Download  Print this page

Advertisement

HP 8568B Spectrum Analyzer
HEWLETT
PACKARD
HP Part No. 08568-90118
Printed in USA
September 1993

Advertisement

Table of Contents

   Also See for HP 8568B

   Related Manuals for HP 8568B

   Summary of Contents for HP 8568B

  • Page 1 Performance Tests and Adjustments Manual HP 8568B Spectrum Analyzer HEWLETT PACKARD HP Part No. 08568-90118 Printed in USA September 1993...
  • Page 2 @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...
  • Page 3 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 facility, and to the calibration facilities of other International Standards Organization members.
  • Page 4 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.
  • Page 5: General Safety Considerations

    Safety Symbols 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 Caution which, if not correctly performed or adhered to, could result in damage to or destruction of the instrument.
  • Page 6 HP 8568B Included with the HP Model 8568B Spectrum Analyzer are three Spectrum Analyzer manuals: the Installation and Verification Manual, the Operating and Programming Manual, and the Performance Tests and Adjustments Documentation Manual. Outline HP 8568B Installation General information, installation, specifications, characteristics, and and Verification operation verification.
  • Page 7: Table Of Contents

    Contents 1. General Information Introduction ..... l - l Instruments Covered by this Manual ..l - l Operation Verification .
  • Page 8 Test 11. Log Scale Switching Uncertainty Test ..2-82 Test 12. Amplitude Fidelity Test ... 2-83 Test 13. Average Noise Level Test ..2-84 Test 14.
  • Page 9 Crystal Filter Bypass Network Configuration ..3-151 4. Option 462 Introduction ..... 4. 6 dB Resolution Bandwidth Accuracy Test ..4.
  • Page 10 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.
  • Page 11 3 - 3 4 3-8. Location of AlA Components ... 3 - 3 5 3-9. CRT Cut-Off Voltage 3 - 3 6 3-10. Waveform at AlA3TP5’ : : : : : : : : : : : : : : : 3 - 3 8 3-11.
  • Page 12 3-56. 20 MHz Reference Adjustments Setup ..3-103 3-57. Location of 20 MHz Reference Adjustments ..3-104 3-58. Typical Signal at A16TP3 ....3-106 3-59.
  • Page 13 6-10 6-7. IF Section, Bottom View ....Contents-7...
  • Page 14 lhbles 2-l. Performance Test Cross-Reference ..2-2. Center Frequency Readout Error Test Record ..2-3. Wide Span Error ....2-4.
  • Page 15: General Information Introduction

    General Information Introduction 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.
  • Page 16: Operation Verification

    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 test equipment.
  • Page 17 ‘Ihble l-l. Recommended Test Equipment (1 of 5) Critical Specifications for Instrument Zecommended 4dj. Perf. Equipment Substitution Model Test SIGNAL SOURCES Frequency: 10 MHz to 1500 MHz Synthesized HP 8340A Sweeper Output Power: + 10 dBm maximum (leveled) Aging Rate: ~1 x 10mg/day Spurious Signals: 135 dBc (~7 GHz) 125 dBc (<20 GHz) Amplitude Modulation: dc to 100 kHz...
  • Page 18 ‘Ihble l-l. Recommended Test Equipment (2 of 5) Instrument Critical Specifications for Recommended Perf. Adj. Equipment Substitution Model Test ANALYZERS Frequency: 100 Hz to 2.5 GHz HP 8566A/B Spectrum Analyzer to 22 GHz Preselected Spectrum RF Spectrum Analyzer 8590B Analyzer Frequency: 9 kHz to 1.8 GHz AC Probe High Frequency Probe...
  • Page 20 ‘Ihble l-l. Recommended Test Equipment (4 of 5) Instrument Critical Specifications for Recommended Perf. 1dj. Equipment Substitution Model Test ATTENUATORS (Cont’d) ?requency: 200 Hz to 18 GHz HP 8491B, Attenuator rype N Connectors Option 020 TERMINATIONS Termination HP 11593A Impedance: 500; BNC FIWERS Low-Pass ?latness: ho.25 dB...
  • Page 21 ‘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 APC 3.5 Male Connectors Length: 91 cm (36 inches) SWR: cl.4 at 22 GHz Cable BNC, 122 cm (48 in.) (3 required)
  • Page 22: L-l. Service Accessories, Hp Part Number 08568-60001

    HP Part Number Description 8 5 6 8 0 - 6 0 0 2 8 Extender Board: 20 contacts; 2 rows of 10 8 5 6 8 0 - 6 0 0 9 3 Cable: 4-foot long; BNC to SMB snap-on 8 5 6 6 2 - 6 0 0 8 8 PC Board: Display Adjustment Test 0 8 5 0 5 - 6 0 0 4 1...
  • Page 23: Introduction

    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 provided in this section should be performed only if semi-automatic test equipment (for Operation Verification) is not available or the Performance Test is not in the Operation Verification...
  • Page 24: Equipment Required

    If manual performance tests are done, results of the performance tests may be tabulated in the HP 8568B Performance Test Record at the end of this section. The HP 8568B Performance Test Record lists all of the tested specifications and the acceptable ranges for the measurement values obtained during the tests.
  • Page 25 1. Center Frequency Readout Accuracy Test 1. Center Frequency Readout Accuracy ‘I&t Related Adjustments Frequency Control Adjustments Time Base Adjustment Step Gain and 18.4 MHz Local Oscillator Adjustments 50 MHz Voltage-Tuned Oscillator Adjustments Specification (uncorrected) f2% of frequency span + frequency reference error x tune frequency +30% of resolution bandwidth setting + 10 Hz) in AUTO resolution bandwidth after adjusting FREQ ZERO at stabilized temperature.
  • Page 26: Center Frequency Readout Error Measurement

    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 HP1250-1250 61 cm (24 in.) Cable Assembly, SMA Male Connectors HP 5061-1086 Procedure 1.
  • Page 27 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 frequency standard and repeat test.
  • Page 28: Frequency Span Accuracy Test Setup

    5% of sweep and then at 95% of sweep. These frequencies correspond each to half a division from edge of the CRT. The spans chosen are based on the architecture of the HP 8568B RF hardware: Assembly Being Swept Span...
  • Page 29 2. Frequency Span Accuracy Test Equipment Synthesized Sweeper ..............83640A AdapterTypeN(m) SMA(f)..........1250-1250 Cable;SMAconnectors..............5061-5458 Cable; BNC122cm(48in)............HP 10503A Procedure 1. Connect equipment as shown in Figure 2-3. 2. Press PRESET] on analyzer. QNsTR Press 100 MHz, [CENTER SPAN_) 200 FREQ FREQUENCY 4.
  • Page 30 2. Frequency Span Accuracy Test ‘Ihble 2-4. Span Error Freq Span SDan Error Spec. ADUT-ASyn from ‘Ihble 2-3 - 1 0 Hz 10 Hz -5000 Hz 5000 Hz -5,005 Hz 5,005 Hz -50,000 Hz 50,000 Hz -23,230 Hz 23,230 Hz -460,000 Hz 460,000 Hz -462,300 Hz...
  • Page 31: Sweep Time Accuracy Test (220 Ms)

    Alternate Procedure Perform this procedure if the equipment for preferred procedure is unavailable. Sweep time accuracy for sweep times 220 ms can also be measured using the HP 8568B’s internal frequency counter for a time interval measurement. SPECTRUM ANALYZER UNIVERSAL COUNTER...
  • Page 32 3. Sweep Time Accuracy Test (220 ms) Equipment Universal Counter ......... . HP 5316A Digital Voltmeter .
  • Page 33: Penlift Output Signal

    3. Sweep Time Accuracy Test (220 ms) NOTE:PULSE WIDTH APPROXIMATE +15v t-SWEEP RETRACE -r-l 1 L --- t-ACTIVE SNEEP + ov- - 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.
  • Page 34 3. Sweep Time Accuracy Test (220 ms) ‘Ihble 2-6. Sweep Time Accuracy, Sweep Times 220 s Marker A Time S W E E P T I M E Measured 4.4 s 20 s 3.6 s 200 s 32 s 48 s Sweep Times 220 ms 14.
  • Page 35: Resolution Bandwidth Accuracy Test

    4. Resolution Bandwidth Accuracy Test 4. Resolution (For instruments with Option 462, refer to Chapter 4.) Bandwidth Accuracy Test Related Adjustment 3-dB Bandwidth Adjustments Specification &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% Relative Humidity, <...
  • Page 36: Resolution Bandwidth Measurement

    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 table.
  • Page 38: Resolution Bandwidth Selectivity Test

    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 4 through 6 and record the value in ‘fable 2-9.
  • Page 39 5. Resolution Bandwidth Selectivity Test ‘lhble 2-9. Resolution Bandwidth Selectivity Measured Measured Bandwidth Maximum Spectrum Analyzer 3 dB Selectivity Selectivity Ratio 6OdB Bandwidth Bandwidth (60 dB BW + RES] ( ) @iiFSE] F R E Q U E N Y S P A N 3dBBW) 3 MHz 20 MHz 100 Hz...
  • Page 40: Resolution Bandwidth Switching Uncertainty Test

