On 4/7/2010 3:34 PM, k7...@skybeam.com wrote:
> Yep, were all aware of the issues here in the USA. On my commercial TDMA
> system I did a test 75miles away from the site with a portable and get back
> into the site with no problem. Way out of the FCC license but works great.
>
>
>
> Mike
I guess
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of wd8chl
Sent: Wednesday, April 07, 2010 12:57 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Re: D-Star (Protocol and Repeaters)
On 4/7/2010 11:47 AM, k7...@skybeam. <mailto:k7pfj%40skybeam.com> com wrote:
On 4/7/2010 11:47 AM, k7...@skybeam.com wrote:
> Yes,
>
>
>
> Tetra 4 slot TDMA over a 25Khz channel, Phase 1 P25 12.5Khz digital over a
> single channel, NXDN Kenwood& Icom FDMA 6.25 KHz digital and DMR standard
> is TDMA digital over a 12.5khz channel witch is 6.25Khz. I wish Tetra was
> here in
On 4/7/2010 11:22 AM, Nate Duehr wrote:
> Yep all understood. My point was, I haven't seen any of those
> DEPLOYED in a Public Safety environment yet, so I doubt his posting
> was accurate about whatever system he's talking about being TDMA...
> It's probably something else... P25 phase I, most l
Sent: Wednesday, April 07, 2010 8:49 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Re: D-Star (Protocol and Repeaters)
Don't forget Tetra, which is huge in Europe...
73 de Darren
G7LWT
On 7 April 2010 13:11, Doug Bade mailto:k...@thebades.net>
net> wrote:
On Apr 7, 2010, at 8:07 AM, wd8chl wrote:
> On 4/7/2010 2:28 AM, Nate Duehr wrote:
>
> > It almost sounds like you're talking about a trunked (multi-site)
> > system though, and I don't know of any trunked TDMA-based commercial
> > offerings in the 2-way radio market. Anyone else heard of one?
>
Don't forget Tetra, which is huge in Europe...
73 de Darren
G7LWT
On 7 April 2010 13:11, Doug Bade wrote:
>
>
> There are several. Harris- OpenSky, P25 Phase 2 are currently being
> deployed, and Iden ( Nextel ) Motorola has a version for municipals. I do
> not know if anyone ever built it but
On 4/7/2010 2:28 AM, Nate Duehr wrote:
> It almost sounds like you're talking about a trunked (multi-site)
> system though, and I don't know of any trunked TDMA-based commercial
> offerings in the 2-way radio market. Anyone else heard of one?
As Doug said, Harris (formerly M/A-Com) has Open Sky
There are several. Harris- OpenSky, P25 Phase 2 are currently being
deployed, and Iden ( Nextel ) Motorola has a version for municipals. I do
not know if anyone ever built it but I saw it on proposals a few years back.
It almost sounds like you're talking about a trunked (multi-site) system
th
On Apr 6, 2010, at 8:45 PM, vr2 xvd wrote:
> Syetem Planed <1,xxx sites for "full" out door coverage .
> As the result it is double the site.
> They tried to increase the R.F power output.
> The field strength increase ,but only a bit change.
> It is because the TDMA format time slot overlap by d
Dear sirs,
Thank very much for the information.
Yes, it is difficult to say which one will better than other.
For me/my team we get intend to know more on it before start the project.
I heard a story that some where police digital radio system use TDMA
format.
Syetem Planed <1,xxx sites for "ful
On Apr 5, 2010, at 7:01 PM, vr2 xvd wrote:
> hi all,
>
>
> May I ask the follow question.
> For a single site Voice communication digital repeater operation in identical
> conditions, which format /system type will work better in multi path signal
> ,with lager coverage area.
> FDMA,TDMA (D-
busy trying
> > to talk people out of it in favor of P25 or old fashioned analog.
> >
> > Just my 2 cents. I'll go back to my corner now.
> >
> > John N3SPW
> >
> > ----------
> > *From:* Repeat
Both GMSK modem and DMK URI provide a shaped and limited waveform
that can be directly FM'ed at what is easily set to 1.8khz +/-
typical... ( this is what the Icom stations use) the waveform is cleaner
out of my station than the Icom D-Star radio keying it and filtering is
better out of t
my
headphones for 8 hours at a Red Cross shelter. (Disclaimer: I also still prefer
a good AM signal to SSB, and good vinyl audio recordings to 32K MP3s. ;^)
73,
Paul, AE4KR
- Original Message -
From: John Szwarc
To: Repeater-Builder@yahoogroups.com
Sent: Monday, April 05, 2010 5:
On 4/5/2010 5:10 AM, John Szwarc wrote:
Okay. I've been reading with some interest the threads on D-STAR.
There have been some very good points and some pretty amusing ones.
P25 sounds interesting, but you will have to take note of the fact
that it has not been widely accepted by the ham c
---
> *From:* Repeater-Builder@yahoogroups.com
> [mailto:repeater-buil...@yahoogroups.com] *On Behalf Of *Nate Duehr
> *Sent:* Monday, April 05, 2010 4:01 AM
> *To:* Repeater-Builder@yahoogroups.com
> *Subject:* Re: [Repeater-Builder] Re: D-Star (Protocol and Repeaters)
>
> Anyone who is currently building analog AllStar Link
> repeaters using a DMK URI already has the parts for a D-Star
> repeater .. assuming your TX and RX will handle GMSK data of
> your repeater.. This includes many Mastr II stations which
> seem to be a large portion of the amateur repeater
epeater-buil...@yahoogroups.com] On Behalf Of John Szwarc
Sent: Monday, April 05, 2010 7:11 AM
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Re: D-Star (Protocol and Repeaters)
Okay. I've been reading with some interest the threads on D-STAR. There
have been some
om] On Behalf Of Nate Duehr
Sent: Monday, April 05, 2010 4:01 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Re: D-Star (Protocol and Repeaters)
On Apr 4, 2010, at 2:30 PM, John wrote:
>
>
> --- In Repeater-Builder@ <mailto:Repeater-Builder%40yahoogroups
On Apr 4, 2010, at 2:30 PM, John wrote:
>
>
> --- In Repeater-Builder@yahoogroups.com, Nate Duehr wrote:
> >
> >
> > I like D-STAR as a not-very-well-designed "first try" and use it... but
> > it's seriously technologically flawed. Some of that can be fixed... other
> > things like the heade
Threaded...
John wrote:
>
> Hmmm... I'm sitting here with my NQMHS Node Adapter (GMSK Modem) and watching
> the binary stream, in both Hex and Char, off of my IC-91AD, while
> transmitting for a few seconds. It seems the callsign information is
> repeated on a pretty continuous basis looking
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