Frequency Counter Accuracy Test - Agilent Technologies 3458A Calibration Manual

Frequency Counter
Accuracy Test
4. Configure the DMM under test as follows:
-- FREQ
-- Trig SGL
-- FSOURCE ACDCV
-- LEVEL 0,DC
1. Execute FSOURCE ACDCV (specifies the type of signal to be used as
the input signal for frequency measurement).
2. Set the Frequency Standard to output a 1 volt p-p, 1 Hz sine-wave.
Record the exact Frequency Standard Value on the FREQUENCY
TESTS Test Card. Connect the output of the Frequency Standard to
the HI and LO input terminals of the 3458A under test.
3. Execute Trig and record the Unit Under Test Reading on the
FREQUENCY TESTS Test Card.
4. Subtract the 1 Hz Unit Under Test Readings from the 1 Hz Frequency
Standard Value. Record the difference on the FREQUENCY TESTS
Test Card.
5. Change the Frequency Standard to 10 MHz and record the exact
Frequency Standard Value on the FREQUENCY TESTS Test Card.
Execute Trig, and record the Unit Under Test Reading on the
FREQUENCY TESTS Test Card.
6. Subtract the 10 MHz Unit Under Reading from the 10 MHz Frequency
Standard Value. Record the difference on the FREQUENCY TESTS
Test Card.
7. If either of the differences are beyond the limits specified, the
instrument should be adjusted. See Chapter 3, "Adjustment
Procedures," to make adjustments.
Chapter 4 Performance Verification Tests 49