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Normally everyone using a repeater transmits on the repeater's input (RX) frequency, and receives on the repeater's output (TX) frequency, so when configured correctly your radio will only be listening to the repeater's output (TX) frequency and not listening to other radios' transmissions directly since they will be transmitting on the repeater's input (RX) frequency.īut what if you do want to listen to their transmissions directly? In this case you'll want to listen on the repeater's input (RX) frequency like the repeater does. ( Source) In other words, the usual RX and TX frequencies are swapped (reversed). "Reverse Split" means operating duplex on a reverse frequency split compared to what is considered "normal" for the situation. Radios must be configured properly for duplex communication to use a repeater. This is called operating Duplex (vs Simplex where only one frequency is used for both TX and RX). UHF/VHF repeaters receive on one frequency (input frequency) and then re-transmit on another frequency (output frequency), usually with this "split" in input/output (also called RX/TX) frequencies being 600kHz apart (for 2m) either + or. Listening to the input of a repeater is the reverse of normal! Long Explanation Quick way to remember: normally you listen to repeater output.
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