Avaya Canada NT800FRMA 800 MHz CDMA Flexible Radio Module for Base Statio User Manual 800 User mif

Avaya Canada Corporation 800 MHz CDMA Flexible Radio Module for Base Statio 800 User mif

Nortel CDMA Metrocell Cell Site Requirements

ProprietaryFCC ID AB6NT800FRMAExhibit EUser Documentation
ProprietaryNORTEL CDMA METRO CELL(MetroDE -- MetroRE)800/1900 MHzOutdoor Cell Site RequirementsIssue 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 REQUIREMENTSFeb. 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 REQUIREMENTSFeb. 2001 - 4 - Issue 01 Stream 001.0 Executive SummaryThe CDMA Outdoor Metro Cell is a new product development for Nortel’s wireless markets 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 requirements.
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 MCBTS 1900System. Its intended audience is the cell site engineering team who will use this information onthe capabilities of the MCBTS to plan the installation of the product at a cell site. the cell siteengineering team should have expertise in mechanical, grounding, power, telecom and RFengineering.Specifications in the Product Specification |agreement (PSA) shall take precedence overinformation 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), the mountingrequirements and restrictions, and the shipping, hoisting, and lifting requirements of the DigitalEnclosure/Rack and the Radio Frequency modules (RFM)The MCBTS (Metrocell) will be deployed in a number of environments potentially both indoorsand outdoors.
METRO CELL OUTDOOR (DE/RE) CDMA BTS RADIO DEVELOPMENTPROPRIETARY CELL SITE REQUIREMENTSFeb. 2001 - 6 - Issue 01 Stream 003.0 Environmental RequirementsThe external environmental operating condition requirements are described in this section. Table3.1: 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). Thedigital enclosure is designed to be mounted on the ground while the FRMs are designed to beinstalled in the radio enclosure (or radio rack).4.2 Digital EnclosureThe DE is the main structural component in the MCBTS. The digital enclosure will house therectifiers, equipment shelves, internal heating/cooling tray, heat exchanger internal loop fanassembly and provide for all necessary internal cable routing management.The preliminary outside dimensions for the DE are illustrated below. These dimensions refer tothe unpackaged height and are excluding the DEI which attaches to the left side and the heatexchanger 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 provides entrance ofthe AC power, network and alarm connections, and connection to the ground ring. Thedimensions 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 DE interface(DEI).
METRO CELL OUTDOOR (DE/RE) CDMA BTS RADIO DEVELOPMENTPROPRIETARY CELL SITE REQUIREMENTSFeb. 2001 - 8 - Issue 01 Stream 004.4 External Battery CabinetThe MCBTS external battery cabinet (EBC) is an optional stand alone enclosure that providesadditional battery backup to the digital enclosure. It will be located adjacent to the DE at theinstallation site and allow for one additional EBC to be daisy chained together to provideadditional battery backup.The EBC utilizes the DE as its external enclosure for environmental protection. four lifting eyesare 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 REQUIREMENTSFeb. 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/ple-num 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 the top of thecabinet 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 REQUIREMENTSFeb. 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) con-nection 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-ground-jumper 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 a provisionablelength. When ordering, the length must be specified and fall below the maximum lengthspecifications indicated.The quantity of inter-DFRM cables required depends upon the application. In a single carriersystem, no inter-SFRM cables are required. In 2 or 3 carrier systems, inter-SFRM cables arerequired.Two sample configurations will be considered for illustrative purposes. These are:i) a basic system with no redundancy;Table 6.1: Number of CarriersNumber of Antennas per Sector122233
