Thanks to the efforts of Glenn, N3MEL, I made some progress today, But still not working correctly. I was able to decode on 14.105 but the the PTT test fails. The PC is running Windows 11 PRO and Ports are COM 1 and 3 . The driver for Port 3 is Silicon Labs CP210x. The CAT cable from the IC-7300 has a Ferrite cord with 11-turns. When that is connected to a j5create 7-port USB hub the VARA HF VU meter reads mid scale, however when the hub is bypassed and the ICOM CAT cable is connected via a USB extension cable to the PC there is no reading on the VARA VU meter. It is possible that the extension cable is defective. What is important to note here is that even with a VU meter reading, the "test PTT-ON" button on VarAC setting does not work. The radio CI-V Baud Rate is 19200 and VaraC is set to the same rate. Depressing the button produces a red error message that says "Unable to send command to Com port. Make sure that Omnirig or other programs are NOT holding this COM port access to the port 'COM3' is denied." It does not appear that other applications are running that use COM 1 or 3. When the CAT cable is disconnected from the hub, then COM3 disappears. It also seems that other rig control functions like frequency change do not work. I also not that FT8 using JTDX as well as WSJT-X works just fine with the same PC and cables. BTW, the drivers are the latest from ICOM Japan. I did discover that many calls and associated data (bandwidth, time, slot and SNR were captured and logged.
One commenter asked for details so here they are. Comments or Suggestions?
73, Carl WA0CQG
