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Spectrasys and Cascade P1dB Analysis Questions

Question asked by goborn on Jan 14, 2008
Latest reply on Jan 15, 2008 by rulonv
I'm not getting consistent P1dB predictions from Spectrasys for a simple cascade analysis.  It is depending upon source input power.

If I use the example file from Eagleware Spectrasys titled "System Input P1dB", I get the following results:
-50 dBm input gives IP1dB of -20.557 (default)
-70 dBm input gives IP1dB of -24.073 ???

In the standard interpretation, I don't believe P1dB should change as a function of input power.