DMR Technology, FAQs and links


This page will be kept updated (update 6/10/17) to contain useful information and links for those interested in our DMR repeater and the technology. Please feel free to contribute.

Phoenix network web link here

GB7TC Usage Stats here

GB7TC TALKGROUP DETAILS

The basic talkgroups for GB7TC on CC-3.net are:

Time Slot 1



Talk Group
Coverage
1
Worldwide
2
Europe
9
Local (Secondary)
13
Worldwide English
235
UK Wide
80
UK only 1
81
UK only 2
113
Worldwide English Language 1
123
Worldwide English Language 2
119
Worldwide Any Language 1
129
Worldwide Any Language 2


Time Slot 2

Talk Group
Coverage
9
Local Primary
810

South West England Regional (mirrored with 
TG950 temporarily on GB7TC)
801,802,820,830,840,
850,860,870,880
Other Regions - User Activated (10 minutes)
9990

Echo Server.  Plays back your speech for 
radio and microphone testing.
 
Explanation  and full list of talk groups and time slots on GB7TC can be downloaded here

For further information and more detail see www.dmr-uk.net

TYT MD380

The Tytera MD380 DMR/FM handportable has become popular with a lot of radio amateurs. The latest code plug with GB7TC included can be downloaded here md380-rt3-swindon.rdt
At a cost of less than £80 it has proven to be a useful entry to DMR with good audio reproduction, easy programming, great battery life and a solid construction. The only downside seems to be the poor selectivity in the receiver front end. All in all a great starter radio.

USING RF POWER AMPLIFIERS WITH DMR TRANSCIEVERS


The general concensus is 'DON'T!' The switching speed and rise/fall time requirements for TDMA far outstrip the capabilities of most external RF (linear) Power Amplifiers. For more information see link: .Linear Amplifiers and DMR.pdf

HYTERA MD785G

Hytera MD785G User Manual "note this is the full manual not the short version that comes with the Tranceiver" (please click the link below)
https://www.dropbox.com/s/mgwkymxctdvqr87/Hytera%20MD785G%20User%20Manual.pdf?dl=0

Hytera MD785G  "Guide to the codeplug & programming" (click the link below to view)
https://www.dropbox.com/s/ygjgornkntny3pi/Hytera%20DMR%20CPS%20Guide%201.pdf?dl=0









Please send any contributions to this page to g6reg(at)rrg.org.uk




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