To check the output of the CALIBRATOR
In this test, you measure the output of the
rear-panel DC CALIBRATOR
OUTPUT with a multimeter. The
CALIBRATOR
is used for self-calibration of
the HP 54645A/D. The accuracy of the
CALIBRATOR
is not specified, but it
must be within the test limits to provide for accurate self-calibration.
The
CALIBRATOR
output produces DC voltages between 0 and 5V during
vertical calibration.
Test limits:
DC calibrator: 5.000 V
±
10 mV and 0.000 V
±
500
µ
V
Table 7-4
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
CALIBRATOR
connector.
2
Press
Print/Utility
.
3
Press the
Service Menu
softkey, then the
Self Test
softkey, and then 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."
4
Press any key once to advance the test.
The multimeter should read 5.000 V
±
10 mV. If the result is not within the
test limits, see "Troubleshooting the Oscilloscope."
5
Press any key once to end this test.
Testing, Adjusting, and Troubleshooting
To check the output of the CALIBRATOR
7-15
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