2 V Regulator (Serial Number Prefix 3004A and above) AlA + 100 V, +5.2 V Regulator (Serial Number Prefix 3001A and below) RF Section: A24 Voltage Regulator Description The + 15 V supply is adjusted for th[...]

1. Low-Voltage Power Supply Adjustments 4. Connect the DVM to AlA6TP3 on the IF-Display Section. DVM indication should be + 15.000 fO.O1O V dc. If the voltage is out of tolerance, adjust AlA6R9 + 15 V ADJ for the specified voltage. , AlA71P2 AlA6DS2 AlA6TP4 5 Figure 3-2. IF-Display Section Low-Voltage Adjustments (SN 3001A and Below) t Figure 3-3. [...]

1. Low-Voltage Power Supply Adjustments 7. Verify that the + 120 V indicator AlA7DS2 (yellow LED) is lit. Note On IF-Display Sections serial prefixed 3001A and below, indicator AlA7DS2 is a + 100 V indicator. 8. Connect the DVM to AlA7TP3. DVM indication should be + 120.0 ~k3.0 V dc. The + 120 V supply is referenced to the + 15 V supply; therefore,[...]

1. Low-Voltage Power Supply Adjustments supply, therefore, if the +5V supply is out of tolerance, a circuit malfunction is indicated. 17. The -5V indicator A24DS6 (yellow LED) should be lit. 18. Connect the DVM to A24TP7. The DVM indication should be -5.200 ho.050 V de. The -5V supply is referenced to the +2OV supply, therefore, if the -5V supply i[...]

2. High-Voltage Adjustment (SN 3001A and Below) 2. High-Voltage Adjustment (SN 3001A and Below) Note Note Reference Description Warning This procedure is for IF-Display Sections with serial number prefixes 3001A and below. The procedure for serial prefixes 3004A and above is located immediately after this procedure. This procedure should be perform[...]

2. High-Voltage Adjustment (SN 3001A and Below) DIGITIZING OSCILLOSCOPE HI-VOLTAGE SIGNAL ANALYZER Figure 3-5. High Voltage Adjustment Setup Equipment Digital Voltmeter (DVM) ................................... .HP 3456A DC High-Voltage Probe (1000: 1 divider) .................. HP 34111A Display Adjustment PC Board (service accessory) ...... .8566[...]

2. High-Voltage Adjustment (SN 3001A and Below) Note The accuracy of the high-voltage probe is specified for a probe connected to a dc voltmeter with 10 M62 input resistance. HP 3456A and HP 3455A digital voltmeters have a 10 MQ input resistance on the 100 V and 1000 V ranges. All measurements in this procedure should be performed with the DVM manu[...]

2. High-Voltage Adjustment (SN 3001A and Below) Warning With the protective cover removed in the following step, do not place hands near the AlA High-Voltage assembly. High voltage (approximately -4000 V dc) can be present even when the ac line cord is disconnected. 10. Wait at least one minute for capacitors to discharge to a safe level. 11. Remov[...]

2. High-Voltage Adjustment (SN 3001A and Below) If the calibration factor calculated in step 8 is 0.00099, and AlA3Tl is labeled for -3875 V, then adjust AlA6R32 HV ADJ for a DVM indication of: 0.00099 x (-3875 V) = -3.836 V dc 16. With the front-panel INTENSITY control fully counterclockwise, wait approximately 30 minutes to allow the high-voltage[...]

2. High-Voltage Adjustment (SN 3001A and Below) 27. On the oscilloscope press [SHOW]. 28. Connect the oscilloscope channel 1 probe to AlA3TP5 using a long probe extension. See Figure 3-7 for the location of AlA3TP5. 29. Reconnect the ac line cords to each instrument section. Adjust the front-panel INTENSITY control fully counter-clockwise, and then[...]

2. High-Voltage Adjustment (SN 3001A and Below) 34. On the oscilloscope, adjust the channel 1 offset voltage as necessary to measure the peak-to-peak CRT cut-off voltage, V,,, at AlA3TP5. See Figure 3-9. This peak-to-peak voltage should be between 45-75 V,.,. Note this voltage for use in step 39. 1 10.0 V/div offset: 60.00 v 10.00 : 1 dc -250.000 u[...]

2. High-Voltage Adjustment (SN 3001A and Below) 39. Slowly adjust the front-panel INTENSITY control through its entire range while monitoring the peak-to-peak voltage at AlA3TP5. As the INTENSITY control is turned clockwise, the peak-to-peak voltage at AlA3TP5 will drop. To prevent long-term CRT damage, this voltage should not drop below (V,, - 5O)[...]

2. High-Voltage Adjustment (SN 3001A and Below) AlA4, and AlA assemblies function properly and do not require compensation, proceed directly to adjustment procedure 4, “Final Display Adjustments (SN 3001A and Below)“. Discharge Procedure The adjustment procedures in this manual do not require the removal for High Voltage and or discharge of the[...]

2. High-Voltage Adjustment (SN 3001A and Below) 5. While holding the insulated handle of the screwdriver, touch the grounded blade to the following connections: a. Both brown wires going to the rear of the CRT from AlA via cable harness W21. b. The yellow, blue, and orange wires in the same cable as “a. ” above. c. The top lead of each of the 1[...]

2. High-Voltage Adjustment (SN 3004A and Above) 2. High-Voltage Adjustment (SN 3004A and Above) Note This procedure is for IF-Display Sections with serial number prefixes 3004A and above. The procedure for serial prefixes 3001A and below is located immediately before this procedure. Note This procedure should be performed whenever the AlVl CRT or A[...]

2. High-Voltage Adjustment (SN 3004A and Above) Equipment High-Voltage Adjustment Procedure Warning Warning Digital Voltmeter (DVM) ................................... .HP 3456A DC High-Voltage Probe (1000: 1 divider) .................. HP 34lllA In the following procedure, it is necessary to probe voltages which, if contacted, could cause serious [...]

2. High-Voltage Adjustment (SN 3004A and Above) AlA HIGH / VOLTAGE REGULATOR / AlABOSl - AlA7TP3 - AlA6R103 Figure 3-13. Location of High Voltage Adjustments 4. Set the LINE switch to ON. Set the front-panel INTENSITY control fully counterclockwise (CRT beam at cut-off) to prevent possible damage to the CRT. 5. Note the DVM indication at AlA7TP3. D[...]

2. High-Voltage Adjustment (SN 3004A and Above) 11. Remove the protective cover from the AlA High-Voltage Regulator Assembly. A label should be visible on the AlA3Al High Voltage Assembly. (AlASAl is mounted on the non-component side of the High-Voltage Regulator Assembly as shown in Figure 3-14.) Record the voltage listed on the label for use in s[...]

2. High-Voltage Adjustment (SN 3004A and Above) 16. With the front-panel INTENSITY control fully counter clockwise, wait approximately 10 minutes to allow the high-voltage supply to stabilize and the CRT to normalize. This sofl turn-on will extend CRT life expectancy, particularly if a new CRT has just been installed. 17. Readjust AlA6R103 HV ADJ f[...]

2. High-Voltage Adjustment (SN 3004A and Above) 3. Connect one end of a jumper wire (made of insulated wire and two alligator clips) to the blade of the screwdriver. Connect the other end of the jumper wire to the metal chassis of the IF Display Section. This grounds the screwdriver. 4. Slide the screwdriver’s blade between the CRT and the sheet [...]

3. Preliminary Display Adjustments (SN 3001A and Below) 3. Preliminary Display Adjustments (SN 3001A and Below) Reference AlAl Keyboard AlA Z-Axis Amplifier A1 A4 X-Deflection Amplifier AlA Y-Deflection Amplifier Note Note Adjustment 2, “High-Voltage Adjustment,” should be performed before performing the following adjustment procedure. Perform [...]

3. Preliminary Display Adjustments (SN 3001A and Below) Procedure X and Y Deflection 1. Connect a 10:1 (10 MQ) divider probe to the oscilloscope’s channel Amplifier Pulse 1 input and a 10: 1 divider probe to the channel 4 input. Response Adjustments 2. On the oscilloscope, press CRECALL) [m l to perform a soft reset. 3. On the oscilloscope, press[...]

