Rigbht, this user I am talking about is an SMR who is using 220-222 MHz,
and this is just before our 1.25 meter band, which for the most part is
pretty dead here. This system is using some kind of SSB, and it has a
tone in the background. I can't remember if it is ESSB, but it may be
something else. The type of trunked system that is in use and is using
this format is known as an MPT-1327 system in case anyone was wondering,
and this is much different from the other types of systems out there, and
is used in Europe and other places, but there are some systems in the
states here as well that are like this.
On Mon, 2 May 2005, Colin McDonald wrote:
> on 220 they might have some sort of CTCSS or pl tone in there.
> There should be absolutely no tone or noise behind the audio for this
> ESSB...the whole idea is for clearity and reducing all noise or background
> noise
> They do not use a tone, if there is a tone, it comes from the recording
> device or the playback device that is being used.
> A tone is not necesary on ssb for anything.
> I didn't hear a tone in the audio at all...now that i have actually checked
> out Nu9n's site again i realize that it wasn't wide band essb that i was
> hearing because i can hear 6KHZ wide usually without a problem...so this was
> something different, could have been someone having difficulties with their
> audio.
> 73
> Colin, V A6BKX
> ----- Original Message -----
> From: "Jeff Kenyon" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Monday, May 02, 2005 10:19 PM
> Subject: Re: did anyone catch the demonstration on Coast to Coast AM last
> night on ESSB?
>
>
> > Hi Collin and the group. I don't know where they are experimenting with
> > this, but part of Art Bell's point was the fact that he wanted the ability
> > of hams to experiment more and to have the freedom to experiment more on
> > the ham bands, and I was impressed with the demonstration. Did you by
> > chance hear a tone in the back ground of whatever it was you were hearing?
> > As I posted earlier there are some users on 220 MHz who I think that are
> > using ESSB, and though it is quite readable there is that tone in the
> > background.
> >
> >
> >
> >
> >
> > On Mon, 2 May 2005, Colin McDonald wrote:
> >
> > > perhaps that was what i was hearing earlier tonight on 14.301 sounded
> like
> > > some crazy sounding audio with extremely wide range and great quality,
> just
> > > couldn't understand it with the 2.4KHZ filter.
> > > 73
> > > Colin, V A6BKX
> > > ----- Original Message -----
> > > From: "Anthony Vece" <[log in to unmask]>
> > > To: <[log in to unmask]>
> > > Sent: Monday, May 02, 2005 2:59 PM
> > > Subject: Re: did anyone catch the demonstration on Coast to Coast AM
> last
> > > night on ESSB?
> > >
> > >
> > > > I caught it also and, let me tell you, the difference was astounding.
> > > >
> > > > 73 De Anthony W2AJV
> > > > [log in to unmask]
> > > > ECHOLINK NODE NUMBER: 74389
> > > >
> > > >
> > > > ----- Original Message -----
> > > > From: "Jeff Kenyon" <[log in to unmask]>
> > > > To: <[log in to unmask]>
> > > > Sent: Monday, May 02, 2005 1:06 PM
> > > > Subject: did anyone catch the demonstration on Coast to Coast AM last
> > > night
> > > > on ESSB?
> > > >
> > > >
> > > > > Hi folks, I was just wondering if anyone managed to catch the ESSB
> > > verses
> > > > > just regular old SSB on Coast to Coast AM last night? I caught it
> and
> > > was
> > > > > impressed.
> > > > >
> > > > >
> > > > > --
> > > > > No virus found in this incoming message.
> > > > > Checked by AVG Anti-Virus.
> > > > > Version: 7.0.308 / Virus Database: 266.11.1 - Release Date: 5/2/2005
> > > > >
> > > > >
> > > >
> > >
> >
>
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