Troubleshooting; Isolating A Trouble To A Circuit Section; Frequency-Response Adjustments; Location Of Frequency-Response And Crystal-Calibrator Adjustments - HP 608E Operating And Service Manual

Section
V
Model 608E/ F
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POWER OUTPUT
10 100 200 300 400
FREQUENCY - (MHz)
Figure 5-18. Frequency-Response Adjustments
R&O
1I7
g. Adjust frequency control from 450 to 455 MHz.
Two beat notes should occur, orie at 450 MHz and one
at 455 MHz.
5-48. TROUBLESHOOTING.
5-49. The following paragraphs contain information
for trOUbleshooting the signal generators, and proce-
dures for isolating troubles in transistor circuits.
The procedures are not intended to correct for Small
out-of-tolerance conditions, but are directed toward
correcting a major fault.
5-50. ISOLATING A TROUBLE TO A CIRCUIT
SECTION.
5-51. To isolate a trouble to a particular circuit, a
troubleshooting tree (table 5-7 ) is presented. The
tree presents five major problems that can occur dur-
ing operation of the signal generators, and Includes
block-to-block instructions for maintenance personnel
to trace a malfunction to a particular circuit. Normal
shoptroubleshoottng practices must be employed after
the trouble has been isolated to the circuit section.
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XTAl fREQ AD!
US
Figure 5-19. Location of Frequency-Response
and Crystal-Calibrator Adjustments
5-18
5-52. As a further aid
in
circuit troubleshooting the
instrument, voltage and resistance measurements are
presented In Figures 5-20 and 5-21. Figure 5-20 lists
the voltage and resistance measurements during INT
1000 - operation, and Figure 5-21 depicts the volt-
age measurements on the ALC board during CW and
PULSE/SET RF OUTPUT operation.
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