Avaya Canada NT1900FRM CDMA Metrocell BTS User Manual 1900 User mif

Avaya Canada Corporation CDMA Metrocell BTS 1900 User mif

Document with the title Outdoor Cell Site Requirements

ProprietaryFCC ID AB6NT1900FRMExhibit EUser Documentation
ProprietaryNORTEL CDMA METRO CELL(MetroDE -- MetroRE)800/1900 MHzOutdoor Cell Site Requirements Issue 0.02Document: NORTEL CDMA Metro Cell (MetroDE -- MetroRE)Cell Site RequirementsFebruary, 2001NORTEL Wireless NetworksCDMA BTS Radio DevelopmentBTS Radio Systems 2M41Security Warning:The information contained in this document is the property of Northern TelecomLtd. The holder of this document shall keep all information contained hereinconfidential and shall protect the same in whole or in part from disclosure anddissemination to all third parties.
METRO CELL OUTDOOR (DE/RE) CDMA BTS RADIO DEVELOPMENTPROPRIETARY CELL SITE REQUIRE-Feb. 2001 - 2 - Issue 01 Stream 00Table of ContentsTable of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21.0 Executive Summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42.0 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53.0 Environmental Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64.0 Mechanical Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74.1 Physical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74.2 Digital Enclosure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74.3 Digital Enclosure Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74.4 External Battery Cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84.4.1 FRM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114.5 General Cabinet Anchoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114.6 Pad mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .114.7 Rubber Isolation Pad. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115.0 AC Power Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .125.1 Power Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .125.2 AC Power Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126.0 RF Overlay Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136.1 Cable Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137.0 GPS Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .158.0 Connections and Cabling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208.1 FRM Power Connections and Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .208.2 FRM Interconnect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208.3 Fiber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .219.0 T1/E1 Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2210.0 Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2510.1 BTS grounding Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2510.2 Antenna Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
METRO CELL OUTDOOR (DE/RE) CDMA BTS RADIO DEVELOPMENTPROPRIETARY CELL SITE REQUIREMENTS Issue 01 Stream 00 - 3 - Feb. 200110.3 Radio rack Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2510.4 Site Ground Ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2511.0 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
METRO CELL OUTDOOR (DE/RE) CDMA BTS RADIO DEVELOPMENTPROPRIETARY CELL SITE REQUIRE-Feb. 2001 - 4 - Issue 01 Stream 001.0 Executive SummaryThe CDMA Outdoor Metro Cell is a new product development for Nortel’s wireless mar-kets in North America. Metrocell targets the high capacity market. This document details cell site requirements for the Outdoor CDMA Metro Cell product. The Metro Cell can be configured in a 800 MHz, 1900 MHz, or mixed frequency variants. The document addresses initial deployment requirements and also covers future expansion require-ments.
METRO CELL OUTDOOR (DE/RE) CDMA BTS RADIO DEVELOPMENTPROPRIETARY CELL SITE REQUIREMENTS Issue 01 Stream 00 - 5 - Feb. 20012.0 IntroductionThis document outlines the cell site engineering requirements for the CDMA MCBTS1900 System. Its intended audience is the cell site engineering team who will use thisinformation on the capabilities of the MCBTS to plan the installation of the product at acell site. the cell site engineering team should have expertise in mechanical, grounding,power, telecom and RF engineering.Specifications in the Product Specification |agreement (PSA) shall take precedenceover information in this document.The MCBTS cell site requirements fall into six main categories:• mechanical requirements• grounding requirements• power requirements• signal interface requirements• antenna requirements• carrier requirementsThe mechanical requirements cover the physical characteristics (weight, size), themounting requirements and restrictions, and the shipping, hoisting, and liftingrequirements of the Digital Enclosure/Rack and the Radio Frequency modules (RFM)The MCBTS (Metrocell) will be deployed in a number of environments potentially bothindoors and outdoors.
