Not so long ago, a TV station’s rack room was an area housing multiple racks filled with a dozen chassis-powering graphics, intercom systems and signal distribution equipment. These devices consumed perhaps 10A per rack, generated little heat and were generally ignored.
The real broadcast action was in the master control room (MCR). Here one would find multiple tape machines, perhaps a library tape machine for automation, gulping enormous amounts of power. Also there would be the master control switcher and film chain, each with an additional operator and perhaps a dozen or so video monitors located around the room. One operator was responsible for handling several tape decks. The area was abuzz with activity. more