I purchased a USB to RS-232 cable to test this.? My older USB to RS-232 converter cables are no longer supported by Microsoft.? ?:(
I'm curious if you tried to connect your virtual cable to the EXT Serial interface in YCAT to something like OmniRig.? ?As far as frequency changes, that should work in that interface.
In the future we can add a specific expansion serial port.
Best regards,
? ?Steve? ?-? ?KC5NK
SteveO - KC5NK