Gerry, thanks for the analysis. I'll have to re-connect the fixture to double check the hardware. I'll look at the snaps again to verify the technique. I just looked at amplitude before. The problem arose with a GPS talking through a multiplexer to a radio. I tried direct wiring the GPS to radio and...

Hello, I'm a new user of a 2205A. I'm debugging a 9600 baud serial problem. Chan A set to input of a multiplexer box, chan B set to the output. The serial decode seems to work only for the channel which is the trigger. I've tried changing offset and hysteresis, no help. I'm attaching two psdata file...