    6. Resolution (For instruments with Option 462, refer to Chapter 4.) Bandwidth Switching Uncertainty Test Related Adjustments 3 MHz Bandwidth Filter Adjustments 21.4 MHz Bandwidth Filter Adjustments Down/Up Converter Adjustments Specification (uncorrected; referenced to 1 MHz bandwidth; 20 - 30°C after 1 hour warm-up) k2.0 dB, 10 Hz bandwidth f0.8 dB, 30 Hz bandwidth *0.5 dB, 100 Hz to 1 MHz bandwidth fl.O dB, 3 MHz bandwidth 30 kHz and 100 kHz bandwidth switching...
  • Page 41: Bandwidth Switching Uncertainty Measurement

    6. Resolution Bandwidth Switching Uncertainty Test Figure 2-8. Bandwidth Switching Uncertainty Measurement ‘Ihble 2-10. Bandwidth Switching Uncertainty Deviation Allowable (MKR A Deviation Readout, dB) (dB) 0 (ref) 1 MHz 5 MHz 0 (ref) IlIl.00 3 MHz 5 MHz Zto.50 300 kHz 5 MHz Ito.
  • Page 43: Input Attenuator Switching Uncertainty Test

    7. Input Attenuator Switching Uncertainty Test 6. Press MARKER CPEAK SEARCH),(KJ and frequency synthesizer [~~J’JREFERENCE LEVEL amplitude according to Table 2-l 1. At each setting, press MARKER and record the deviation from the 10 dB setting from PEAK SEARCH the MARKER A amplitude readout (see Figure 2-10). The deviation should not exceed *l.O dB at any setting.
  • Page 44: Frequency Response Test

    8. Frequency Response Test Related Adjustment Slope Compensation Adjustment Specification 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 Description Frequency response at both analyzer inputs is tested by slowly sweeping a flat signal source over the frequency range and observing the peak-to-peak variation in trace amplitude.
  • Page 45 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 .
  • Page 46: Frequency Response Measurement (20 Mhz To 1.5 Ghz)

    8. Frequency Response Test Adjust POWER LEVEL on synthesized sweeper (using data knob) to place peak of 20 MHz signal near reference level (top) graticule line. Press 1 dB on spectrum analyzer. Adjust POWER dB/mv], ENTER LEVEL on synthesized sweeper to position peak of signal 2 divisions below the reference level line.
  • Page 47: Frequency Response Test Setup (100 Khz To 20 Mhz)

    8. Frequency Response Test Option 001: Set TO -6.0 dBm. REFERENCE LEVEL 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...
  • Page 49 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 trace. Record the measurements below. SIGNAL INPUT 1 (100 kHz to 20 MHz) Maximum Minimum 26.
  • Page 50 8. Frequency Response Test 100Hzto 100 kHz Press on the spectrum analyzer. Activate SIGNAL (INSTR PRESET INPUT 1. Key in the following spectrum analyzer settings: 1 kHz ... START FREQ) .._........100 kHz ;&TEq .
  • Page 51 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 Minimum...
  • Page 52 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 -Overall Minimum...
  • Page 54: Rf Gain Uncertainty Test

    9. RF Gain Uncertainty Test 1 I I\ I - Figure 2-16. RF Gain Uncertainty Measurement 2-32 Performance Tests...
  • Page 55: If Gain Uncertainty Test

    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 from the -10 dB setting will contribute to IF gain uncertainty as shown: Uncertainty (uncorrected;...
  • Page 56: Note

    10. IF Gain Uncertainty Test Equipment Frequency Synthesizer ........HP 3335A Adapter, Type N (m) to BNC (f) .
  • Page 57: If Gain Uncertainty Measurement

    10. IF Gain Uncertainty Test ‘Ihble 2-12. IF Gain Uncertainty, 10 dB Steps Frequency Deviation R E F E R E N C E L E V E L Synthesizer (Marker A Amplitude Amplitude 0 (ref.) - 1 2 - 2 0 - 2 2 - 3 0 - 3 2...
  • Page 58: If Gain Uncertainty Measurement (2 Db)

    10. IF Gain Uncertainty Test 2 dB Gain Steps 13. Press QNSTR pREsETj,(jRECALL) 14. Set to -1.9 dBm. LEVEL] REFERENCE 15. Press MARKER (OFF). Set CVlDEo] to 100 Hz. 16. Set the frequency synthesizer for an output power level of -3.9 dBm.
  • Page 59 10. IF Gain Uncertainty Test 0.1 dB Gain Steps 19. Set to 0 dB. LEVEL) REFERENCE 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 SEARCH),@.
  • Page 60 10. IF Gain Uncertainty Test ‘Ihble 2-14. IF Gain Uncertainty, 0.1 dB Steps Frequency Deviation R E F E R E N C E L E V E L (MKR A Synthesizer Amplitude Amplitude (am) -2.00 0 (ref) -0.1 -2.10 - 0 .
  • Page 62: 11. Log Scale Switching Uncertainty Test

    11. Log Scale Switching Uncertainty Test 100.001 100.001 -9.8 -9.8 ATTEN ATTEN 10 de -a.a2 -a.a2 2 dB/ 2 dB/ CENTER CENTER 100.000 100.000 SPAN SPAN kliz 1 0 0 1 0 0 20.0 20.0 nl*ec nl*ec Figure 2-20. Log Scale Switching Uncertainty Measurement Figure 2-20.
  • Page 63: Amplitude Fidelity Test

    12. Amplitude Fidelity Test 12. Amplitude (For instruments with Option 857, refer to Chapter 5.) Fidelity Test 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).
  • Page 64 12. Amplitude Fidelity Test Equipment Frequency Synthesizer ........HP 3335A Adapter, Type N (m) to BNC (f) .
  • Page 65: Amplitude Fidelity Measurement

    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 9.7 d&n ATTEN 20 dB 10 d0/ SPAN 0 CENTER...
  • Page 66 12. Amplitude Fidelity Test ‘Ihble 2-17. Linear Amplitude Fidelity Frequency MARKER A Allowable Range Synthesizer Amplitude (f3 % of Reference Level) Amplitude (dB) -10.87 -9.21 -17.72 - 1 0 -23.10 2-44 Performance Tests...
  • Page 67: 13. Average Noise Level Test

    13. Average Noise Level Test 13. Average Noise Level Tkst Specification 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 but >500 Hz with 10 Hz resolution bandwidth, 0 dB input attenuation, 1 Hz video filter (SIGNAL INPUT 1 only).
  • Page 68: Average Noise Level Measurement

    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. 10. Change to 1.001 MHz. Follow the procedure CENTER FREQUENCY to steps 7 through 9 to determine the average noise level. The value should be c-135 dBm.
  • Page 69: Residual Responses Test

    14. Residual Responses Test 14. Residual Responses Test Specification 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 dB input attenuation.
  • Page 70: Residual Responses Measurement

    14. Residual Responses Test 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.
  • Page 71: Spurious Responses Test

    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 to 1500 MHz;...
  • Page 72: Harmonic Distortion Test Setup

    15. Spurious Responses Test SPECTRUM ANALYZER SYNTHESIZED SMEEPEA 10 DB ATTENUATOR 300 MHZ LPF 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 ...
  • Page 73 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 @, 560 MHz, MARKER to position CCENTER CPEAK FREQUENCY SEARCH a second marker on the peak of the second harmonic distortion...
  • Page 74: Intermodulation Distortion Test Setup

    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 .
  • Page 75: Intermodulation Distortion Products

    15. Spurious Responses Test 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 previous settings before making distortion measurements.
  • Page 76 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 @, 30.01 MHz, MARKER (CENTER QUENCY...
  • Page 77 15. Spurious Responses Test 35. On the spectrum analyzer, key in 59 MHz, CENTER FREQUENCY MARKER to position a second marker at the peak PEAK SEARCH of the 59 MHz second-order intermodulation distortion product. The response should be below the display line (>75 dB below the total input power).
  • Page 78: Residual Fm Test

    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 analyzer. The analyzer is tuned in zero span to a point the 30 Hz bandwidth response for which the slope of the response is known from direct measurement.
  • Page 79: Bandwidth Filter Slope Measurement

    16. Residual FM Test hr RF -I... L 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.
  • Page 80: Slope Detected Residual Fm

    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 Press DISPLAY LINE (m’ and PEAK SEARCH position the display line at the lowest point on the trace. Figure 2-30.
  • Page 81 16. Residual FM Test 13. Press MARKER Ia] and position movable marker at the lowest point on trace (see Figure 2-30). Read the MARKER A amplitude from the display and record its absolute value. MARKER A amplitude = p-p amplitude = 14.
  • Page 82: Line-related Sidebands Tests

    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.
  • Page 83: Line Related Sidebands Measurement

