VK DMR INFORMATION

THE AUSTRALIAN AMATEUR RADIO DMR REPEATER NETWORK

radio id

Each radio used on the DMR-MARC network is programmed with a unique user ID number. 

You MUST register your radio for it to work correctly.

ID numbers are managed centrally by DMR-MARC, and may be obtained here.

The user ID database may be found here.

transmit audio levels

Some equipment tends to have over driven audio on tx - it is very important that you check your transmitted audio for the correct level. 

Motorola equipment with the latest firmware can be run with audio AGC on.

gps position

DMR equipment is often fitted with an inbuilt GPS receiver, with the facility to transmit GPS position over the network. 

This function is not supported by the DMR-MARC network, and must be OFF.  

 

COLOUR CODEs, SLOTS AND TALK GROUPS 

The DMR system uses 15 "colour codes" which function in a very similar fashion to CTCSS tones on analogue repeaters.  A radio programmed with one colour code will not be able to transmit on a repeater programed with another.

All Australian DMR amateur repeaters use colour code 1.

As discussed previously, each DMR repeater has two slots, and each slot has a number of talk groups.

In general terms, Slot 1 is used for overseas repeaters and slot 2 is used for regional (VK/ZL) repeaters.

Australian DMR repeaters use the following slots and talk groups - these need to be programmed into your radio:

Time Slot 1 - TG1 = Worldwide calling (keys ALL worldwide repeaters..2 min max QSO) - user activated*

Time Slot 1 - TG13 = Worldwide English calling (keys repeaters in English speaking countries)

Time Slot 1 - TG5 = South Pacific regional

Time Slot 1 - TG113 = User Activated English chat channel*

Time Slot 1 - TG123 = User Activated English chat channel*

Time Slot 1 - TG9 = Keys your local repeater only

Time Slot 1 - TG8 = Keys repeaters in defined groups - i.e. all Sydney, all Melbourne, etc.

Time Slot 1 - TG133 = Connects to DMR+ reflector 4369 (USA) - user activated.

Time Slot 1 - TG143 = Connects to DMR+ reflector 4404 (UK) - user activated.

Time Slot 1 - TG153 = Connects to DMR+ reflector 4851 (Pacific) - user activated.

 

TG1 keys every DMR repeater, TG5 keys South Pacific repeaters and TG13 keys every repeater in english speaking countries.  These channels are normally used as calling channels only.

User activated TGs are activated by pressing your PTT for about 2 seconds with the TG selected.  They time out after about 5 mins.

User activated  TGs 113/123  are used as a "chat channel" after a call on TG1, 2, 3, 5 or TG13, to reduce network loading - only repeaters used by those in the QSO are keyed, rather than the entire network...

They are activated by pressing your PTT for about 2 seconds with the required TG selected. They normally time out after 5 mins if left idle.  

Please QSY to TG113/123 after establishing contact with a DX station on TG1, 2, 3, 5 or 13.

 

Time Slot 2 - TG505 =  VK repeaters only (keys all VK repeaters) - this is the main VK talkgroup.

Time Slot 2 - TG3800 = Some VK repeaters, also links to DMR+ reflector 4800 (VK) (Not connected to all repeaters - see www.vkdmr.net).

Time Slot 2 - TG380x = State/Territory based TG, where x is the VK call area - keys all repeaters in that State/Territory only. Can also be used from another state - use the TG for the state you wish to connect to - i.e. 3802 for VK2, etc.  The inter-state link disconnects automatically if there is no activity for 15 seconds.

 

505 is the national channel - please use it for QSOs.  As per normal repeater practice, please leave a break between overs for other stations.

If 505 is busy:

  • TG9 on slot 1 can be used to work another station on your local repeater only.
  • TG380x on slot 2 can be used to work a station in your own state or a station in another state.
  • TG8 on slot 1 is available for repeaters in a group.
  • TG123/113 can be used to connect to another repeater directly.

 

Time Slot 2 - TG9 = Reflectors.  This provides access to the DMR+ network of reflectors.  A list of reflectors may be found here

To access reflectors, your radio needs to be programmed with different TGs for tx and rx to access the reflector and TG9 for tx/rx to use the relfector.

TG5000 checks your local repeater status (or look on line at www.vkdmr.net).

You then use the reflector number you wish to connect to as the tx TG - i.e. TG4400 for ref 4400.

Once you have connected, use TG9 for tx and rx to QSO via the reflector.

TG4000 is used to disconnect your repeater from the reflector, or you can just let the reflector time out - they will drop in 15 mins if not used.

 

There are two ways to program your radio to access reflectors:

1. program separate channels; or

2. use your radio's keyboard.

 

To use method 1 - program the following channels on slot 2:

Channel 1 - TG5000 tx, TG 9 rx to check status

Channel 2 - TG4xxx tx (required reflector number), TG9 rx

Channel 3 - TG9 tx and rx for working the reflector

Channel 4 - TG4000 tx, TG9 rx to disconnect

 

Method 2 - using the keypad - is a lot simpler - you only need to program one channel:

Channel 1 - TG9 tx and rx.

Use your keypad to enter 5000, the reflector number and 4000 as required.

 

TG13, TG5, TG505 and TG3800 and TG380x (for your State/Territory) are on permanently - they are not user activated.