To check the output of the
DC CALIBRATOR
In this test you measure the output of the
DC CALIBRATOR
with a multimeter.
The
DC CALIBRATOR
is used for self-calibration of the oscilloscope. The
accuracy is not specified, but it must be within the test limits to provide for
accurate self-calibration.
Test limits
5.000 V
±
10 mV and 0.000 V
±
500
µ
V.
Table 4-2
Equipment Required
Equipment Critical specifications Recommended
Model/Part
Digital Multimeter 0.1 mV resolution, better than 0.01% accuracy HP 34401A
Cable BNC HP 10503A
1
Connect a multimeter to the rear panel
DC CALIBRATOR
connector.
2
Press
Print/Utility
.
3
Press the
Self Test
softkey, then press the
DAC
softkey.
The multimeter should measure 0.00 V dc
±
500
µ
V. If the result is not
within the test limits, see "Troubleshooting the oscilloscope," on page 4–40.
4
Press any key to continue the test.
The multimeter should read 5.000 V
±
10 mV. If the result is not within the
test limits, see "Troubleshooting the oscilloscope," on page 4–40.
Service
Verifying Oscilloscope Performance
4–6
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