Agilent Technologies 35670-90066 manual To troubleshoot source and calibrator failures, Source

Agilent 35670A	Troubleshooting the Analyzer
	To troubleshoot source and calibrator failures

To troubleshoot source and calibrator failures

Use this test to isolate source and calibrator failures to the A6 Digital assembly, the A5 Analog assembly, the A1/A2 Input assembly, the A12 BNC assembly, or the A10 Rear Panel assembly.

Step 1. Check the sine wave output.

G• Set the power switch to on ( l ).

•Connect an oscilloscope to the analyzer’s SOURCE connector using a BNC cable.

•Set the oscilloscope as follows:1dcRepetitive400 mV/div50 ΩCH1 V/divInput ImpedanceCH1 CouplingProbe AttenuationDisplay Mode

Time/div	20 ∝s/div
Trigger	Trg’d Sweep
Trig Src	Chan1
Trigger Level	0 V

•Press the following keys:

[ System Utility ]

[ CALIBRATN ]

[ AUTO CAL OFF ]

[ Source ]

[ SOURCE ON ] [ LEVEL ]

1

[ Vpk ]

•If the oscilloscope displays a 10.2 kHz, 2 Vp-p sine wave with no dc offset, go to Step 2.

This is only a quick check of the source sine wave. If the source is suspected of failing at a specific frequency or amplitude, check the source sine wave at the failing frequency or amplitude.

•Using an oscilloscope and a 1:1 probe, check that the signal at A5 TP8 is a 10.2 kHz, 2 Vp-p sine wave with no dc offset.

•If the signal is correct at A5 TP8 and incorrect at the analyzer’s front panel SOURCE connector, the A12 BNC assembly is probably faulty.

•If the signal is correct at A5 TP8 and incorrect at the analyzer’s rear panel SOURCE connector, the A10 Rear Panel assembly is probably faulty.

•If the signal is incorrect, the A5 Analog assembly is probably faulty.

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