Science glossary film: Analog

An analog signal is one in which any variation in amplitude or frequency is continuous. This is in contrast to a digital signal, which has discrete values – like on or off, one or zero. Analog signals can be more accurate, but they can lose their quality over long distances and carry less information per second than a digital signal.

This is in contrast to a digital signal, which has discrete values – like on or off, one or zero. Analog signals can be more accurate, but they can lose their quality over long distances and carry less information per second than a digital signal.