I made some progress with the Symmetricom CGBA card I bought on Ebay and mentioned here last Friday. After getting it running and checked out, I took a closer look at the board to see if I could communicate with it. What I found was 3 unused holes on the board marked 'USER' and 2 of those pads had runs going to an MB3232I (MAX232) RS-232 chip. After I tried several things that didn't work I finally got it to respond at 9600 8N1 and typing '?' displayed the list of SCPI commands it accepts. It was made by Samsung in December, 2003 and seems to have an 8-channel receiver. I'll remove the onboard LEDs and mount them on the front panel of the box I'm building it into (I do like flashing LEDs!) and not have any other display on the unit, the PC terminal emulator program should be enough. There is a link below to a photo of 2 of the data screens it displays. I suspect the H/W fails are because it isn't plugged into its intended backplane.
-Arthur http://i906.photobucket.com/albums/ac262/rjb1998/CGBA%20screen_zpsbizmqype.jpg _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.