3. Preliminary Display Adjustments (SN 3001A and Below) A1A5, AlA4- AlA2’ - A3A2 Figure 3-17. Location of AlA2, AlA4, AlA5, and A3A2 R22 HF G(lN f f$ GA I id “1: Ry R28 HF GAI N , ~000uu000000u00ur AlA AlA4/AlA5 Figure 3-18. AlA2, AlA4, and AlA Adjustment Locations 10. Set the Pulse/Function Generator controls as follows: MODE . . . . . . . . .[...]

[...]

3. Preliminary Display Adjustments (SN 3001A and Below) 16. Three waveforms should be displayed on the oscilloscope, as shown in Figure 3-20. The lower composite waveform represents the combined X deflection voltage applied to the CRT. Use the oscilloscope’s front-panel knob to adjust waveform fl sensitivity for approximately 8 vertical divisions[...]

3. Preliminary Display Adjustments (SN 3001A and Below) 19. Connect the oscilloscope’s channel 1 probe to AlA5El and the channel 4 probe to AlA5E2. See Figure 3-18 for the location of the test points. Connect the output of the pulse/function generator to 52 (Y input) on the Display Adjustment PC board in the A3A2 slot. 20. The Y Deflection Amplif[...]

3. Preliminary Display Adjustments (SN 3001A and Below) 28. Set the oscilloscope controls as follows: Press @iK]: Channel 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . on amplitude scale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6.2 5 V/div Press @iZZQ. 29. Adjust AlA4R7 X POS and AlA5R[...]

3. Preliminary Display Adjustments (SN 3004A and Above) Reference AlAl Keyboard Al A2 X, Y, Z Axis Amplifier Note Adjustment Procedure 2, “High-Voltage Adjustment,” should be performed before performing the following adjustment procedure. Note Perform this adjustment only if components have been replaced on the AlA X, Y, Z Axis Amplifier Assemb[...]

3. Preliminary Display Adjustments (SN 3004A and Above) Procedure X and Y Deflection 1. Connect a 1O:l (10 MQ) divider probe to the oscilloscope’s channel Amplifier Pulse 1 input and a 1O:l divider probe to the channel 4 input. Response Adjustments 2. On the oscilloscope, press (RECALL) (CLEARI) to perform a soft reset. 3. On the oscilloscope, pr[...]

3. Preliminary Display Adjustments (SN 3004A and Above) AlA A3A2 A3Al Figure 3-24. Location of AlA and A3A2 TP5Ol R127 P120 Cl09 TP105 R227 c204 R220 R217 J5 GEID c307 Figure 3-25. AlA Adjustment Locations 10. Set the Pulse/Function Generator controls as follows: MODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .[...]

3. Preliminary Display Adjustments (SN 3004A and Above) 12. Set the oscilloscope controls as follows: Press [CHAN]: Channel 1 ................................................... . on amplitude scale ...................................... 10.0 V/div offse t ............................................. . ..25.000 0 V Channel 4 ......................[...]

3. Preliminary Display Adjustments (SN 3004A and Above) the combined X deflection voltage applied to the CRT. Use the oscilloscope’s front-panel knob to adjust waveform fl sensitivity for approximately 8 vertical divisions. hp running .I : 1 20.0 V/div offset: 25.00 V ~:~. ..:.. :::. .:. ::.:::::.::.:::.. ~~~..~I;::r~i~~~-:1. .: -125.000 ns 125.0[...]

19. 20. Pulse Response of 21. Control Gate Z Amplifier to BLANK Input 22. 23. 24 . Set the oscilloscope controls as follows: Note 25. 3. Preliminary Display Adjustments (SN 3004A and Above) Connect the oscilloscope’s channel 1 probe to AlA2TP104 and the channel 4 probe to AlA2TP105. See Figure 3-25 for the location of the test points. Connect the[...]

3. Preliminary Display Adjustments (SN 3004A and Above) 29. Set the oscilloscope controls as follows: Press (CHAN]: Channel 1 . . . . . . . . . . on amplitude scale . . . . . . . .8.00 V/div Press @KiX-]. 30. Adjust the spectrum analyzer’s front-panel INTENSITY control for 50V peak-to-peak (8 divisions) as indicated on the oscilloscope. See Figur[...]

4. Final Display Adjustments (SN 3001A and Below) 4. Final Display Adjustments (SN 3001A and Below) Reference Description Note Procedure Note AlAl Keyboard AlA Z Axis Amplifier AlA X Deflection Amplifier AlA Y Deflection Amplifier This procedure is used to optimize the appearance of the CRT display during routine maintenance or after CRT replacemen[...]

4. Final Display Adjustments (SN 3001A and Below) 5. For best overall focusing of the display, adjust the following potentiometers in the sequence listed below: a. AlA3R14 FOCUS LIMIT for best focus of graticule lines (long vectors) b. AlA2R36 ASTIG c. AlA2R30 FOCUS GAIN for best focus of annotation (short vectors) 6. Adjust AlA2R31 ORTHO, the fron[...]

4. Final Display Adjustments (SN 3004A and Above) 4. Final Display Adjustments (SN 3004A and Above) Reference Description Equipment Procedure Note AlAl Keyboard AlA X, Y, Z Axis Amplifiers This procedure is used to optimize the appearance of the CRT display during routine maintenance or after CRT replacement or minor repairs. First, the display is [...]

4. Final Display Adjustments (SN 3004A and Above) RI20 R220 R512 R513 R319 R426 R437 Figure 3-32. Location of Final Display Adjustments on AlA ‘Ihble 3-6. Initial Adjustment Positions Adjustment AlA R120 Y GAIN AlA R127 Y POSN AlA R220 X GAIN AlA R227 X POSN AlA R319 INT GAIN AlA R409 FOCUS COMP AlA R426 T/B FOC Al A2 R427 T/B CTR Al A2 R437 R/L [...]

8. 9. 10. 11. 4. Final Display Adjustments (SN 3004A and Above) For an initial coarse focus, adjust the following potentiometers in the sequence listed: AlA3R14 FOCUS LIMIT AlA2R517 ASTIG AlA2R513 3D AlA2R409 FOCUS COMP Press QNSTR PRESET ), then adjust the reference level to bring the displayed noise to the top division of the graticule. Press C E[...]

4. Final Display Adjustments (SN 3004A and Above) 17. Adjust AlA2R512 ORTHO and the front-panel ALIGN control to optimize the orientation and appearance of the rectangular graticule pattern on the CRT display. 18. Repeat steps 13 through 17 as needed to optimize overall display focus and appearance. 3-64 Adjustments[...]

5. Log Amplifier Adjustments 5. Log Amplifier Adjustments Reference Related Performance Tests Note IF-Display Section A4A3 Log Amplifier-Filter A4A2 Log Amplifier-Detector Scale Fidelity Test The A4A3 Log Amplifier-Filter and A4A2 Log Amplifier Detector are temperature compensated as a matched set at the factory. In the event of a circuit failure, [...]

5. Log Amplifier Adjustments 4. Connect DVM to A4AlTPl and DVM ground to the IF casting. Connect the frequency synthesizer to the RF INPUT. Key in CFREQUENCY) 80 MHz and [ AMPLITUDE ) -86.98 dBm. The frequency synthesizer will now provide a 5OfI load. Offset Adjustment Check 5. Adjust A4A2R79 ZERO for 0.0000 f0.0005 V dc. See Figure 3-34 for locati[...]

5. Log Amplifier Adjustments Bandpass Filter Amplitude Adjustment 9. Connect one end of a jumper wire to A4A3TP8. Connect the other end of the jumper to A4A3TP7 (+ 15V). Connecting the jumper to A4A3TP8 first reduces the chance of shorting the + 15V to ground. Note DVM indication. V dc 10. Remove the short from between A4A3TP7 and A4A3TP8. 11. Adju[...]

5. Log Amplifier Adjustments 23. Decrease the frequency synthesizer’s output level 10 dB. Press CREFERENCE LEVEL ) 0 dBm, and adjust the frequency synthesizer’s output level for a DVM indication of + 1.00 k.001 Vdc. 24. Verify that attenuator is set at 10 dB. Decrease the frequency synthesizer output level by 10 dB. Press [ REFERENCE LEVEL ] -6[...]

6. Video Processor Adjustments 6. Video Processor Adjustments Reference Related Performance Test Description IF-Display Section A4A 1 Video Processor Log Scale Switching Uncertainty Test The CAL OUTPUT signal is connected to the RF INPUT through a step attenuator. The instrument is placed in zero frequency span to produce a dc level output from the[...]

