Just a FIY: Flex radios allow easy adjustment of the tx bandpass. I
routinely use a narrow tx bandpass with AFSK just to avoid problems
such as Joe describes below. It is a click/drag adjustment, with
visual feedback on the bandpass adjustments.
Jerry W4UK
At 05:03 PM 2/6/2012, Joe Subich, W4TV wrote:
> > Someone sent me this comment when the subject of FSK readouts came up.
> > Any thoughts on his plan?
>
>The only problem with using 915/1015 (1 KHz) or any other "low" audio
>tones with AFSK is the chance that over driving the microphone input
>of the transceiver will produce harmonics that will get transmitted.
>The problem is particularly a problem with tones 1 KHz and below since
>the 3 KHz harmonic content *will* make it through the IF filter in most
>rigs. 3 KHz is right on the "knee" of the response of most modern
>rigs.
>
>73,
>
> ... Joe, W4TV
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