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Adjustment Procedures
6. Sampling Oscillator Adjustment
6. Sampling Oscillator Adjustment
Assembly Adjusted
A15 RF assembly
Related Performance Test
There is no related performance test for this adjustment procedure.
Description
The sampling oscillator tank circuit is adjusted for a tuning voltage of
5.05 Vdc when the sampling oscillator is set to 297.222 MHz. The
voltage monitored is actually the tuning voltage divided by 4.05. The
setting is then checked at other frequencies for the full tuning range of
the sampling oscillator.
Figure 2-8
Sampler Adjustment Setup
Equipment
Procedure
1. Press
84
Digital voltmeter ................. .............................................. HP 3456A
DVM test leads ............. .................................................. HP 34118A
to turn the spectrum analyzer off and disconnect the line
LINE
power cord. Remove the spectrum analyzer cover and fold down the
A15 RF and A14 frequency control assemblies. Prop up the A14
frequency control assembly. Reconnect the line power cord and press
to turn the spectrum analyzer on. Connect the equipment as
LINE
illustrated in
Figure 2-8 on page
84.
Chapter 2
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