Standard Television Switching Equipment
Rudy Bretz · Journal of the Society of Motion Picture and Television Engineers · 1950
There is a considerable difference in design among the standard switching systems put out by the three major television manufacturers. General engineering departments of the major networks and many of the independent stations have designed and built their own systems. All studio switching systems should permit the operator to fade to black, lapdissolve and superimpose. Not all will permit more complicated effects such as cutting to a superimposure, or cutting away from a superimposure to a shot on another camera. Not all will permit the operator to preview a superimposure before he makes it. The following article lists the requirements of television switching systems from the operating point of view and describes the operation of the standard models which are in use in television stations today.