    17. Line-Related Sidebands Tests Figure 2-31. Line Related Sidebands Measurement O p t i o n 4 0 0 1. Connect CAL OUTPUT to SIGNAL INPUT 2. Press ~NSTR PRESET Press (ml 8 and adjust AMPTD CAL for a MARKER amplitude of -10.
  • Page 84: Calibrator Amplitude Accuracy Test

    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 .
  • Page 85: Fast Sweep Time Accuracy Test (~20 Ms)

    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.
  • Page 86: Fast Sweep Time Measurement (~20 Ms)

    19. Fast Sweep Time Accuracy Test (~20 ms) 5. Press MARKER SEARCHJ@~EFZF),~. PEAK 6. Set to 0 Hz, (j-1 to 3 MHz, [VlDEoBW) to 3 FREQUENCY SPAN MHz, and press TRIGGER Cm]. 7. Set synthesized sweeper for an amplitude-modulated output. 8.
  • Page 87 19. Fast Sweep Time Accuracy Test (~20 ms) ‘able 2-18. Fast Sweep Time Accuracy (~20 ms) Function Generator Frequency Sweep Time Error SWEEP TIME (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...
  • Page 88: St Lo Output Amplitude Test

    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.
  • Page 89: Frequency Reference Error Test

    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 within 30 minutes.
  • Page 91 ‘lhble 2-19. Performance Tkst Record Tested by Hewlett-Packard Company Report No. Model HP 8568B Date Serial No. IF-Display Section RF Section Performance Tests 2-69...
  • Page 92 Tkst 1. Center Frequency Readout Accuracy Test Step 8. Center Frequency Readout Error Test Record Spectrum Analyzer Comb Generator Center Readout Comb [FREQUENCY SPAN) [ E R FREQUENCY) C E N T Frequency Measured 100 MHz 100 MC 100 MHz 1002 100 MHz 1000...
  • Page 93: Test 2. Frequency Span Accuracy Test

    Test 2. Frequency Span Accuracy Test ‘I&t 2. Frequency Span Accuracy Test Steps 7, 9, and 11. Wide Span Error Spectrum Analyzer Synthesized Sweeper DUT Measured kequency Center Freq. A Freq. B A Synth Freq. C Freq. D A DUT Span Frequency Cf-.45 span cf + .45 span...
  • Page 94: Test 3. Sweep Time Accuracy

    Test 3. Sweep Time Accuracy Step 6. Sweep Time Accuracy, Sweep Times 220 ms Marker A Time S W E E P T I M E Measured 20 ms 18 ms 22 ms 50 ms 45 ms 55 ms 100 ms 90 ms 110 ms 500 ms...
  • Page 95: Test 4. Resolution Bandwidth Accuracy

    Test 4. Resolution Bandwidth Accuracy ‘I&t 4. Resolution Bandwidth Accuracy Step 8. Bandwidth Accuracy MARKER A Readout of 3 ( d 3 Bandwidth [REW- F R E Q U E N C Y S P A N Measured 3MHz 5MHz 2.400 MHz 3.600 MHz 1MHz...
  • Page 96: Test 5. Resolution Bandwidth Selectivity

    Test 5. Resolution Bandwidth Selectivity Steps 7, 8 and 9. Resolution Bandwidth Selectivity Spectrum Analyl er Measured Measured Bandwidth Maximum Selectivity Selectivity Ratio (VIDEOBW] RES] [FREQUHKYWANJ Bandwidth Bandwidth (60 dB BW t dB BW) MHz 20 MHz 100 Hz 15:l 1MHz 15MHz 15:l...
  • Page 97: Test 6. Resolution Bandwidth Switching Uncertainty Test

    Test 6. Resolution Bandwidth Switching Uncertainty Test lkst 6. Resolution Bandwidth Switching Uncertainty Test Step 6. Bandwidth Switching Uncertainty Deviation Allowable ‘FREQUENCY SPAN] (MKR Deviation Readout, dB) 1 MHz 0 (ref) 0 (ref) AZ1.00 Iko.50 100 kHz zto.50 Ito. 10 kHz dzo.50 kO.50 f0.50...
  • Page 98: Test 7. Input Attenuator Switching Uncertainty Test

    Test 7. Input Attenuator Switching Uncertainty Test Step 7. Input Attenuator Switching Uncertainty Frequency Deviation Corrected Allowable R E F E R E N C E L E V E L Synthesizer (MARKER A Deviation Deviation Amplitude Amplitude - 5 0 - 5 2 0 (ref) 0 (ref)
  • Page 99: Test 8. Frequency Response Test

    Test 8. Frequency Response Test Test 8. Frequency Respons g& Measured 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)
  • Page 100: Test 9. Rf Gain Uncertainty Test

    Test 9. RF Gain Uncertainty Test Step 6. 2nd LO Shift Measured -1.0 dB + 1.0 dB 2-78 Performance Tests...
  • Page 101: Test 10. If Gain Uncertainty Test

    Test 10. IF Gain Uncertainty Test Test 10. IF Gain Uncertainty Test Step 12. Step IF Gain Uncertainty, 10 dB Steps Frequency Deviation [REFERENCELEVEL] Synthesizer (Marker A Amplitude Amplitude (dBm) 0 (ref.) - 1 0 - 1 2 - 2 0 - 2 2 - 3 0 - 3 2...
  • Page 102 Test 10. IF Gain Uncertainty Test Step 22. IF Gain Uncertainty, 0.1 dB Steps Frequency Deviation LEVEL- R E F E R E N C E Synthesizer (MKR A Amplitude Amplitude 0 (ref) -2.00 -0.1 -2.10 - 0 . 2 -2.20 - 0 .
  • Page 103 Test 10. IF Gain Uncertainty Test Step 23. Recorded deviations from Step 12. Reference Level Range: 0 to -70 dBm -80 to -120 dBm Largest Positive Deviation: Largest Negative Deviation: Step 24. Recorded deviations from Steps 18 and 22. Step 18 Step 22 Largest Positive Deviation: Largest Negative Deviation:...
  • Page 104 YLkst 11. Log Scale Switching Uncertainty Tkst Step 6. Log Scale Switching Uncertainty Deviation Allowable SCALE MKR Amplitude (dB/DIV) Deviation 0 (ref) 0 (ref) xto.5 hO.5 f0.5 2-82 Performance Tests...
  • Page 105: Test 12. Amplitude Fidelity Test

    Test 12. Amplitude Fidelity Test Test 12. Amplitude Fidelity ‘I&t Step 6. Log Amplitude Fidelity Frequency Fidelity Error Synthesizer Calibrated MARKER A Amplitude (Column 2 - Column 1: Amplitude Amplitude Step 0 (ref) 0 (ref) 0 (ref) - 1 0 - 1 0 - 2 0 - 2 0...
  • Page 106: Test 13. Average Noise Level Test

    Test 13. Average Noise Level Test 2-84 Performance Tests...
  • Page 107: Test 14. Residual Responses Test

    Test 14. Residual Responses Test Test 14. Residual Responses Test Step 11. Maximum Residual Response Frequency Measured Measured Range Max Amplitude Frequency 500 Hz to 1500 MHz -105 dBm Option 400: 500 Hz to 2.5 kHz -95 dBm 2.5 kHz to 1500 MHz -105 dBm Performance Tests 2-85...
  • Page 108 Tkst 15. Spurious Responses Tkst Description Measured Second Harmonic -90 dBm Third Harmonic -105 dBm Third Order Intermodulation Distortion -100 dBm 30 MHz input signals, 1 MHz separation Third Order Intermodulation Distortion -100 dBm 30 MHz input signals, 1 MHz separation Third Order Intermodulation Distortion -90 dBm 30 MHz input signals, 10 kHz separation...
  • Page 109: Test 16. Residual Fm Test

    Test 16. Residual FM Test Test 16. Residual FM Test Step 14. Residual FM IMinIMeasuredIrax] Performance Tests 2-87...
  • Page 110: Test 17. Line-related Sidebands Test

    Tkst 17. Line-Related Sidebands Test Step Min 1 M e a s u r e d M a x 1 120 Hz (100 Hz) -85 dB 180 Hz (150 Hz) -85 dB 240 Hz (200 Hz) -85 dB 7. Option 400 400 Hz -75 dB 800 Hz...
  • Page 111: Test 18. Calibrator Amplitude Accuracy Test

    Test 18. Calibrator Amplitude Accuracy Test Test 18. Calibrator Amplitude Accuracy ‘I&t Step 2. CAL OUTPUT Amplitude M e a s u r e d M a x -10.3 dBm -9.70 dBm Performance Tests 2.89...
  • Page 112: Test 19. Fast Sweep Time Accuracy Test (~20 Ms)

    Test 19. Fast Sweep Time Accuracy Test (~20 Step 11. F&t Sweep Time Accuracy (~20 ms) Function Generator Frequency TIME) SWEEP 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...
  • Page 113: Test 20. 1st Lo Output Amplitude Test