6. Video Processor Adjustments 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. Set step attenuator to 120 dB. DVM indication should be 0.000 *0.0005 V dc. (If DVM indication is out of tolerance, adjust A4A2R79 ZERO on the log amplifier-detector board..) Set step attenuator to 0 dB. Key in [Reference LWI) and adjust DATA knob for DVM indication as close to [...]

6. Video Processor Adjustments 22. Decrease reference level to -70 dBm using the step key. 23. DVM indication should be +0.200 l 0.002 V dc greater than the indication recorded in step 19. If not, readjust A4AlR2 LG OS. 24. Decrease reference level to -90 dBm using the step key. 25. DVM indication should be +0.400 f0.004 V dc greater than the indic[...]

7. 3 MHz Bandwidth Filter Adjustments Reference IF-Display Section A4A7 3 MHz Bandwidth Filter Related Performance Resolution Bandwidth Switching Uncertainty Test Test Resolution Bandwidth Selectivity Test Description With the CAL OUTPUT signal connected to the RF INPUT, the 18.4 MHz oscillator can be adjusted with the FREQ ZERO control (on the fro[...]

Procedure 1. Position instrument upright as shown in Figure 3-37 and remove top cover. 2. Set LINE switch to ON and press ~NSTR PRESET ). 7. 3 MHz Bandwidth Filter Adjustments Frequency Zero Check 3. Connect CAL OUTPUT signal to RF INPUT 4. Key in IRECALL) @. 5. Adjust front panel FREQ ZERO control for maximum signal amplitude on the CRT display. F[...]

7. 3 MHz Bandwidth Filter Adjustments 10. Adjust A4A7C15 CTR for minimum amplitude of signal peak. Adjust A4A7C14 SYM for best symmetry. Repeat adjustments to ensure that the signal is nulled and adjusted for best symmetry. See Figure 3-38 for location of adjustments. 11. Remove crystal filter bypass network near C23 SYM. 12. Adjust A4A7C24 CTR for[...]

7. 3 MHz Bandwidth Filter Adjustments 25. Adjust A4A7C13 PK for maximum peak-to-peak signal on Channel 2 display. See Figure 3-39 for location of adjustment. If unable to achieve a “peak” in signal amplitude, increase or decrease value of A4A7C12. Refer to Table 3-3 for range of values. A4A7 3 MHz Bandwidth Filter Figure 3-39. Location of 3 MHz[...]

7. 3 MHz Bandwidth Filter Adjustments 10 Hz Amplitude Adjustments 37. 38. 39. 40. 41. 42. 43. Connect CAL OUTPUT to RF INPUT. Key in [INSTR PRESET ), [mj 9, (jEEki-- 10 Hz. Adjust the instrument front panel FREQ ZERO control for maximum signal amplitude on the CRT display. Key in CREs] 1 kHz and DISPLAY LINE [ENTER). Using the DATA knob, place the [...]

8. 21.4 MHz Bandwidth Filter Adjustments 8. 21.4 MHz Bandwidth Filter Adjustments Reference Related Performance Tests Description IF-Display Section A4A4 Bandwidth Filter A4A8 Attenuator-Bandwidth Filter IF Gain Uncertainty Test Resolution Bandwidth Switching Uncertainty test Resolution Bandwidth Selectivity Test First the LC Filters (100 kHz to 3 [...]

8. 21.4 MHz Bandwidth Filter Adjustments Equipment Digital Voltmeter (DVM) . . . . . . . . . . . . . . . . . . . . . . . .HP 3456A 10 dB Step Attenuato r . . . . . . . . . . . . . . HP 355D, Option H89 1 dB Step Attenuato r . . . . . . . . . . . . . . . HP 355C, Option H25 Crystal Filter Bypass Network (2 required ) . . . . Refer to Figure 3-91 Pro[...]

8. 21.4 MHz Bandwidth Filter Adjustments 10. Key in CRESBW_) 1 MHz, and ISPAN) 1 MHz. 11. Press MARKER CPEAK SEARCH ], MARKER a. 12. Key in CREsBW) 100 kHz, [-SPAN) 200 kHz, and MARKER [ PEAK SEARCH). 13. Adjust A4A4R43 LC to align markers on display. MARKER A level should indicate 1.00 X. See Figure 3-41 for location of adjustment. 14. Repeat step[...]

8. 21.4 MHz Bandwidth Filter Adjustments 22. Adjust A4A4C73 CTR to center signal on center graticule line. Adjust A4A4C65 SYM for best symmetry of signal. See Figure 3-42 for location of adjustments. If unable to adjust A4A4C65 SYM for satisfactory signal symmetry, increase or decrease value of A4A4C66. Refer to Table 3-3 for range of values. 23. A[...]

8. 21.4 MHz Bandwidth Filter Adjustments 33. Key in t-1 100 kHz, C-1 200 kHz, and MARKER [ PEAK SEARCH]. 34. Adjust A4A8R35 LC to align makers on display. MARKER A level should indicate 1.00 X. See Figure 3-43 for location of adjustment. 35. Repeat steps 31 through 34 until no further adjustment is necessary. A4A8 XTAL Adjustments 36. Key in @TFTiT[...]

8. 21.4 MHz Bandwidth Filter Adjustments 45. LC 46. 47. 48. 49. 50. 51. 52. 53. 54. 55. 56. 57. 58. 59. 60. 61. Adjust A4ABR40 XTAL to align markers on display. MARKER A level should indicate 1.00 X. See Figure 3-44 for location of adjustment. Dip Adjustments Refer to the Resolution Bandwidth Switching Uncertainty Performance Test, and check all ba[...]

62. 63. 64. 65. 66. 67. 8. 21.4 MHz Bandwidth Filter Adjustments approximately -17 kHz (to the left). If unable to achieve a “dip” in signal amplitude, increase or decrease value of A4ABR30. Refer to ‘&ble 3-3 for range of values. Remove short from A4ABTP6 and short A4ABTP3 to ground. Adjust A4ABC67 LC DIP for minimum amplitude of signal [...]

9. 3 dB Bandwidth Adjustments Reference Related Performance Test Description IF-Display Section A4A9 IF Control Resolution Bandwidth Accuracy Test The CAL OUTPUT signal is connected to the RF INPUT. Each of the adjustable resolution bandwidths is selected and adjusted for the proper bandwidth at the 3 dB point. Note Do not perform this adjustment o[...]

9. 3 dB Bandwidth Adjustments A4A9 IF CONTROL Figure 3-45. Locatio n of 3 dB Bandwidth Adjustments A4A3 9. Press MARKER a. Adjust marker to 3 dB point on opposite side of signal (CRT MKR A annotation indicates 1.00 X). There are now two markers; one on each side of the signal at the 3 dB points. 10. CRT MKR A annotation now indicates the 3 dB ban[...]

9. 3 dB Bandwidth Adjustments 22. CRT MKR A annotation now indicates the 3 dB bandwidth of the 300 kHz bandwidth. 3 dB bandwidth should be 300.0 f30.0 kHz. 23. Key in @GZVBW) 10 kHz and [ FREQUENCY SPAN) 20 kHz. If necessary, readjust PREFERENCE LEVEL] and [ CENTER FREQUENCY ), using DATA knob to place signal peak near top of graticule and centered[...]

10. Step Gain and 18.4 MHz Local Oscillator Adjustments 10. Step Gain and 18.4 MHz Local Oscillator Adjustments Reference Related Performance Tests Description IF-Display Section A4A7 3 MHz Bandwidth Filter A4A5 Step Gain Resolution Bandwidth Selectivity Test IF Gain Uncertainty Test Center Frequency Readout Accuracy Test First, the IF signal from [...]

10. Step Gain and 18.4 MHz Local Oscillator Adjustments Equipment Digital Voltmeter (DVM) ........................ HP 3456A Power Meter ................................. ..HP436 A Power Sensor .................................. HP 8481A 10 dB Step Attenuator .............. HP 355D, Option H89 1 dB Step Attenuator ............... HP 355C, Option H25[...]

10. Step Gain and 18.4 MHz Local Oscillator Adjustments 10. If A4A5R33 CAL adjustment does not have sufficient range to adjust trace to the top CRT graticule line, increase or decrease the value of A4A7R60 as necessary to achieve the proper adjustment range of A4A5 CAL adjustment. See Figure 3-39 for the location of A4A7R60. Refer to Table 3-3 for [...]

