Rod Davis <km6sn@...>
Some time ago I was curious about the quality of
embedded sound cards in my old
I simply used audio-to-audio connections, with no intervening TX and RX.
I was stunned to see that IP3 was in the -80 dB
region! I was impressed
That means it is possible to get a coarse IP3
measurement on a uBITX
The measurement would certainly be good enough to
give IP3 indications
Be careful not to overload the aux receiver, and turn off the AGC.
Another possibility is to use an audio spectrum
analyzer program on the receiving
Free test equipment!