METRO CELL OUTDOOR (DE/RE) CDMA BTS RADIO DEVELOPMENTPROPRIETARY CELL SITE REQUIRE-Feb. 2001 - 6 - Issue 01 Stream 003.0 Environmental RequirementsThe external environmental operating condition requirements are described in thissection. Table 3.1: list the MCBTS thermal ratings.Table 3.1: MCBTS Thermal ratingThermal Rating RangeOperating Range: (Normal operation - 24 hours per day)-40 deg.C to +50 deg.C-40 deg.F to +122 deg. FNon Operating Range: (Storage) for 72 hours -50 deg.C to +70deg.C-58 deg.F to +158 deg. F
METRO CELL OUTDOOR (DE/RE) CDMA BTS RADIO DEVELOPMENTPROPRIETARY CELL SITE REQUIREMENTS Issue 01 Stream 00 - 7 - Feb. 20014.0 Mechanical Requirements4.1 Physical SpecificationsThe MCBTS is comprised of a digital enclosure (DE) and radio frequency modules(FRM). The digital enclosure is designed to be mounted on the ground while the FRMsare designed to be installed in the radio enclosure (or radio rack).4.2 Digital EnclosureThe DE is the main structural component in the MCBTS. The digital enclosure willhouse the rectifiers, equipment shelves, internal heating/cooling tray, heat exchangerinternal loop fan assembly and provide for all necessary internal cable routingmanagement.The preliminary outside dimensions for the DE are illustrated below. These dimensionsrefer to the unpackaged height and are excluding the DEI which attaches to the left sideand the heat exchanger which mounts on the top.The dimensions are:• Depth: 30”• Height: 57” Max (excluding 15” high heat exchanger) • Width 30”The DE with no shelves will weigh an estimated 190 lbs.4.3 Digital Enclosure InterfaceThe Digital Enclosure Interface (DEI) for the MCBTS enclosure assembly providesentrance of the AC power, network and alarm connections, and connection to theground ring. The dimensions of the DEI are shown below.The dimensions are:• Depth: 30” (same as overall depth of Digital Enclosure)• Height: 72” • Width 12”The weight of the empty DEI is estimated to be 225 lbs. The loaded module weight afterintegration of equipment is expected to be 700 lbs. Cable access to the DE is via DEinterface (DEI).
METRO CELL OUTDOOR (DE/RE) CDMA BTS RADIO DEVELOPMENTPROPRIETARY CELL SITE REQUIRE-Feb. 2001 - 8 - Issue 01 Stream 004.4 External Battery CabinetThe MCBTS external battery cabinet (EBC) is an optional stand alone enclosure thatprovides additional battery backup to the digital enclosure. It will be located adjacent tothe DE at the installation site and allow for one additional EBC to be daisy chainedtogether to provide additional battery backup.The EBC utilizes the DE as its external enclosure for environmental protection. fourlifting eyes are provided at the top of the EBC for installation at the cell site.
METRO CELL OUTDOOR (DE/RE) CDMA BTS RADIO DEVELOPMENTPROPRIETARY CELL SITE REQUIREMENTS Issue 01 Stream 00 - 9 - Feb. 2001
METRO CELL OUTDOOR (DE/RE) CDMA BTS RADIO DEVELOPMENTPROPRIETARY CELL SITE REQUIRE-Feb. 2001 - 10 - Issue 01 Stream 00
METRO CELL OUTDOOR (DE/RE) CDMA BTS RADIO DEVELOPMENTPROPRIETARY CELL SITE REQUIREMENTS Issue 01 Stream 00 - 11 - Feb. 20014.4.1 FRM The FRM is illustrated in Figure xyz. Each FRM consists of the following main components: duplexer pre-selector module (DPM) or triplexer module, transmit receive module (TRM), power amplifier module (PAM) and fan/plenum assembly. The alarm indicator module (AIM) is located within the fan unit housing. The PAM, TRM, and fan unit have the same mechanical dimensions for both 800 MHz and 1900 MHz configurations. The 800 MHz DPM is taller than the 1900 MHz DPM..4.5 General Cabinet AnchoringThe DE is designed to be hoisted by a crane. Four mounting points are provided on thetop of the cabinet for hoisting.4.6 Pad mountingThe MCBTS shall be mounted on a concrete slab4.7 Rubber Isolation PadThe DE shall be mounted on a rubber pad.
