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PXIe-5665 Calibration Procedure
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© National Instruments
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4.
Disable the RF source 1 output, and enable the RF source 2 output.
Note
When disabled, the RF source 1 output signal should be less than -60 dBm.
5.
Measure the channel B power using the appropriate sensor calibration factor for the
RF source 2 frequency.
6.
Repeat step 5, adjusting the RF source 2 power until the channel B reading is within
±0.1 dB of the power in Table 7. The RF source 2 power is the
RF Source 2 Programmed
Power
.
7.
Disable the RF source 2 output, and enable the RF source 1 output.
Note
When disabled, the RF source 2 output signal should be less than -60 dBm.
8.
Measure the channel B power using the appropriate sensor calibration factor for the
RF source 1 frequency.
9.
Repeat step 8, adjusting the RF source 1 power until the channel B power is within ±0.1 dB
of the power in Table 7. The RF source 1 power is the
RF Source 1 Programmed Power
.
10. Repeat steps 3 to 9 for all remaining frequency and power values listed in Table 7.
Characterizing RF Source Power (Through Splitter)
Note
Prior to starting this procedure, zero and calibrate the power sensor and define
the power splitter reference output using the procedures in the
Characterizing Power Splitter Reference Output
sections of this document.
1.
Connect the RF source 2 output to the power splitter input through the SMA (m)-to-
SMA (m) cable.
2.
Connect a 50
Ω
termination load to the reference output of the power splitter.