Nortel Networks 411-2021-111 manual Sectorization, Signal RF

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List of terms xv

RMC

Receive Multicoupler. A device for amplifying the input received from a single antenna and providing multiple outputs for a group of receivers.

RSSI

Received Signal Strength Indicator. A measurement of the received RF signal strength measured at the base station or the subscriber terminal. It is expressed in dBm.

SAT

Supervisory Audio Tone. A tone of 5970, 6000, or 6030 Hz which modulates the AMPS voice channel along with voice audio. It is generated by the cell site and is repeated by the mobile back to the cell site. The repeated SAT is checked by the cellular system to confirm the continuity of the complete RF path from the cell site to the subscriber terminal and back to the cell site.

SCC

SAT Color Code. The datafill values corresponding to the various SATs: 00 for 5970 Hz, 01 for 6000 Hz, 10 for 6030 Hz.

Sector

A theoretical wedge-shaped part of the coverage area of one cell site, served by a specific group of directional antennas on specific channels.

Sectorization

A cell site configuration that consists of two or more sectors in which a different control and voice channel assignment is given for each sector. In this arrangement, the datafill and channel assignments for each sector are tailored to meet the system operational requirements, providing more flexibility in the cell site configuration compared to an omni configuration but with a decrease in trunking efficiency.

Signal (RF)

Radio frequency energy associated with a particular or desired frequency.

SINAD

A standard measurement of detected audio quality that is related to signal-to- noise plus distortion of the RF signal strength at the receiver input terminal. 12 dB SINAD is the commonly used threshold for receiver sensitivity measurements to determine the weakest-practical analog RF input, in dBm, required by the receiver. A SINAD of 20 dB is considered good quality and defines the RF input level needed to fully quiet the receiver.

S/N

Signal-to-Noise ratio. The ratio of signal power to noise power on a radio channel.

DMS-MTX DualMode Metrocell Cell Site Description

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Contents

DualMode Metrocell Page Page June Publication historyContents Appendices Power and Grounding RequirementsCell Site Components Datafilling a Metro Cell SiteList of tables Block diagram of a 120 Stsr Metrocell using one RF FramePage Intended audience for this publication About this documentApplicability of this publication How this publication is organized List of terms Band Carrier RF Duplexer CellDBm DBWLoss FilterForward path IsolationReturn loss ModulationOmni DqpskSignal RF SectorSectorization Stsr Northern Telecoms DualMode Metrocell IntroductionDigital ready cellular product System architecture of a DualMode MetrocellMetro RF Frame Basic components of a DualMode Metrocell Universal CE Frame800 MHz cellular band Channel assignment for 800 MHz cellular systemsChannel assignment Band a 416 channels Band B 416 channels Introduction 6Introduction Standard 01.01 June Cell Site Configurations Omni configurationOverview Omni N=7 frequency reuse plan Sectorized configuration120 N=7 sectorized frequency reuse plan 60 N=4 sectorized frequency reuse plan Cell Site Layouts Omni cell site configurationRF Frame Control Channel redundancyCell Site Layouts 4Cell Site Layouts TRU/DPA Transmit cabling6Cell Site Layouts Frames TRUs ATCs Receive cablingComponent requirement No.Stsr cell site configuration CE Frame RF Frame Block diagram of a 120 Stsr Metrocell using one RF FrameBlock diagram of a 120 Stsr Metrocell using three RF Frames 12Cell Site Layouts DPA 9 Port1 CCH ATC3 Port DPA 10 Port1 14Cell Site Layouts TRU/DPA ATC 16Cell Site Layouts Sector Sector Z Sector YSector Y TX/RX, 3 RX Sector W Stsr cell site connectionControl Channel Locate Channel Receiver Sector Sector U22Cell Site Layouts Block diagram of a 60 Stsr Metrocell with two RF Frames 24Cell Site Layouts Block diagram of a 60 Stsr Metrocell with four RF Frames 26Cell Site Layouts Transmit cabling 28Cell Site Layouts TRU/DPA 30Cell Site Layouts Port2 ATC3 Port DPA Port1 RF Frame 32Cell Site Layouts Receive cabling 34Cell Site Layouts Sector Y 36Cell Site Layouts Component requirement 38Cell Site Layouts Standard 01.01 June Major components of a DualMode Metrocell Description Cell Site ComponentsNTAX98AA FRU Customer Service Operations 4Cell Site Components Standard 01.01 June Safety requirements Power and Grounding RequirementsPower and grounding requirements Power and Grounding Requirements 4Power and Grounding Requirements Power distribution for the CE and RF Frames in a Metrocell Frame power distributionGrounding UL/CSA approval System power protectionCEC par DC coupled signals Cable Identification 10Power and Grounding Requirements Standard 01.01 June Datafill Overview Datafilling a Metro Cell SiteTable Acualm Table ClliAlarm Points Metro RF Frame ATCCavities Fan Pwr Hsmo +27V a Rip Connector J206 Table VCHINV, CCHINV, LcrinvPort # Example of Metro TRU datafill Frequency Assignment ExampleIcrm Example of Metro ICRM/TRU hardwire configuration8Datafilling a Metro Cell Site Standard 01.01 June Appendix a DualMode Metrocell Cell Site Specifications System ConfigurationRadio Frequency Audio Interface AlarmsDC Power Requirements Power Distribution RequirementsMechanical Environmental PackagingRegulatory Electromagnetic Emissions Radiated EmissionsTelecom Compliance Product Safety =7 Frequency plan Band a Appendix B Frequency Plans=7 Frequency plan Band B =4 Frequency plan Band B =4 Frequency plan Band a10Frequency Plans Standard 01.01 June Page Cell Site Description