National Instruments NI PXI-5422 用户手册

Always self-calibrate the NI PXI-5422 before beginning a verification procedure. 

This section provides instructions for verifying the NI PXI-5422 
specifications. This section also includes instructions for updating the 
calibration cycle.

Verification determines whether the device is performing within its 
specifications prior to external adjustment. Verification and external 
adjustment together comprise a complete calibration. To verify that the 
NI PXI-5422 still meets its specifications, you must use NI-FGEN to 
control the NI PXI-5422. 

The steps in the verification procedures describe the code that you use to 
generate the appropriate signals, as well as the NI-FGEN function calls 
that you make to verify specifications.

You can verify the following specifications for the NI PXI-5422:

•

Oscillator frequency accuracy

•

DC gain and offset accuracy

The verification procedure for each of these specifications includes setting 
up, programming, and cleaning up.

If any of these tests fail immediately after you perform an external adjustment, verify 

that you have met the required test conditions before you return the NI PXI-5422 to NI for 
repair.

Refer to Table 2 for information about which instrument to use for 
verifying each specification. Refer to Figure 3 for the names and locations 
of the NI PXI-5422 front panel connectors.