From: Kevin Dawson <kevind@esi.com.au>
To: Linux-hams List <linux-hams@vger.kernel.org>
Subject: Re: Which tone comes first?
Date: Mon, 12 Jun 2006 15:08:04 +1000 [thread overview]
Message-ID: <20060612050804.GC17169@glottis.kd> (raw)
In-Reply-To: <448C71EA.60007@sharon.esrac.ele.tue.nl>
On Sun, Jun 11, 2006 at 09:41:30PM +0200, Arno Verhoeven wrote:
> On 2006-06-11 21:30, Dave Platt wrote:
> >>I'm wondering which tone comes first when we start a sequence. Should it
> >>start with 1200 Hz or start with 2200 Hz? Or doesn't it make any
> >>difference?
> >
> >It really doesn't matter. Use whichever you wish, or switch
> >deterministically or randomly on each individual packet transmssion.
> >
> Thanks. That's what I thought. But I'm having some problems with a
> particular setup using a PIC to genrate the tones. I will have to play
> with it some more...
Some years ago, I had a project using a CML modem and found that it
needed a few transitions for bit sync. It didn't matter what was
sent - just the timing was needed. That may or may not be the problem
in your case, of course, but if you can arrange for it, it might help.
Kevin
prev parent reply other threads:[~2006-06-12 5:08 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-06-11 19:23 Which tone comes first? Arno Verhoeven
2006-06-11 19:30 ` Dave Platt
2006-06-11 19:41 ` Arno Verhoeven
2006-06-12 5:08 ` Kevin Dawson [this message]
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