HP 8560A

2
Adjustment Procedures
Introduction
This chapter contains information on automated and manual adjustment procedures for the
HP 8560A spectrum analyzer. Perform the automated procedures using the HP 85629B
Tests and Adjustment Module (TAM). N
ever
perform adjustments as routine maintenance.
Adjustments should be performed after a repair or performance test failure.
Introduction
.........................................................................
..2- 1
Safety Considerations
..............................................................
..2- 2
Which Adjustments Should Be Performed? ..........................................
.2-2
Test Equipment
....................................................................
..2- 2
Adjustable and Factory-Selected Components ........................................
.2-2
Adjustment Tools
..................................................................
..2- 3
Instrument Service Position
........................................................
..2- 3
Using the TAM
.......................................................................
.2-9
Test Equipment ....................................................................
..2- 9
Adjustment Indicator ..............................................................
..2- 9
1. High-Voltage Power Supply Adjustment .........................................
.2-12
2. Display Adjustment
..........................................................
..2-14
3. IF Bandpass Adjustment .......................................................
2-20
4. IF Amplitude Adjustments
.....................................................
2-25
5. DC Log Amplifier Adjustments
................................................
.2-29
6. Sampling Oscillator Adjustment ................................................
2-33
7. YTO Adjustment
.............................................................
..2-3 7
8. First LO Distribution Amplifier Adjustment
....................................
.2-40
9. Tracking Generator Power Level Adjustments
..................................
.2-42
10. Frequency Response Adjustment
..............................................
.2-45
11. Calibrator Amplitude Adjustment
.............................................
2-48
12. 10 MHz Reference Adjustment (Non-Option 003 only)
.........................
.2-50
13. Demodulator Adjustment
....................................................
..2-5 2
14. External Mixer Bias Adjustment ..............................................
.2-55
15. External Mixer Amplitude Adjustment ........................................
.2-57
16. Second IF Gain Adjustment
.................................................
..2-6 0
17. Signal ID Oscillator Adjustment ...............................................
2-63
18. 600 MHz Amplitude Adjustment ..............................................
.2-66
19. 10 MHz Reference Adjustment (Option 003)
.................................. .2-68
20. Tracking Oscillator Adjustment
...............................................
.2-71
Note
Before performing any adjustments, allow the instrument to warm up for 5
minutes.
Adjustment Procedures 2-l