Should just need an USB A to B cable to go from rig to computer. Download the WSJT-x software, and set it up. If you get lost, contact me, and we can go over it on the phone. We can do a screen sharing program called Anydesk which is free for personal use on the web. This will allow me to set up the software, you will still have to make some programing changes on the rig to use the USB B port on the rear. Should not have needed the signal link for RTTY either, that can be done over the USB port on the rear using programs like FLdigi. I use N1MM loging software with the engine out of FLdigi runnuning under N1MM's control for RTTY and all other digital modes. OF course the 7600 itself can run RTTY and PSK natively without a computer just like my 7610 with just a keyboard in the front USB connector, but I never have done that. I prefer the programs with their macros' and integration to my logging program.
Lots of way to skin this cat, but bottom line you should just need the USB cable, the WSJT-x software and a network time protocol program running as a service on the PC. I use Nettime. But there are many others. You will also need the driver from Icom japans. website for the 7600 to be installed on your PC before you plug in the rig.
USB Connectors on the Front and Rear Panel
USB connectors The IC-7600 has one USB connector on the front panel and one on the rear panel. You can connect a USB keyboard or USB flash drive to the front panel (type A plug) and connect a PC to the rear panel (type B plug). Using the CI-V data format and external software*, you can control the IC-7600 from a PC via the USB port. You can also transfer audio, both transmit and receive, via the USB port.
Download the USB driver now!
*Software is not supplied from Icom.Icom Japan website to down load the driver:
https://www.icomjapan.com/support/firmware_driver/2417/Anydesk screen sharing software if you need my help:
https://anydesk.com/enWSJT-x FT modes software:
https://wsjt.sourceforge.io/wsjtx.htmlNetwork time protocol software NetTime, runs as a service:
https://www.timesynctool.com/