10. Step Gain and 18.4 MHz Local Oscillator Adjustments 1 dB Gain Step Checks 22. Key in [ REFERENCE LEVEL ) -19.9 dBm. Set step attenuators to 15 dB. Press MARKER @ twice to establish a new reference. 23. Key in ( REFERENCE LEVEL ) -17.9 dBm. Set step attenuators to 13 dB. 24. MKR A level, as indicated by CRT annotation, should be .OO f0.5 dB. If [...]

10. Step Gain and 18.4 MHz Local Oscillator Adjustments A4A5 STEP GAIN R2 Cl0 FREO R51 +lOV ADJ RlO ZERO COARSE C9 “R A4A5 Figure 3-49. Location of .l dB Gain Step, 18.4 MHz LO, and + 1OV Adjustments 36. Key in [ FREQUENCY SPAN] 1 kHz, [REs] 100 Hz, and [ PEAK SEARCH] a]. 37. Adjust front-panel FREQ ZERO control fully clockwise. Press CPEAK SEARC[...]

11. Down/Up Converter Adjustments Reference Related Performance Test Description Equipment Procedure IF-Display Section A4A6 Down/Up Converter Resolution Bandwidth Switching Uncertainty Test The CAL OUTPUT signal is connected to the RF INPUT connector of the instrument and controls are set to display the signal in a narrow bandwidth. A marker is pl[...]

11. Down/Up Converter Adjustments 6. Adjust A4A6AlR29 WIDE GAIN to align markers on CRT display. MKR A level should indicate 1.00 X. See Figure 3-51 for location of adjustment. 7. Disconnect CAL OUTPUT from RF INPUT. Optional Note Perform the following procedure if the A4A6Al assembly is replaced or the A4A6Al 21.4 MHz Bandpass Amplifier Filter is [...]

11. Down/Up Converter Adjustments Down Converter Gain Adjustment Note If a gain problem is suspected in the 10 Hz to 1 kHz resolution bandwidths, perform the following procedure to test and adjust the gain through A4A6A2. 1. Place A4A6 on extender boards. 2. On the spectrum analyzer being tested, press QNST PRESET ], and set the spectrum analyzer t[...]

12. Time Base Adjustment (SN 2840A and Below, also 3217A05568 and Above) 12. Time Base Adjustment (SN 2840A and Below, also 3217AO5568 and Above) Reference Related Performance Test Description Equipment RF Section: A27Al 10 MHz Quartz Crystal Oscillator Center Frequency Readout Accuracy Test The frequency of the internal 10 MHz Frequency Standard i[...]

12. Time Base Adjustment (SN 2840A and Below, also 3217A05568 and Above) Procedure Note The spectrum analyzer must be ON continuously (not in STANDBY) for at least 72 hours immediately prior to oscillator adjustment to allow both the temperature and frequency of the 10 MHz Quartz Crystal Oscillator to stabilize. Adjustment should not be attempted b[...]

12. Time Base Adjustment (SN 2840A and Below, also 3217A05568 and Above) 6. Set the Frequency Counter controls as follows: INPU T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A ATTENUATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .x10 DC Couple d . . . . . . . . . . . . . . . . . . .[...]

12. Time Base Adjustment (SN 2840A and Below, also 3217A05568 and Above) 14. 15. 16. Reading 11: mHz Subtract the shifted frequency reading in step 11 from the last recorded frequency in step 10. This gives the frequency correction factor needed to adjust the A27 10 MHz Frequency Standard. Frequency Correction Factor: mHz On the Frequency Counter, [...]

12. Time Base Adjustment (SN 2848A to 3217A05567) 12. Time Base Adjustment (SN 2848A to 3217A05567) Reference Related Performance Test Description Equipment Procedure Note RF Section: A27Al Frequency Standard Regulator A27A2 10 MHz Quartz Crystal Oscillator Center Frequency Readout Accuracy Test The frequency of the internal 10 MHz Frequency Standa[...]

12. Time Base Adjustment (SN 2848A to 3217A05567) The A27A2 10 MHz Quartz Crystal Oscillator (HP P/N 1081 l-601 11) typically reaches its specified aging rate again within 72 hours after being switched off for a period of up to 30 days, and within 24 hours after being switched off for a period less than 24 hours. If extreme environmental conditions[...]

12. Time Base Adjustment (SN 2848A to 3217A05567) INT/EXT switch (rear panel) . . . . . . . . . . . . . . . . . . . . . EXT 7. On the Frequency Counter, select a 10 second gate time by pressing, (GATETIME_) 10 (GATE]. 8. Offset the displayed frequency by -10.0 MHz by pressing, MATH ( SELECT / ENTER ] Cm) 10 I-1 6 [SELECT/E~&ER] ( SELECT / ENTER[...]

12. Time Base Adjustment (SN 2848A to 3217A05567) 15. On the Frequency Counter, select a 1 second gate time by pressing, t-1 1 @Y%YiK]. The Frequency Counter should now display the difference between the frequency of the INPUT A signal and 10.0 MHz with a resolution of 0.01 Hz (10 mHz). Note Do not use a metal adjustment tool to tune an oven-contro[...]

13. 20 MHz Reference Adjustments 13. 20 MHz Reference Adjustments Reference Related Performance Test Description Equipment RF Section: Al6 20 MHz Reference Calibrator Amplitude Accuracy Test The 20 MHz output is peaked and amplitude checked for proper level. The INTERNAL REFERENCE output level is then checked for proper output level as compared to [...]

13. 20 MHz Reference Adjustments Procedure 1. Position instrument on right side as shown in Figure 3-56 and remove bottom cover. Remove Al6 20 MHz Reference and install on extenders. See Figure 3-57 for the location of Al6 components. 2. Set LINE switch to ON and press (INSTR PRESET ). 3. Set rear-panel FREQ REFERENCE INT/EXT switch to INT. Disconn[...]

13. 20 MHz Reference Adjustments 8566AB Spectrum Analyzer ( CENTER FREQUENCY _) to 20.34 MHz and SCALE to 10 dB/division. 10. Adjust Al6 20.34 MHz NULL A16C12 for minimum 20.34 MHz signal at A16J3 as indicated by HP 8566A/B Spectrum Analyzer display. With signal nulled, the plates of the NULL adjustment capacitor should be meshed approximately half[...]

13. 20 MHz Reference Adjustments Press &K?@ Press CnTavj: AVmarkers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..on Vmarker 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 800mv Vmarker2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..2.7V start marker . . . . . . . . . . . . . . . [...]

14. 249 MHz Phase Lock Oscillator Adjustments 14. 249 MHz Phase Lock Oscillator Adjustments Reference Description Equipment RF Section: A7 249 MHz Phase Lock Oscillator Two center frequencies are chosen: one which will tune the 249 MHz Oscillator to its low-end frequency and one which will tune the 249 MHz Oscillator to the high-end frequency. The [...]

14. 249 MHz Phase Lock Oscillator Adjustments Procedure 1. Place instrument on right side with IF-Display Section facing right as shown in Figure 3-59. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. Key in [=J 2 and adjust A7C3 for + 13.0 fO.l V dc at A7Pl. 12. 13. 14. adjustment. Press 1 (RECALL 1) and adjust A7L2 for +5.2 rtO.05 V dc. Repeat steps 12 and 13 unt[...]

15. 16. 17. 18. 19. 20. 14. 249 MHz Phase Lock Oscillator Adjustments Set LINE switch to STANDBY. Adjust A7L2 one-half turn counterclockwise before placing A7 249 MHz PLO in HP 8568B Spectrum Analyzer without extender. (Leave DVM connected to A7TPl). Set LINE switch to ON and key in @KKK) 1. DVM indication should be between +5.2 V dc and +6.0 V de.[...]

[...]

15. 275 MHz Phase Lock Oscillator Adjustment A18 275 MHz PHASE LOCK OSCILLATOR - 1 0 - U I 1 C8 PLO,ADJUST A18 Figure 3-62. Location of 275 MHz PLO Adjustment 7. Disconnect test equipment from instrument. Adjustments 3-l 11[...]

16. Second IF Amplifier and Third Converter Adjustment Reference RF Section: A19 Second IF Amplifier A20 Third Converter Description A synthesized sweeper is used to inject a signal of 301.4 MHz at -20 dBm in to the A19 Second IF Amplifier. The output of the amplifier is displayed on a scalar network analyzer. The amplifier is adjusted for a bandpa[...]

