11. 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-N (f) adapter and power sensor assembly from CH 0
and connect the assembly to CH 1 of the PXIe-5423.
c)
Repeat steps 4 through 10.
Adjusting the PXIe-5423
Follow this procedure to adjust the PXIe-5423 to meet published specifications.
Note
All adjustments must be completed in the same external calibration session.
1.
Call niFgen ni5433 Open Ext Cal Session to obtain an external calibration session.
2.
procedure.
3.
procedure.
4.
procedure.
5.
Call niFgen ni5433 Close Ext Cal Session with the following settings:
•
Action
: If the external adjustment procedure completed without any errors, set this
control to Commit to store the new calibration constants, adjustment time,
adjustment date, and adjustment temperature to the onboard memory. If any errors
occurred during the external adjustment procedure, or if you want to abort the
operation, set the control to Abort to discard the new calibration constants without
changing any of the calibration data stored in the onboard memory.
Self-calibrate the PXIe-5423 after completing adjustment and before reverification.
Related Information
on page 5
Adjusting Timebase
Follow this procedure to adjust the internal timebase reference (TCXO) of the PXIe-5423.
1.
Connect one end of the SMA (m)-to-SMA (m) cable to a channel of the PXIe-5423 and
the other end to a channel of the oscilloscope.
Note
Timebase adjustment can be performed on either channel of the two-
channel PXIe-5423.
2.
Lock the oscilloscope to the precision frequency reference using the PXI Clock.
3.
Configure the oscilloscope with the following settings:
•
Vertical range
: 5 V
pk-pk
•
Sample rate
: 250 MS/s
14
|
ni.com
|
PXIe-5423 Calibration Procedure
