That's pretty much what I figured as well, but maybe
the tolerance isn't as tight as the freqs are spec'd
to. They could have done that to throw us off. PL
tones can be off by close to one cycle and still work
properly, but they're spaced apart by 3-4 cycles, so
I'd say the tolerance on those is likely +/- 1-2 Hz.
Similar logic on the paging tones would show they're
spaced 30-60 Hz apart, so the tolerance might still be
0.5-1% or so, which would be easier to deal with than
under 0.1%. As long as the tones aren't harmonically
related, even with the tolerance at one end.
Just my $0.02 worth.
Bob M.
======
--- Eric Lemmon <[EMAIL PROTECTED]> wrote:
> Bob,
>
> Well, I guess the Rosetta Stone document is not as
> valuable as I had
> hoped. I went through it carefully, but found no
> statement of tone
> tolerance. However, I can infer from the printed
> frequencies- which are
> specified to 1/10 Hz- that the tolerance is +/- 0.1
> Hz or better. That
> jibes with your assumption of well under one
> percent.
>
> 73, Eric Lemmon WB6FLY
>
> "Bob M." wrote:
>
> > I think all we wanted to find out was the
> frequency tolerance. Is that
> > in the document? The general consensus seemed to
> be well under 1
> > percent, just based on the odd frequencies in use.
> >
> > Bob M.
> > ======
> > --- Eric Lemmon <[EMAIL PROTECTED]> wrote:
> >
> > > A week ago, there was an exchange of postings
> > > regarding the
> > > specifications of the two-tone sequential paging
> > > format. After some
> > > searching of my Motorola archives, I found a
> > > document which I believe is
> > > the "Rosetta Stone" we seek.
> > >
> > > It is Motorola Publication 6881103C80, entitled
> > > "Two-Tone Sequential
> > > Tone Coding." This seven-page document includes
> the
> > > timing and
> > > deviation specifications, along with charts
> listing
> > > the various code
> > > plans. It costs about $3 from Motorola Parts.
> > >
> > > 73, Eric Lemmon WB6FLY
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