Operator`s manual

G-2 AD168 System Operator’s Manual
D
data bits The number of bits in a data word.
dedicated monitor A monitor connected directly to a specific camera via coaxial cable. A dedicated
monitor displays the video from a single camera input only. Compare with switching
monitor.
dual display Two or more alarm camera scenes are displayed on the two monitors with which
they are associated. The two monitors are defined, respectively, as the hold monitor,
and the sequence monitor. The hold monitor displays the first alarm received. All
subsequent alarms are queued for display on the sequence monitor. When an alarm
scene is cleared from the hold monitor, it is replaced by the alarm scene previously
displayed on the sequence monitor. The sequence monitor then displays the next
scene in its queue.
dwell time The amount of time an individual camera scene is displayed on a monitor screen
before being replaced by the next scene in sequence.
E
event timer A programmable time slot which associates tours, monitors, and alarm contact
tables with specific times of day and specific days of the week. 35 event times are
available in the AD168 system.
F
fixed camera A camera which views a scene from a single perspective. A fixed camera cannot
pan or tilt, or make automatic lens adjustments.
flip To instantaneously position a dome 180° in the opposite direction of where it is
currently pointing.
focus The process of adjusting the clarity of a scene or an object, as seen through a
camera.
H
hold queuing The first alarm camera scene displayed on its associated monitor is held there until
the alarm is cleared. Subsequent alarms are queued behind the first alarm, pending
its clearance. As each displayed alarm is cleared, the next scene in queue takes its
place on the monitor display.
I
input A device such as a door contact, a smoke detector, or a twilight sensor, that, when
configured to do so, can activate an alarm when it undergoes a change of state.
instant clearance Automatically clears the alarm camera scene immediately after the associated alarm
contact is reset at its resource location (this entails opening or closing a switch, and
can be as straightforward as closing an opened door).
iris The camera component that determines how light enters the camera. By adjusting
the iris, you can adjust the brightness and darkness of the video on the monitor.