Trunked-radio control channel
A nonstop data channel that runs a trunked radio system, telling radios which channel to use for each call.
ModeTrunked-radio control channel
FamilyControl channel
Audio exampleComing
What does it sound like?
Plate 71Control channel
A constant, never-ending digital buzz or warble.
Field marksNever stops while the system is onData only, no voice
Who uses it?
Public safety, government and business radio systems.
Where and when can I hear it?
VHF, UHF, 700, 800 and 900 MHz.