Do not connect the USB cable until you have downloaded and installed the driver. Step one, if you haven't already, download and install the latest USB driver from Icom for your Icom IC-7300.
If you just want to use a USB Cable with HRD and operate some PSK31 or RTTY (AFSK), take a look at this video. I have found this to be the easiest, because later on I added cw keying and RTTY (FSK) to the mix. Use the CI-V for rig control and the USB for the soundcard.
One is the USB cable connected to the radios USB port and the other is a CI-V cable connected to the radios CI-V port. UPDATE: New article using the Icom 7300 with Ham Radio Deluxe v6.5 Icom 7300 Ham Radio Deluxe Setup So if you're interested in the 'swiss army knife of ham radio' and using it with the Icom 7300, you're in the right place. The free version is what I use here and is still available here. Free to use for years and now available for purchase and technical support. It was originally developed by Simon HB9DRV and Peter PH1PH. Ham Radio Deluxe has been my go to software for rig control, logbook and digital mode operation for many years now. Yes, In the long run I believe two cables are easier than one. Why use two cables? Because I want to use the radio to it's full capability while keeping it simple. Icom 7300 Ham Radio Deluxe Setup is so easy and in this example I use a couple of cables. In this one we use the old free version of Ham Radio Deluxe.