    Test 20. 1st LO Output Amplitude Test Test 20. 1st LO Output Amplitude Test Step 4. 1st LO Output Level Performance Tests 2-91...
  • Page 114: Test 21. Frequency Reference Error Test

    Test 21. Frequency Reference Error Test 1 Min 1 Measured 1 Max DescriDtion ISteD Frequency (initial) Frequency (after 24 hours) Difference between 4 and 5 0.01 Hz 2-92 Performance Tests...
  • Page 115: Adjustments Introduction

    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.
  • Page 116: Safety Considerations

    Safety Although this instrument has been designed in accordance with Considerations 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. Warning Adjustments in this section are performed with power supplied to the instrument while protective covers are removed.
  • Page 117: Factory-selected Components

    ‘able 3-l. Adjustment Cross Reference Function Adjusted Adjustment Procedure Low Voltage 1. Low Voltage Power Supply Adjustments High Voltage 2. High Voltage Adjustment CRT Display (Standard) 3. Preliminary Display Adjustment 4. Final Display Adjustments CRT Display (Digital Storage) 25. Digital Storage Display Adjustments IF Gains 5.
  • Page 118: Related Adjustments

    Related Any adjustments which interact with, or are related to, other Adjustments 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 Illustrations showing the locations of assemblies containing Points and adjustments, and the location of those adjustments within the...
  • Page 119 ‘Ihble 3-2. Adjustable Components Reference Adjustment Adjustment Adjustment Function Name Number Designator AlA2C308 c307 Adjusts rise and fall times of Z axis amplifier pulse. AlA2R308 ZHF GAIN Adjusts rise and fall times of Z axis amplifier pulse. AlA2R319 INT GAIN Sets adjustment range of front-panel INTENSITY control.
  • Page 120 ‘Ihble 3-2. Adjustable Components (continued) Reference Adjustment Adjustment Adjustment Function Name Number Designator SWEEP OFFSET Adjusts digital sweep to begin at left edge of A3AlR34 graticule. A3A2R12 LL THRESH Adjusts point at which graticule lines switch from short to long lines. XS&H Adjusts horizontal sample and hold pulse.
  • Page 121 ‘able 3-2. Adjustable Components (continued) Reference Adjustment Adjustment Adjustment Function Designator Name Number A4A4C9 Centers A4A4 bandwidth filter crystal pole #l symmetry. A4A4C19 LC CTR Centers A4A4 bandwidth filter LC pole #l. A4A4C20 Centers A4A4 bandwidth filter crystal pole #l. A4A4C39 Adjusts A4A4 bandwidth filter crystal pole #2 symmetry.
  • Page 122 Table 3-2. Adjustable Components (continued) Reference Adjustment Adjustment Adjustment Function Designator Name Number A4A7C42 Centers 3 MHz bandwidth filter pole #5. A4A7R30 10 Hz AMPTD Adjusts 3 MHz bandwidth filter 10 Hz bandwidth amplitude. A4A7R4 1 10 Hz AMPTD Adjusts 3 MHz bandwidth filter 10 Hz bandwidth amplitude.
  • Page 123 ‘Ih.ble 3-2. Adjustable Components (continued) Adjustment Function Reference Adjustment Adjustment Designator Name Number AGAlORl Adjusts 3.3 GHz oscillator drive current. A6AlOR9 Adjusts mixer bias 18.6 to 22 GHz. A6AlOR12 Adjusts mixer bias 12.5 to 18.6 GHz. A6AlOR15 Adjusts mixer bias 5.8 to 12.5 GHz. A6AlOR18 Adjusts mixer bias 2 to 5.8 GHz.
  • Page 124 ‘Ihble 3-2. Adjustable Components (continued) Reference Adjustment Adjustment Adjustment Function Designator Name Number A6A12R82 Adjusts tracking at 18.6 GHz (18.6 to 22). A6A12R83 Adjusts tracking at 12.5 GHz (12.5 to 18.6). A6A12R84 Adjusts tracking at 5.8 GHz (5.8 to 12.5). A6A12R85 Adjusts tracking at 4 GHz (2 to 5.8).
  • Page 125 ‘lhble 3-2. Adjustable Components (continued) Reference Adjustment Adjustment Adjustment Function Designator Name Number AllA5Cl IMPEDANCE Optimizes sampler output. MATCH Al lA5C2 IMPEDANCE Optimizes sampler output. MATCH Al lA5Rl IF GAIN Adjusts level of 30 MHz output. OFFSET Adjusts scan ramp offset. A16R62 SWEEPTIME Adjusts time of sweep ramp.
  • Page 126 ‘Ihble 3-2. Adjustable Components (continued) Reference Adjustment Adjustment Adjustment Function Number Designator Name AlA2R31 Sets orthogonality of CRT. ORTHO PATTERN Adjusts for optimum rectangular shape of CRT AlA2R32 display. INTENSITY Sets adjustment range of front-panel INTENSITY AlA2R35 control. LIMIT Adjusts astigmatism of CRT. AlA2R36 ASTIG A lA2R30...
  • Page 127 ‘Ihble 3-3. Factory-Selected Components Reference Adjustment Range of Values Function of Component Designator Procedure (0 or PF) AlA2R9 2.87 K to 6.19 K Sets intensity level. A3AlR72 19.6 K to 42.2 K Sets intensity level. 121 K to 162 K Sets intensity level.
  • Page 128 l’hble 3-3. Factory-Selected Components (continued) Adjustmenl Reference Range of Values Function of Component Designator Procedure (0 or PF) A4A3R74 1.78 K to 13.3 K Log fidelity A4A3R79 8.25 K to 82.5 K Bandpass filter temperature compensation A4A3R80 1.0 K to 6.81 K Bandpass filter temperature compensation 1 K-OPEN A4A3R8 1...
  • Page 129 ‘Ihble 3-3. Factory-Selected Components (continued) Reference Adjustment Range of Values Function of Component Designator Procedure (0 or PF) A4A7R13 10.0 K to 17.8 K Adjusts crystal filter bandwidth. A4A7R23 10.0 K to 17.8 K Adjusts crystal filter bandwidth. A4A7R24 Adjusts crystal filter bandwidth. 10.0 K to 17.8 K A4A7R34 Adjusts crystal filter bandwidth.
  • Page 130 Ifable 3-3. Fhctory-Selected Components (continued) Adjustment Range of Values Function of Component Reference Designator Procedure (0 or PF) A4A8R19 100 Kl to 1M Sets adjustment range of LC amplitude. Adjusts bandwidth shape in 10 kHz bandwidth. A4A8R24 0 to 100 3.83 K to 9.09 K Adjusts crystal filter bandwidth.
  • Page 131 ‘Ihble 3-3. Factory-Selected Components (continued) Reference Adjustment Range of Values Function of Component Designator Procedure (0 or PF) A6A9AlR5 Sets sampler drive level 23.7 to 180 AGASAlRlC 909 to 1.21 K Sets adjustment range of A6A9AlRll CAL OUTPUT A6A9AlR27 Sets HET UNLOCK delay time constant for HP 56.2 K 85660B (10 K = HP 85660A) A6AlOR86...
  • Page 132 ‘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 130 to 220 pF Sets YTO loop response ~20 MHz. Sets YTO loop response.
  • Page 133 ‘able 3-3. Factory-Selected Components (continued) Reference Adjustment Range of Values Function of Component Designator Procedure (0 or PF) 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...
  • Page 134 ‘lkble 3-4. Standard Value Replacement Capacitors Type: Tubular Type: Dipped Mica Range: 1 to 24 pF Range: 27 to 680 pF filerance: 1 to 9.1 pF = f0.25 pF Tolerance: *5% Value (pF) BP Fart Number CD Value (pF) ZP Fart Number 0160-2236 0160-2306 0160-2237...
  • Page 135 ‘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 Value (fl) EP Fart Number 0698-3447 10.0 0757-0346 0698-0082 11.0 0757-0378 12.1 0757-0379 0757-0416 0698-3427 0757-0417 13.3...
  • Page 136 ‘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 ‘an fl.O% BP Part Number Value (!I) ElP Fart Number Value (0) 1OOK 0757-0465 17.8K 0698-3136 1lOK 0757-0466 19.6K 0698-3157 21.5K 121K 0757-0467...
  • Page 137 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 ‘ant 31.0% Value (fl) BP Part Number Value (0) EIP Fart Number 0757-0984 0698-3404 10.0 0575-0985 0698-3405 11.0 0757-0986 0698-0090 12.1 0757-0814 13.3 0757-0001...
  • Page 138 Ihble 3-6. Standard Value Replacement 0.5 Resistors (continued) Resistors Type: Fixed-Film Range: 10 to 1.47M Ohms Wattage: 0.5 at 125°C e *an fl.O% Value (0) EIP Fart Number Value (a) EIP Fart Number 16.2K 0757-0844 162K 0757-0130 17.8K 0698-0025 178K 0757-0129 19.6K 0698-3415...
  • Page 139: Low-voltage Power Supply Adjustments

