Technical data

28 7000 Series Oscilloscopes Service Guide
2 Testing Performance
To test digital channels (MSO models only)
The acquisition system testing provides confidence that the
acquisition system is functioning correctly. It does not, however,
check a particular specification.
1 Disconnect all probes from the circuit under test and from
any other input source.
2 Using probe leads and grabbers, connect digital channels D0,
D1, D2, and D3 to the Probe Comp signal on the center of the
front panel.
3 Press the AutoScale key.
If four square waves appear, the acquisition system is
functioning correctly.
If the square waves do not appear, go to the
“Troubleshooting” chapter. Then return here to finish testing
the digital channels.
4 Disconnect the digital channels from the calibration point.
5 Use steps 2 and 3 to test the following sets of digital
channels. After you test one set of digital channels, remove
them before connecting the next set.
• D4, D5, D6, D7
• D8, D9, D10, D11
• D12, D13, D14, D15
7000 service guide.book Page 28 Thursday, October 16, 2008 12:18 PM