Allow Windows Update to find the correct driver (highly reliable with FTDI chips).
Once installed, follow these steps to connect your radio to the computer: Icom Cs-2820 Software Download
If you own an IC-2820H and run Windows 7 or an XP virtual machine, the software is stable and free. For Windows 11 users, expect a battle with compatibility settings. In that case, the investment in RT Systems software saves hours of frustration. Allow Windows Update to find the correct driver
Finding the correct software involves navigating several options: In that case, the investment in RT Systems
Ultimate Guide to Icom CS-2820 Software Download and Programming
Icom does not offer CS-2820 as a free download. It is commercial software. However, Icom Americas and Icom Japan provide a that allows you to view and design a file, but not transfer it to the radio.
| Problem | Likely Solution | |---------|------------------| | “Port not found” | Wrong COM port; USB adapter needs driver; try COM1-4 | | “Timeout error” | Radio not in clone mode? (Some IC-2820H require you to press [M/CALL] + [VFO] while powering on – check manual) | | Software won’t install on Windows 10 | Run installer in Windows XP SP3 compatibility mode | | Garbled memory data | Bad cable or wrong driver for USB-to-serial adapter (use FTDI chipset) |