Vision Mixer or Switcher: Function
The vision mixer or switcher is the destination point for all picture sources in the studio. The output of all the studio cameras, telecine machines, videotape recorders (when ‘playing in’ inserts to a programme), caption scanners (film strips and slides) are connected to the inputs of the vision mixing unit (or switcher).
The function of the desk is to edit together (by cutting, mixing, etc.) all these various contributions to the production, as the director has planned.
The output of the switcher (studio output) is connected, via distribution amplifiers, to the transmission monitor in the production control area, and to the transmission chain, check monitors, etc., that comprise the television complex. ...
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