NI PXIe-5693 Calibration Procedure
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© National Instruments
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17. Tune RF source 1 to tone 1 frequency.
18. Tune RF source 2 to tone 2 frequency.
19. Commit the NI 5693 settings to hardware.
20. Turn off the RF source 2 output power.
21. Adjust the RF source 1 power level to have a -10 dBm target tone power at the DUT input
connector using the following equation:
RF Source 1 = Target Tone Power + RF Source 1 through Splitter and Combiner Path Loss
22. Measure the channel A power using the appropriate calibration factor for the power sensor
frequency.
23. Calculate the RF input tone 1 power using the following equation:
RF Input Tone 1 Power
=
Channel A Power
+
Sensor/20 dB Attenuator/Splitter Tracking
Note
Use the Sensor/20 dB Attenuator/Splitter Tracking
characterization value at
the current RF source 1 frequency.
24. Turn off the RF source 1 output power.
25. Turn on the RF source 2 output power.
26. Adjust the RF source 2 power level to have a -10 dBm target tone power at the DUT input
connector using the following equation:
RF Source 2 = Target Tone Power + RF Source 2 through Splitter and Combiner Path Loss
27. Measure the channel A power using the appropriate calibration factor for the power sensor
frequency.
28. Calculate the RF input tone 2 power using the following equation:
RF Input Tone 2 Power
=
Channel A Power
+
Sensor/20 dB Attenuator/Splitter Tracking
Note
Use the Sensor/20 dB Attenuator/Splitter Tracking
characterization value at
the current RF source 2 frequency.
29. Continue adjusting the RF source 2 power level until the difference between RF input
tone 1 power and RF input tone 2 power is less than 0.1 dB.
30. Turn on the RF source 1 output power.
31. Determine the
Output Tone 1 Power
value by completing the following steps:
a.
Tune the spectrum analyzer center frequency to tone 1 frequency.
b.
Measure the spectrum analyzer peak amplitude. This value is the
Output Tone 1
Power.
32. Determine the
Output Tone 2 Power
value by completing the following steps:
a.
Tune the spectrum analyzer center frequency to tone 2 frequency.
b.
Measure the spectrum analyzer peak amplitude. This value is the
Output Tone 2
Power
.
