I've been wanting to write this down for a long time, but just kept the bits of info on my computer for some reason, so here it is:
Please Note: This is my preference,
Radio: Icom IC-9100 - maybe IC-7300
Normal PC: Windows 10
Inter-connect: U5-Link from Aliexpress
This is how I connected the three together:
Also you need to follow the Icom Manual to download the correct USB driver
Pg12: (of the manual)
The USB driver and the installation guide can be
downloaded from our website.
➥ http://www.icom.co.jp/world/index.html
The following items are required:
PC
• Microsoft® Windows® XP,
Microsoft® Windows Vista® or
Microsoft® Windows® 7 OS
• A USB 1.1 or 2.0 port
Other items
• USB cable (purchase separately)
• PC software (such as optional RS-BA1 or CS-
9100)
NEVER connect the transceiver to a PC until the
USB driver installation has been completed.
About the modulation input:
Select “USB” in the Set mode item “DATA OFF
MOD” or “DATA MOD.” The modulation input level
from the USB jack can be set in the Set mode item
“USB MOD Level.” (p. 167)
I also used the following settings for data mode on the radio: