Rapid Eye Remote Video Unit Installation and Setup Guide
Appendix C: Common CCTV Practices
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F L E X IB L E
O U T E R
JA C K E T
C O N D U C T IV E
P O LY P R O P Y L E N E
C E N T E R
C O N D U C T O R
C OA XIA L
(U N B A LA N C E D )
C O P P E R S H IE L D IN G
G R O U N D L E A D
F O A M
D IE L E C T R IC
Figure 11: Coaxial Cable Construction
Choosing a cable depends on your environment and the electrical
characteristics. Common types used are RG59/U and the RG11/U, each
having 75 ohms impedance. For short camera-to-monitor distances
(several hundred feet), preassembled or field-connected lengths of
RG59/U coaxial cable, with BNC connector at each end are used.
C.2.1 Connectors
The BNC connector is commonly used for CCTV connections because
of its small size, ease of twist-on installation, and low signal loss. The
three types of BNC connectors are solder, crimp-on, and screw-on.
C.2.2 Amplifiers
Video amplifiers are required in applications where cameras and
monitors are separated by several thousand feet. Amplifiers are located
at the camera output or along the coaxial cable run, and increase camera-
to-monitor distance to a maximum length of 3,400 feet for RG59/U
cable.
The recommended cable lengths are shown in Table 2: Maximum
Recommended Cable Lengths.
Coaxial Type
Cable Only (feet)
Cable with Amplifier (feet)
RG59/U
750 (230 meters)
3,400 (1,035 meters)
Table 2: Maximum Recommended Cable Lengths
