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Digital Mobile Radio (DMR) Overview

In the ever ongoing effort to squeeze more capacity out of a finite resource, the electromagnetic spectrum, a new digital standard, Digital Mobile radio (DMR) emerged.

Whereas the older analogue FM requires 25 kHz channels or for newer systems 12.5 kHz, DMR offers two channels within 12.5 kHz. DMR offers both voice and data communications and interfacing to external networks. Voice communications offer features as call alert, emergency call, remote monitoring, silent worker, Push-to-Talk ID, radio check, all call, stunning etc.

DMR has been standardized by ETSI.

The standard describe three tiers of DMR:

Tier I: Direct mode communication without infra-structure

Tier II: Direct mode and base station repeater

Tier III: Trunking with a controller managing communications, including simulcast and multicast.

To distinguish between adjacent and repeater stations with overlapping coverage, DMR introduces the concept of Color Code.

Interlinking of TRBO repeaters (or base stations) is very easy using Motorola's implementation of the "MOTOTRBO" IP-Site Connect feature - a MOTOROLA proprietary means of using basic IP connectivity such as your home or office internet IP connection, anywhere around the world to link repeaters.

Claude VE2YI • Chris VE2OOK • Cliff VE2YU


Cabane a Sucre 2013
April 6, 2013

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Cabane a Sucre was held on
March 31, 2012

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Christmas Party 2011
December 7, 2011

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Corn Roast 2011
August 27, 2011

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Our club's first Field Day
June 25-26, 2011

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Cliquez ici pour voir notre carte QSL dédiée à 2011 ARRL Field Day

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Cabanne a Sucre was held on April 2nd 2011

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Cabanne a Sucre was held on March 20th 2010

A good time was had by all. Look in the photo gallery for all the photos. (Click on the image ->)

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Corn Roast 2010

Was held at Cliff's House and a great time was had by all. Take a look at the photo gallery under Corn Roast 2010. (Click on the image ->)

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