A unique camera number system from Autoscript. A large LED indicator
displays the camera in green (1-9) whilst in standby and then turns red
when the camera is live. Switching from green to red is achieved by a
photo electric cell that can be attached to the camera tally light.
+TallyPlus+ retrofits to the whole range of Autoscript TFT's and has
the unique feature of a 2nd photo electric cell built into the rear of
+TallyPlus+ that docks with Cue light on the TFT.