I should note that want I really want to do is automate this measurement and
generate a series of curves that show TX_gain setting vs. intermod, for
several frequencies, at -3 dB from full scale.  The state of GPIB support
under Linux doesn't seem to be that great though.

I suppose though that you can loop-back the TX to RX via attenuator, and
offset tune the RX.  This assume the RX linearity is much better than TX.

Lou
KD4HSO




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