METRO CELL OUTDOOR (DE/RE) CDMA BTS RADIO DEVELOPMENTPROPRIETARY CELL SITE REQUIRE-Feb. 2001 - 12 - Issue 01 Stream 005.0 AC Power Requirements5.1 Power SpecificationsCommercial AC power will be supplied to the DE as a single/split-phase, 120/240 Vac nominal, or 120/208 nominal Vac two of three phases, four conductor (L1, L2, Neutral and Ground) connection from an external service entrance.The DE ac power input requirements are as follows:• Nominal Input Voltage: 240/120 Vac, single, split phase, 50/60 Hz• Input Voltage Range: 178 to 264 Vac• Input Frequency: 47 - 63 Hz• Power factor: greater than 90% at nominal line voltage and frequency • Input current rating 70A, 2-pole circuit breaker5.2 AC Power ConnectionAll external AC power enters the system via the AC panel in the DEI. Primary power is byconnection to the AC utility. A four wire (L1, L2, Neutral, and ground), nominal 240/120V (or 208/120V), 100A rating, ac supply must be supplied by the customer. The main breaker from the customer supply should be 100A. If the DEI is to be the service entrance, the neutral-groundjumper in the ac panel should be connected. Otherwise, it should be removed.Auxiliary AC power access is via the external AC generator receptacle connector. .
METRO CELL OUTDOOR (DE/RE) CDMA BTS RADIO DEVELOPMENTPROPRIETARY CELL SITE REQUIREMENTS Issue 01 Stream 00 - 13 - Feb. 20016.0 RF Overlay RequirementsThe Metro Cell has several overlay options Basic installation configuration (single channel)Simple overlay or mini configuration The Metro Cell can accommodate 1900 MHz FRM’s, 800 MHz FRM’s, or combinations of both.The FRM is illustrated in Figure 16. Each FRM consists of the following maincomponents: duplexer pre-selector module (DPM) or triplexer module, transmit receivemodule (TRM), power amplifier module (PAM) and fan/plenum assembly. The alarmindicator module (AIM) is located within the fan unit housing. The PAM, TRM, and fanunit have the same mechanical dimensions for both 800 MHz and 1900 MHzconfigurations. The 800 MHz DPM is taller than the 1900 MHz DPM.The minimum requirement (1 carrier) is 2 antennas per sector, one for the main path (Tx and one diversity path) and one for the other diversity path. A two carrier system can also be supported with two antennas. In this case, each antenna carries one carrier on the Tx side and one diversity path on the Rx side. With a three carrier system, a third antenna is added to carry just the Tx of the third carrier6.1 Cable ConnectionsThe optical link cable, SFRM DC power cable and the GPS antenna cable have aprovisionable length. When ordering, the length must be specified and fall below themaximum length specifications indicated.The quantity of inter-DFRM cables required depends upon the application. In a singlecarrier system, no inter-SFRM cables are required. In 2 or 3 carrier systems, inter-SFRM cables are required.Two sample configurations will be considered for illustrative purposes. These are:Table 6.1: Number of CarriersNumber of Antennas per Sector122233
METRO CELL OUTDOOR (DE/RE) CDMA BTS RADIO DEVELOPMENTPROPRIETARY CELL SITE REQUIRE-Feb. 2001 - 14 - Issue 01 Stream 00i) a basic system with no redundancy;ii) a premium system with all redundancy
METRO CELL OUTDOOR (DE/RE) CDMA BTS RADIO DEVELOPMENTPROPRIETARY CELL SITE REQUIREMENTS Issue 01 Stream 00 - 15 - Feb. 20017.0 GPS ReceiverTiming and frequency reference information provided by the GPS receiver is critical tothe proper operation of Metrocell subsystem. One or two GPS antennas may beconnected. The GPS antenna receives the signals from multiple satellites, and thesignal is supplied to the GPS receiver in the Metrocell via a coaxial cable. Precautionsshould be taken to ensure that the GPS antenna is clear of obstructions andinterference.The antenna should be installed to provide the best view of the entire sky. A completeview of the sky from horizon to horizon will enable the receiver to observe as many GPSsatellites as possible. This allows the GPS receiver to select the best combination ofGPS satellites for best performance. If the GPS antenna must be installed with a limitedview of the sky, it may not be able to track a sufficient number of satellites to determineits position. The GPS receiver must track at least 4 satellites simultaneously for someperiod of time in survey mode. Once the GPS receiver has an accurate fix on itslocation, it can maintain accurate timing signals to the BTS while tracking only onesatellite.The maximum distance between Metrocell and GPS antenna is set by the maximumallowable cable loss of? dB. The cable length and type is required by the GPS receiverfor determining the delay from antenna to the receiver.
