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Optional Performance Verification Tests
These tests are not intended to be performed with every calibration.
They are provided as an aid for verifying additional instrument specifications.
Square Wave Duty Cycle Verification
This test verifies the duty cycle specification of the squarewave output.
Select each function generator output in the table below. Use an integrating
DMM to measure the Vdc output of the function generator. Compare the
measured results to the test limits shown in the table. This is a HIGH Z
output termination test.
Agilent 33120A Measurement
Function
OUT
1
TERM
Ampl Freq
Duty
Cycle
Nominal Error
Square wave HIGH Z 1.0 Vrms 300.00 Hz 50% 0.00 Vdc
0.020 Vdc
Square wave HIGH Z 1.0 Vrms 300.00 Hz 25% - 0.50 Vdc
0.020 Vdc
Square wave HIGH Z 1.0 Vrms 300.00 Hz 75% + 0.50 Vdc
0.020 Vdc
The DMM used for this test must be an integrating multimeter. If the
first step does not measure 0 Vdc, use an oscilloscope for this test.
Do not use an auto-ranging function on the DMM for this test. Fix the
DMM measurement range at 10 Vdc.
1
Output termination set using front panel controls. HIGH Z assumes no load on
output. 50W assumes a 50W 0.1W load on output.
Chapter 4 Calibration Procedures
Optional Performance Verification Tests
62