Re: 10Mbit @ 10GHZ (was linux soundmodem over 9600 baud ?)

[Richard Stearn]

> 
> On Wed, Dec 01, 1999 at 10:15:24PM +0000, Richard Stearn wrote:
> > My reading of the UK Licence conditions is that a digital station must id
> > once every 15 mins in morse at no more than 20 wpm. That is not going to do
> > the bit error rate much good! This issue will need to be resolved country by
> > country.
> 
> Perhaps the ID could be just outside of the bandwidth of the actual
> signal. The MT63 (a recent digital mode) developers are now talking
> about adding a semi-continuous CW ID running just 100 Hz or less outside of
> the actual information bandwidth (which is 500, 1000 or 2000 Hz). 

Given that the spectrum 10 M bit/sec manchester encoded data and clock
(assuming a sinusoidal transition (all right raised cosine)i) is 5MHz
to 10MHz (approximately) in the simple modulation system we have 0Hz to
5MHz to implement CW ID, hadn't thought of that.

-- 
Regards
        Richard
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Amateur radio callsign: G1SOG         Home BBS: G1SOG@GB7SDN.#49.GBR.EU
                Amprnet co-ordinator for Wiltshire
My opinions are mine, all mine. None to spare for unopinionated masses.
This message comes from a WinTel free zone.   CPU = Cyrix,  OS = Linux.
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