Rapid Eye Remote Video Unit Installation and Setup Guide
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Appendix C: Common CCTV Practices
C.3.3 Recommendations
The following recommendations should achieve noise-free CCTV
performance:
•
Make sure that the BNC connectors are firmly attached by using
solder or crimp-on connections. Do not use BNC screw-on type
connectors.
•
Equipment chassis and cable shields should never be used for signal
path returns (with the exception of coaxial cable).
•
Signal circuits should use balanced cable (for example twisted pair,
shielded, or balanced coaxial cable).
•
Individual shields of balanced coaxial cable, when contained by a
common shield, should be insulated from one another and insulated
from the common shield.
•
Do not bundle cables carrying high-level signals with cables
carrying low-level signals.
•
Each signal line should have its own independent return line running
as close as possible to the signal line.
C.4 Backup Power
It is important to consider how possible AC or DC power failures will affect
the CCTV system. Should the system fail due to electrical problems such as
noise, electrical dips and surges, line spikes, power degradation, or
brownout, there will be no security at all.
It is important to identify whether part or all of the CCTV system is to be
protected from power interruptions.
To prevent the above electrical disturbances, sensitive devices such as
computers, video equipment, or telecommunications equipment are never
connected directly to raw power. An uninterruptible power source (UPS) is
connected in the power line between the source power and the equipment.
The UPS provides line conditioning and filtering, and delivers continuous
uninterrupted power at all times, even during complete blackouts.
