The effectiveness of the CCTV system compared with its low investment cost attests to its widespread use. This chapter provides design guidelines and hardware information, specific case studies, and a checklist for representative security applications. The institutions, facilities, and surveillance areas cover a wide range. With respect to contamination of the signal cable by power-line voltage transient surges, the signal and power cables use separate shielded cables or conduits to avoid this problem. A general practice is to shield the signal cables with solid foil or stranded shielding to prevent external electrical noise from reaching the signal cable conductors. In larger Home Security Cameras installations, the security equipment is powered with a parallel network. In more complex installations where several parallel power-line paths are used, or where equipment is located in different buildings or receiving power from different parts of the electric utility grid, the voltages may vary appreciably between different power distribution lines. There is a choice of AC or DC power in the form of power line, power converters, batteries, and solar panels for powering all equipment necessary for any CCTV security application.
Distribution and ground loop problems should not be attacked with “black magic” fixes because these solutions tend to be temporary, and often create other chronic problems. A thoughtful examination of each current-demanding element in the system and its effect on the overall distribution network is far more valuable than a dozen quick fixes. Improper grounding and shielding of power and signal lines is a major cause of noise interference in sensitive electronic equipment. Improper grounding occurs primarily because equipment designers often forget that every conductor to ground has resistance, inductance, and shunt capacitance. Moreover, when the ground conductors form so-called ground loops, they can inject, radiate, or pick up both low- and high-frequency interference. agencies, (2) retail stores, (3) correctional institutions. banking facilities, and (5) lodging and casino establishments. When designing a Wireless Home Monitor , the equipment chosen depends on whether it will be used indoors or outdoors. In indoor applications such as lobbies, stairwells, stockrooms, elevators, or computer rooms, minimum environmental protection is required. The equipment may be required to operate under wide variations in light level if it is to be used for daytime and nighttime surveillance.
All the previous chapters have served as a basis for understanding the design requirements and hardware available to implement a practical CCTV security system. This chapter defines the hardware required and questions to ask (which must be answered) for several real cases. Each case states the problem and provides the information leading to a solution. A layout of the security problem identifies equipment locations and system requirements. A detailed block diagram serves to identify the functions, define the hardware requirements, and uncover potential problems. Each case solution includes a bill of materials (BOM) to define and choose the hardware. The BOM also serves as a basis for a request for quotation or a quotation from a vendor. GSM Security Alarm Camera is used extensively to train security personnel in all aspects of security. It is a convenient, cost-effective, and powerful visual tool to acquaint new personnel with the physical facilities, the management, security, and safety procedures. An ingredient in the successful implementation and effective operation of any security system is a professional installer or installing company, as well as continued maintenance of the system.
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