3.
Adjustment—Perform an external adjustment of the calibration constants of the device.
The adjustment procedure automatically stores the calibration date and temperature on
the EEPROM to allow traceability.
4.
Self-calibration—Let the PXIe-5423 warm up for 15 minutes before self-calibrating the
PXIe-5423 by clicking the
Self-Calibrate
button in MAX or calling niFgen Self Cal.
5.
Reverification—Repeat the Verification procedure to ensure that the device is operating
within the published specifications after adjustment.
Refer to the following sections to complete each procedure.
Related Information
on page 6
on page 14
Verifying the PXIe-5423
This section provides instructions for verifying the PXIe-5423 specifications.
Self-calibrate the PXIe-5423 and all test instruments before beginning the verification
procedures.
Note
Verification of the PXIe-5423 is complete only after you have successfully
completed all verification tests in this section using the as-found limits.
Note
The performance verification procedures assume that adequate traceable
uncertainties are available for the calibration references.
Related Information
Verifying Timebase Accuracy
Follow this procedure to verify the frequency accuracy of the PXIe-5423 onboard timebase
(TCXO) using an oscilloscope.
Refer to the following table as you complete the following steps.
Table 3. Timebase Accuracy Verification
As-Found Limit
As-Left Limit
±(1.5 ppm + 1 ppm per year
1
)
±0.28 ppm
1
Where time drift starts at the latest external calibration date.
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PXIe-5423 Calibration Procedure
