In making FM transmitter distortion measurements, does anyone inject the
1 kHz audio signal into an FM transmitter by holding the microphone next
to a speaker? It would seem that neither speaker nor microphone would
produce enough distortion of a single frequency to affect the results,
and in any case, the microphone is part of the system being tested.

The idea would be to avoid having to fiddle with the variety of
microphone connectors out there.

I suppose I can and should compare the results of this technique with
applying the audio signal directly to the microphone input terminal.


Appreciate any thoughts. TIA.

Chuck
NT3G

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