What are Switchers? How are they used? Categories Cross Reference Table

	Step 1: What are Switchers?
	Switchers enable multiple video and audio signals to be selected and sent to one or more display devices. For example, to view two computers with separate presentations, a switcher would be used to physically connect both of the inputs to the display device. The switcher would then be used to select or "switch" between the two computer presentations, allowing the user to alternate back and forth. To select the right switcher for a specific environment, begin by identifying the following things: What are the signal types (e.g., computer, composite video, RGB, stereo audio)? What are the connector types (e.g., BNC, S-video, 15-pin HD)? How many inputs and outputs are needed? Will there be switching between both video and audio sources?