Question
What is the purpose of the color code used on DMR repeater systems?
Answer Options
- A) Must match the repeater color code for access
- B) Defines the frequency pair to use
- C) Identifies the codec used
- D) Defines the minimum signal level required for access
Correct Answer: A
Explanation
DMR (Digital Mobile Radio) systems use a setting called the Color Code, which acts like the CTCSS tone (T2B02) used in analog FM systems. The color code is a unique digital identifier that is sent with the transmission’s data stream.
Your radio’s color code must match the repeater color code for access (or for the repeater to accept and retransmit your signal). If the codes don’t match, the repeater will ignore your signal, keeping its output silent. This mechanism helps to isolate one DMR system from another, even if they share the same frequency.
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