    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...
  • Page 140: If-display Section Low-voltage Adjustments (sn 3001a And Below)

    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...
  • Page 141: Location Of Rf Section Low-voltage Adjustments

    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.
  • Page 142 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.
  • Page 143: High-voltage Adjustment (sn 3001a And Below)

    2. High-Voltage Adjustment (SN 3001A and Below) 2. High-Voltage Adjustment (SN 3001A and Below) Note 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. Note This procedure should be performed whenever the AlAll High Voltage Multiplier, AlVl CRT, or AlA High Voltage Regulator...
  • Page 144: High Voltage Adjustment Setup

    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) .
  • Page 145: Location Of High Voltage Adjustments

    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.
  • Page 146: Location Of Label And Test Point

    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.
  • Page 147 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.
  • Page 148 2. High-Voltage Adjustment (SN 3001A and Below) 27. On 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 set the LINE switch to ON (the INSTR CHECK I LED will light.)
  • Page 149 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 0 .
  • Page 150 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 drop below (V,, - 5O)V,., or 12 VP-,,, whichever is greater.
  • Page 151 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 AlA High-Voltage Regulator or CRT assemblies.
  • Page 152 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 rear of the CRT from AlA via cable harness W21. b.
  • Page 153: High-voltage Adjustment (sn 3004a And Above)

    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 AlA High Voltage Regulator Assembly is repaired or replaced.
  • Page 154: High Voltage Adjustment Setup

    2. High-Voltage Adjustment (SN 3004A and Above) Equipment Digital Voltmeter (DVM) ........HP 3456A DC High-Voltage Probe (1000: 1 divider) .
  • Page 155: Location Of High Voltage Adjustments

    2. High-Voltage Adjustment (SN 3004A and Above) AlABOSl - AlA7TP3 AlA H I G H V O L T A G E R E G U L A T O R - AlA6R103 Figure 3-13. Location of High Voltage Adjustments 4.
  • Page 156 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 step 15.
  • Page 157 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.
  • Page 158: Discharging The Crt Post-accelerator Cable

    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 blade of the screwdriver. Connect the other end of the jumper wire to the metal chassis of the IF Display Section.
  • Page 159: Preliminary Display Adjustments (sn 3001a And Below)

    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 Adjustment 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 Z-Axis Amplifier, AlA X-Deflection Amplifier, or AlA Y...
  • Page 160: Preliminary Display Adjustments Setup

    3. Preliminary Display Adjustments (SN 3001A and Below) Procedure X and Y Deflection 1. Connect a 10:1 (10 MQ) divider probe to oscilloscope’s channel Amplifier Pulse 1 input and a 10: 1 divider probe to the channel 4 input. Response Adjustments 2.
  • Page 161 3. Preliminary Display Adjustments (SN 3001A and Below) A1A5, AlA4- AlA2’ - A3A2 Figure 3-17. Location of AlA2, AlA4, AlA5, and A3A2 G(lN “1: GA I id H F G A I N ~000uu000000u00ur AlA4/AlA5 Figure 3-18. AlA2, AlA4, and AlA Adjustment Locations 10.
  • Page 163: Composite X Deflection Waveform

    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.
  • Page 164 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.
  • Page 165 3. Preliminary Display Adjustments (SN 3001A and Below) 28. Set the oscilloscope controls as follows: Press @iK]: Channel 1 ..........on amplitude scale .
  • Page 166: Adjustments

    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 Assembly.
  • Page 167: Preliminary Display Adjustments Setup

    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.
  • Page 168 3. Preliminary Display Adjustments (SN 3004A and Above) A3A2 A3Al Figure 3-24. Location of AlA and A3A2 TP5Ol R127 P120 Cl09 TP105 R227 R220 GEID c204 R217 c307 Figure 3-25. AlA Adjustment Locations 10. Set the Pulse/Function Generator controls as follows: MODE .
  • Page 169 3. Preliminary Display Adjustments (SN 3004A and Above) 12. Set the oscilloscope controls as follows: Press [CHAN]: Channel 1 ........... . on amplitude scale V/div ........
  • Page 170: Composite X Deflection Waveform

    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 r u n n i n g 2 0 .
  • Page 171 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 output of the pulse/function generator to 52 (Y input) on the Display Adjustment PC board in the A3A2 slot.
  • Page 172 3. Preliminary Display Adjustments (SN 3004A and Above) 29. Set the oscilloscope controls as follows: Press (CHAN]: Channel 1 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 Figure 3-29.
  • Page 173: Final Display Adjustments (sn 3001a And Below)

    4. Final Display Adjustments (SN 3001A and Below) 4. Final Display Adjustments (SN 3001A and Below) Reference AlAl Keyboard AlA Z Axis Amplifier AlA X Deflection Amplifier AlA Y Deflection Amplifier Description This procedure is used to optimize the appearance of the CRT display during routine maintenance or after CRT replacement or minor repairs.
  • Page 174: Location Of Final Display Adjustments On Ala2, Ala4

    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.
  • Page 175: Final Display Adjustments (sn 3004a And Above)

    4. Final Display Adjustments (SN 3004A and Above) 4. Final Display Adjustments (SN 3004A and Above) Reference AlAl Keyboard AlA X, Y, Z Axis Amplifiers Description This procedure is used to optimize the appearance of the CRT display during routine maintenance or after CRT replacement or minor repairs.
  • Page 176: Location Of Final Display Adjustments On Ala

    4. Final Display Adjustments (SN 3004A and Above) R512 R513 R319 R437 RI20 R220 R426 Figure 3-32. Location of Final Display Adjustments on AlA ‘Ihble 3-6. Initial Adjustment Positions Adjustment Position AlA R120 Y GAIN centered AlA R127 Y POSN centered AlA R220 X GAIN centered...
  • Page 177 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 then adjust the reference level to bring QNSTR PRESET the displayed noise to the top division of the graticule.
  • Page 178 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.
  • Page 179: Log Amplifier Adjustments

    5. Log Amplifier Adjustments 5. Log Amplifier Adjustments Reference IF-Display Section A4A3 Log Amplifier-Filter A4A2 Log Amplifier-Detector Related Performance Scale Fidelity Test Tests Note 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, a new matched set must be ordered.
  • Page 180 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 80 MHz and -86.98 dBm. The frequency CFREQUENCY) AMPLITUDE synthesizer will now provide a 5OfI load. Offset Adjustment Check 5.
  • Page 181 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.
  • Page 182 5. Log Amplifier Adjustments 23. Decrease the frequency synthesizer’s output level 10 dB. Press 0 dBm, and adjust the frequency synthesizer’s CREFERENCE LEVEL 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.
  • Page 183: Video Processor Adjustments

    6. Video Processor Adjustments 6. Video Processor Adjustments Reference IF-Display Section A4A 1 Video Processor Related Performance Log Scale Switching Uncertainty Test Test Description 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 log amplifier.
  • Page 184 6. Video Processor Adjustments 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 and adjust DATA knob for DVM indication as LWI) close to + 1.000 fO.OO1 V dc as possible.
  • Page 185 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.
  • Page 186 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 front panel) to peak the IF signal for maximum amplitude for the center of the 3 MHz bandpass.
  • Page 187: Location Of Center, Symmetry, And 10 Mhz Amplitude

    7. 3 MHz Bandwidth Filter Adjustments Procedure 1. Position instrument upright as shown in Figure 3-37 and remove top cover. Set LINE switch to ON and press ~NSTR PRESET Frequency Zero Check 3. Connect CAL OUTPUT signal to RF INPUT Key in IRECALL) @.
  • Page 188 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.
  • Page 189 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 M H z B a n d w i d t h F i l t e r Figure 3-39.
  • Page 190 7. 3 MHz Bandwidth Filter Adjustments 10 Hz Amplitude Adjustments 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).
  • Page 191: Mhz Bandwidth Filter Adjustments

    8. 21.4 MHz Bandwidth Filter Adjustments 8. 21.4 MHz Bandwidth Filter Adjustments Reference IF-Display Section A4A4 Bandwidth Filter A4A8 Attenuator-Bandwidth Filter Related Performance IF Gain Uncertainty Test Tests Resolution Bandwidth Switching Uncertainty test Resolution Bandwidth Selectivity Test Description First the LC Filters (100 kHz to 3 MHz bandwidths) on the A4A4 Bandwidth Filter are adjusted.
  • Page 192: Location Of A4a4 21.4 Mhz Lc Filter Adjustments

    8. 21.4 MHz Bandwidth Filter Adjustments Equipment Digital Voltmeter (DVM) ......HP 3456A 10 dB Step Attenuator ....HP 355D, Option H89 1 dB Step Attenuator .
  • Page 193: Location Of A4a4 21.4 Mhz Crystal Filter Adjustments

