>Point a video camera at the screen, tape it and freeze frame the result? > >This will only work if the waveform occurs while the CCD is capturing the >image. > >Bob Ammerman >RAm Systems Very good idea! A CCD camera used under low light conditions is in the integration mode most of the time so the probability to catch the signal or its afterglow trail is high! I wish I had thought of that. Perhaps capturing in moovie mode with a PC connected camera (USB etc) will have the same result if the frame rate is high and the light level low (shade out all room light using a cardboard mask and turn on the scope reticle backlight on low - you may not need that, the trace will illuminate some of the reticle). Peter -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body