The GUI is a transmitter monitoring computer inside the Sigma transmitter. The touch screen failed (the video) so I built another computer for the job.
Windows 2000 computer with LPT port and 2 com ports – com 2 and com 3- all setup and tested in advance before installing GUI software the ports. Also a lan card setup on your network. I also install Tight VNC remote control software. And software to make a backup image of drive to boot to cd and restore.
Emails and notes on Install (pdf file): ReplacementcomputerSigmaGUI