Audio & Alerts · Menu 31
TX end tone — sound played to the other party at the end of your transmission.
MENU on the radio to open the menu.31: Roger Beep.MENU again to enter the setting.MENU to save, or EXIT to cancel.Squelch— Squelch threshold — higher values require stronger signals to open the audio gateRX Save— Battery-saver ratio — duty cycle of receiver active time vs sleep time in standbyVOX Switch— Voice-activated transmit — automatically keys PTT when microphone detects speechVOX Level— VOX sensitivity — how loud audio must be to trigger voice-activated TXVOX Delay— VOX hang time — how long TX stays active after voice drops, preventing rapid cyclingSee the full RT-900 menu reference for all menu items.