standards and guidelines for communication sites - Radio And ...

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GLOSSARY CHAPTER 1: INTRODUCTION CIU: Console Interface Unit. CO: Central Office. Combiner: A passive device that allows transmitters on different frequencies to use a single antenna. Console: A system's dispatch electronics, made up of one or more console operator positions and a Central Electronics Bank (CEB). Console Interface Unit: An interface device that provides encryption/ decryption of console audio signals. Conventional system: A radio system in which resources are dedicated to a specific frequency. CPR: Cardio-Pulmonary Resuscitation. Critical Loads: Devices and equipment whose failure to operate satisfactorily jeopardizes the health or safety of personnel, and /or results in loss of function, financial loss, or damage to property deemed critical by the user. CSA: 1) Abbreviation for Canadian Standards Association. 2) Cross-sectional area (as used for cable gauge specification in metric system). CSI: Construction Specification Institute. CSU: Channel Service Unit. Daisy chain: Any method of connection whereby the conductors are connected from one chassis, equipment frame or rack connection point to a second chassis, equipment frame or rack connection point and on to a third connection point, creating a series arrangement whereby the removal of the second connection point interrupts the ground path from the first chassis, equipment frame or rack. Daisy chaining of grounding conductors is not an acceptable method of connection. Demarcation Point: The telephone or utility point of presence at a facility which divides utility assets from customer assets and accordingly assigns maintenance responsibilities. Dip: See “Sag.” Dip is the International Electrotechnical Commission (IEC) term for sag. Distortion: Any deviation from the normal sine wave for an AC quantity. DOT: Department of Transportation. Duplexer: An RF filtering system that separates the transmit and receive frequency, so that equipment can transmit and receive simultaneously on a single antenna, without affecting other equipment. DVM: Digital Voltmeter. E-1: A time division multiplex (TDM) digital link which uses 32 time slots with a speed of 2.048Mb/s Earth; Earthing: Synonymous with ground; grounding. EAS: Environmental Alarm System. Easement: An interest in real property which is owned by another that entitles the holder to a specific limited use or enjoyment of the owner's property. EBTS: Enhanced Base Transceiver System. Effective Radiated Power: The near-field radiated effective power (as opposed to peak envelope power) of a transmitting antenna. Specifies power radiated less any losses inherent in transmission lines or antenna coupling. EGB: External Ground Bus Bar. 1-14 68P81089E50-B 9/1/05
STANDARDS AND GUIDELINES FOR COMMUNICATION SITES GLOSSARY EHS: Environmental Health and Safety. EIA: Electronics Industries Association. Electrolytic ground rods: Ground rods in which the ability to dissipate charge is enhanced by chemical reaction with the soil. Electrical Metallic Tubing: Describes conduit tubing used specifically for housing electrical conductors. Several variations are available for specific purposes. Electrostatic Discharge: A high voltage, low current electrical discharge caused by buildup of static charge between two surfaces. EME: Electromagnetic Energy. EMT: Electrical Metallic Tubing. Enhanced Base Transceiver System: Base stations used in the iDEN system. Environmental Alarm System: Equipment which centrally receives, interfaces, and processes remote alarms related to equipment environmental conditions and other switch-closure alarms. ERP: Effective Radiated Power. ESD: Electrostatic Discharge. Ethernet: A Local Area Network (LAN) protocol. ETSI: European Telecommunications Standards Institute. Exothermic welding: A process by which two pieces of metal are permanently welded using heat generated by a chemical reaction caused by combining the welding materials. External Ground Bus Bar: A ground bus bar that provides a bonding point for multiple grounding conductors (such as all coaxial connections) and connection to the grounding electrode system. External grounding system test: A test that measures the effective resistance of the external site grounding system. External site grounding ring: A ring of conductor wire surrounding an equipment enclosure, building and tower at a communications site. The grounding ring is bonded to the grounding electrodes, so that electrical charges are ultimately dissipated by the earth. FAA: Federal Aviation Administration. Fair Market Value: The approximate worth of a piece of property, based on several factors including location and the actual selling price of similar properties in the area. Facility: A complete site environment, including power system(s), site structure, HVAC system, antenna structure, and boundary fencing (if applicable). Failsoft: A default communication mode for trunking systems that prevents system shutdown by providing limited communications capability during a system failure. The repeaters operate in conventional mode if the central controller fails. FCC: Federal Communications Commission. Federal Aviation Administration: The US regulatory agency responsible for air traffic safety. It also governs height and marking regulations for towers and other tall structures that could pose a hazard to aircraft. 68P81089E50-B 9/1/05 1-15
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Page 3 and 4: TABLE OF CONTENTS Chapter 1. Introd
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STANDARDS AND GUIDELINES FOR COMMUN
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CHAPTER 4 EXTERNAL GROUNDING (EARTH
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CHAPTER 5 INTERNAL GROUNDING (EARTH
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CHAPTER 6 POWER SOURCES 6 6.1 LOCKO
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CHAPTER 7 SURGE PROTECTIVE DEVICES
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CHAPTER 8 MINIMIZING SITE INTERFERE
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CHAPTER 9 EQUIPMENT INSTALLATION 9
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APPENDIX A ELECTROMAGNETIC ENERGY I
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APPENDIX B SOIL RESISTIVITY MEASURE
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APPENDIX C PROTECTING AGAINST ELECT
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APPENDIX D GROUNDING (EARTHING) ELE
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APPENDIX E GENERAL CONVERSIONS AND
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APPENDIX F R56 COMPLIANCE CHECKLIST
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I NDEX Index Index AC power cabling
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