Procedure Second IF Amplifier Adjustments 16. Second IF Amplifier and Third Converter Adjustment Adapters: Type N (f) to APC-3.5 (f) . . . . . . . . . . . . . . . . . . . . . . 1250-1745 Type N (m) to BNC (f) (2 required) . . . . . . . . . . . . . 1250-0780 Type N (f) to BNC (f) (2 required) . . . . . . . . . . . . . . 1250-1474 APC 3.5 (f) to APC [...]

16. Second IF Amplifier and Third Converter Adjustment 14. 15. 16. 17. See Figure 3-65 for the typical response when the bandpass filter is properly adjusted. On the scalar network analyzer, press @CEEQ MAX. Press cursor A, ON and set the cursor to the -3 dB point on the low side of the filter response (ho.1 dB). Press cursor A and set the cursor t[...]

16. Second IF Amplifier and Third Converter Adjustment Note Place the Markers as accurately as possible within the cursor markers for maximum frequency accuracy. Note Third Converter Adjustment 18. On the synthesized sweeper, press @G-X-n). M3 - M4 should read between 7 and 14 MHz. 19. On the synthesized sweeper, press [MKR] OFF and @iW] OFF. 20. S[...]

16. Second IF Amplifier and Third Converter Adjustment 17. Pilot Second IF Amplif’ier Adjustments Reference RF Section: A9 Pilot Second IF Amplifier A10 Pilot Third Converter Description A synthesized sweeper is used to inject a signal of 269 MHz at -20 dBm into the A9 Pilot Second IF Amplifier. The output of the amplifier is displayed on a scale[...]

17. Pilot Second IF Amplifier Adjustments Procedure 1. Position instrument on right side as shown in Figure 3-67, with bottom cover removed. 2. Set LINE switch to ON and press GNST PRESET ) on HP 8568B (DUT), HP 8757A, and HP 8340A/B. 3. Connect 20 dB Attenuator and power splitter to RF OUTPUT of synthesized sweeper. Connect one arm of power splitt[...]

17. Pilot Second IF Amplifier Adjustments A9 PILOT A10 PILOT 2ND IF AMPLIFIER 3RD CONVERTER I / 269MHz BANDPASS FILTER Figure 3-68. Location of 269 MHz Bandpass Filter Adjustments 3 dB Point > 21 MHz -4 Figure 3-69. 269 MHz Bandpass Filter Adjustments Waveforms 15. On the scalar network analyzer, press [CURSOR) MAX. Press cursor A, ON and set [...]

18. Frequency Control Adjustments 18. Frequency Control Adjustments Reference Related Performance Tests Description Equipment Procedure RF Section: A22 Frequency Control Sweep Time Accuracy Test Frequency Span Accuracy Test Center Frequency Readout Accuracy Test The sweep reference voltage is adjusted and then the sweep times are adjusted for prope[...]

18. Frequency Control Adjustments A22 FREOUENCY CONTROL START FM SPAN STOP TILT YTO -SD VT0 TlJNE REF REF FAST A22 Figure 3-71. Location of Frequency Control Adjustments 5. Connect DVM to A22TP13 and ground to A22TP12. 6. Adjust A22 TUNE REF A22R17 for DVM indication of -10.285 AO.001 V dc. See Figure 3-71 for location of adjustment. 7. Key in [ CE[...]

18. Frequency Control Adjustments Full Sweep 11. Repeat Start-Up Time Measurement procedure in step 8 and step 9 Adjustment for ( SWEEP TIME ) of 20 ms. Note value of measurement. 20 ms start-up time: 12. Key in [Shift_) CREssWr three times and note the CRT annotation. The annotation should indicate SWEEP GEN measured sweeptime of (20 ms + start-up[...]

18. Frequency Control Adjustments START and STOP Adjustments FM SPAN Adjustment 30. 22. 23. Key in (ml [CF STEP SIZE) J 1023 Hz. Adjust A22 LSD VT0 A22R7 for DVM indication of +0.0218 f0.0001 V dc. If not using an HP 3455A DVM, adjust for specified voltage plus the DVM indication in step 20. See Figure 3-71 for location of adjustment. 24. On the HP[...]

19. Second Converter Adjustments 19. Second Converter Adjustments Reference RF Section: A23 RF Converter Related Performance RF Gain Uncertainty Test Test Spurious Responses Test Description First, the second LO frequency is adjusted for proper frequency and then the LO shift is adjusted by using the front-panel keys to shift the LO up and down. Ne[...]

19. Second Converter Adjustments Procedure Second LO Frequency 3. Set HP 8568B Spectrum Analyzer LINE to ON and press and Shift Adjustments (JNSTR PRESET]. Note The second LO and pilot second LO output power is typically -35 dBm or less. An HP 8447F amplifier is used in steps 1 through 26 to amplify the LO power to a useable level for the counter a[...]

19. Second Converter Adjustments 9. Readjust A23A3 2ND MIXER A23A3Z4 for maximum power indication. 10. Disconnect the amplifier’s input from A23A3J3 and connect to A23A3J4. 11. Adjust A23A3 PILOT 2ND MIXER A23A3Z8 for maximum power meter indication. See Figure 3-73 for location of adjustment. 12. Disconnect power meter and connect frequency count[...]

19. Second Converter Adjustments Second Converter 27. Key in m (JJ) T, [ FREQUENCY SPAN ] 0 Hz. Bandpass Filter Adjustments 28. On the synthesized sweeper, key in ICF) 240 MHz, a 50 MHz, and CPowerLeVel] - 10 dBm. 29. Connect the synthesized sweeper’s SWEEP OUTPUT (rear panel), Z-AXIS BLANK/MKRS (rear panel), and PULSE MODULATION INPUT (front pan[...]

19. Second Converter Adjustments Figure 3-74. Typical PILOT 2ND IF Bandpass (SHIFT t) Figure 3-75. Typical PILOT 2ND IF Bandpass (SHIFT 1) 42. Key in [*] 0) u and note amplitude of signal. Key in ISHIFT) @a T and note amplitude of the bandpass signal peak. 43. Continue to key in [SHIFT] 0) u then a T while adjusting A23A3Z8 for maximum amplitude an[...]

19. Second Converter Adjustments 48. Disconnect cable connected to A23A3J2 and connect to A23A3Jl (1ST IF IN). Reconnect semi-rigid cable to A23A3J2 that was disconnected in step 36. 49. Set the synthesized sweeper’s a for 2052.5 MHz ho.1 MHz. Adjust a to center the bandpass signal. 50. Adjust A23A3 Zl, 22, 23, and L2 for best bandpass shape and [...]

19. Second Converter Adjustments Second Converter 53. Repeat steps 14 through 19 to ensure that Second LO frequency Final Adjustments and shift are still properly adjusted. 54. Check the bandpass at the 3 dB points for both the 2ND LO T and 1. On the scalar network analyzer, press [%i?%@ Max. Press cursor A a and set the cursor at the -3 dB point 5[...]

20. 50 MHz Voltage-Tuned Oscillator Adjustments Reference Related Performance Test Description Equipment Procedure RF Section: All 50 MHz Voltage-Tuned Oscillator (VTO) Frequency Span Accuracy Test Center Frequency Readout Accuracy Test First, the voltage reference for the Shaping network is set by measuring the voltage required to tune the 50 MHz [...]

20. 50 MHz Voltage-Tuned Oscillator Adjustments DACS Accuracy Check 3. Connect DVM to A22TP9 and ground lead to A22TP12. 4. Key in [SHIFT) [CF STEP SIZE] J 0 Hz. If using an HP3456A DVM, pressISTORE_)aZ, way, a, (STORE)@JY, then @El 0 (X-Z)/Y. If not using an HP 3456A DVM, note voltage indication for reference later. 5. Key in [m] [CF STEP SIZE ) J[...]

20. 50 MHz Voltage-Tuned Oscillator Adjustments 14. Adjust All POS SUPPLY AllR6 for a DVM indication the same as that noted in step 12. See Figure 3-79 for location of adjustment. VT0 High-Frequency 15. Key in LSHIFT) (CF STEP SIZE ] J 112 kHz and Cm) I-1 N. End Adjustment 16. Adjust All OFFSET AllRlO for VTP frequency indication 28.000 MHz f0.005 [...]

2 1. Slope Compensation Adjustments 21. Slope Compensation Adjustments Reference RF Section: A22 Frequency Control Related Performance Test Frequency Response Test Description The HP 8568B Spectrum Analyzer is swept between 10 MHz and 1500 MHz, using a synthesized sweeper which has been power-meter leveled. The resulting response curve is displayed[...]

