Repeater offsets, tone squelch, and net operating procedures for amateur radio operators.
29 cards · basic cards · AI-written, checked twice. Edit anything.
- What is a repeater offset?
- The difference in frequency between the repeater's transmit frequency and receive frequency.
- What is the typical offset for a 146 MHz repeater?
- Plus 0.6 MHz (the repeater transmits 0.6 MHz higher than it receives).
- What is the typical offset for a 445 MHz repeater?
- Plus 5 MHz (the repeater transmits 5 MHz higher than it receives).
- What is a duplex repeater?
- A repeater that receives and transmits on different frequencies simultaneously.
- What is simplex operation?
- Transmitting and receiving on the same frequency, one at a time.
- What does CTCSS stand for?
- Continuous Tone-Coded Squelch System.
- What does DCS stand for?
- Digital-Coded Squelch.
- What is tone squelch?
- A system that only allows your radio to receive signals carrying a specific tone or code.
- Why is CTCSS or DCS used on repeaters?
- To prevent the repeater from transmitting interference from adjacent frequency users.
- What is a net?
- A scheduled radio conversation where multiple operators check in to a net control station.
- What is the role of a net control station?
- To manage the flow of traffic, recognize check-ins, and coordinate communications.
- What should you do before transmitting on a repeater for the first time?
- Listen first to ensure the repeater is clear and to identify the proper offset and tone requirements.
- What is a courtesy tone?
- An audible signal (usually a beep) that a repeater sends after each transmission to indicate it is ready for the next.
- What does 'over' mean in ham radio?
- A signal that you have finished transmitting and are waiting for a response.
- What is a 'check-in' to a net?
- When you identify yourself to the net control station and indicate you are present and ready to participate.