61
Chapter 4 Calibration Procedures
AC Amplitude (high-impedance) Verification
4
4
AC Amplitude (high-impedance) Verification
This procedure checks the ac amplitude output accuracy at a frequency
of 1 kHz, and establishes reference measurements for the higher
frequency flatness verification procedures.
1 Set the DMM to measure Vrms Volts. Connect the DMM as shown below.
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.
* Based upon 1% of setting ±1 mVpp (50Ω); converted to Vrms for High-Z.
1
Enter the measured value on the worksheet (page 59) as 1kHz_0dB_reference.
2
Enter the measured value on the worksheet (page 59) as 1kHz_10dB_reference.
3
Enter the measured value on the worksheet (page 59) as 1kHz_20dB_reference.
4
Square wave amplitude accuracy is not specified. This measurement and error
may be used as a guideline for typical operation.
3 Compare the measured voltage to the test limits shown in the table.
Agilent 33250A Measurement
Output Setup Function Frequency Amplitude Nominal Error*
Q High Z Sine Wave 1.000 kHz 20.0 mVrms 0.020 Vrms ± 0.00091 Vrms
Q High Z Sine Wave 1.000 kHz 67.0 mVrms 0.067 Vrms ± 0.00138 Vrms
Q High Z Sine Wave 1.000 kHz 200.0 mVrms 0.200 Vrms ± 0.00271 Vrms
Q High Z Sine Wave 1.000 kHz 670.0 mVrms 0.670 Vrms
1
± 0.00741 Vrms
Q High Z Sine Wave 1.000 kHz 2.000 Vrms 2.0000 Vrms
2
± 0.0207 Vrms
Q High Z Sine Wave 1.000 kHz 7.000 Vrms 7.000 Vrms
3
± 0.0707 Vrms
Q High Z Square Wave
4
1.000 kHz 900.0 mVrms 0.900 Vrms ± 0.0100 Vrms
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