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3-6. DC CAL OUTPUT Test
The DC CAL OUTPUT port on the rear panel is used for instrument calibration and probe calibration.
Though calibrator accuracy is not specified in the performance specifications, it must be within limits in or-
der to provide accurate calibration.
Test Limits:
5.000 V ± 10 mV
Equipment Required:
The following equipment is required for the test.
Equipment Required Critical Specification
Recommended
Model/Part Number
Digital Multimeter
Cable
Adapter
0.1 mV resolution, better than 0.005% accuracy
50 Ω BNC (m to m) 48-inch
50 Ω BNC (f) to Dual Banana Plug
HP 3458A
HP 10503A
HP 1251-2277
Procedure:
1. Use the BNC-to-banana adapter to connect the BNC cable between the multimeter and the oscillo-
scope module DC CAL OUTPUT connector.
2. On the oscilloscope module set the following parameters in the order given:
Menu Selection Setting
Calibration Mode
Procedure
DC Volts
Service Calibration
DC Cal BNC
0 V
3. The DVM should read close to 0.0000 V. Record the reading to four decimal places.
V1 = __________ .
4. In the Calibration menu set the DC Volts to 5 V.
5. The DVM should read close to 5.0000 V. Record the reading to four decimal places.
V2 = __________ .
6. In the Calibration menu set the DC Volts to 0 V.
7. Subtract V1 from V2. The difference should be between 4.990 and 5.010 V. Record the reading in
the performance test record.
HP 16532A - Performance Tests
3-2