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Amplitude Flatness Verification
This test verifies the output amplitude flatness specification at selected
frequencies. If you use a TVC (recommended) or a wide band ACrms
voltmeter (with a 50
W feed through load), perform this procedure as
described. If you are using a measurement device that requires a transfer
measurement (for example, a power meter), make the transfer in the
reference measurement at 100 kHz.
Set the function generator to the first output indicated in the table below
and make a reference measurement. Select each function generator output
in the table below and adjust the function generator output amplitude until
the measured output is at the reference measurement. Compare the
amplitude level set on the front panel to the test limits shown in the table.
This test is a 50
W output termination test.
Agilent 33120A Measurement
Function
OUT
1
TERM
Ampl Freq Nominal Error
Q Sine wave
50 W
3.0 Vrms 1.00 kHz <reference>
Sine wave
50 W
3.0 Vrms 100.00 kHz <reference>
0.03 Vrms
Sine wave
50 W
3.0 Vrms 500.00 kHz <reference>
0.045 Vrms
Q Sine wave
50 W
3.0 Vrms 1.00 MHz <reference>
0.045 Vrms
Sine wave
50 W
3.0 Vrms 3.00 MHz <reference>
0.06 Vrms
Sine wave
50 W
3.0 Vrms 5.00 MHz <reference>
0.06 Vrms
Sine wave
50 W
3.0 Vrms 7.00 MHz <reference>
0.06 Vrms
Sine wave
50 W
3.0 Vrms 9.00 MHz <reference>
0.06 Vrms
Sine wave
50 W
3.0 Vrms 11.00 MHz <reference>
0.06 Vrms
Sine wave
50 W
3.0 Vrms 13.00 MHz <reference>
0.06 Vrms
Q Sine wave
50 W
3.0 Vrms 15.00 MHz <reference>
0.06 Vrms
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
Amplitude Flatness Verification
60