Setting Up Your A-575 System
Model A-575 User's Manual
M
OTION
D
ETECTION
S
ETTINGS
Motion detection is a process undertaken by the wireless DVR based solely on the image it
receives from the camera. There are no external sensors to connect, nor does the camera
send a signal to the wireless DVR telling it to record. The DVR "watches" the image from
the camera, and detects differences between frames. A frame is one still image. A series of
frame, played quickly, one after another, gives the illusion of motion. A single frame is
displayed for between 1/25th and 1/30th of a second.
This means that when the wireless DVR is looking for motion, it is detecting a change in
the picture, specifically, counting how many pixels (the individual dots that make up an
image) change from one frame to the next. This includes pixels changing color, brightness,
or a combination of the two.
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