use PL-type fittings or connectors, properly protected against moisture.
Cables shall match output impedance of transmitters.
2.4.17
Closed-Circuit Television (CCTV) System
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NOTE: Scene illumination shall be even across the
field of view of the camera, with a maximum light to
dark ratio of 8 to 1. Minimum illumination level
shall be 11 lux one footcandle.
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NOTE: For visual assessment of IDS alarms, specify
the optimum number of monitors for the number of
cameras required. It is difficult to view and
respond to too many monitors. Typically, for six
cameras or less, use one monitor per camera. For a
larger number of cameras, consider sequential
switchers, four quadrant multiplexers, or a
combination of both.
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Provide CCTV components to provide visual assessment of IDS alarms.
Subsystem shall continuously view remote areas with video cameras and
display the areas automatically upon IDS alarm, or upon operator selection.
Provide the number of alarm monitors indicated. Video switcher shall be
capable of automatic and manual operation. Alarm monitors shall display
alarm areas only when an alarm condition exists. In systems where monitors
may display more than one camera scene, provide on-screen camera
identification. Subsystem shall be composed of components which are
integrated to provide a quality video system. The scene from each camera
shall appear clear, crisp, and stable on the respective monitor during both
daytime and nighttime operation. Horizontal resolution shall reflect
quality video components, and system shall have a minimum of 5 MHz
bandwidth. Component equipment shall minimize both preventive and
corrective maintenance. Components shall be compatible with other
components and with system as a whole and shall, to the greatest extent
possible, be supplied by the same manufacturer.
2.4.17.1
Cameras
a.
Except as specified herein, CCTV camera shall comply with SMPTE
170M for standard monochrome camera and shall:
(1) Consist of support structure, base plate, lens plate, [image
sensor,] and printed circuit boards with electronic components;
(2) Be identified with the manufacturer's part number, model
number, lens installed, and a serial number;
(3) Operate over a voltage range of 105 to 130 volts ac or low
voltage ac at 60 Hz;
(4) Have electronic circuits which use solid-state devices. When
object distance resolution is acceptable, a solid-state imaging
device may be used;
(5)
Be constructed to provide rigid support for electrical and
SECTION 13703N
Page 46
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