METRO CELL OUTDOOR (DE/RE) CDMA BTS RADIO DEVELOPMENTPROPRIETARY CELL SITE REQUIRE-Feb. 2001 - 16 - Issue 01 Stream 00Connections and Cabling
METRO CELL OUTDOOR (DE/RE) CDMA BTS RADIO DEVELOPMENTPROPRIETARY CELL SITE REQUIREMENTS Issue 01 Stream 00 - 17 - Feb. 2001
METRO CELL OUTDOOR (DE/RE) CDMA BTS RADIO DEVELOPMENTPROPRIETARY CELL SITE REQUIRE-Feb. 2001 - 18 - Issue 01 Stream 00
METRO CELL OUTDOOR (DE/RE) CDMA BTS RADIO DEVELOPMENTPROPRIETARY CELL SITE REQUIREMENTS Issue 01 Stream 00 - 19 - Feb. 2001
METRO CELL OUTDOOR (DE/RE) CDMA BTS RADIO DEVELOPMENTPROPRIETARY CELL SITE REQUIRE-Feb. 2001 - 20 - Issue 01 Stream 008.0 Connections and Cabling8.1 FRM Power Connections and CablesDC power is conducted to individual FRMs via two conductor (-48V, BR) shielded(ground) cables, one cable for each FRM. The size of the power cable depends on thecable run length. The DC power cable from DEI enters the FRM enclosure via thePower Entry Module (PEM)The specifications for these external FRM dc cables are as follows:• less than 3000 feet, use 2 conductor #8 AWG shielded cable• Between 300 and 600 feet, use 2 conductor #6• Allowed cable voltage drop: 6 Vdc maximum (-48V and Rtn combined)• Cable terminations: two-hole lugs at the DEI BRR plate, twist-lock type connector at FRM (to mate with the PEM)• Shield termination: grounded at both the FRM and DEI ends, and at the base of the tower The FRM DC cable is sized for voltage drop, not ampacityThe optical link enters the FRM via the electro-optic module (EOM)8.2 FRM InterconnectTable 8.1 next shows the FRM external interconnect single carrier configuration.
