A) A term used to describe the chaining of a video signal through several video devices (distribution amplifiers, VCRs, monitors, etc.).

A VCR may be hooked up to a distribution amplifier which is supplied with a video input connector and a loop output connector. When a signal is fed to the distribution amplifier, it is also fed unprocessed to the loop output connector (parallel connection) on the distribution amplifier. In turn, the same signal is fed to another device which is attached to the first one and so on. Thus a very large number of VCRs or other video devices can be looped together for multiple processing. b) An input that includes two connectors.

One connector accepts the input signal, and the other connector is used as an output for connecting the input signal to another piece of equipment or to a monitor.