User`s manual

Glossary 103
GLOSSARY
A
Active Window The DigiMux display pane that displays a real-time
camera view. The user-selected Active Window displays
images at 90 ips. For more information on Active Window,
see
Select Active Window on page 17.
Alarm Contact A sensor which, when activated, signals a change from
normal system operation. Alarm contacts are associated
with cameras.
Alarm Event A recorded action that triggers a programmed response,
such as a buzzer and/or a change in recording rate. Alarm
events are often recorded at a faster rate than normal
activity.
Alarm In Pin A connector on the rear panel that allows an alarm relay to
be attached and activated. When activated, the alarm
signal generates a change from normal operation.
Alarm List A text log of the alarm events that are currently generated.
Analog A signal of varying strength which corresponds to a
physical change or variation in what the signal represents.
Aspect Ratio The ratio of the vertical to the horizontal image size. The
NTSC standard aspect ratio is 4:3.
B
Baud Rate A rate of transmission measured by the number of bits per
second sent over a computer-controlled communications
line.
Bit A binary digit representing a unit that contains a 0 or a 1.
This information yields yes or no, true or false, start or
stop. A bit is set if its value is true or 1, and clear if its value
is false or 0.