DMR Radio one and three use TS1 and DMR Radio two and four are using TS2 simultaneous on one channel frequency without disturbing each other. In the above graphic the 12.5 kHz Bandwidth of a channel is subdivided into 2 TS’s. Keep in mind that if a repeater works on multiple frequencies, it can not have the same name for both frequencies, you have to modify such an entry in your codeplug channel list or in the channels.csv file if you are importing from there. Due to inconsistencies in the database I dumped the records which made no sense, therefor I am pretty sure it is not complete, but it is a start for you. Here is a worldwide repeater list as an example I have created, which covers all Brandmeister repeaters worldwide which I could find.
Color codes in dmr programming code#
Most repeaters use color code (CC) 1.You will find the CC’s typically in the repeater lists in the internet for your region, state or country. For example, W8UM, our repeater here in Ann Arbor, uses time slot 1 for the local talk group and the Michigan statewide. The time slot is the time slot that the repeater uses for a particular talk group. If this parameter is not set properly, then the repeater will not respond to your transmissions. The color code you have set for a digital repeater in the Channels List of your codeplug must correspond with the color code this repeater uses. To program a DMR radio, that is to say build a code plug. DMR repeaters use Color Codes (CC) much like analog repeaters use. a QSO), this dynamic TG will be removed after 6-10 mins. DMR radios require a programming cable to program the radio using. Depending on the time-out value the repeater sysop has set, you are now in this TG dynamically and without any activity of you (i.e. If you want to use a specific TG, simply select the TS2, the TG you want and press PTT for a short time. Which are static and which are dynamic depends on the sysop and recommendation of i.e. static TG’s in TS1 and dynamic TG’s in TS2. Depending on the setup of your repeater you will have i.e. In DMR two conversations can happen at the same time as the digital packets need less “space” (see graphic below). Analog communication can only do one communication on a channel at a time. It divides the digital transmission on the frequency in two channels, named TS1 and TS2. This will only permit the radio to transmit if there is no signal, or if the signal present on the receive frequency has the same colour code.A timeslot is relatively easy to explain. In the CPS, it is possible to set the TX Admit Criteria to be Color Code Free. MOTOTRBO radios can also be configured to be "polite" to other systems using the same frequency. There is a limitation of course, if two geographically adjacent radio systems use the same frequencies, yet use a different colour code, there will be audio quality issues in the area where radio users are able to receive signals from both systems at roughly the same signal strength.
The regulator simply has to specify a colour code in the licence conditions - much like PL/DPL was used in analogue as a guard tone. This is also useful for telecommunication regulators who have to allocate the same frequency to two DMR licencees in the same region.
Although there is activity from the neighboring system, the radio will ignore all transmissions from the other system because it has a different colour code. A repeater can only be configured with one colour code.Ĭolour code is useful because it can prevent radios from one site or system mistakenly roaming to another site or system which uses the same frequencies. A radio can be configured with multiple colour codes - one for each channel.
A radio which has been programmed with colour code 1 will not be able to transmit on a repeater configured with colour code 2 and so forth.
In a MOTOTRBO radio or repeater, there is a color code field which allows the selection of one of 15 colour codes.
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