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Phase Matrix PXI-1420 MW Downconverter Module
Quick Start Guide
5
Using the Soft Front Panel of the PXI-1420, adjust the system IF
Attenuation until the signal from the IF A OUT (as indicated on the
Spectrum Analyzer) has reached -2 dBm; this power level is
equivalent to +38 dB of gain through the PXI-1420.
6
Set the Spectrum Analyzer to Max Hold.
7
Sweep the Signal Generator RF frequency from 10 GHz to
10.5 GHz, keeping the output level constant.
8
Confirm that the maximum fluctuation, at the IF A OUT connector,
between 75-425 MHz is less than or equal to 3 dB.
N O T E
System gain is a combination of the settings for IF ATTEN 1 and IF ATTEN 2.
Using both attenuators will result in better system performance. For optimum
performance, the factory recommends that when adjusting the IF attenuators of the
PXI-1420, the adjustment should be made so that no part of the IF chain is overloaded.
To prevent overloading during an adjustment, first adjust IF ATTEN 2 from 0 to 20 dB,
and then adjust IF ATTEN 1 until reaching the desired attenuation.