NI PXIe-5653 Calibration Procedure
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© National Instruments
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8.
Repeat steps 6 through 7 until the
YIG Frequency Calibration Complete
parameter
returns a value of TRUE.
9.
Close the external calibration session. Store the results to the EEPROM on the device.
Adjusting LO1, LO2, and LO3 Output Power
Complete the following procedure to adjust the NI 5653 LO power performance using a power
meter. This adjustment yields a more accurate output power for the NI 5653 LO front panel
connectors.
1.
Connect the NI 5653 LO1 front panel connector to the power meter.
2.
Create a new external calibration session using the appropriate password.
3.
Create a new LO gain calibration session for LO1.
4.
Use the power meter to measure the LO1 output power at the frequency specified by the
Calibration Frequency
parameter.
5.
Adjust the LO Gain using the power measured in step 4 for the
Measured LO Power
parameter.
6.
Repeat steps 4 and 5 until the
LO Gain Calibration Complete
parameter returns a value
of TRUE.
7.
Close the external calibration session. Store the results to the EEPROM on the device.
8.
Disconnect the NI 5653 LO1 front panel connector from the power meter, and connect the
NI 5653 LO2 front panel connector to the power meter.
9.
Repeat steps 2 through 7 for LO2.
10. Disconnect the NI 5653 LO2 front panel connector from the power meter, and connect the
NI 5653 LO3 front panel connector to the power meter.
11. Repeat steps 2 through 7 for LO3.
EEPROM Update
When an adjustment procedure is completed, the NI 5653 internal calibration memory, stored in
the EEPROM, is immediately updated.
If you do not want to perform an adjustment, you can update the calibration date and onboard
calibration temperature without making any adjustments by performing an external calibration
in software.
Reverification
Complete the following sections to determine the as-left status of the device.
Note
If any test fails reverification after performing an adjustment, verify that you
have met the
before returning your device to NI. Refer to
for information about support resources or service requests.