NI PXIe-5694 Calibration Procedure
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© National Instruments
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37
Adjusting IF Flatness
Complete the following procedure to measure and adjust the IF flatness performance of the
NI 5694 IF conditioning module.
1.
Zero and calibrate the power sensors using the built-in functions in the power meter.
2.
Ensure that the hardware is properly configured as described in
3.
Run the self-calibration procedure of the NI 5622 digitizer.
4.
Initialize an external calibration session for the NI 5694.
5.
Initialize an IF response calibration step.
6.
Configure the NI 5694 as follows:
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Signal conditioning: Enabled
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Reference source: PXI_Clk
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IF conditioning downconversion: Disabled
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Step gain: Disabled
7.
Configure the RF source 1 generator as follows:
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Single frequency mode
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Frequency: 193.6 MHz
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Power level: -6 dBm
8.
Configure the power meter as follows:
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Channel 1: Power sensor A
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Trigger with settling delay
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Sensor setting %: 0.1
9.
Configure the digitizer as follows:
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Sampling rate: 585.9375 kS/s
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Number of samples to acquire: 40,960
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Reference source: PXI_Clk
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Reference Clock rate: 100 MHz
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DDC enabled: TRUE
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Data processing mode: Complex
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Frequency translation enabled: TRUE
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Dither enabled: TRUE
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Bandpass filter enabled: TRUE
