Plug the cable into the radio's speaker/mic jack and the other end into your PC. Turn the radio on.
While some high-end radios allow "Front Panel Programming" (FPP), the IC-F3000 series is designed for simplicity and durability, meaning it lacks a full keypad and screen for manual entry. The is the only way to accurately manage the 16 channels and deep-level signaling settings required for professional use. icom cs-f3000 programming software
Pro Tip: While cheap third-party cables exist, they often use inferior chips that cause "Communication Error" messages. Genuine Icom cables or those with FTDI chips are much more reliable. Plug the cable into the radio's speaker/mic jack