To Troubleshoot Source And Calibrator Failures - Agilent Technologies 35670A Service Manual

Agilent 35670A

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 (
• Connect an oscilloscope to the analyzer's SOURCE connector using a BNC
cable.
• Set the oscilloscope as follows:
CH1 V/div
Input Impedance
CH1 Coupling
Probe Attenuation
Display Mode
Time/div
Trigger
Trig Src
Trigger Level
• Press the following keys:
[
System Utility
[
CALIBRATN
[
AUTO CAL
[ ]
Source
[ ON ]
SOURCE
[ ]
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.
).
l
400 mV/div
50 Ω
dc
1
Repetitive
20 µs/div
Trg'd Sweep
Chan1
0 V
]
]
OFF ]
Troubleshooting the Analyzer
To troubleshoot source and calibrator failures
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