Waypoint
Radio Lab
Simulation · no radio required · progress stays in this browser
Technician Remediation · Labs · TR-04
CQ, repeater offsets including 70 centimeters, reverse, DTMF, DMR, nets, formal traffic, and ARES versus RACES.
NOT STARTED
Work through the six stages. This remediation lab fills a gap left by Foundations and Core. Finishing it does not finish the Technician syllabus, and it is not Technician exam readiness.
Stage 1 of 7
Labs 02 and 03 and TC-02 taught the radio, a 2-meter offset example, and a first call. This lab is the rest of the operating: CQ, a 70-centimeter offset, reverse, tones, a directed net, a short formal message, and a public-service role. No microphone is required. Offsets shown here are common United States examples, not a rule for every repeater.
Stage 2 of 7
A repeater output and input are separated by the offset. The sign can be plus or minus. Reverse listens on the input. DTMF is a keypad command. DMR still needs a talkgroup and a color code after the frequency is set.
Stage 3 of 7
Use the repeater the way you just configured it, then deal with interference, join a directed net, and pass a message without rewriting it. QRM is interference from other stations. QSY means change frequency.
Stage 4 of 7
Why is listening and understanding how a frequency is being used often more important than immediately transmitting?
Stage 5 of 7
These are Radio Lab practice items about the operating you just did. They are not the official pool.
Stage 6 of 7
Public-service operating mission. An organized race is already on the air. Configure the radio, join the directed net, pass a short message, deal with interference, and leave the frequency clear for a priority call.
Stage 7 of 7
Formal voice traffic is not the only way a message moves.