[MRCG] Reception 2

[Tim]

Yep, True dat...

I have been looking for the "system specification" for the CV-2455 on its
AFSK tone +/- frequency accuracy.  It is just L-C circuitry.  This would
also describe the shift "distance" as well.  But so far, I can't find
anything.  As a contemporary system with the GRC-26 for example, I would
expect them to be comparable.  So I don't know how far "off" from the
advertised mark and space tones they can be before garble appears.  This
system spec should also add in the transmitter "carrier" frequency +/- as
well.  So much to learn.....

On Mon, Nov 3, 2014 at 4:48 PM, Mark J. Blair <nf6x at nf6x.net> wrote:

>
> > On Nov 3, 2014, at 10:10 , Tim <timsamm at gmail.com> wrote:
> >
> > Mark reported that my transmitter was
> > about 40 cps "off", close enough for a ship this size!
>
> As I recall, it was only a few Hz off! The only drawback of good frequency
> discipline is that doubles tend to take out both stations. When we get
> doubles with one of the stations 75-100 Hz off, fldigi can easily pick out
> either one! I don't expect my other rigs to be so selective though. Or even
> if they are, tuning them probably won't be as easy as clicking on the
> desired signal on a waterfall display. But it'll be so much more cool if
> moving parts are involved.
>
> --
> Mark J. Blair, NF6X <nf6x at nf6x.net>
> http://www.nf6x.net/
>
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