Troubleshooting 4
5000 Series Oscilloscopes Service Guide 65
6 If you still do not see the waveform, use the troubleshooting
flowchart in this chapter to isolate the problem.
To compensate the analog probes
You should compensate your analog probes to match their
characteristics to the oscilloscope’s channels. A poorly
compensated probe can introduce measurement errors.
1 Perform the procedure “To verify basic oscilloscope
operation” on page 64
2 Use a nonmetallic tool to adjust the trimmer capacitor on the
probe for the flattest pulse possible. The trimmer capacitor is
located on the probe BNC connector.
Figure 10 Example pulses
3 Connect probes to all other analog channels (channel 2 of a
2-channel oscilloscope, or channels 2, 3, and 4 of a 4-channel
oscilloscope). Repeat the procedure for each channel. This
matches each probe to each channel.
The process of compensating the probes serves as a basic test
to verify that the oscilloscope is functional.
comp.cdr
Perfectly compensated
Over compensated
Under compensated
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