2 1. Slope Compensation Adjustments Procedure 1. Place instrument on right side as show in Figure 3-80, and remove bottom cover. 2. Connect equipment as shown in Figure 3-80 with power splitter connected to the output of the synthesized sweeper with a cable. Connect one arm of the splitter directly to the SIGNAL INPUT of the HP 8568B Spectrum Analy[...]

21. Slope Compensation Adjustments Note At this sweep time, some trace discontinuities are common. 14. Adjust A22R66 TILT for best flatness (clockwise rotation increases the power slope), and trigger two sweeps on the synthesized sweeper. See Figure 3-81 for the location of A22R66. Compare the resultant trace with the specification. Continue adjust[...]

22. Comb Generator Adjustments Reference RF Section: A23 RF Converter Al6 20 MHz Reference Description The output of the Pilot First Converter is connected to the signal input of the Second Converter. This allows the comb teeth from the A23A6 Comb Generator to be displayed on the CRT display. The phase lock flags are disabled, using a shift key fun[...]

22. Comb Generator Adjustments Equipment Cable, SMA (m) to SMA (m) . . . . . . . . . . . . . . . HP 85680-20094 Procedure 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. Set instrument LINE switch to ON and press ~NSTR PRESET ). Connect CAL OUTPUT to SIGNAL INPUT 2. Key in CCENTER FREQUENCY ) 20 MHz, [ FREQUENCY SPAN ] 100 kHz, (ATTEN) 0 dB, LOG [ ENTER[...]

22. Comb Generator Adjustments a typical comb tooth display. See Figure 3-83 for location of adjustments. 14. The majority of the comb teeth should be above the -30 dBm Display Line. No comb teeth should exceed -22 dBm, and no comb teeth should be less than -36 dBm. 15. If unable to adjust comb teeth as described in previous steps, proceed with the[...]

23. Analog-To-Digital Converter Adjustments 23. Analog-To-Digital Converter Adjustments Reference Description Equipment A3A8 Analog-to-Digital Converter The Analog-to-Digital Ramp Converter is adjusted at zero and full-scale by injecting a 0 V dc input and + 10 V dc input and adjusting the OFFS and GAIN controls until the ramp output at A3A8TPll to[...]

23. Analog-To-Digital Converter Adjustments Procedure 1. Position instrument upright as shown in Figure 3-85 and remove top cover. 2. Set LINE switch to ON and press ~NSTR PRESET ). Standard Procedure 3. Procedure using Low-Noise DC Supply is illustrated in Figure 3-93. a. Key in [BLANK) TRACE A and SWEEP [S’NGLE]. b. Disconnect cable 0 (black) f[...]

23. Analog-To-Digital Converter Adjustments 1. Adjust A3A8R5 GAIN for a square wave displayed on the oscilloscope. The square wave should be approximately 4 V,,. See Figure 3-86 for location of adjustment. Alternate Procedure 4. Procedure without using Low-Noise DC Supply: a. Press QNSTR PRESET]. b. Key in TRACE A [BLANK] and SWEEP (SINGLE). c. Dis[...]

24. Track and Hold Adjustments Reference A3A9 Track and Hold Description The CAL OUTPUT signal is connected to the RF INPUT. The instrument is placed in zero frequency span to produce a dc level output from the IF-Video section and this dc level is regulated by adjusting the reference level. The Offsets and Gains on the Track and Hold assembly are [...]

24. Track and Hold Adjustments A6 AS ~EOM4LR ES A6A9AlRll CAL ADJ I I 10. 11. TRIF c29 RI1 ‘LER MATCH CAL OUTPUT RlO A6A9Al Figure 3-88. Location of Track and Hold Adjustments Key in m TRACE A [-HOLD]. b Adjust A3A9R44 OFFS POS until MARKER A level indication as indicated by CRT annotation flickers back and forth between .OO and .lO dB. 12. Key i[...]

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

25. Digital Storage Display Adjustments 25. Digital Storage Display Adjustments Reference Description Equipment Procedure Preliminary Graticule Adjustments A3A 1 Trigger A3A2 Intensity Control A3A3 Line Generator First, preliminary CRT graticule adjustments are performed to position the graticule on the CRT. These preliminary adjustments assume tha[...]

25. Digital Storage Display Adjustments A-IA? A3A3 A3Al INTENSITY LINE TRIGGER CONTROL GENERATOR !12 R51 R50 -HRESH Y 8 & H BAL X S & H BAI A3A2 A3A3 R34 SWP OFFSET A3Al Figure 3-90. Location of Digital Storage Display Adjustments 5. Adjust A3A2R12 LL THRESH fully clockwise. See Figure 3-90 for location of adjustment. 6. Adjust A3A3R6 XLL s[...]

25. Digital Storage Display Adjustments Sample and Hold 13. Set LINE switch to STANDBY. Balance Adjustments 14. Place A3A3 Line Generator on extender boards. 15. Set LINE switch to ON. Press QNSTR PRESET ]. 16. Key in C-1 0 ’ (RECORDER LOWER LEFT) 0 [Hz). Press [SHIFT] 0 1 (RECORDER UPPER RIGHT) 1028 a. 17. Connect oscilloscope to A3A3TP4. 18. Co[...]

25. Digital Storage Display Adjustments 20. 21. 22. 23. 24 . Set LINE switch to ON. X and Y Offset and 25. Gain Adjustments 26, 27. Press (INSTR PRESET). Key in [ FREQUENCY SPAN ] 0 Hz, [ SWEEP TIME ) 100 ps. Disconnect cable 9 (white) from A3A9J2 and connect to A3A2J2 LG/FS test connector on A3A2 Intensity Control; the other end of the cable remai[...]

25. Digital Storage Display Adjustments 41. Adjust A3A3R5 Y GAIN to align the top graticule line with the fast sweep signal trace. Final Graticule 42. Press QNSTR PRESET ], TRACE A @iZQ. Adjustments 43. Set A3A2R12 LL THRESH fully clockwise. 44. Adjust A3A3R6 XLL and A3A3R9 YLL to align horizontal and vertical lines so that each line meets the edge[...]

Low-Noise DC The Low-Noise DC Supply shown in Figure 3-93 can be constructed SUPPlY using the parts listed in ‘Ikble 3-7. Figure 3-93. Low-Noise DC Supply ‘Ihble 3-7. Parts for Low-Noise DC Supply Reference/Designation Cl Jl RI R2 R3 R4 R5 R6 R7 R8 Sl Ul VRl VR2 HP Fart Number Description 0160-2055 1250-0083 0698-0083 0757-0442 0757-0442 0757-0[...]

Crystal Filter Bypass Network Configuration Crystal Filter Bypass Network Configuration The Crystal Filter Bypass Network Configuration shown in Figure 3-94 can be constructed using the parts listed in Iable 3-8 and Table 3-9. Table 3-8 list the parts required for the construction of 21.4 MHz IF crystal-filter bypass networks used with the A4A4 and[...]

Option 462 Introduction This chapter contains modified performance tests and adjustment procedures for Option 462 instruments. When working on Option 462 instruments, substitute the procedures in this chapter for the standard versions contained in chapters two and three. For earlier Option 462 instruments (HP 85662A serial prefixes below 3341A) in [...]

4. 6 dB Resolution Bandwidth Accuracy Test Related Adjustment Specification Description Equipment Procedure 6 dB Bandwidth Adjustments &20%, 3 MHz bandwidth &lo%, 30 Hz to 1 MHz bandwidths + 50%, -0%, 10 Hz bandwidth 30 kHz and 100 kHz bandwidth accuracy figures only applicable 590% Relative Humidity, 540” C. The 6 dB bandwidth for each r[...]

[...]

4. Impulse and Resolution Bandwidth Accuracy Test Related Adjustment Impulse Bandwidth Adjustments Specification *20%, 3 MHz bandwidth flO%, 1 MHz to 1 kHz bandwidths -0, +50%, 300 H z to 10 Hz (6 dB bandwidths) Description A frequency synthesizer and pulse/function generator are used to input pulses to the spectrum analyzer. The amplitude of the p[...]

[...]

4. Impulse and Resolution Bandwidth Accuracy Test 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. 31. 32. Tl to 30 kHz. On th e Set the frequency synthesizer (FREQUENC‘ spectrum analyzer key in [ FREQUENCY SPP 0.5 seconds, SWEEP (SINGLEI), MA MARKER amplitude in Table 4 3011 [ Z, SWEEP TIME] RKER ( PEAK SEARCH ). Record -2. Calculate the [...]

