From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andrew Errington <a.errington@lancaster.ac.uk>
Subject: Re: 300bps Packet
Date: Wed, 24 Nov 2010 20:22:08 +0900
Message-ID: <201011242022.08391.a.errington@lancaster.ac.uk>
References: <4CEB5074.2070008@complete.org> <4CEC16EF.8060106@radagast.org> <BD133160888F43CA9735B652903C2FF1@LIVINGROOM>
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To: Tsutsumi Family <oakie@kamakuranet.ne.jp>
Cc: 'Dave Platt' <dplatt@radagast.org>, linux-hams@vger.kernel.org

On Wed, 24 Nov 2010 19:31:25 you wrote:
> Dave,
>
> Thank you for providing the tutorial of SM source codes.
>
> As one of ways to solve 300bps SSB operation without any code change, you
> are suggesting to use the frequency setting of f0 and f1 to less than 4 x
> 300bps =1,200 Hz such as 800Hz and 1,000Hz, not conventional 2,100Hz and
> 2,300Hz.
>
> Correct?
>
> Regards,
>
> take

Hi,

There are no 'conventional' tones for HF modems.  Here's a site that gives a 
good explanation why:
http://wa8lmf.net/aprs/SSB_Frequencies.htm

Here are two websites listing commonly found tone frequencies:
http://vk3.aprs.net.au/aprs_on_hf.htm
http://www.aprs.net.au/hf/hf-modem-tones

HTH,

73,

Andrew
HL5/ZL3AME