Indicators show when you are transmitting (red) or when the channel is busy (green).
Icom IC-F121 is a rugged, 50-watt VHF mobile transceiver designed for commercial use, featuring 128 memory channels (IC-F121) or 8 channels (IC-F121S) and a 4-watt front-mount speaker. Buy Two Way Radios Essential Manuals Instruction Manual icom icf121 manual
Q: How do I troubleshoot common issues with the Icom ICF121 radio? A: Refer to the troubleshooting section in the manual or check for nearby sources of interference and adjust the radio's frequency or tone squelch settings accordingly. Indicators show when you are transmitting (red) or
Usually pre-set via software, but can often be toggled using a programmable key (P0-P3) to monitor weak signals. icom icf121 manual