Agilent Technologies 35670-90066 manual To troubleshoot input and ADC failures

Agilent 35670A	Troubleshooting the Analyzer
	To troubleshoot input and ADC failures

To troubleshoot input and ADC failures

Use this test to isolate input failures in two channel analyzers to the A1 Input assembly, A5 Analog assembly, or A12 BNC assembly.

Step 1. Check the input path.

G• Set the frequency synthesizer as follows:

Set the oscilloscope as follows:•dc400 mV/div1 MΩ2 Vp-p10 kHzFunctionTime/div 20 ns/divFrequencyAmplitude Sine WaveCH1 V/divCH1 couplingInput Impedance

Probe Atten 1

•Press the following keys:

[ System Utility ]

[ CALIBRATN ]

[ AUTO CAL OFF ] [ Input ]

[ ALL CHANNELS ]

[ CH* FIXED RANGE ] 1

[ Vpk ]

•Connect the frequency synthesizer to the failing channel’s input connector using a BNC cable.

•Using the oscilloscope, BNC-to-SMB cable, and SMB-to-SMB adapter, check the following signals for the failing channel:

Test Location	Amplitude ( 10%)	Probable Faulty
		Assembly
Channel 1
A12 P31 (connected to A1 P100)	2 Vp-p	A12 BNC
A1 P200	2.83 Vp-p	A1 Input
Channel 2
A12 P41 (connected to A1 P600)	2 Vp-p	A12 BNC
A1 P700	2.83 Vp-p	A1 Input

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