+ AA6YQ comments below
Steve, can you please clarify which port you're suggesting is the correct one to point to? Standard or enhanced? I'm confused by reading post 192281. My COM3 is standard, COM4 is enhanced (as designated by the 1 & 2 in location path).
+ The TS-890 documentation states that the "standard" port is the one to use for CAT control. Does the Windows "Com3 Properties" window indicate that this port is functional?