Deep Dive: T4B07
The correct answer is B: Access information for repeaters and talkgroups. A DMR 'code plug' contains access information for repeaters and talkgroups - all the programming data needed to configure a DMR radio. The code plug is essentially the radio's configuration file. The code plug includes frequencies, color codes, time slots, talkgroup IDs, contact lists, and all other settings needed for DMR operation. It's called a 'code plug' because in the old days, radios used physical plugs with programming, but now it's a digital file that you load into the radio via programming software. The code plug contains everything your DMR radio needs to know to access repeaters and communicate on talkgroups.
Why Other Answers Are Wrong
Option A: Incorrect. The code plug doesn't contain your call sign in CW for automatic identification. DMR has its own digital identification system. Option C: Incorrect. The codec (code/decode algorithm) is built into the radio hardware, not stored in the code plug. The code plug contains configuration, not the codec itself. Option D: Incorrect. The DMR software version is firmware in the radio, not part of the code plug configuration file.
Exam Tip
DMR code plug = Repeater and talkgroup info. Remember: A DMR code plug contains access information for repeaters and talkgroups - all the programming data needed to configure your DMR radio.
Memory Aid
**C**ode **P**lug = **C**onfiguration **P**rogram (think 'CP = CP' = Configuration Program, repeater/talkgroup info)
Real-World Example
You're programming your DMR radio. You create a code plug file that includes: local repeater frequencies (like 442.125 MHz), color codes (like color code 1), talkgroup IDs (like talkgroup 3100 for a regional group), contact lists, and other settings. You load this code plug into your radio via programming software. Now your radio knows how to access the repeaters and which talkgroups to use.
Source & Coverage
Question Pool: 2022-2026 Question Pool
Subelement: T4B
Reference: FCC Part 97.205
Key Concepts
Verified Content
Question from the official FCC Technician Class pool. Explanation reviewed by licensed amateur radio operators and mapped to the T4B topic.