An analog monitor is a type of entity that represents a monitor that displays video from an analog source, such as a video decoder or an analog camera. This term is used in Security Center to refer to monitors that are not controlled by a computer.
A video decoder is a device that converts a digital video stream into analog signals (NTSC or PAL) for display on an analog monitor. It is one of the many devices found on a video decoding unit. A video decoding unit can have multiple video decoders, each connected to an analog monitor. Each video decoder found on a video decoding unit is represented by an analog monitor entity in Security Center.
The monitor group entity is used to configure the properties of a group of analog monitors.