    8. 21.4 MHz Bandwidth Filter Adjustments 10. Key in CRESBW_) 1 MHz, and ISPAN) 1 MHz. 11. Press MARKER MARKER a. CPEAK SEARCH 12. Key in CREsBW) 100 kHz, [-SPAN) 200 kHz, and MARKER SEARCH). PEAK 13. Adjust A4A4R43 LC to align markers on display. MARKER A level should indicate 1.00 X.
  • Page 194 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.
  • Page 195: Location Of A4a8 21.4 Mhz Crystal Filter Adjustments

    8. 21.4 MHz Bandwidth Filter Adjustments 33. Key in t-1 100 kHz, C-1 200 kHz, and MARKER SEARCH]. PEAK 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.
  • Page 196 8. 21.4 MHz Bandwidth Filter Adjustments 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 bandwidth amplitudes. If amplitude of 300 kHz bandwidth is low but amplitude of 100 kHz and 1 MHz bandwidths are within tolerance, LC DIP adjustments must be performed.
  • Page 197 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 peak.
  • Page 198: Db Bandwidth Adjustments

    9. 3 dB Bandwidth Adjustments Reference IF-Display Section A4A9 IF Control Related Performance Resolution Bandwidth Accuracy Test Test Description 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.
  • Page 199 9. 3 dB Bandwidth Adjustments A4A9 IF CONTROL A4A3 Figure 3-45. Location of 3 dB Bandwidth Adjustments 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 two markers;...
  • Page 200 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 20 kHz. If SPAN) FREQUENCY necessary, readjust PREFERENCE...
  • Page 201: Step Gain And 18.4 Mhz Local Oscillator Adjustments Setup

    10. Step Gain and 18.4 MHz Local Oscillator Adjustments 10. Step Gain and 18.4 MHz Local Oscillator Adjustments Reference IF-Display Section A4A7 3 MHz Bandwidth Filter A4A5 Step Gain Related Performance Resolution Bandwidth Selectivity Test Tests IF Gain Uncertainty Test Center Frequency Readout Accuracy Test Description First, the IF signal from the RF Section is measured with a power...
  • Page 202 10. Step Gain and 18.4 MHz Local Oscillator Adjustments Equipment Digital Voltmeter (DVM) ......HP 3456A Power Meter ........HP436 A Power Sensor .
  • Page 203: 10. Step Gain And 18.4 Mhz Local Oscillator Adjustments

    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.
  • Page 204 10. Step Gain and 18.4 MHz Local Oscillator Adjustments 1 dB Gain Step Checks 22. Key in -19.9 dBm. Set step attenuators to 15 REFERENCE LEVEL dB. Press MARKER @ twice to establish a new reference. 23. Key in -17.9 dBm. Set step attenuators to 13 REFERENCE LEVEL 24.
  • Page 205: Location Of .l Db Gain Step, 18.4 Mhz Lo, And + 1ov

    10. Step Gain and 18.4 MHz Local Oscillator Adjustments A4A5 S T E P G A I N Cl0 F R E O “ R Z E R O C O A R S E C9 +lOV A D J A4A5 Figure 3-49.
  • Page 206: Down/up Converter Adjustments

    11. Down/Up Converter Adjustments Reference IF-Display Section A4A6 Down/Up Converter Related Performance Resolution Bandwidth Switching Uncertainty Test Test Description 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.
  • Page 207 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 A4A6Al assembly is replaced or the A4A6Al 21.4 MHz Bandpass Amplifier Filter is worked on.
  • Page 208 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.
  • Page 209: Time Base Adjustment (sn 2840a And Below, Also 32 17ao5568 And Above)

    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 RF Section: A27Al 10 MHz Quartz Crystal Oscillator Related Performance Center Frequency Readout Accuracy Test Test Description The frequency of the internal 10 MHz Frequency Standard is...
  • Page 210 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.
  • Page 211 12. Time Base Adjustment (SN 2840A and Below, also 3217A05568 and Above) 6. Set the Frequency Counter controls as follows: INPUT ......... . . A ATTENUATION .
  • Page 212: Location Of A27al Adjustment

    12. Time Base Adjustment (SN 2840A and Below, also 3217A05568 and Above) Reading 11: 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.
  • Page 213: Time Base Adjustment (sn 2848a To 3217a05567)

    12. Time Base Adjustment (SN 2848A to 3217A05567) 12. Time Base Adjustment (SN 2848A to 3217A05567) Reference RF Section: A27Al Frequency Standard Regulator A27A2 10 MHz Quartz Crystal Oscillator Related Performance Center Frequency Readout Accuracy Test Test Description The frequency of the internal 10 MHz Frequency Standard is compared to a known frequency standard and adjusted for minimum frequency error.
  • Page 214 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.
  • Page 215 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].
  • Page 216: Location Of A27a2 Adjustment

    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-controlled crystal oscillator (OCXO).
  • Page 217: Mhz Reference Adjustments

    13. 20 MHz Reference Adjustments 13. 20 MHz Reference Adjustments Reference RF Section: Al6 20 MHz Reference Related Performance Calibrator Amplitude Accuracy Test Test Description 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 input from A27 Time Base.
  • Page 218: Location Of 20 Mhz Reference Adjustments

    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.
  • Page 219 13. 20 MHz Reference Adjustments 8566AB Spectrum Analyzer to 20.34 MHz and CENTER FREQUENCY 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 halfway.
  • Page 220: Typical Signal At A16tp3

    13. 20 MHz Reference Adjustments Press &K?@ Press CnTavj: AVmarkers ........on Vmarker 1 .
  • Page 221: Mhz Phase Lock Oscillator Adjustments

    14. 249 MHz Phase Lock Oscillator Adjustments 14. 249 MHz Phase Lock Oscillator Adjustments Reference RF Section: A7 249 MHz Phase Lock Oscillator Description 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.
  • Page 222: Location Of 249 Mhz Phase Lock Oscillator Adjustments

    LINE switch to STANDBY, and place A7 249 MHz PLO on extender (with DVM still connected to A7TPl). Set LINE switch to ON and key in [RECALL_) 2 on HP 8568B S p e c t r u m A n a l y z e r .
  • Page 223 Press (SAVE_) 1 on HP 8568B Spectrum Analyzer. Set LINE switch to STANDBY and place A7 249 MHz PLO in HP 8568B Spectrum Analyzer without extender (leave tee connected). Set LINE switch to ON and press CRECALL) 1. Verify that 500 kHz remains less than -90 dBm in amplitude.
  • Page 225: 15. 275 Mhz Phase Lock Oscillator Adjustment

    15. 275 MHz Phase Lock Oscillator Adjustment A18 2 7 5 P H A S E L O C K O S C I L L A T O R C8 PLO,ADJUST Figure 3-62. Location of 275 MHz PLO Adjustment 7.
  • Page 226: Second If Amplifier And Third Converter Adjustment

    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 A19 Second IF Amplifier. The output of the amplifier is displayed on a scalar network analyzer.
  • Page 227 SMA (m) to (m) ....... 5061-5458 Procedure Position instrument on right side as shown in Figure 3-63, with bottom cover removed. Set LINE switch to ON and press HP 8568B, HP QNST PRESET 8566A/B, HP 8757A, and HP 8340A/B. Second IF Amplifier...
  • Page 228: Location Of 301.4 Mhz Bpf And 280 Mhz Amptd

    16. Second IF Amplifier and Third Converter Adjustment 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).
  • Page 229: Minimum Image Response At 258.4 Mhz

    16. Second IF Amplifier and Third Converter Adjustment Note Place the Markers as accurately as possible within the cursor markers for maximum frequency accuracy. 18. On the synthesized sweeper, press @G-X-n). M3 - M4 should read between 7 and 14 MHz. 19.
  • Page 230: Pilot Second If Amplifier Adjustments

    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.
  • Page 231 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 on HP 8568B GNST PRESET (DUT), HP 8757A, and HP 8340A/B. 3. Connect 20 dB Attenuator and power splitter to RF OUTPUT of synthesized sweeper.
  • Page 232: Location Of 269 Mhz Bandpass Filter Adjustments

    17. Pilot Second IF Amplifier Adjustments A9 P I L O T A10 P I L O T 2ND I F A M P L I F I E R 3RD C O N V E R T E R 269MHz BANDPASS F I L T E R Figure 3-68.
  • Page 233: Frequency Control Adjustments

    18. Frequency Control Adjustments 18. Frequency Control Adjustments Reference RF Section: A22 Frequency Control Related Performance Sweep Time Accuracy Test Tests Frequency Span Accuracy Test Center Frequency Readout Accuracy Test Description The sweep reference voltage is adjusted and then the sweep times are adjusted for proper tolerances.
  • Page 234: Location Of Frequency Control Adjustments

    18. Frequency Control Adjustments S T A R T F M S P A N F R E O U E N C Y C O N T R O L S T O P T I L T Y T O -SD VT0 TlJNE R E F R E F...
  • Page 235 18. Frequency Control Adjustments Full Sweep 11. Repeat Start-Up Time Measurement procedure in step 8 and step 9 Adjustment of 20 ms. Note value of measurement. SWEEP TIME 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 time noted in step ll)*O.l ms.
  • Page 236 18. Frequency Control Adjustments Key in 1023 Hz. (ml [CF SIZE) J STEP 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.
  • Page 237: Second Converter Adjustments

