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In this introduction we
would like to supply some useful preliminary information about how speed
dome cameras work.
Power supply and video signal
Speed dome cameras can be powered at 12VDC like all DSE cameras. The video signal is also standard PAL video and can be connected to any DVR or monitor.
Pan Tilt Zoom
Speed dome cameras are mounted on a Pan Tilt unit with DC motors that is able to move the camera
horizontally (PAN) or vertically (TILT).
The control of the Pan Tilt
head requires 2 additional wires, not requested by normal cameras. This must be a twisted pair because the signal is a serial BUS RS485 and is supposed to connect all speed dome
cameras and control keypads in series. Each camera is identified by an individual ID so that
can be controlled independently.
Control
All DSE High Speed Dome cameras can be controlled vie the control keypad with joystick and push-buttons.
the communication protocol used to control all DSE cameras is the popular PELCO-D, today's most common protocol in the speed dome market.
DSE digital videorecorders and
DVR PC boards can control speed dome cameras
without the need of keyboard. Using these DVR's the user can even
control the speed dome from remote PC and mobile phones.
If you wish to make your speed dome directly connectable to a LAN like an IP camera you can connect it to an
IP video server.
Speed
All DSE cameras are High Speed Dome because they
move up to 300°/sec. Please understand the difference with medium
and low speed dome.
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