Hi,
I believe the Icom D Star radios use a really old technology of reverse
sideband scrambling. There is nothing modern in those rigs.
Also some shortwave stations are broadcasting in digital format called DRM,
but it has not caught on. I think the BBC still broadcasts to North America
using DRM for 1 hour per day at 0100z or 2100EDT on 6.010MHZ. I've also
heard a German station on 3.995 in the evening using DRM.
73
Bob, [log in to unmask], K8LR
Skype Name: bobtinn
Life is GOOD!
----- Original Message -----
From: "Jeff Kenyon" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Friday, August 04, 2006 11:03 AM
Subject: Re: [BLIND-HAMS] Digital Voice
Hasn't there been some experiments with digital voice for short-wave
broadcasters? I thought I heard that there were, but it wasn't working
out that well.
On Fri, 4 Aug 2006, Frederick wrote:
> Hi
> I am not sure about the Icom radios you mentioned having digital voice
> or not. It would seem to me that a standardized digital voice mode would
> be
> a great enhancement for the HF spectrum.
> God bless,
> Mark WZ0K
> God loves you!
> My personal prayer book.
> Add your prayer or pray for others at the following link.
> http://prayerbook.homewithgod.com/cgi-bin/prayerbook/multi.pl?131961113534708:24:0
>
> http://lists.topica.com/lists/funhamradio.
> http://groups.google.com/group/funhamradio-list
>
> http://funhamradio.bloki.com
> ----- Original Message -----
> From: "Colin McDonald" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Friday, August 04, 2006 7:13 AM
> Subject: Re: Digital Voice
>
>
> > what about the D star radios from Icom? don't they do some sort of
> > digital
> > voice?
> > I know they do digital data, but i thought they also did some sort of
> > digital voice incription as well.
> >
> > only problem with doing digital voice on the amateur bands is that it
> > has
> > to
> > be a completely open source incription type that anyone could easily
> > decode
> > since if it weren't,it could be considered secret encoded messages,
> > which,
> > as far as i know, are illegal in the US as well without permission from
> > the
> > FCC?
> >
> > The canadian regulations, paraphrasing of course, make it illegal to use
> > any
> > kind of secret code to pass messages without express permission from the
> > government. Digital voice incription could potentially fall under that
> > category.
> > If someone was using say provoice or even apco 25 on a local simplex
> > frequency, it would be nearly impossible for me, or anyone else to know
> > what
> > they were saying since we wouldn't have the necessary codec to decode
> > their
> > transmission. The transmission would there for be in a "secret" code
> > and
> > against regulations.
> > Now,if a person offered the software or instructions on how to build a
> > decoder on a website, or in a popular monthly magazine, the idea of
> > secretive incoding would be no longer secretive since many people would
> > have
> > the means of decoding it.
> > just my view point anyway,i could be off the mark on this one, but i
> > have
> > pondered it for some time since our 52 group has tossed around the idea
> > of
> > digitalizing our transmissions.
> > 73
> > Colin, V A6BKX
> > ----- Original Message -----
> > From: "Jeff Kenyon" <[log in to unmask]>
> > To: <[log in to unmask]>
> > Sent: Friday, August 04, 2006 2:40 AM
> > Subject: Re: Digital Voice
> >
> >
> >> Hi, there is an external card for APCO-25 modulation for the Uniden
> >> BC259D
> >> scanner, but nothing I know of for the ham bands. There have been a
> >> few
> >> experiments though with APCO-25 useage on the ham bands though.
> >>
> >>
> >>
> >>
> >>
> >> On Thu, 3 Aug 2006, Frederick wrote:
> >>
> >> > Hi
> >> > I have been wondering for sometime if there are any digital voice
> >> > converters that a person could plug in to there older analog rigs. I
> > think
> >> > that transmitting and receiving in digital voice on the ham bands
> >> > would
> > be
> >> > the coolest thing.
> >> > God bless,
> >> > Mark WZ0K
> >> > God loves you!
> >> > My personal prayer book.
> >> > Add your prayer or pray for others at the following link.
> >> >
> > http://prayerbook.homewithgod.com/cgi-bin/prayerbook/multi.pl?131961113534708:24:0
> >> >
> >> > http://lists.topica.com/lists/funhamradio.
> >> > http://groups.google.com/group/funhamradio-list
> >> >
> >> > http://funhamradio.bloki.com
> >> >
> >>
> >
> >
>
|
