That is an easy problem to fix, simply make a low pass filter to roll off
everything above about 220 HZ.
------ Original Message ------
Received: Fri, 21 Apr 2006 08:20:49 PM CDT
From: "Bob M." <[EMAIL PROTECTED]>
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Two CTCSS Tones out of One TX
> You will likely end up with an audible sound by using
> two signals at the same time. Let's say you use 77.0
> Hz and 192.8 Hz. These are unrelated but you will
> still get the sum and difference frequencies coming
> out, which would give you around 115 Hz and 269 Hz.
> You might hear the one at 269. If you used two signals
> that were much closer, you could hear a slow beat
> note.
>
> Also, depending on the kind of decoders you use, they
> may not be happy seeing another sub-audible tone
> present along with the desired one.
>
> After saying this, I bet someone will come along and
> tell you that it will work, and how to do it!
>
> Bob M.
> ======
> --- Kevin & Natalia Mitchell <[EMAIL PROTECTED]>
> wrote:
>
> > Hi All,
> >
> > I am wanting to use one TX from our repeater site,
> > to link to two link RX's, these are on opposite
> > sides of the repeater.
> > I was thinking about having two different CTCSS
> > tones, one for each, and then having the TX generate
> > the two tones together. This way I can use one
> > freq., but still have some form of control over the
> > links by switching either, or both CTCSS tones
> > off/on as required.
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