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NI PXI-5663 Calibration Procedure
3.
Connect power sensor B to the other output of the power splitter through the 30 dB
attenuator. Figure 2 shows the completed equipment setup.
Figure 2.
RF Input Calibration (with Attenuator) Equipment Setup
4.
Measure the channel A and channel B power (using the appropriate frequency for the
power sensor) for all frequencies between 10 MHz and 7 GHz with the RF source power
set to 0 dBm.
Note
Use the log frequency progression: 10, 20, 30, ..., 100, 200, 300, ...,
1,000 MHz, and so on.
5.
Calculate the RF input attenuated calibration factor (dB) for each frequency using the
following equation:
RF Input Attenuated Calibration Factor
=
Channel B Power
-
Channel A Power
1
RF Source
2
Power Splitter
3
Power Sensor A
4
Power Meter
5
Power Meter Channel A
6
Power Meter Channel B
7
Power Sensor B
8
30 dB Attenuator
3
4
7
5
6
8
2
1