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To troubleshoot auto-range failures
Use this test to check the auto-range and overload detector circuits on the A1/A2 Input
assembly. This test assumes that calibration and all self tests passed.
•
Set the power switch to on ( l ).
•
Press the following keys:
[
System Utility ]
[
CALIBRATN ]
[
AUTO CAL OFF ]
[
Inst Mode ]
[
CHANNELS 4 ]or[CHANNELS 2 ]
[
Input ]
[
ALL CHANNELS ]
[
CH* FIXED RANGE ]
1
[ dBVrms ]
[
Source ]
[
SOURCE ON ]
[
LEVEL ]
1
[ dBVrms ]
[
System Utility ]
[
MORE ]
[
SERVICE TESTS ]
[
SPCL TEST MODES ]
[
SOURCE LEVEL ]
The Half range LEDs for all channels should be on and the Over range LEDs
should be off.
•
Press the following keys:
[
Source ]
[
LEVEL]
5
[
dBVrms ]
The Half range and Over range LEDs for all channels should be on.
•
Press the following keys:
[
Input ]
[
CH* AUTO RANGE ]
After the auto-range routine is finished, the Half range LEDs should be on and the
Over range LEDs should be off.
Agilent 35670A Troubleshooting the Analyzer
To troubleshoot auto-range failures
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