National Instruments PXIe-5423, Calibration Procedure

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• Amplitude : Amplitude range listed in the AC Amplitude Accuracy Verification table
• Offset : 0 V
4. Wait 1 second for settling.
5. Measure the AC amplitude (V
RMS
) using the DMM and record this as
AC Amplitude
Measured
.
6. Convert the recorded AC Amplitude
Measured
voltage from V
RMS
to V
pk-pk
using the
following formula:
V
pk − pk
= V
RMS
* 2 2
7. Calculate the AC amplitude error using the following formula:
AC Amplitude Error (mV) = ( AC Amplitude
Measured
- Expected Amplitude ) * 10
3
where Expected Amplitude is the expected amplitude (V
pk-pk
) listed in the AC Amplitude
Accuracy Verification table.
8. Compare the AC amplitude error to the appropriate limit from the AC Amplitude
Accuracy Verification table.
9. Repeat steps 2 through 8 for each configuration listed in the AC Amplitude Accuracy
Verification table.
10. If you are verifying a two-channel PXIe-5423, complete the following steps to verify
CH 1:
a)
Abort waveform generation on the PXIe-5423.
b) Disconnect the SMA (m)-to-BNC (m) cable from CH 0 and connect it to CH 1 of the
PXIe-5423.
c) Repeat steps 2 through 9.
Verifying Passband Flatness Accuracy
Follow this procedure to verify the passband flatness accuracy of the PXIe-5423 by comparing
the flatness sourced by the PXIe-5423 to the value measured by the power sensor.
Refer to the following table as you complete the following steps.
Table 6. Passband Flatness Accuracy Verification
Amplitude Range
(V
pk-pk
)
Frequency (MHz) As-Found Test
Limit (dB)
As-Left Test Limit
(dB)
1 3.500 0.05 — —
2 1 ±0.40 ±0.25
3 20 ±0.60 ±0.14
4 40 ±0.80 ±0.20
PXIe-5423 Calibration Procedure | © National Instruments Corporation | 11