Chapter 11 595
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 spectrum analyzer off, reconnect W13 to
A14J12, and press
LINE to turn spectrum analyzer on. Set the HP
8560E/EC to the following settings:
Center frequency .............................................. 300MHz
Span ..........................................................................0Hz
13.Move the positive lead of the DVM to A14J19 pin 1. The voltage
should measure between −150 m Vdc and −800 mVdc. If the voltage
measures outside this limit, the A13 Second Converter is probably
defective.
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