Differences

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--- dmr [2019/12/26 17:34]
KD6KPC [What is a Color Code?]
+++ dmr [2019/12/26 17:36]
KD6KPC [What is a Color Code?]
@@ Line 13: / Line 13: @@
 A color code for a DMR repeater is akin to a PL tone for an analog repeater. There 15 color codes (0-15). A radio must be programmed with the correct color code to access the repeater.
-  This is also useful for telecommunication regulators who have to allocate the same frequency to two DMR licensees in the same region. The regulator simply has to specify a color code in the license conditions - much like PL/DPL was used in analogue as a guard tone.
- There is a limitation of course, if two geographically adjacent radio systems use the same frequencies, yet use a different color 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.
- MOTOTRBO radios can also be configured to be "polite" to other systems using the same frequency. In the CPS, it is possible to set the TX Admit Criteria to be Color Code Free. 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 color code.
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