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 distance
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
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,
Don't forget Tetra, which is huge in Europe...
73 de Darren
G7LWT
On 7 April 2010 13:11, Doug Bade k...@thebades.net 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
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?
As
, 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 k...@thebades. mailto:k...@thebades.net
net wrote
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
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 the USA
[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:
Yes,
Tetra
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 it
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 full
On Apr 4, 2010, at 2:30 PM, John wrote:
--- In Repeater-Builder@yahoogroups.com, Nate Duehr n...@... 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 header
, 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.com
yahoogroups.com, Nate Duehr n...@... wrote:
I like D-STAR
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 very good points and some pretty amusing ones
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
-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@yahoogroups.com
mailto:Repeater-Builder%40yahoogroups.com, Nate Duehr n...@... wrote:
I like D-STAR
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
: 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 5:10 AM
Subject: RE: [Repeater-Builder] Re: D-Star (Protocol
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
-Builder%40yahoogroups.com]
*On Behalf Of *Nate Duehr
*Sent:* Monday, April 05, 2010 4:01 AM
*To:* Repeater-Builder@yahoogroups.comRepeater-Builder%40yahoogroups.com
*Subject:* Re: [Repeater-Builder] Re: D-Star (Protocol and Repeaters)
On Apr 4, 2010, at 2:30 PM, John wrote
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-Star
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 at
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