Unfortunately, many computer software (for example HRD free version) does not support setting a higher baudrate than 19200 for CI-V ports. This is the famous UNLINK from REMOTE setting. This requires the USB to be disconnected from the REMOTE port, as explained above. This function requires the baudrate set to 115200.

The Icom remote software (RS-BA1) has a scope function. Actually, the USB baudrate options are grayed out in the settings menu in this case. CI-V rate on the REMOTE port, being 19200 baud.

So when USB is connected to REMOTE, the USB baudrate gets limited to the max. A requirement for connecting in parallel is that all devices use the same baudrate. Note that the CI-V protocol is a one wire bus protocol (half duplex) and supports connecting devices in parallel. The CI-V is accessed via USB or the CI-V jack plug (called REMOTE by Icom) By default, these are connected internally, see this image below. going from digital to analog to digital domain again, solves all sample rate conversion issues. From a practical point of view, this is the best solution, although theoretically it might be questionable. Actually, when you analyze the schematics, you’ll see that the build-in interface does not differ from most external interfaces: the decoded analog audio is actually converted to digital again in the USB Audio CODEC. There is nothing Icom specific in the USB part of the IC-7300. The Audio CODEC inside the IC-7300 does not requires a separate driver install. No need to install the Icom supplied driver. This driver is automatically installed when on Win8.1 or Win10. The SiLabs CP210x USB to UART (Serial Port) bridge chip inside the IC-7300 needs a driver.

Best usb serial adapter icom remote