okay so ive been licensed for about three months now and i finally got my baofeng programmed to hit the local 2m repeater but im not totally sure i understand how the CTCSS stuff works. like i know i need to set the encode tone to whatever the repeater wants (its 100.0 hz for the one near me) but do i also need to set the decode tone? my radio has both encode and decode settings and i wasnt sure if i should set both or just the encode side.

also someone on the air last week mentioned something about a linking system and how the repeater ties into some network i think it was called IRLP or maybe echolink? and they were asking people to stand by before making calls. is that a thing i should know about? like is there some kind of etiquette around when repeaters are linked up vs when theyre not? i dont want to step on anybody or come across as that new guy who doesnt know what hes doing. well i mean i am that guy but still

good questions and dont worry you'll get the hang of it pretty quick. so for CTCSS — you only need to set the encode side for most repeaters. that tone goes out with your transmission so the repeater's squelch opens up when it hears you. the decode side on your radio is for YOUR squelch, meaning your radio will only open up when it hears that tone coming back. a lot of people set both to the repeater tone just to keep things clean and avoid hearing random noise or other signals that might sneak through, but it's not strictly required for accessing the repeater. depends on how busy your area is honestly.

as for the linking stuff yeah that's a whole other thing. when a repeater is linked via IRLP or echolink it's basically bridging your local RF signal to another repeater somewhere else, could be across the state or across the world. the courtesy goes both ways — you want to leave longer pauses between transmissions so guys on the far end can jump in, and if someone announces a link is active or they're trying to connect somewhere just hold off for a bit. most linked repeater systems have a specific tone or ID that plays when a link connects or drops. once you hear it a few times you'll recognize it. your local repeater club probably has a page or document somewhere with all the specifics for that machine.

yeah what he said. i was in the same spot when i started and the decode thing tripped me up too. i just ended up setting both encode and decode to the same tone and never had an issue. one thing i'd add — some repeaters around here have different tones depending on which mode they're in when linked vs not, but that's probably more than you need to worry about right now. just listen for a while before transmitting, seriously that one habit saves so much awkwardness. you'll learn the rhythm of how people use the local machine pretty fast just by monitoring.