CALIBRATION PROCEDURE FOR SPECTRUM ANALYZER AN/USM-489(V)1 (TEKTRONIX, TYPE 492 W/OPTIONS 01, 02, 03, 08, AND 21)
SECTION I. IDENTIFICATION AND DESCRIPTION
Table 1. Calibration Description Continued.
Table 1. Calibration Description Continued.
Table 1. Calibration Description Continued.
SECTION II. EQUIPMENT REQUIREMENTS
SECTION III. CALIBRATION PROCESS
Equipment Setup
Frequency Accuracy
Table 3. Harmonic Number (n) Versus Frequency Range
Figure 2. Z-Axis Test Point Locations.
Figure 3. High Voltage Circuit Board (Later Version).
Figure 4. High Voltage Circuit Board (Early Version).
Figure 5. Deflection Amplifier - Equipment Setup.
Figure 6. Deflection Amplifier - Adjustment and Test Point Locations.
Frequency Accuracy - Continued
Figure 7. Sweep Timing - Equipment Setup.
Figure 8. 1st LO Balance and Span Adjustment and Test Points.
Frequency Accuracy - Continued
Frequency Accuracy - Continued
Frequency Accuracy - Continued
Figure 9. 2d LO Tuning Adjustment - Bottom View.
Frequency Accuracy - Continued
Figure 11. Baseline Leveling - Equipment Setup.
Figure 12. Video Processor - Adjustment and Test Point Locations.
Figure 13. Baseline Leveling - Typical Display Response Before and After Adjustments.
Frequency Accuracy - Continued
Figure 14. Typical Response Displays When Adjusting Compensation of Baseline Leveling Circuits
Figure 15. Log Amplifier - Equipment Setup.
Figure 16. Log and Video Amplifier - Adjustment Locations.
Frequency Accuracy - Continued
Figure 17. Adjustment Locations - VR #2 Module.
Frequency Accuracy - Continued
Figure 19. 100 kHz Filter Response.
Figure 20. Adjustment Location - VR #1 Module.
Table 4. Filter Leveling.
Figure 21. IF Gain - Adjustment Locations.
Frequency Accuracy - Continued
Figure 22. Digital Storage Adjustment Location (SN B043115 and Above).
Figure 24. Band Leveling - Equipment Setup.
Table 5. External Mixer Band Leveling Adjustments.
Figure 25. Preselector Drive - Adjustments and Test Point Locations.
Frequency Accuracy - Continued
Frequency Accuracy - Continued
Figure 26. RF Attenuation - Equipment.
Figure 27. RF Attenuator Accuracy.
IF Gain and Display Accuracy
Display Accuracy and Range
Amplitude Variation with Change in Resolution Bandwidth
Frequency Response
Figure 28. Frequency Response - Equipment Setup.
Frequency Response - Continued
Figure 29. Preselector Ultimate Rejection - Equipment Setup.
Frequency Span/Div
Table 6. Span/Division vs Time Markers.1
Figure 30. Frequency Span/Div - Equipment Setup.
Time/Div
Pulse Stretcher
Table 8. Time/Division Accuracy Check.
Figure 31. Resolution Bandwidth and Shape Factor.
Table 9. Average Noise Level dBm (Maximum) (-30 dBm).
Frequency Drift
Figure 32. Frequency Drift Measurement.
Figure 33. Noise Sidebands Measurement.
Figure 34. Digital Storage Measurement.
Triggering Operation and Sensitivity
Figure 35. External Trigger - Equipment Setup.
Power Supply
SECTION I. IDENTIFICATION AND DESCRIPTION
Table 1. Calibration Description Continued.
Table 1. Calibration Description Continued.
Table 1. Calibration Description Continued.
SECTION II. EQUIPMENT REQUIREMENTS
SECTION III. CALIBRATION PROCESS
Equipment Setup
Frequency Accuracy
Table 3. Harmonic Number (n) Versus Frequency Range
Figure 2. Z-Axis Test Point Locations.
Figure 3. High Voltage Circuit Board (Later Version).
Figure 4. High Voltage Circuit Board (Early Version).
Figure 5. Deflection Amplifier - Equipment Setup.
Figure 6. Deflection Amplifier - Adjustment and Test Point Locations.
Frequency Accuracy - Continued
Figure 7. Sweep Timing - Equipment Setup.
Figure 8. 1st LO Balance and Span Adjustment and Test Points.
Frequency Accuracy - Continued
Frequency Accuracy - Continued
Frequency Accuracy - Continued
Figure 9. 2d LO Tuning Adjustment - Bottom View.
Frequency Accuracy - Continued
Figure 11. Baseline Leveling - Equipment Setup.
Figure 12. Video Processor - Adjustment and Test Point Locations.
Figure 13. Baseline Leveling - Typical Display Response Before and After Adjustments.
Frequency Accuracy - Continued
Figure 14. Typical Response Displays When Adjusting Compensation of Baseline Leveling Circuits
Figure 15. Log Amplifier - Equipment Setup.
Figure 16. Log and Video Amplifier - Adjustment Locations.
Frequency Accuracy - Continued
Figure 17. Adjustment Locations - VR #2 Module.
Frequency Accuracy - Continued
Figure 19. 100 kHz Filter Response.
Figure 20. Adjustment Location - VR #1 Module.
Table 4. Filter Leveling.
Figure 21. IF Gain - Adjustment Locations.
Frequency Accuracy - Continued
Figure 22. Digital Storage Adjustment Location (SN B043115 and Above).
Figure 24. Band Leveling - Equipment Setup.
Table 5. External Mixer Band Leveling Adjustments.
Figure 25. Preselector Drive - Adjustments and Test Point Locations.
Frequency Accuracy - Continued
Frequency Accuracy - Continued
Figure 26. RF Attenuation - Equipment.
Figure 27. RF Attenuator Accuracy.
IF Gain and Display Accuracy
Display Accuracy and Range
Amplitude Variation with Change in Resolution Bandwidth
Frequency Response
Figure 28. Frequency Response - Equipment Setup.
Frequency Response - Continued
Figure 29. Preselector Ultimate Rejection - Equipment Setup.
Frequency Span/Div
Table 6. Span/Division vs Time Markers.1
Figure 30. Frequency Span/Div - Equipment Setup.
Time/Div
Pulse Stretcher
Table 8. Time/Division Accuracy Check.
Figure 31. Resolution Bandwidth and Shape Factor.
Table 9. Average Noise Level dBm (Maximum) (-30 dBm).
Frequency Drift
Figure 32. Frequency Drift Measurement.
Figure 33. Noise Sidebands Measurement.
Figure 34. Digital Storage Measurement.
Triggering Operation and Sensitivity
Figure 35. External Trigger - Equipment Setup.
Power Supply
