[GreenKeys] Autostart freq for 170 shift RTTY

Harold Hallikainen harold at mai.hallikainen.org
Wed Dec 30 16:50:27 EST 2020


OK, I did not even think of specifying center frequency! One more to the
collection!

I have 10 Hz resolution. Is 100 Hz likely to be the lowest resolution? If
so, perhaps we should

> Whatever you choose is OK, but some of us have ONLY 100Hz resolution on
> the
> FSK center freq. I can do 14,083,800+/-85 Hz but I cannot set an arbitrary
> freq.  IF the AFSK suppressed carrier freq is on an even kHz, then I will
> be within 10 Hz since the FSK freq is 2210+/-85 from there, or for
> "14086",
> then the ham FSK freq is 14083,790+/-85 Hz.
> If you make the mark frequency on an even kHz, then 15Hz is as close as I
> can come. You choose, but please be prepared for some of us to be "off
> frequency".
>
> Those of us running 850 shift with military gear know that our FSK center
> freq has to be on 1 kHz boundaries because some gear doesn't even do 100Hz
> steps..
>
> I am sure that hams, the military, and commercial outfits could have made
> the situation even worse, but it sure seems like they were trying really
> hard.......oh yeah, don't forget to toss in mark high vs mark low....
>
> Cheers,
> Nick
> Nick England K4NYW
> www.navy-radio.com
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