[...]

4. Impulse and Resolution Bandwidth Accuracy Test Note 6 dB resolution bandwidth measurements are used in Performance Test 5, Impulse and Resolution Bandwidth Selectivity Test. HKR A 3.103 MHZ b REF -9.0 dBm ATTEN 10 129 0.00 dB LINEAR Figure 4-3. 6 dB Resolution Bandwidth Measurement 46. Select the spectrum analyzer [BW] and FREQUENCY SPAN ) setti[...]

4. Impulse and Resolution Bandwidth Accuracy Test ‘Ihble 4-3. 6 dB Resolution Bandwidth Accuracy Res BW 3 MHz (i) 1 MHz (i) 300 kHz (i) 100 kHz (i) 30 kHz (i) 10 kHz (i) 3 kHz (i) 1 kHz (i) 300 Hz (i) 100 Hz (i) 30 Hz (i) 10 Hz (i) 1 T Frequency Span MARKER A Readout of 6 dB Bandwidth Minimum 5 MHz 2 MHz 500 kHz 200 kHz 50 kHz 20 kHz 5 kHz 2 kHz [...]

5. 6 dB Resolution Bandwidth Selectivity Test Related Adjustments Specification Description Equipment Note Procedure 3 MHz Bandwidth Filter Adjustments 21.4 MHz Bandwidth Filter Adjustments Step Gain and 18.4 MHz Local Oscillator Adjustments 60 dB/6 dB bandwidth ratio: ~11: 1, 3 MHz to 100 kHz bandwidths ~8: 1, 30 kHz to 30 Hz bandwidths 60 dB poin[...]

7. 8. 9. 10. rp 10 5. 6 dB Resolution Bandwidth Selectivity Test Vary spectrum analyzer settings according to Table 4-4. Press SWEEP @KZF] and measure the 60 dB bandwidth for each resolution bandwidth setting by the procedure of steps 4 through 6. Record the value in Table 4-4. Record the 6 dB bandwidths from Table 4-l in ‘Ikble 4-4. Calculate th[...]

5. 6 dB Resolution Bandwidth Selectivity Test ‘Ikble 4-4. 6 dB Resolution Bandwidth Selectivity r 3 MHz 1 MHz 300 kHz 100 kHz 30 kHz 10 kHz 3 kHz 1 kHz 300 Hz 100 Hz 30 Hz 10 Hz Spectrum Analyzer 20 MHz 15 MHz 5 MHz 2 MHz 500 kHz 200 kHz 50 kHz 10 kHz 5 kHz 2 kHz 500 Hz 100 HZ VlDEoj 100 Hz 300 Hz AUTO AUTO AUTO AUTO AUTO AUTO AUTO AUTO AUTO AUTO[...]

[...]

5. Impulse and Resolution Bandwidth Selectivity Test HKR P i e REF 0.0 aBm Al-TEN 10 d0 -0. 10 aw 4.04 HHZ 30 a0 / / I. Figure 4-5. 60 dB Bandwidth Measurement 4. Press MARKER In] and position the positive movable marker 60 dB down from the signal peak on the negative-going edge of the signal trace (the MARKER @J amplitude readout should be 0.00 [...]

5. Impulse and Resolution Bandwidth Selectivity Test ‘Ihble 4-5. Impulse and Resolution Bandwidth Selectivity Spectrum Analyzer Measured Measured Bandwidth Maximum Res 60 dB 6 dB Selectivity Selectivity BW Frequency ‘EG” Bandwidth Bandwidth (60 dB BW Span Ratio t 6 dB BW) 3 MHz (i) 20 MHz 100 Hz 11:l 1 MHz (i) 15 MHz 300 Hz 11:l 300 kHz (i) 5[...]

6. Impulse and Resolution Bandwidth Switching Uncertainty Tkst Related Adjustment Specification Description Equipment Procedure 3 MHz Bandwidth Filter Adjustments 21.4 Bandwidth Filter Adjustments Down/Up Converter Adjustments f2.0 dB, 10 Hz bandwidth f0.8 dB, 30 Hz bandwidth f0.5 dB, 100 Hz to 1 MHz bandwidth * 1 .O dB, 3 MHz bandwidth 30 kHz and [...]

6. Impulse and Resolution Bandwidth Switching Uncertainty Test MKR A 0 HZ rp REF 53.0 d0m ATTEN 10 d8 0.00 dB I I I I I I I I I I I ldB’ t-H+ I I I I I I I MAR <ER rl 0 iz / Figure 4-6. Bandwidth Switching Uncertainty Measurement T&ble 4-6. Bandwidth Switching Uncertainty Res BW 1 MHz (i) 3 MHz (i) 300 kHz (i) 100 kHz (i) 30 kHz (i) 10[...]

Test 4. 6 dB Resolution Bandwidth Accuracy Test (p/o ‘lhble 2-19, Performance Test Record) ‘RES) 3MHz 1MHz 300kHz 100kHz 30kHz 10kHz 3kHz 1kHz 300Hz 100Hz 30Hz 10Hz Step 8. 6 dB Resolution Bandwidth Accuracy FREQUENCY SPAN) Readout of 3 dB Bandwidth 5MHz 2.400 MHz 2 MHz 900kHz 500kHz 270.0 kHz 200kHz 90.0 kHz 50kHz 27.00 kHz 20kHz 9.00 kHz 5kHz[...]

@ai-- 3 MH z (i) 1 MH z (i) 300 kH z (i) 100 kH z (i) 30 kH z (i) 10 kH z (i) 3 kH z (i) 1 kH z (i) 3 MHz 3 MHz 3 MHz 1 MHz 300 kHz 100 kHz 30 kHz 10 kHz Test 4. Impulse and Resolution Bandwidth Accuracy Test (p/o ‘Ihble 2-19, Performance Test Record) Test 4. Impulse and Resolution Bandwidth Accuracy Test (p/o able 2-19, Performance Test Record) [...]

Test 4. Impulse and Resolution Bandwidth Accuracy Test (p/o ‘Ihble 2-19, Performance Test Record) Steps 39 through 46. 6 dB Resolution Bandwidth Accuracy Res BW 3 MHz (i) 1 MHz (i) 300 kHz (i) 100 kHz (i) 30 kHz (i) 10 kHz (i) 3 kHz (i) 1 kHz (i) 300 Hz (i) 100 Hz (i) 30 Hz (i) 10 Hz (i) 5 MHz 2 MHz 500 kHz 200 kHz 50 kHz 20 kHz 5 kHz 2 kHz 500 H[...]

Test 5. 6 dB Resolution Bandwidth Selectivity (p/o lkble 2-19, Performance Test Record) Test 5. 6 dB Resolution Bandwidth Selectivity (p/o ‘lhble 2-19, Performance lkst Record) Step 9. 6 dB Resolution Bandwidth Selectivity Spectrum Analyzer @?iFEF) ( FREQUENCY SPAN ] [VIDEO] 3 MHz 1 MHz 300 kHz 100 kHz 30 kHz 10 kHz 3 kHz 1 kHz 300 Hz 100 Hz 30 H[...]

Test 5. Impulse and Resolution Bandwidth Selectivity (p/o I)dble 2-19, Performance T&t Record) Steps 5 through 9. Impulse and Resolution Bandwidth Selectivity Spectrum Analyzer Measured Measured Bandwidth Maximum Res 60 dB 6dB Selectivity Selectivity BW Fr~f~~cy ‘f;” Bandwidth Bandwidth (60 dB BW Ratio -6dBBW) 3 MHz (i) 20 MHz 100 Hz 11:l 1[...]

Test 6. Impulse and Resolution Bandwidth Switching Uncertainty (p/o ‘Ikble 2-19, Performace Test Record) - ‘l&t 6. Impulse and Resolution Bandwidth Switching Uncertainty (p/o Table 2-19, Performace lkst Record) Step 5. Impulse and Resolution Bandwidth Res BW 1 MHz (i) 3 MHz (i) 300 kHz (i) 100 kHz (i) 30 kHz (i) 10 kHz (i) 3 kHz (i) 1 kHz ([...]

