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From: "James Moritz" <james.moritz@btopenworld.com>
To: <rsgb_lf_group@blacksheep.org>
References:  <BLU153-W31B99909FEEC02FEFADD59CFD40@phx.gbl>,<FB0329CF280D44A49EC2897B1A9E3FE4@TraceyPC>,<CAMFjj70usanHHipL7gS7uJ0R3ySBJBLaV9Sd75Eed6ksjaqOMA@mail.gmail.com>,<BF4A524700075746A6467658DFC7102CB0B489A43E@ICTS-S-EXC2-CA.luna.kuleuven.be> <BLU153-W59DE8EA44E005AF0CABE9ECFD40@phx.gbl>
In-Reply-To: <BLU153-W59DE8EA44E005AF0CABE9ECFD40@phx.gbl>
Date: Wed, 2 Nov 2011 22:58:29 -0000
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Subject: LF: Re: 8kHz of spectrum
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Dear LF Group,

Well, I think this is a positive development - the only minor disappointment 
is the reduction in maximum ERP to about 3W.

As for the choice of frequency, the maritime people have a plan for a sort 
of  "super Navtex" using OFDM modulation with a bandwidth of 10kHz centred 
on 500kHz. It may be that this is just a pipe dream, and/or a way to justify 
continued primary user status at 500kHz. But if it ever does come into 
existence, it will certainly be using vastly higher powers than amateur 
stations, and the noise sidebands will extend well beyond the actual signal 
bandwidth due to "spectral re-growth" in the TX PA. So it will be good to 
have a significant difference in frequency between ourselves and the noisy 
things. I expect all those REAL amateurs will manage to reduce their TX 
frequency by 5 percent somehow ;-)

Cheers, Jim Moritz
73 de M0BMU