UFC 4-021-02NF
27 September 2006
change 1, 23 October 2006
Figure 4-8. PTZ Sweep Range
Table 4-2. Fixed versus PTZ Cameras
Video
Intruder
Pre-alarm
Motion
Tracking
Applications
Cost
Review
Detection
Capability
Fixed assets
Lower
Recommended Recommended None
Fixed
such as doors,
entry gates, and
loading docks
Open areas,
Three times
Poor
Poor
Good
PTZ
more
fencelines
application
application
expensive than
a fixed camera
4-6.6
Dome Cameras. Dome cameras are actually a cheaper version of the PTZ
camera when the total cost is considered (installation, parts, and maintenance). Dome
cameras are mounted in a hardened plastic lower-dome, which is commonly smoked-
colored to conceal the camera. The use of smoke-colored domes provides covert lens
positioning, while the use of clear domes provides for better low-light performance.
Dome cameras are a good design solution for applications where the camera needs to
be protected from the environment (such as dust) or it is desired to conceal the axis and
field-of-view for a scanning camera. A common application of dome cameras is in office
buildings with suspended ceilings. The dome camera is more aesthetic and less "harsh"
looking than a camera unit. Improvements in product design have reduced the packing
to integral units that now fit in the space of a quarter ceiling tile. PTZ features within
dome cameras move substantially quicker than conventional cameras with a separate
PTZ drive unit on them.
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