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Step 2. Check the tachometer range function.
Set the oscilloscope for 20 s/div.
Press the following keys:
[
Rtn ]
[
LOOP MODE OFF ]
[
Rtn ]
[
SERVICE TESTS ]
[
SPCL TEST MODES ]
[
SOURCE LEVEL ]
[
Source ]
[
SOURCE ON ]
[
LEVEL ]
500
[ mVpk ]
[
Trigger ]
[
TACHOMETR SETUP ]
[
TRG RANGE +/ 20 ]
Check that the oscilloscope displays a dc voltage of approximately 4 Vdc.
Press [ TRG RANGE +/ 4].
Check that the oscilloscope displays a 4 0.4 Vp-p, 10.24 kHz sine wave,
with 2 ±0.2 Vdc offset.
If the signal is incorrect, the A10 Rear Panel assembly is probably faulty.
If the signal is correct, the A6 Digital assembly is probably faulty.
Agilent 35670A Troubleshooting the Analyzer
To troubleshoot tachometer failures
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