Agilent Technologies 35670-90066 manual Check external trigger signal to the Analog assembly

Troubleshooting the Analyzer	Agilent 35670A
To troubleshoot trigger failures

Step 4. Check external trigger signal to the Analog assembly.

G• Set the power switch to off ( O ).

•Remove the seven screws holding the rear panel to the analyzer and lean the rear panel back until the A10 Rear Panel assembly is visible. Keep the cables connected.

•Set the power switch to on ( l ).

•Change the frequency synthesizer’s amplitude to 2 Vp-p.

•Set the oscilloscope as follows:100 mV/div1 MΩCH1 V/divInput Impedance

CH1 Coupling	dc
Time/div	200 ∝s/div
Probe Atten	10

•Connect the oscilloscope to A10 TP2 using a 10:1 probe.

•Press the following keys:

[ Trigger ]

[ EXTERNAL TRIGGER ] [ TRIGGER SETUP ]

[ EXT LEVEL USER ] [ EXT RANGE +/− 10 ]

The oscilloscope should display a 370 40 mVp-p square wave.

•If the signal is incorrect, the A10 Rear Panel assembly is probably faulty.

•Set the oscilloscope to 300 mV/div.

• Press [ EXT RANGE +/ 2 ].

The oscilloscope should display a 1.9 0.2 Vp-p square wave.

•If the signal is incorrect, the A10 Rear Panel assembly is probably faulty.

•If the external trigger signals are correct, the A5 Analog assembly is probably faulty.

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