Equipment Required
See ‘’Recommended Test Equipment’’ starting on page 1-17 for tables listing
recommended equipment. Any equipment which meets the critical specifications
given in the tables may be substituted for the recommended model.
Troubleshooting Hints
•
Incorrect bias supply voltages can cause false diagnostic messages. In most
troubleshooting procedures, the power supply voltages are not checked. If you
suspect incorrect supply voltages to an assembly, use the ‘’Voltages and Signals’’
chapter to check the voltages at the assembly.
•
Cables can cause intermittent hardware failures.
•
Noise or spikes in the power supply can cause the analyzer to fail.
•
Measurements in this chapter are only approximate (usually 1 dB or 10%) unless
stated otherwise.
•
Use chassis ground for all measurements in this chapter unless stated otherwise.
•
To determine your firmware version code, press [ System Utility ][MORE ]
[
S/N VERSION ].
•
Logic levels in this chapter are either TTL level high or TTL level low unless stated
otherwise. Toggling signal levels continually change from one TTL level to the
other.
•
The troubleshooting tests in this chapter assume only one independent failure.
Multiple failures can cause false results.
•
The troubleshooting procedures do not isolate failures to cables or connectors. If
you suspect a cable or connector failure, check the device for continuity.
•
If you abort a self test before the self test is finished, the analyzer may fail its
calibration routine. To prevent this from happening press [ Preset ][DO PRESET ]
or cycle power after you abort the self test.
Agilent 35670A Troubleshooting the Analyzer
4-3
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