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Re: [RTTY] RTTY Now trashy signals

To: rtty@contesting.com
Subject: Re: [RTTY] RTTY Now trashy signals
From: "Joe Subich, W4TV" <lists@subich.com>
Date: Tue, 08 Jan 2013 16:47:50 -0500
List-post: <rtty@contesting.com">mailto:rtty@contesting.com>

> Not all AFSK modems apply waveshaping to get rid of them either, so
> it is not just coming from FSK transmitters.

And far too many AFSK users run their sound cards "sliders up full"
into mic inputs that clip even before the mic gain control.  With
clipping in the mic input any wave shaping in the AFSK modem is lost.

All in all it's easier to generate a garbage signal with AFSK than
with a properly configured FSK transmitter even though the AFSK
signal may be marginally better if everything is optimum.

73,

   ... Joe, W4TV


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