Raytheon Company. Dage-Bell Corporation. Instruction Manual: 101580-01 and 101581-01 Video Switchers. Manual Part No. 970122-01. Table of Contents: Specifications, General Description, Installation and Operation, Replacement Parts, Schematic, and Warranty. On page 1-1, there is an illustration of Application Options. These video switchers are designed to use from one to six inputs and select any one of these as an output (unterminated) to feed a monitor or other device requiring a video input.