METRO CELL OUTDOOR (DE/RE) CDMA BTS RADIO DEVELOPMENTPROPRIETARY CELL SITE REQUIREMENTSFeb. 2001 - 14 - Issue 01 Stream 00ii) 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 to theproper operation of Metrocell subsystem. One or two GPS antennas may be connected. The GPSantenna receives the signals from multiple satellites, and the signal is supplied to the GPSreceiver in the Metrocell via a coaxial cable. Precautions should be taken to ensure that the GPSantenna is clear of obstructions and interference.The antenna should be installed to provide the best view of the entire sky. A complete view ofthe sky from horizon to horizon will enable the receiver to observe as many GPS satellites aspossible. This allows the GPS receiver to select the best combination of GPS satellites for bestperformance. If the GPS antenna must be installed with a limited view of the sky, it may not beable to track a sufficient number of satellites to determine its position. The GPS receiver musttrack at least 4 satellites simultaneously for some period of time in survey mode. Once the GPSreceiver has an accurate fix on its location, it can maintain accurate timing signals to the BTSwhile tracking only one satellite.The maximum distance between Metrocell and GPS antenna is set by the maximum allowablecable loss of? dB. The cable length and type is required by the GPS receiver for determining thedelay from antenna to the receiver.
METRO CELL OUTDOOR (DE/RE) CDMA BTS RADIO DEVELOPMENTPROPRIETARY CELL SITE REQUIREMENTSFeb. 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 REQUIREMENTSFeb. 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 REQUIREMENTSFeb. 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 the cable run length.The DC power cable from DEI enters the FRM enclosure via the Power 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.8.3 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 handled by theother carrier and only two fiber are used (other two left unused). The main portion of the linkwill run on outside plant cable capable of vertical ascent, terminated at the FRM by a standardSIECOR optifit termination. The transceivers will be housed in a heated optical termination unitwhich is connected to the FRM by electrical interconnect. The high speed signals will be carriedby 4 coaxial links.
METRO CELL OUTDOOR (DE/RE) CDMA BTS RADIO DEVELOPMENTPROPRIETARY CELL SITE REQUIREMENTS Issue 01 Stream 00 - 21 - Feb. 2001Fiber interconnect and rearrangement features are required to interconnect the FRMs to theDigital enclosure. Current baseline design has the digital enclosure provisioned with a opticallink harness, fiber storage and management, as well as flexibility point (splice point) in the DEIcabinet 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 to the 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 REQUIREMENTSFeb. 2001 - 22 - Issue 01 Stream 009.0 T1/E1 ConnectionsThe CM module has up to 6T1 interfaces connected through the backplane. The cable willprobably be lumped in two 12 wire bundles terminated at the digital shelf backplane by two 15pin dsubs.The Metro Cell can be connected to the BSC using 1 to 6 T1/E1 links. These T1/E1 links aredistributed between the two DCGs i.e. if one DCG has 4 T1/E1s connected to it then the othercan have a maximum of two T1/E1 links. All T1/E1s connected to each DCG need to have thesame timing reference at the BSC. Each link requires 2 twisted pairs.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)Table 27: T1/E1 Connections of Metro Cell without Daisy Chaining
METRO CELL OUTDOOR (DE/RE) CDMA BTS RADIO DEVELOPMENTPROPRIETARY CELL SITE REQUIREMENTS Issue 01 Stream 00 - 23 - Feb. 2001The 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 repeaterhas to match the software configuration.
METRO CELL OUTDOOR (DE/RE) CDMA BTS RADIO DEVELOPMENTPROPRIETARY CELL SITE REQUIREMENTSFeb. 2001 - 24 - Issue 01 Stream 0010.0 Grounding10.1 BTS grounding ArchitectureThe FRM is grounded to its mounting structure, whether a tower, wall, building or pole. foroutdoor 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 site ground.The FRM mounting structure and BTS cabinets both connect to the site ground ring. #2 AWGcables less than ten feet long are used for these primary, external ground connections.10.2 Antenna GroundingEach GPS antenna will be grounded at the antenna mast and again at the cable entry point (coaxcable shield) inside the DEI. Similarly, the cell site antenna(s) are grounded at the tower and maybe 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 along the outeredge 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.The 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 the
METRO CELL OUTDOOR (DE/RE) CDMA BTS RADIO DEVELOPMENTPROPRIETARY CELL SITE REQUIREMENTS Issue 01 Stream 00 - 25 - Feb. 2001ground 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 REQUIREMENTSFeb. 2001 - 26 - Issue 01 Stream 0011.0 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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