The repeater is just the mobile modified to be a repeater. It's the same
radio. Not an overly bad radio though I've never used one in person, I have
played with the hand held since a friend of mine has one, but I see as much
future in it as wires had, absolutely none. One of my clubs has Icom's
IDAS/NXDN and I have a radio for that, just the hand held though. That's
useable anyway, but I think in 10 years I'll be using that radio on analog,
which is about all I use it on now actually. At least I have the latest
version radio so some club members are jealous since they have the old
model.
----- Original Message -----
From: "Buddy Brannan" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Wednesday, March 04, 2015 10:41 AM
Subject: Re: DMR radio
> Yeah=E2=80=A6but isn=E2=80=99t the mobile touch screen? The repeater is, =
> if memory serves.
>
>
> =E2=80=94=20
> Buddy Brannan, KB5ELV - Erie, PA
> Phone: 814-860-3194=20
> Mobile: 814-431-0962
> Email: [log in to unmask]
>
>
>
>> On Mar 4, 2015, at 10:21 AM, Bob Tinney <[log in to unmask]> wrote:
>>=20
>> Hi,
>>=20
>> Our local repeater club just ordered the new Yaesu System Fusion
>> DR1-X=20=
>
>> repeater. The mobile Yaesu rig that will do C4FM digital is the=20
>> FTM400DR and a voice board is available for that model. It will=20
>> announce your call when you turn it on and will also tell you the=20
>> frequency your tuned to, but it will not tell you much else. C4FM=20
>> sounds much better than DStar. I don't know how it compares to DMR, =
> but=20
>> anything is better than DStar.
>>=20
>> Bob, K8LR, [log in to unmask]
>>=20
>> On 3/4/2015 8:57 AM, Martin G. McCormick wrote:
>>> Our club had a really good presentation in February by a
>>> couple of members about DMR which is also known in the US as
>>> MotoTRBO pronounced MotoTurbo. I strongly suspect it is the new
>>> and neat thing in amateur radio but it has a lot of growing up
>>> to do yet.
>>>=20
>>> Look it up in a Google search and there is a lot of
>>> information.
>>>=20
>>> DMR is an open-source standard which means anybody can
>>> make the gear unlike DSTAR so we will probably eventually see
>>> many models.
>>>=20
>>> Here's the good and the bad.
>>>=20
>>> The best hand-held right now is sold by a company in the
>>> United States called Connect Systems. I don't know if that's one
>>> or two words. The radios are made in China but to commercial
>>> specifications and sell for around $300 a piece to business and
>>> public safety agencies. Connect Systems gives hams a really good
>>> price break. The guys who gave the presentation say the radios
>>> are good and solid like a Motorola. They are UHF only and will
>>> do analog FM as well as DMR. I'd love to have one, myself, but
>>> read on 'cause here comes the bad news.
>>>=20
>>> It's your typical screen toy. There are no voice
>>> prompts, no helpful beeps except for one that tells you if you
>>> are trying to transmit on an occupied channel, absolutely
>>> nothing that makes the radio accessible. There's just a nice
>>> strip of glass across the front.
>>>=20
>>> The programming software is all Windows, all the time,
>>> your typical bundle of lost opportunity.
>>>=20
>>> Briefly, here is how DMR works.
>>>=20
>>> There are two tears of DMR. One is for simplex-type
>>> operation such as what one might encounter in a business of some
>>> kind where the staff carry talkies around for tactical
>>> communication. The other tear is repeater-type operation.
>>>=20
>>> A repeater can handle two simultaneous QSO's and each
>>> conversation can have a talk group. Think of the old community
>>> repeater systems that used to be common in the commercial world.
>>> Instead of different CTCSS tones, you have different talk group
>>> numbers which is why the loud tone if somebody just transmits,
>>> thinking the repeater is free when there is a conversation on
>>> their time slot that is on a different talk group.
>>>=20
>>> Local systems are connected to the internet, kind of
>>> like echolink but when you get a talk group going, you tie up
>>> one time slot out of the two available and nobody else can use
>>> the system for that slot unless they want to join the talk
>>> group.
>>>=20
>>> A UHF DMR repeater has one input frequency and one
>>> output just like an analog repeater but two users can share the
>>> input because their transceivers send packets of audio in bursts
>>> at about 20 bursts per second but the repeater tells each
>>> transceiver when it's turn comes so they both interleave their
>>> packets. It's elegant but I can't imagine it on ten or six
>>> meters due to the time lag over skip distances. It would foul up
>>> the repeater's timing and you'd probably be able to hear the
>>> distant signal but your signals would take too long to get back
>>> to the repeater which would stray in to the other guy's slot.
>>>=20
>>> I saw a lot of neat technology, here, but since there is
>>> no Linux support, it's the same old same old.
>>>=20
>>> =09
>>> Since DMR is an open standard, however, there is more likely to
>>> be something useful later as more people will be making
>>> equipment.
>>>=20
>>> Sorry for the length of this post, but I figured some
>>> might find it interesting.
>>>=20
>>> By the way, the audio is very good, similar to P25 if
>>> you have heard that.
>>>=20
>>> 73
>>> Martin WB5agz
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