Residential Security, Access Control, and Surveillance Copyright © 2005 Heathkit Company, Inc. All Rights Reserved Presentation 18 – Wireless Security Camera Systems

2 Objectives At the end of this presentation, you will be able to:

3 Compare and contrast color and monochrome security cameras and explain their advantages and disadvantages. Compare and contrast wired and wireless security cameras and explain their advantages and disadvantages. Compare and contrast audio and non- audio security cameras and explain their advantages and disadvantages.

4 The Basic Video Surveillance System Camera with lens Transmission media Monitor or recorder

5 Video Transmission Media Coaxial cable Twisted pair Fiber optic cable Phone lines Radio frequency signals

6 Coaxial Cable Most common method Simple and well supported Reliable Difficult to install Distances limited

7 Twisted Pair, part 1 Composite signals on one pair Distances limited Susceptible to interference Balanced signals No interference Very long distances Requires a balun at each end, at $20 each

8 Twisted Pair, part 2 Use an IP camera, with RJ-45 High-quality cams are expensive, webcam-types are inexpensive Requires a LAN connection Requires skill with IP and LAN traffic

9 Fiber Optic Cable Not used often Immune to RFI and EMI Immune to eavesdropping Signals carry very long distances Provides electrical isolation Relatively expensive

10 Phone Lines HomePNA Slow Webcams and IP cameras

11 RF Signals Relatively short distances Widely variable maximum distance Subject to weather and RFI and other electrical interference Easy to install

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14 Receiving Antenna

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16 Receiving Antenna Transmitting Antenna 100 Feet

17 Receiving Antenna Transmitting Antenna 250 Feet

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19 Wireless Frequency UHF ( MHz) 900 MHz 1.2 GHz 2.4 GHz 5.8 GHz

20 UHF900 MHz1.2 GHz2.4 GHz5.8 GHz ModulationAM FM RangeShort Moderate Long Penetration: WoodGreat Good Average ConcreteVery GoodGoodAverage Poor TreesGood Average

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23 Wireless Summary Easy to install Simple Wiring Subject to interference

Residential Security, Access Control, and Surveillance Copyright © 2005 Heathkit Company, Inc. All Rights Reserved End