4. Self-calibration—Let the PXIe-5413 warm up for 15 minutes before self-calibrating the
PXIe-5413 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
Verifying the PXIe-5413 on page 6
Adjusting the PXIe-5413 on page 14
Verifying the PXIe-5413
The performance verification procedures assume that adequate traceable uncertainties are
available for the calibration references.
Self-calibrate the PXIe-5413 and all test instruments before beginning the verification
procedures.
Note Verification of the PXIe-5413 is complete only after you have successfully
completed all verification tests in this section using the as-found limits.
Related Information
Calibration Overview on page 5
Verifying Timebase Accuracy
Follow this procedure to verify the frequency accuracy of the PXIe-5413 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. Connect one end of the SMA (m)-to-SMA (m) cable to a channel of the PXIe-5413 and
the other end to a channel of the oscilloscope.
Note Timebase accuracy verification can be performed on either channel of
the two-channel PXIe-5413.
2. Lock the oscilloscope to the precision frequency reference using the PXI Clock.
1
Where time drift starts at the latest external calibration date.
6 | ni.com | PXIe-5413 Calibration Procedure
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