MULTIPLE SCREEN DISPLAY
Any system that combines more than one video signal is technically a multiplexer. These days it is customary to refer to multiplexers as equipment that can simultaneously combine right or more signals, otherwise they are known as screen splitters or quad splitters.
There will be many occasions when it will be advantageous to display more than one camera on the monitor at the same time. One example is if an incident occurs but it is not certain just where it originated. With a simple switching device it would be a tedious business to review all the cameras recorded in sequence. Also, as stated previously, essential information may be lost. However if all the cameras were recorded simultaneously and could be displayed simultaneously then reviewing and finding the sequence of events would be very much easier. In addition, virtually no information would be lost and the rel3vant scenes can then be analysed with full screen pictures.
The essential benefit therefore of recording in the various multiple screen formats is that no information is lost due to dwells in switching.