    19. Second Converter Adjustments 19. Second Converter Adjustments Reference RF Section: A23 RF Converter Related Performance RF Gain Uncertainty Test Spurious Responses Test T e s t Description First, the second LO frequency is adjusted for proper frequency and then the LO shift is adjusted using the front-panel keys to shift the LO up and down.
  • Page 238: Location Of Second Converter Adjustments

    2. Position instrument on right side as shown in Figure 3-72 with the RF Converter removed but with cables still connected. Second LO Frequency 3. Set HP 8568B Spectrum Analyzer LINE to ON and press and Shift Adjustments (JNSTR PRESET].
  • Page 239 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.
  • Page 240 19. Second Converter Adjustments Second Converter 27. Key in 0 Hz. m (JJ) T, [ FREQUENCY SPAN Bandpass Filter 28. On the synthesized sweeper, key in ICF) 240 MHz, a 50 MHz, Adjustments 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 panel) to the proper rear-panel connectors on the scalar network analyzer as shown in Figure 3-73.
  • Page 241: Typical Pilot 2nd If Bandpass (shift T)

    19. Second Converter Adjustments Figure 3-74. Typical PILOT 2ND IF Bandpass (SHIFT t) Figure 3-75. Typical PILOT 2ND IF Bandpass (SHIFT 1) Key in [*] 0) u and note amplitude of signal. Key in ISHIFT) @a T and note amplitude of the bandpass signal peak. 43.
  • Page 242: Typical Bandpass (shift T)

    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.
  • Page 243 (M3 - M4) shown on the ENTRY DISPLAY. Press C-1 OFF. See Figure 3-74 and Figure 3-75. 57. Disconnect all test equipment from HP 8568B Spectrum Analyzer and reconnect all cables within the instrument: cable 80 (gray/black) between A23A3J6 and A9J1, and cable 92 (white/red) between A23A3J5 and A19Jl.
  • Page 244: Mhz Voltage-tuned Oscillator Adjustments

    20. 50 Voltage-Tuned Oscillator Adjustments Reference RF Section: All 50 MHz Voltage-Tuned Oscillator (VTO) Related Performance Frequency Span Accuracy Test Test Center Frequency Readout Accuracy Test Description First, the voltage reference for the Shaping network is set by measuring the voltage required to tune the 50 MHz Oscillator to its high limit (57.5 MHz) and then setting the reference voltage (+ 15 VR) to that voltage.
  • Page 245: Mhz Voltage-tuned Oscillator Adjustments

    20. 50 MHz Voltage-Tuned Oscillator Adjustments DACS Accuracy Check 3. Connect DVM to A22TP9 and ground lead to A22TP12. Key in J 0 Hz. If using an HP3456A DVM, [SHIFT) [CF SIZE] STEP pressISTORE_)aZ, way, a, (STORE)@JY, then If not using an HP 3456A DVM, note voltage @El 0 (X-Z)/Y.
  • Page 246 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 Key in J 112 kHz and Cm) I-1 N. LSHIFT) (CF STEP SIZE End Adjustment...
  • Page 247: 1. Slope Compensation Adjustments

    Frequency Response Test 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 on the HP 8568B Spectrum Analyzer CRT and the slope compensation (TILT) adjustment is performed to compensate for the frequency response roll-off of the first mixer.
  • Page 248 SWEEP ........SINGLE 10. Set HP 8568B LINE switch to ON and press...
  • Page 249: Slope Compensation Adjustment Waveforms

    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.
  • Page 250: Comb Generator Adjustments

    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 function to prevent the instrument from “locking up”...
  • Page 251: Comb Teeth Display

    22. Comb Generator Adjustments Equipment Cable, SMA (m) to SMA (m) ....HP 85680-20094 Procedure 1. Set instrument LINE switch to ON and press ~NSTR PRESET Connect CAL OUTPUT to SIGNAL INPUT 2.
  • Page 252 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.
  • Page 253: Analog-to-digital Converter Adjustments

    23. Analog-To-Digital Converter Adjustments Analog-To-Digital Converter Adjustments Reference A3A8 Analog-to-Digital Converter Description 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 toggles high to low.
  • Page 254: Location Of Analog-to-digital Converter Adjustments

    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.
  • Page 255 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.
  • Page 256: Track And Hold Adjustments

    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.
  • Page 257: Location Of Track And Hold Adjustments

    24. Track and Hold Adjustments A6A9AlRll AS ~EOM4LR ES C A L A D J TRIF ‘ L E R M A T C H C A L O U T P U T A6A9Al Figure 3-88. Location of Track and Hold Adjustments Key in m TRACE A [-HOLD].
  • Page 258 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...
  • Page 259: Digital Storage Display Adjustments

    25. Digital Storage Display Adjustments 25. Digital Storage Display Adjustments Reference A3A 1 Trigger A3A2 Intensity Control A3A3 Line Generator Description First, preliminary CRT graticule adjustments are performed to position the graticule on the CRT. These preliminary adjustments assume that repair has been performed on the associated circuitry.
  • Page 260: Location Of Digital Storage Display Adjustments

    Digital Storage Display Adjustments 2 5 . A-IA? A3A3 L I N E A3Al I N T E N S I T Y G E N E R A T O R T R I G G E R C O N T R O L A3A3 X S &...
  • Page 261: Sample And Hold Balance Adjustment Waveforms

    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.
  • Page 262 25. Digital Storage Display Adjustments Connect oscilloscope to A3A3TP7. Adjust A3A2R51 Y S&H BAL for minimum dc offset between the level of the signal inside the two pulses to the signal level outside the two pulses. Set LINE switch to STANDBY. Reinstall A3A3 Line Generator in instrument without extender boards.
  • Page 263 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 TRACE A @iZQ. QNSTR PRESET 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 line (right, left, top, or bottom) but does not overshoot.
  • Page 264: Low-noise Dc Supply

    Low-Noise DC The Low-Noise DC Supply shown in Figure 3-93 can be constructed using the parts listed in ‘Ikble 3-7. SUPPlY O U T P U T OVdc, t2Vdc o r +lO V d c Figure 3-93. Low-Noise DC Supply ‘Ihble 3-7.
  • Page 265: Crystal Filter Bypass Network Configuration

    Crystal Filter Bypass Network Configuration Crystal Filter The Crystal Filter Bypass Network Configuration shown in Figure 3-94 Bypass Network 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 Configuration IF crystal-filter bypass networks used with the A4A4 and A4A8 assemblies.
  • Page 266: Option 462 Introduction

    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 which impulse bandwidths are specified, use the tests and adjustment under “Impulse Bandwidths”...
  • Page 267: Db Resolution Bandwidth Accuracy Test

    4. 6 dB Resolution Bandwidth Accuracy Test Related Adjustment 6 dB Bandwidth Adjustments Specification &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”...
  • Page 269: Impulse And Resolution Bandwidth Accuracy Test

    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 Hz to 10 Hz (6 dB bandwidths) Description A frequency synthesizer and pulse/function generator are used to input pulses to the spectrum analyzer.
  • Page 271 4. Impulse and Resolution Bandwidth Accuracy Test Tl to 30 kHz. On the Set the frequency synthesizer (FREQUENC‘ spectrum analyzer key in 3011 SWEEP TIME] FREQUENCY RKER Record 0.5 seconds, SWEEP (SINGLEI), MA PEAK SEARCH MARKER amplitude in Table 4 Calculate the Impulse BW of the 300 kHz filter using the formula in step 8.
  • Page 273: Db Resolution Bandwidth Measurement

    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. 3.103 MHZ REF -9.0 dBm ATTEN 10 129 0.00 dB LINEAR Figure 4-3. 6 dB Resolution Bandwidth Measurement 46.
  • Page 274 4. Impulse and Resolution Bandwidth Accuracy Test ‘Ihble 4-3. 6 dB Resolution Bandwidth Accuracy MARKER A Readout of 6 dB Frequency Span Bandwidth Minimum Actual Maximum 3 MHz (i) 5 MHz 2 MHz 1 MHz (i) 500 kHz 300 kHz (i) 200 kHz 100 kHz (i) 30 kHz (i)
  • Page 275: Db Resolution Bandwidth Selectivity Test

    5. 6 dB Resolution Bandwidth Selectivity Test Related Adjustments 3 MHz Bandwidth Filter Adjustments 21.4 MHz Bandwidth Filter Adjustments Step Gain and 18.4 MHz Local Oscillator Adjustments Specification 60 dB/6 dB bandwidth ratio: ~11: 1, 3 MHz to 100 kHz bandwidths ~8: 1, 30 kHz to 30 Hz bandwidths 60 dB points on 10 Hz bandwidth are separated by ~100 Hz Description...
  • Page 276: Db Bandwidth Measurement

