PXIe-4466/4467 Calibration Procedure
© National Instruments Corporation 17
3. Configure an AI Voltage channel task using the values in Table 8.
Table 8: AI Flatness Verification Configuration
Configuration Value
Physical channel Dev_name/aix
Gain* Gain from Table 6
Coupling AC
Terminal Configuration Pseudodifferential
Excitation (IEPE) 0 (A)
Acquisition mode Finite number of samples
Rate 250000
Samples Per Channel 125000
*Refer to Table 3 for the maximum and minimum voltages to specify to ensure the specified
gain range is used on the module.
4. Start the task.
5. Acquire the readings with the DUT.
6. Calculate the RMS amplitude of the acquired fundamental
harmonic. The first measured amplitude represents V
1kHz
referenced
in Table 6. Subsequent test points will be calculated based on V
1kHz,
as shown in Table 6.
As an example, use the Extract Single Tone Information VI to help
calculate the RMS. Note that the output of this VI is peak amplitude,
and it must be divided by √2 to convert to RMS.
7. Stop and clear the task.
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