13. Connect the calibrator test head to the channel 2 input of the NI 5170R using the SMA
(m)-to-BNC (f) adapter and repeat steps 5 through 11, changing the value of the
channels
parameter from 1 to 2.
14. Connect the calibrator test head to the channel 3 input of the NI 5170R using the SMA
(m)-to-BNC (f) adapter and repeat steps 5 through 11, changing the value of the
channels
parameter from 2 to 3.
Note
If you are adjusting the NI 5170R (8CH), proceed to the following step.
If you are adjusting the NI 5170R (4CH), go to step 19.
15. Connect the calibrator test head to the channel 4 input of the NI 5170R using the SMA
(m)-to-BNC (f) adapter and repeat steps 5 through 11, changing the value of the
channels
parameter from 3 to 4.
16. Connect the calibrator test head to the channel 5 input of the NI 5170R using the SMA
(m)-to-BNC (f) adapter and repeat steps 5 through 11, changing the value of the
channels
parameter from 4 to 5.
17. Connect the calibrator test head to the channel 6 input of the NI 5170R using the SMA
(m)-to-BNC (f) adapter and repeat steps 5 through 11, changing the value of the
channels
parameter from 5 to 6.
18. Connect the calibrator test head to the channel 7 input of the NI 5170R using the SMA
(m)-to-BNC (f) adapter and repeat steps 5 through 11, changing the value of the
channels
parameter from 6 to 7.
19. Disable the calibrator output.
20. Call the niHSAI Close Ext Cal Session VI 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 EEPROM. 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 EEPROM.
Adjusting Timebase
Follow this procedure to adjust the internal timebase reference of the NI 5170R.
1.
Call the niHSAI Open Ext Cal Session VI to obtain an external calibration session.
2.
Connect the calibrator test head to channel 0 of the NI 5170R using the SMA (m)-to-
BNC (f) adapter.
3.
Configure the calibrator to a known state by outputting an 11 MHz, 0.9 V
pk-pk
sine wave.
4.
Enable the calibrator output.
5.
Call the niHSAI Timebase Cal Initialize VI with the following settings:
•
Channel
: 0
6.
Call the niHSAI Timebase Cal Configure VI to obtain the frequency to generate and
configure the calibrator to output a 0.9 V
pk-pk
sine wave at the specified frequency.
7.
Wait 1 second for settling.
22
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NI PXIe-5170R Calibration Procedure