9. 6 dB Resolution Bandwidth Adjustments Reference Related Performance Test Description Equipment Procedure IF-Display Section A4A9 IF Control 6 dB Resolution Bandwidth Accuracy Test The CAL OUTPUT signal is connected to the RF INPUT. Each of the adjustable resolution bandwidths is selected and adjusted for the proper bandwidth. No test equipment i[...]

9. 6 dB Resolution Bandwidth Adjustments 13. Using the DATA knob, adjust the marker down one side of the display signal to the 6 dB point; CRT MKR A annotation indicates .500 x. A4A9 N f’ ,I I 1 N N IF CONTROL 5 s x : 2 VI-m-m ~000000000000000000 n 000000000000000000 r A4A9 Figure 4-7. Location of Bandwidth Adjustments 14. Adjust A4A9R61 1 MHz [...]

9. 6 dB Resolution Bandwidth Adjustments 24. 25. 26. 27. 28. 29. 30. 31. 32. 33. 34. Press MARKER IOFF), then MARKER In]. Using the DATA knob, adjust the marker down one side of the displayed signal to the 6 dB point; CRT MKR annotation indicates .500 x. Adjust A4A9R65 10 kHz for MKR A indication of 5.00 kHz while maintaining the marker at .500 X u[...]

9. Impulse Bandwidth Adjustments 9. Impulse Bandwidth Adjustments Reference Related Performance Test Description Equipment Procedure IF-Display Section A4A9 IF Control Impulse Bandwidth Accuracy Test The CAL OUTPUT signal is connected to the SIGNAL INPUT 1. Each of the adjustable resolution bandwidths is selected and adjusted for the proper impulse[...]

9. Impulse Bandwidth Adjustments 13. Using the DATA knob, adjust the marker down one side of the display signal to the 7.3 dB point; CRT MKR A annotation indicates 0.430 X. A4A9 IF CONTROL 1 1 Figure 4-8. Location of Bandwidth Adjustments 14. Adjust A4A9R61 1 MHz for MKR A indication of 500 kHz while maintaining the marker at 0.430 X using the DA[...]

9. Impulse Bandwidth Adjustments [ REFERENCE LEVEL ] and using the DATA knob to place the signal peak near the top of the graticule. 24. Press MARKER IOFF), then MARKER (al. 25. Using the DATA knob, adjust the marker down one side of the displayed signal to the 7.3 dB point; CRT MKR annotation indicates 0.430 X. 26. Adjust A4A9R65 10 kHz for MKR A [...]

5 Option 857 Introduction This chapter contains a modified performance test for Option 857 instruments. When working on Option 857 instruments, substitute the procedure in this chapter for the standard version contained in Chapter 2. The procedure included in this chapter is listed below: Performance Tests Test 12, Amplitude Fidelity Test.. . . . .[...]

12. Option 857 Amplitude Fidelity Test Related Adjustment Log Amplifier Adjustments Specification Log: Incremental fO.l dB/dB over 0 to 80 dB display Cumulative 3 MHz to 30 Hz Resolution Bandwidth: 54~0.6 dB max over 0 to 70 dB display (20 - 30°C). sf1.5 dB max over 0 to 90 dB display 10 Hz Resolution Bandwidth: sf0.8 dB max over 0 to 70 dB displa[...]

12. Option 857 Amplitude Fidelity Test Equipment Frequency Synthesizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 3335A Adapter, Type N (m) to BNC (f) . . . . . . . . . . . . . . . . . . . . . . HP 1250-0780 (2) BNC to BNC cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 10503A Procedure Log Fidelit[...]

12. Option 857 Amplitud e Fidelity Test ‘Ikble 5-1. Log Amplitude Fidelity (10 Hz RBW; Option 857) Frequency 1 2 Fidelity Error Cumulativ e Cumulative Synthesizer Calibrated MARKER A Amplitude (Column 2 - Column 1) Error Error Amplitude Amplitude WI GW 0 to 80 dB 0 to 90 dB Pm) Step WI WY + 10 0 (ref) 0 (ref) 0 (ref) 0 -10 -10 -20 -20 -30 -30 -40[...]

12. Option 857 Amplitude Fidelity Test Frequency 1 Synthesizer Calibrated Amplitude Amplitude (dBm) Step +lO 0 (ref) 0 -10 -10 -20 -20 -30 -30 -40 -40 -50 -50 -60 -60 -70 -70 -80 -80 -90 20. Subtract the greatest negative fidelity error from the greatest positive fidelity error for calibrated amplitude steps from -10 dB to -70 dB. The results shoul[...]

12. Option 857 Amplitude Fidelity Test ‘lhble 5-3. Linear Amplitude Fidelity Frequency MARKER A Allowable Range Synthesizer Amplitude (413% of Reference Level) Amplitude (-1 WV 1 (dBm) ( . Min Max 5-6 Option 857[...]

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

Test 12. Option 857 Amplitude Fidelity Test Step 9. Log Amplitude Fidelity (10 Bz RBW; Option 857) Frequency 1 Synthesizer Calibrated Amplitude Amplitude WW Step +lO 1 (ref) 0 -10 -10 -20 -20 -30 -30 -40 -40 -50 -50 -60 -60 -70 -70 -80 -80 -90 Step 18. Log Amplitude Fidelity (10 kBz RBW; Option 857) Frequency 1 Synthesizer Calibrated Amplitude Ampl[...]

Test 12. Option 857 Amplitude Fidelity Test Step 26. Linear Amplitude Fidelity Frequency MARKER A Allowable Range Synthesizer Amplitude (1t3% of Reference Level) Amplitude (dB) W) WW Min Max 0 - 10.87 -9.21 -10 -23.10 -17.72 Option 857 5-9[...]

6 Major Assembly and Component Locations IF-Display Section Figure Index Assembly See Figure AlAl ............................................... 6-6 AlA ........................................... 6-4, 6-5 AlA ........................................... 6-4, 6-5 AlA ............................................... 6-4 AlA ..........................[...]

W24 ................................................ 6-7 W25 ................................................ 6-7 W26 ................................................ 6-7 W27 ................................................ 6-7 W28 ................................................ 6-7 W29 ................................................ 6-7 W32 ....[...]

A26F2 .............................................. 6-3 A26F3 .............................................. 6-3 A26F4 .............................................. 6-3 A26F5 .............................................. 6-3 A26Ql .............................................. 6-3 A26Q2 .............................................. 6-3 A26Q3 ..[...]

w43 / c c5 c4 c3 c2 Figure 6-l. RF Section, Top View A26 6-4 Major Assembly and Component locations[...]

423A2 w14 w3 w43 w31 427 ASA A543 W2 45A2 A5A 1 A5AlJl W42 A5Rl ( INPUT SELECT) (KEYBOARD) Figure 6-2. RF Section, Front View Major Assembly and Component locations 6-5[...]

A26 Fl F2 F3 F4 F5 -15v -5v +2ov +5v 1 5A 3A 1 .5A 6A +;I$ 01 020403 05 Ul I WI4 A5i4 A?4 A533 Ai Al 1 d9 A5’J 1 AiSl Figure 6-3. RF Section, Bottom View 6-6 Major Assembly and Component locations[...]

AlAlOC2 AlAlOC3 AlA W7 w21 AlA AIAI 1 W6 w21 AlA AlVl AlA Figure 6-4. IF Section, Top View (SN 3001A and Below) AlAlOCl AlAlOC4 AlA AlA A . I ‘i r8 AlA FLi AITI A4A9 A4A8 A4A7 A4A6 A4A5 A4A4 A4A3 A4A2 A4Al A3A9 A3A8 A3A7 A3A6 A3A5 A3A4 A:A3 A3A2 A3Al Major Assembly and Component locations 6-7[...]

AlAlOCl AlAlOC4 AlAlOC2 AlAlOC3 w21 AlA AlVl AlA AlA AlA Al AlAS Fl 1 AITI A4A3 A4A8 A4A7 A4A6 A4A5 A4A4 A4A3 A4A2 A4Al i ‘A3Al 0 > 0 0 Figure 6-5. IF Section, Top View (SN 3004A and Above) 6-8 Major Assembly and Component locations[...]

AlVl Figure 6-6. IF Section, Front View ,w3 w9 Major Assembly and Component locations 6-9[...]

AlAlO I /’ AA A4AlO W8 A3AlO / I W24 w23 Figure 6-7. IF Section, Bottom View /w2g /W24 / W28 ‘W23 ‘W32 (SN 3004A and above) AlVl 6-10 Major Assembly and Component locations[...]