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VE2HAR > MT63 10.03.05 04:06l 243 Lines 6411 Bytes #-7498 (0) @ WW
BID : 59303SENTTO
Read: GUEST
Subj: Re: [MT63] 20 kHz wide Digital Proposal (Was: ARRL MUST GET
Path: DB0FHN<DB0FOR<DB0MRW<OK0PPL<DB0RES<ON0AR<VA2HAR<VE2HAR
Sent: 050310/0141z @:VE2HAR.#MTL.QC.CAN.NOAM Laval #:40908 $:59303sentto
Oh God! Don't start a no-code/know-code argument, please!
Steve/WM5Z
Larry Levesque wrote:
> Yes, but imagine 10 people tring to use this mode at once on one
> band. Not
> enough band left for anyone else. If you can specify one channel, I'd
> say
> thow it in the cw allocation!
>
> ----- Original Message -----
> From: <dubose@texas.net>
> To: <bcarling@cfl.rr.com>
> Cc: <cw@mailman.qth.net>; <DCBOATANCHORS@topica.com>;
> <flboatanchors@yahoogroups.com>; <hamradioam@topica.com>;
> <MOPAGROUP@yahoogroups.com>; <MT63@yahoogroups.com>; <linlink@wetnet.net>
> Sent: Wednesday, March 09, 2005 11:35 AM
> Subject: Re: [MT63] 20 kHz wide Digital Proposal (Was: ARRL MUST GET
> BETTER)
>
>
> >
> > Brian,
> >
> > Well yes and no. What the HSMM is suggesting is that you allow up
> to 20
> > KHz
> > signals. But we're taking about 56KBPs throughput that would allow
> one or
> > more voice channels actually multi-mode all on one signal.
> >
> > You might see 56KBPs data but it would only be on-the-air for a short
> > time.
> > The "channel" would be shared.
> >
> > Right now we have MT63 at 200 WPM thoughput on a 2 KHz wide bandpass at
> > a -5
> > dB SNR on a poor CCIR channel. But we really need to push 800-1200
> WPM at
> > the
> > same signal level. I don't see doing that with less than a 6 KHz
> channel
> > even
> > exploiting some of the new OFDM type modulation protocols being
> developed.
> >
> > How many CW QSOs running at 20 WPM will it take to produce 1200 WPM
> error
> > free
> > copy at a signal level that MT63 can copy? These are signal levels
> that
> > even
> > the best CW operator can't copy a signal at. So the answer is that NO
> > number
> > of CW QSOs can produce the throughput of 1200 BPS, near error free, at
> > a -5 dB
> > SNR on a poor CCIR channel.
> >
> > All this IS possible if we are willing to step out of the box.
> >
> > AND the new modes that will develop will be FAR SUPERIOR to Pactor
> III or
> > anything being done today on HF.
> >
> > We're also looking at doing much of this work using a computer sound
> card
> > so
> > separate controller hardware is not needed.
> >
> > 73,
> >
> > Walt DuBose/K5YFW
> > Asst Chairman
> > ARRL HSMM WG
> >
> >
> > Quoting Brian Carling <bcarling@cfl.rr.com>:
> >>
> >> On 8 Mar 2005 at 19:11, David J. Ring, Jr. wrote:
> >>
> >> > I don't think the digital signals they want are 20 kHz wide!
> >>
> >> Want to bet on that?
> >>
> >> There IS in fact a proposal out now for a digiotal mode that IS 20
> >> kHz wide for high speed data transefer on HF ham bands.
> >> (as if Cra... er, I mean Pactor is not jamming the HF bands enough
> >> already!)
> >>
> >> Here it is:
> >>
> >> On Janauary 19, 2005, John Champa, K8OCL,ARRL Chairman, High Speed
> >> Multimedia Networks Working Group, issued the Technology Task
> >> Force report to the ARRL Board of Directors, which includes the
> >> following:
> >>
> >> "At a minimum, 20 kHz wide emissions should be allowed in the
> >> following segments:
> >>
> >> 3.58 - 3.725 MHz
> >> 7.035 - 7.125 MHz
> >> 14.065 - 14.15 MHz
> >> 21.08 - 21.2 MHz
> >> 29 - 29.7 MHz"
> >>
> >> Obviously, a *single* HSMM transmission, 20 KHz wide, could
> >> totally wipe out all PSK31, MFSK16, RTTY, and many CW and DX
> >> operations on 80m, 40m, and 20m, where they are now used
> >> worldwide. Dozens of CW QSOS could be obliterated within
> >> one 20 kHz swath. NOT a good idea at all!
> >>
> >> We have never seen such a lack of concern and compassion for the
> >> majority of radio amateur activities as evidenced by the ARRL
> >> Committee on HSMM and ARRL support for Winlink's attempted
> >> domination of the HF frequencies, in both cases, to sacrifice the
> >> hobby on HF for everyone else in order to favor a
> >> very small special interest group.
> >>
> >> I can only hope that they really are coming to their senses at the
> >> top level of leadership, but this is cause for alarm.
> >> JIm Haynie says that they are going to have a new band plan by
> >> July.
> >> I hope it is a workable one that averyone can live with.
> >> The Winlink/Pactor mess will hopefully get reined in by this.
> >>
> >> OK back to some fun CW contacts now, and a little less grumbling!
> >>
> >> 73 de AF4K
> >>
> >>
> >>
> >>
> >> << Try MT63 on 80m - great fun!>>
> >>
> >> - The MT63 Reflector -
> >> MT63@egroups.com
> >>
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> >>
> >>
> >>
> >>
> >>
> >>
> >
> >
> >
> >
> >
> >
> >
> > << Try MT63 on 80m - great fun!>>
> >
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> >
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> >
> >
> >
> >
> >
> >
> >
>
>
>
>
> << Try MT63 on 80m - great fun!>>
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