Agilent Technologies 35670A Service Manual page 222

Troubleshooting the Analyzer
To troubleshoot source and calibrator failures
Step 2. Check the dc offset.
G
• Connect the voltmeter to A5 TP3.
• Press the following keys:
[ ]
LEVEL
0
[ ]
Vpk
[
DC OFFSET
• Rotate the RPG knob while monitoring the voltmeter.
• If the voltmeter's voltage does not change from +2.3 to 2.3 as the dc offset
value is varied between 10 and +10 Vdc, the A5 Analog assembly is
probably faulty.
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Agilent 35670A