METRO CELL OUTDOOR (DE/RE) CDMA BTS RADIO DEVELOPMENTPROPRIETARY CELL SITE REQUIREMENTS Issue 01 Stream 00 - 21 - Feb. 20018.3 FiberThe optical link to the FRM contains 4 fibers per link. two receive and transmit pairs forredundancy, unless multi carrier deployment is used, when soft redundancy is handledby the other carrier and only two fiber are used (other two left unused). The main portionof the link will run on outside plant cable capable of vertical ascent, terminated at theFRM by a standard SIECOR optifit termination. The transceivers will be housed in aheated optical termination unit which is connected to the FRM by electrical interconnect.The high speed signals will be carried by 4 coaxial links.Fiber interconnect and rearrangement features are required to interconnect the FRMs tothe Digital enclosure. Current baseline design has the digital enclosure provisioned witha optical link harness, fiber storage and management, as well as flexibility point (splicepoint) in the DEI cabinet capable of handling all 48 fibers in the fully configured case.The FRM has an EOM which depends upon the length of the fiber run from the DE tothe FRMTable 8.1: FRM InterconnectName Type Format # Pins From To NoteE-pwr/ret 48VDC DC 2 DEI FRM E_ in the name E_gnd GND GND 1 DEI FRM designates a E_shield GND GND 1 DEI FRM connectionE_rfm_rvs1 639.976 Mbs optical 1 EOM COR1 external to theE_rfm_fwd1 639.976 Mbs optical 1 COR1 EOM FRM assemblyE_rfm_rvs2 639.976 Mbs optical 1 EOM COR2E_rfm_fwd2 639.976 Mbs optical 1 COR2 EOM
METRO CELL OUTDOOR (DE/RE) CDMA BTS RADIO DEVELOPMENTPROPRIETARY CELL SITE REQUIRE-Feb. 2001 - 22 - Issue 01 Stream 009.0 T1/E1 ConnectionsThe CM module has up to 6T1 interfaces connected through the backplane. The cablewill probably be lumped in two 12 wire bundles terminated at the digital shelf backplaneby two 15 pin dsubs.The Metro Cell can be connected to the BSC using 1 to 6 T1/E1 links. These T1/E1links are distributed between the two DCGs i.e. if one DCG has 4 T1/E1s connected to itthen the other can have a maximum of two T1/E1 links. All T1/E1s connected to eachDCG need to have the same timing reference at the BSC. Each link requires 2 twistedpairs.There are two ways of connecting T1/E1 to the Metro Cell. The T1/E1 cables can bedirectly brought into the DEI or they can be connected to a RJ48H connector whichinterfaces with the DEI. The RJ48H connector cable NTGS0106 is provisionable. In theDEI T1/E1 connections are done on the middle and lower blocks among the threeTelephone/Data Line Protection blocks as shown in Figure 87. The RJ48H connector isshown in Figure 88 and the pinout is shown in Table 30.The number of T1/E1s that need to be connected to the Metro Cell depends on the callcarrying capacity of the T1/E1s and the number of calls that a Metro Cell has to make.The number of T1/E1 that need to be provisioned for a Metro Cell can be determinedfrom Ref [10].The two modes of operation of Metro Cell are regular (or non-split) mode or split mode.In the regular mode only one DCG is active, the other DCG may not be provisioned or isa redundant DCG. In the split mode both DCGs are provisioned and are active. EachDCG in the split mode is a logical BTS. The T1/E1 connections of the Metro Cell in theregular and split mode are done as shown in Table 27.The T1/E1 lines are connected to one of the two BTSI cards in the control module (CM)
METRO CELL OUTDOOR (DE/RE) CDMA BTS RADIO DEVELOPMENTPROPRIETARY CELL SITE REQUIREMENTS Issue 01 Stream 00 - 23 - Feb. 2001Table 27: T1/E1 Connections of Metro Cell without Daisy ChainingThe T1/E1 lines are connected to one of the two BTSI cards in the control module (CM)which forms part of the DCG. The connections are controlled by relays and are exclusiveto one DCG. Therefore if T1/E1 #1 is connected to the first DCG then the same linescannot be connected to the other DCG. This is true in regular as well as split mode. Inregular mode since only one DCG is active, therefore, all the T1/E1s are connected tothe active DCG. When the redundant DCG takes over then the connections are switchedto it by closing the relays on this new active DCG and opening them on the previouslyactive DCG. The middle column of Table 27 shows how the T1/E1 connections are donefor the active DCG in regular mode. In the split mode each DCG is active and is part ofthe logical BTS. Therefore, each DCG has its own independent T1/E1 connections. Theright column of Table 27 shows how the T1/E1 connections are done for the two logicalBTSs in the split mode. It is clear from [1] that a single DCG, supporting a maximum oftwo carriers, does not need more than 3 T1/E1 connections. So, the connections shownin Table are reasonable and will provide for a redundant T1/E1 link per logical BTS inmost cases (keeping in mind the number of T1/E1 links needed for 2 carriers asmentioned in [10]).The Metro Cell can be configured for a shorthaul link or a longhaul link. In case of ashorthaul configuration the Metro Cell should be within 655ft of the last repeater while fora longhaul link the Metro Cell should be within 6000ft of the last repeater using 22 gaugeunshielded twisted pair cable i.e. 100 ohm 22 gauge cable. The shorthaul and longhaullink is configured using software. The distance of the Metro Cell from the last repeater-
METRO CELL OUTDOOR (DE/RE) CDMA BTS RADIO DEVELOPMENTPROPRIETARY CELL SITE REQUIRE-Feb. 2001 - 24 - Issue 01 Stream 00has to match the software configuration.