    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.
  • Page 277 5. 6 dB Resolution Bandwidth Selectivity Test ‘Ikble 4-4. 6 dB Resolution Bandwidth Selectivity Measured Measured Bandwidth Maximum Spectrum Analyzer 60 dB 6 dB Selectivity Selectivity Ratio VlDEoj 160 dB BW + 3andwidth Bandwidth 6 dB BW) 3 MHz 100 Hz 11:l 20 MHz 1 MHz...
  • Page 279: Impulse And Resolution Bandwidth Selectivity Test

    5. Impulse and Resolution Bandwidth Selectivity Test HKR P i 4.04 HHZ Al-TEN 30 a0 REF 0 . 0 10 d0 - 0 . 1 0 aw 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 dB *0.50 dB).
  • Page 280 5. Impulse and Resolution Bandwidth Selectivity Test ‘Ihble 4-5. Impulse and Resolution Bandwidth Selectivity Spectrum Analyzer Measured Measured Bandwidth Maximum 60 dB 6 dB Selectivity Selectivity Frequency ‘EG” Bandwidth Bandwidth (60 dB BW Ratio Span t 6 dB BW) 3 MHz (i) 20 MHz 100 Hz 11:l 1 MHz (i)
  • Page 281 6. Impulse and Resolution Bandwidth Switching Uncertainty Tkst Related Adjustment 3 MHz Bandwidth Filter Adjustments 21.4 Bandwidth Filter Adjustments Down/Up Converter Adjustments Specification 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 100 kHz bandwidth switching uncertainty figures only applicable 190% Relative Humidity.
  • Page 282: Impulse And Resolution Bandwidth Switching Uncertainty Test

    6. Impulse and Resolution Bandwidth Switching Uncertainty Test 0 HZ REF 53.0 d0m ATTEN 10 d8 0.00 dB l d B’ t-H+ M A R <ER rl Figure 4-6. Bandwidth Switching Uncertainty Measurement T&ble 4-6. Bandwidth Switching Uncertainty Allowable Frequency Deviation Span (MKR A...
  • Page 283: Performance Test Record

    Test 4. 6 dB Resolution Bandwidth Accuracy Test (p/o ‘lhble 2-19, Performance Test Record) Step 8. 6 dB Resolution Bandwidth Accuracy ‘RES) Readout of 3 dB Bandwidth FREQUENCY SPAN) Actual 3MHz 5MHz 2.400 MHz 3.600 MHz 1MHz 2 MHz 1.100 MHz 900kHz 300kHz 500kHz...
  • Page 284: Test 4. Impulse And Resolution Bandwidth Accuracy

    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) Steps 1 through 38. Impulse Bandwidth Accuracy Calculated Impulse Bandwidth Marker Readouts for: @ai-- Minimum Actual Maximum High Frequency Low Frequency...
  • Page 285 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 3 MHz (i) 5 MHz 1 MHz (i) 2 MHz 300 kHz (i) 500 kHz 100 kHz (i) 200 kHz 30 kHz (i) 50 kHz...
  • Page 286 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 Maximum Spectrum Analyzer Measured Measured Bandwidth 60 dB 6 dB Selectivity Selectivity Ratio @?iFEF) (...
  • Page 287 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 Measured Measured Bandwidth Maximum Spectrum Analyzer Selectivity Selectivity 60 dB Fr~f~~cy ‘f;” Bandwidth Bandwidth (60 dB BW Ratio -6dBBW) 3 MHz (i) 20 MHz 100 Hz...
  • Page 288 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 Switching Uncertainty Deviation Allowable Frequency Span (MKR A Deviation Readout, dB)
  • Page 289: Db Resolution Bandwidth Adjustments

    9. 6 dB Resolution Bandwidth Adjustments Reference IF-Display Section A4A9 IF Control Related Performance 6 dB Resolution Bandwidth Accuracy Test Test Description The CAL OUTPUT signal is connected to the RF INPUT. Each of the adjustable resolution bandwidths is selected and adjusted for the proper bandwidth.
  • Page 290: Location Of Bandwidth Adjustments

    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. f’ A4A9 I F C O N T R O L VI-m-m ~000000000000000000 n 000000000000000000 r A4A9...
  • Page 291 9. 6 dB Resolution Bandwidth Adjustments 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 using the DATA knob.
  • Page 292: Impulse Bandwidth Adjustments

    9. Impulse Bandwidth Adjustments 9. Impulse Bandwidth Adjustments Reference IF-Display Section A4A9 IF Control Related Performance Impulse Bandwidth Accuracy Test Test Description 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 bandwidth.
  • Page 293: Location Of Bandwidth Adjustments

    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 I F C O N T R O L Figure 4-8.
  • Page 294 9. Impulse Bandwidth Adjustments and using the DATA knob to place the signal REFERENCE LEVEL 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 7.3 dB point;...
  • Page 295: Option 857 Introduction

    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..
  • Page 296: Option 857 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 display (20 - 30°C).
  • Page 297 12. Option 857 Amplitude Fidelity Test Equipment Frequency Synthesizer ....... . . HP 3335A Adapter, Type N (m) to BNC (f) .
  • Page 298 12. Option 857 Amplitude Fidelity Test ‘Ikble 5-1. Log Amplitude Fidelity (10 Hz RBW; Option 857) Frequency Fidelity Error Cumulative Cumulative Synthesizer Calibrated MARKER A Amplitude (Column 2 - Column 1) Error Error Amplitude Amplitude 0 to 80 dB 0 to 90 dB Step (ref) 0 (ref)
  • Page 299 12. Option 857 Amplitude Fidelity Test 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 should be SO.6 dB. 21. Subtract the greatest negative fidelity error from the greatest positive fidelity error for calibrated amplitude steps from -10 dB to -90 dB.
  • Page 300 12. Option 857 Amplitude Fidelity Test ‘lhble 5-3. Linear Amplitude Fidelity Allowable Range Frequency MARKER A Synthesizer Amplitude (413% of Reference Level) Amplitude (dBm) 5-6 Option 857...
  • Page 301: Performance Test Record

    Performance Test Record Tested by Hewlett-Packard Company Report No. Model HP 8568B Date Serial No. IF-Display Section RF Section Option 857 5-7...
  • Page 302: Test 12. Option 857 Amplitude Fidelity Test

    Test 12. Option 857 Amplitude Fidelity Test Step 9. Log Amplitude Fidelity (10 Bz RBW; Option 857) Fidelity Error Frequency Zumulative Cumulative MARKER A Amplitude (Column 2 - Column 1) Synthesizer Calibrated Error Error Amplitude Amplitude 0 to 80 dB 0 to 90 dB Step 1 (ref)
  • Page 303 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) - 10.87 -9.21 -17.72 - 1 0 -23.10 Option 857 5-9...
  • Page 304 Major Assembly and Component Locations IF-Display Section See Figure Assembly Figure Index AlAl ..........AlA .
  • Page 305: 6-l

    W24 ..........W25 .
  • Page 306 A26F2 ..........A26F3 .
  • Page 307: L. Rf Section, Top View

    Figure 6-l. RF Section, Top View Major Assembly and Component locations...
  • Page 308: Rf Section, Front View

    423A2 4 2 7 A543 45A2 A5A 1 A5Rl A5AlJl ( I N P U T S E L E C T ) (KEYBOARD) Figure 6-2. RF Section, Front View Major Assembly and Component locations...
  • Page 309: Rf Section, Bottom View

    -15v -5v +2ov +;I$ 1 5A 1 .5A 020403 AiSl A l 1 A5’J 1 A5i4 A?4 A533 Figure 6-3. RF Section, Bottom View Major Assembly and Component locations...
  • Page 310: If Section, Top View (sn 3001a And Below)

    AlAlOCl AlAlOC4 AlA AlA A AITI \.\ \ I ‘i AlAlOC2 AlAlOC3 A4A9 A4A8 A4A7 A4A6 A4A5 A4A4 AIAI 1 A4A3 A4A2 A4Al A3A9 A3A8 A3A7 A3A6 A3A5 A3A4 AlVl A:A3 A3A2 A3Al Figure 6-4. IF Section, Top View (SN 3001A and Below) Major Assembly and Component locations...
  • Page 311: If Section, Top View (sn 3004a And Above)

    AlAlOCl AlA A AlAS Fl 1 AITI AlAlOC4 AlAlOC2 AlAlOC3 A4A3 A4A8 A4A7 A4A6 A4A5 A4A4 A4A3 A4A2 A4Al AlVl ‘A3Al > Figure 6-5. IF Section, Top View (SN 3004A and Above) Major Assembly and Component locations...
  • Page 312: If Section, Front View

    AlVl Figure 6-6. IF Section, Front View Major Assembly and Component locations...
  • Page 313 AlAlO /’ A /w2g /W24 A4AlO ‘W23 ‘W32 ( S N 3004A a n d a b o v e ) AlVl A3AlO Figure 6-7. IF Section, Bottom View 6-10 Major Assembly and Component locations...

Comments to this Manuals

Symbols: 0
Latest comments: