Chapter 12 611
RF Section
A13 Second Converter
c. The voltage should measure +15 Vdc ±0.2 V. If the voltage
measures outside this limit, the A14 frequency control assembly
is probably defective.
d. Press
LINE to turn the spectrum analyzer off. Reconnect W13 to
A14J12, and press
LINE to turn the spectrum analyzer on. Set it
to the following settings:
Center frequency............................................. 300 MHz
Span ......................................................................... 0Hz
12.Move the positive lead of the DVM to A14J19 pin 1. The voltage
should measure between −150 mVdc and −800 mVdc. If the voltage
measures outside this limit, the A13 Second Converter is probably
defective.
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