62
Chapter 4 Calibration Procedures
Low Frequency Flatness Verification
4
Low Frequency Flatness Verification
This procedure checks the AC amplitude flatness at 100 kHz using the
reference measurements recorded in the Amplitude and Flatness
Verification Worksheet. These measurements also establish an error value
used to set the power meter reference. The transfer measurements are
made at a frequency of 100 kHz using both the DMM and the power meter.
1 Set the DMM to measure ac Volts. Connect the DMM as shown in the
figure on page 61.
2 Set the instrument to each output described in the table below and
measure the output voltage with the DMM. Press to set the output
impedance to High-Z. Be sure the output is enabled.
1
Enter the measured value on the worksheet (page 59)
as 100kHz_0dB_reference.
2
Enter the measured value on the worksheet (page 59)
as 100kHz_10dB_reference.
3
Enter the measured value on the worksheet (page 59)
as 100kHz_20dB_reference.
3 Compare the measured voltage to the test limits shown in the table.
4 You have now recorded all the required measurements on the worksheet
(page 59). Complete the worksheet by making all the indicated calculations.
Agilent 33250A Measurement
Output Setup Function Frequency Amplitude Nominal Error
Q High Z Sine Wave 100.000 kHz 670.0 mVrms 0.670 Vrms
1
± 0.0067 Vrms
Q High Z Sine Wave 100.000 kHz 2.0 Vrms 2.000 Vrms
2
± 0.020 Vrms
Q High Z Sine Wave 100.000 kHz 7.000 Vrms 7.000 Vrms
3
± 0.070 Vrms
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