What Is a Video Multiplexer?
Video applications often require you to manage several different signal sources. A video multiplexer is a device that helps you put recordings of signals from multiple security cameras on one cassette. It handles several video signals simultaneously. Video multiplexers can split a monitor into various display areas and vice versa, i.e., combine output signals from several cameras to a single monitor. You can then record your combined signal on your VCR or wherever else you want to record. They can also provide simultaneous display and playback features. Some video multiplexers allow for remote access. They combine the best features of switchers and quads. Video multiplexers are also called muxes.

What is a Quad Splitter ?
Quad splitters were developed to eliminate the not so cost effective way of one camera per monitor and time lapse recorder design. A Quad enables the user to view up to four cameras on the same screen simultaneously. It displays all cameras on the screen two on the top quadrants and two on the bottom quadrants. This gives the user a tremendous advantage over security camera systems using video sequential or manual switchers. Using a quad, the system operator will not miss any activity he or she would have if they were using a sequential or manual switcher. The Quad allows full screen viewing of any camera with a simple push of a button. Dual page quads are equipped with 8 video input to allow for up to 8 camera connection. The picture is displayed in two separate groups of four cameras. The switch between the two groups can be done manually or it can be set automatically at a predetermined switch time.