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PXIe-5665 Calibration Procedure
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© National Instruments
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10. Measure the spectrum analyzer peak power.
11. Calculate the S
pectrum Analyzer Correction Factor
using the following formula:
Spectrum Analyzer Correction Factor =
Corrected Power Sensor Power - Spectrum Analyzer Power
As-Found and As-Left Limits
The as-found limits are the published specifications for the PXIe-5665. NI uses these limits to
determine whether the PXIe-5665 meets the device specifications when it is received for
calibration.
The as-left limits are equal to the published NI specifications for the PXIe-5665, less guard
bands for manufacturing test measurement uncertainty, temperature drift, and drift over time. NI
uses these limits to determine whether the PXIe-5665 meets the device specifications over its
calibration interval.
Verification
The performance verification procedures assume that adequate traceable uncertainties are
available for the calibration references.
In the event of a failure during the verification of the PXIe-5665, perform a calibration of the
individual modules. Return the PXIe-5603 or PXIe-5605 module to NI for calibration and
adjustment, if needed.
Verifying Reference Accuracy
The PXIe-5665 reference accuracy specification is derived from the PXIe-5653 reference
accuracy. For more information about PXIe-5653 calibration values, refer to the
NI PXIe-5653
Calibration Procedure
available at
ni.com/manuals
.
Verifying Phase Noise
The phase noise for the PXIe-5665 system is determined by the phase noise of the PXIe-5653
module. To verify the PXIe-5653 phase noise specification, you must use the phase noise
verification test for the PXIe-5653. For more information about calibration and verification of
the PXIe-5653, refer to the
NI PXIe-5653 Calibration Procedure,
available at
ni.com/manuals
.