On Sun, Jul 27, 2008 at 4:10 PM, Lee A Crocker <[EMAIL PROTECTED]>wrote:

> Why a subcarrier?   just make it the contest exchange


Two reasons:

(1) So it can be decoded automatically by a simple demod, rather than (say)
an open-speaker-set voice transcription, by a program sucking in all
available signals in the passband

(2) So you only need to capture a partial transmission to get all the info
-- say 80 bits at 300bps -> a little more then 1/4 second, repeatedly. out
of any transmitted segment.

The method is a little stickier when CW is involved :-)

73
Frank
AB2KT

-- 
Travelling by airplane in the US is nothing more than mass training of
Americans to the requirements of the coming police state. The whole point is
to make you learn to acquiesce without question, en masse, to completely
absurd directives by dull functionaries wearing uniforms. -- Digby
_______________________________________________
FlexRadio Systems Mailing List
FlexRadio@flex-radio.biz
http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz
Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/
Knowledge Base: http://kb.flex-radio.com/  Homepage: http://www.flex-radio.com/

Reply via email to