Now that I have made up the patch cable to interface the Fox Delta STS2 controller to the Yaesu G-5400B Az/El rotor, all my problems are solved, right? 

No. 

Loaded the drivers from the Fox Delta site, and connected everything up. My computer, which runs Windows 10 recognized the new USB controller and assigned it to COM Port 3. 

The setup instructions for the STS2 advise me to use the terminal emulator program such as Hyperterminal to verify communication between the computer and the STS2. 

Unfortunately, Windows 10 no longer includes Hyperterminal. 

Tried downloading about ten different terminal emulators…and have been unable to successfully verify communication. 

Ultimately, I’d like to interface the Fox Delta STS2 to PCSat and have it automatically track satellites during passes. 

If anyone has faced similar challenges, and can offer assistance, I’d be very grateful.