GMRS — General Mobile Radio Service
No exam, but real rules. Channel plan, power and antenna limits, repeater use, identification, and the FRS/GMRS/MURS boundary that trips up most operators using the handhelds already in the drawer.
- Modules
- 5
- Study time
- 49 min
Your progress
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Modules
01 The Licence
DraftWho may hold a GMRS licence, who may operate under it, how long it lasts, and what the application actually involves.
- 01Who May Hold a GMRS Licence, and Who May Use ItState who is eligible, who may operate under someone else's licence, how long a licence runs, and what the application actually asks for.8 min5:46
- 01Who May Hold a GMRS Licence, and Who May Use ItState who is eligible, who may operate under someone else's licence, how long a licence runs, and what the application actually asks for.
02 Channels and Power
DraftThirty channels in three tiers, each with its own power limit, bandwidth, and set of station types allowed to transmit on it.
- 01The Thirty ChannelsRead the GMRS channel plan as four tiers with different power limits and different permitted station types, instead of as a list of 22 numbers.10 min8:32
- 01The Thirty ChannelsRead the GMRS channel plan as four tiers with different power limits and different permitted station types, instead of as a list of 22 numbers.
03 Repeaters and Tones
DraftHow the 467 MHz main channels turn into repeater inputs, what CTSS and DCS tones do, and the one thing they conspicuously do not do.
- 01Repeaters, and What Tones Really DoWork a GMRS repeater from a handheld, and stop believing that a privacy code makes a channel private.11 min6:54
- 01Repeaters, and What Tones Really DoWork a GMRS repeater from a handheld, and stop believing that a privacy code makes a channel private.
04 Rules of the Road
DraftIdentification, permissible and prohibited uses, emergency priority, and the handful of rules people break without realising.
- 01What You May and May Not TransmitIdentify correctly, know the permitted uses, and recognise the prohibitions that catch otherwise careful operators.9 min7:00
- 01What You May and May Not TransmitIdentify correctly, know the permitted uses, and recognise the prohibitions that catch otherwise careful operators.
05 FRS, GMRS, and MURS
DraftThree unlicensed-or-lightly-licensed services that share hardware, overlap in frequency, and have incompatible rules — plus why the cheap handheld in the drawer may be illegal to transmit with.
- 01FRS, GMRS, and MURS — Three Services, One Drawer of RadiosTell the three services apart by their rules rather than their marketing, and work out whether a given radio is legal to transmit with.11 min8:48
- 01FRS, GMRS, and MURS — Three Services, One Drawer of RadiosTell the three services apart by their rules rather than their marketing, and work out whether a given radio is legal to transmit with.