3 Calibration Procedures
48 Keysight 34980A Service Guide
Frequency Gain Verification Test
Configuration: Frequency
6½ digits
[SENSe:]FREQuency:APERture 1
1 Make sure you have read “DMM Test Considerations” on page 42.
2 Select the FREQUENCY function and set 6½ digits.
3 Select each range in the order shown below. Provide the input voltage and
frequency indicated. Compare measurement results to the appropriate test
limits shown in the table. (Be certain to allow for appropriate source settling.)
Input
Quick
Check
Error from Nominal
Voltage Frequency Range 24 hour 90 day 1 year
10 mV
[1]
100 Hz 100 mV ± 0.06 Hz ± 0.1 Hz ± 0.1 Hz
1 V 100 kHz 1 V Q ± 6 Hz ± 10 Hz ± 10 Hz
[1] Verify only, No adjustment. For this test, isolate the calibrator’s output from earth ground.
Q: Quick performance verification test points.
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