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NI PXIe-5693 Calibration Procedure
16. Measure the NI 5693 RF OUT power by reading the channel B power using the appropriate
calibration factor for the power sensor frequency.
17. Calculate the output power using the following equation:
Output Power = Channel B Power + Splitter and 6 dB Attenuator Path Loss
18. Calculate the gain using the following equation:
Gain = Output Power - Channel A power
19. Record the calculated
Gain
to the NI 5693 EEPROM.
20. Repeat steps 15 through 19 for each
RF Preselector Filter Path
listed in Table 18. For each
path, step through all the RF attenuation indexes.
21. Repeat steps 11 through 20 for all frequencies in
Appendix A: Test Frequencies for RF Gain
.
22. Close the calibration step for the NI 5693.
23. Close the calibration session for the NI 5693.
Adjusting Cal Tone Power Accuracy
Refer to
Appendix B: Test Frequencies for Cal Tone Amplitude Adjustment
for RF calibration
frequencies for this procedure.
1.
Connect the RF source 1 to the power splitter input using the SMA (m)-to-SMA (m) cable.
2.
Connect power sensor A to channel A on the power meter and to the reference output of the
power splitter.
3.
Connect the other output of the power splitter to the NI 5693 RF IN connector using the
SMA (m)-to-SMA (m) adapter.
4.
Connect power sensor B to channel B on the power meter and to the NI 5693 RF OUT
connector using the SMA (f)-to-SMA (m) semi-rigid cable and the 6 dB attenuator.
