18. 600 Mhz Amplitude Adjustment - HP 8560A Service Manual

18. 600 MHz Amplitude Adjustment

Assembly Adjusted
Al5 RF Assembly
Related Performance Test
There is no related performance test for this adjustment procedure.
Description
The HP 8566 Spectrum Analyzer is used to monitor the CAL OUTPUT signal of the
HP 8560A. Potentiometer R726 is then adjusted to minimize the displayed noise floor and
thus ensure proper input power to the ECL divide-by-two chip.
Equipment
Spectrum Analyzer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 8566
Adapters
Type N (m) to BNC (f) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1250-1476
Cables
Procedure
1. Set the HP 8560A (LINE) switch off, disconnect the power cord, and remove the analyzer's
cover. Fold down the Al5 RF and Al4 Frequency Control assemblies. Prop up the Al4
Frequency Control Assembly.
2. Connect the equipment as shown in Figure 2-21.
3. Reconnect the power cord and set the (LINE) switch on.
2-66 Adjustment Procedures
Figure 2-21. 600 MHz Amplitude Adjustment Setup