METRO CELL OUTDOOR (DE/RE) CDMA BTS RADIO DEVELOPMENTPROPRIETARY CELL SITE REQUIREMENTS Issue 01 Stream 00 - 25 - Feb. 200110.0 Grounding10.1 BTS grounding ArchitectureThe FRM is grounded to its mounting structure, whether a tower, wall, building or pole.for outdoor Metrocell or the radio rack (Indoor Metrocell). If the structure is non-conductive (e.g. wooden pole) it shall be provided with a ground cable as part of the siteground.The FRM mounting structure and BTS cabinets both connect to the site ground ring. #2AWG cables less than ten feet long are used for these primary, external groundconnections.10.2 Antenna GroundingEach GPS antenna will be grounded at the antenna mast and again at the cable entrypoint (coax cable shield) inside the DEI. Similarly, the cell site antenna(s) are groundedat the tower and may be further protected by lightning rods on the mounting structure,protruding above the antennas, preventing direct strike to the.10.3 Radio rack Grounding The common ground point in the RE is the subframe. A #2 AWG cable will connect thesubframe to the main ground point in the DEI in the side-by-side configuration. When theRE is installed remotely from the DEI/DE the ground cable will connect the subframe tothe site ground in that area. Attachment shall be made with two hole compression lugs.The shield of the DC power cable connecting the main electronics cabinet to the FRMshall be grounded at both the FRM end and the main enclosure end (main ground plate).Provision one NTGS0161 main site ground cable for the DEI/DE and one for every RE.10.4 Site Ground RingA peripheral grounding ring, usually buried around the site perimeter, or routed alongthe outer edge of the roof of a building, provides the main site ground. It provides anequipotential reference to minimize differential voltages during lightning surges. Itconsists of a #2 AWG (or larger) uninsulated, tinned copper conductor. Connections aremade to it using C-tap clamps.
METRO CELL OUTDOOR (DE/RE) CDMA BTS RADIO DEVELOPMENTPROPRIETARY CELL SITE REQUIRE-Feb. 2001 - 26 - Issue 01 Stream 00The ground ring makes earth contact through ground electrodes, typically copper-cladstakes 3m (10 ft.) long, driven into the ground at 2.5 to 3m (8-10 ft.) intervals around theground ring and tower, and welded to it. The resistance to earth of the ground ring shallbe 25 ohms or less, with a preferred value of less than 5 ohms. See Nortel CS4122.00and DSAP65BA (Cell Site Power and Grounding) for further information._____________________Fig. 10.1 Cell Site Grounding Connections
METRO CELL OUTDOOR (DE/RE) CDMA BTS RADIO DEVELOPMENTPROPRIETARY CELL SITE REQUIREMENTS Issue 01 Stream 00 - 27 - Feb. 200111.0 References [1] CMS-MTX/CDMA MCBTS 1900 Outdoor and MCBTS Base Platform. ProductSpecification Agreement. by Neil McGowan and Frank van Heeswyk.[2] CDMA MCBTS 1900 Outdoor. Power Protection and Grounding Design Specification.by Ed Norman.[3] CDMA MCBTS 1900 Outdoor. General Specification.[4] MCBTS 1900 MHz Radio Enclosure System Packaging Specification. by Fred Folk.[5] MCBTS Optical Link NTGS05AA, NTGS0117, NTGS0095 Functional Agreement.Packaging Concepts Methodology.[6] MCBTS Digital Enclosure Mechanical Assembly NTGS13AA Functional Agreement.Packaging Concepts Methodology._____________________

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