Agilent Technologies 89410A Service Manual page 87

channel analyzer, go to
analyzer failures.''
7 Check frequency sample signals.
a
Place the analyzer on the side closest to the display.
b
Remove the bottom cover.
c
].
Press [Preset
d Using a logic probe, check that the TTL signals listed in the
following table are toggling.
e If any of the signals are incorrect, the A60 Frequency Reference
assembly is probably faulty.
To troubleshoot source and calibrator out failures
page 1-75, ''To troubleshoot two channel
Test Location
A91 P6 pin 4
A91 P6 pin 5
A91 P6 pin 11
A91 P6 pin 16
Troubleshooting the Analyzer
Signal Name
FSAAD
FSASRC
FSA2
FSA1
1-69