Nortel Networks 411-2021-111 manual 12Cell Site Layouts

Page 38

3-12Cell Site Layouts

Transmit cabling

In the transmit path, the output of each Transmit Receive Unit (TRU) is connected to the input of each corresponding power amplifier (PA) on the Dual Power Amplifier (DPA) module.

For a 120° STSR cell site with one RF Frame, each TRU/DPA Shelf and its associated ATC and duplexer serve for one of the three sectors; TRU/DPA Shelf 1, ATC 1 and Duplexer 1 for Sector X, TRU/DPA Shelf 2, ATC 2 and Duplexer 2 for Sector Y and TRU/DPA Shelf 3, ATC 3 and Duplexer 3 for Sector Z. The output of each power amplifier (PA) is input to an 8-channel AutoTune Combiner (ATC). The output of each 8-channel ATC is connected to the Transmit (TX) port of each corresponding duplexer. Table 3-5 lists the connection between the PAs and the ATC for a 120° STSR cell site using one RF Frame for three sectors.

For a 120° STSR cell site with three RF Frames, each frame serves for one of the three sectors; RF Frame 1 for Sector X, RF Frame 2 for Sector Y and RF Frame 3 for Sector Z. With an RF Frame holding up to 20 channels, only one duplexer is required. With 21 or more channels in one RF Frame, two duplexers are required. Table 3-6 lists the connection between the PAs and the ATC for an RF Frame with up to 20 channels. Table 3-7 lists the connection between the PAs and the ATC for an RF Frame with 21 channels or more.

Table 3-5

PA to ATC connection for a 120° Metrocell with one RF Frame

 

From

Through

 

To

 

 

 

 

 

 

 

 

DPA 1 - Port1 (CCH)

 

ATC1 - Port 1

 

 

 

 

 

 

 

 

 

 

 

DPA 1 - Port2

 

ATC1 - Port 2

 

 

 

 

 

 

 

 

 

 

 

DPA 2 - Port1

 

ATC1 - Port 3

 

 

 

 

 

 

 

 

 

 

TRU/DPA

DPA 2 - Port2 (LCR)

ATC Shelf 1

ATC1 - Port 4

Duplexer

 

Antenna

Shelf 1

 

 

 

Position 1

 

(Main receive

DPA 3 - Port1

 

ATC1 - Port 5

 

 

 

 

 

for Sector X)

 

 

 

 

 

 

 

DPA 3 - Port2

 

ATC1 - Port 6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DPA 4 - Port1

 

ATC1 - Port 7

 

 

 

 

 

 

 

 

 

 

 

DPA 4 - Port2

 

ATC1 - Port 8

 

 

 

 

 

 

 

 

 

 

 

DPA 5 - Port1 (CCH)

 

ATC2 - Port 1

 

 

 

 

 

 

 

 

 

 

 

DPA 5 - Port2

 

ATC2 - Port 2

 

 

 

 

 

 

 

 

 

 

 

DPA 6 - Port1

 

ATC2 - Port 3

 

 

 

 

 

 

 

 

 

 

TRU/DPA

DPA 6 - Port2 (LCR)

ATC Shelf 2

ATC2 - Port 4

Duplexer

 

Antenna

Shelf 2

 

 

 

Position 2

 

(Main receive

DPA 7 - Port1

 

ATC2 - Port 5

 

 

 

 

 

for Sector Y)

 

 

 

 

 

 

 

DPA 7 - Port 2

 

ATC2 - Port 6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DPA 8 - Port1

 

ATC2 - Port 7

 

 

 

 

 

 

 

 

 

 

 

DPA 8 - Port 2

 

ATC2 - Port 8

 

 

 

 

 

 

 

 

 

 

411-2021-111 Standard 01.01 June 1996

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Contents DualMode Metrocell Page Page Publication history JuneContents Datafilling a Metro Cell Site Power and Grounding RequirementsCell Site Components AppendicesBlock diagram of a 120 Stsr Metrocell using one RF Frame List of tablesPage About this document Intended audience for this publicationHow this publication is organized Applicability of this publicationCarrier RF List of termsBand DBW CellDBm DuplexerIsolation FilterForward path LossDqpsk ModulationOmni Return lossSectorization Signal RFSector Stsr Introduction Northern Telecoms DualMode MetrocellSystem architecture of a DualMode Metrocell Digital ready cellular productBasic components of a DualMode Metrocell Universal CE Frame Metro RF FrameChannel assignment Band a 416 channels Band B 416 channels 800 MHz cellular bandChannel assignment for 800 MHz cellular systems Introduction 6Introduction Standard 01.01 June Overview Cell Site ConfigurationsOmni configuration Sectorized configuration Omni N=7 frequency reuse plan120 N=7 sectorized frequency reuse plan 60 N=4 sectorized frequency reuse plan Omni cell site configuration Cell Site LayoutsControl Channel redundancy RF FrameCell Site Layouts 4Cell Site Layouts Transmit cabling TRU/DPA6Cell Site Layouts No. Receive cablingComponent requirement Frames TRUs ATCsStsr cell site configuration CE Frame Block diagram of a 120 Stsr Metrocell using one RF Frame 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 Y Sector ZSector Y TX/RX, 3 RX Sector U Stsr cell site connectionControl Channel Locate Channel Receiver Sector Sector W22Cell 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 Cell Site Components Major components of a DualMode Metrocell DescriptionNTAX98AA FRU Customer Service Operations 4Cell Site Components Standard 01.01 June Power and Grounding Requirements Safety requirementsPower and grounding requirements Power and Grounding Requirements 4Power and Grounding Requirements Frame power distribution Power distribution for the CE and RF Frames in a MetrocellSystem power protection Grounding UL/CSA approvalCEC par DC coupled signals Cable Identification 10Power and Grounding Requirements Standard 01.01 June Datafilling a Metro Cell Site Datafill OverviewTable Clli Table AcualmCavities Fan Pwr Alarm PointsMetro RF Frame ATC Hsmo +27V a Port # Rip Connector J206Table VCHINV, CCHINV, Lcrinv Frequency Assignment Example Example of Metro TRU datafillExample of Metro ICRM/TRU hardwire configuration Icrm8Datafilling a Metro Cell Site Standard 01.01 June Radio Frequency Appendix a DualMode Metrocell Cell Site SpecificationsSystem Configuration Alarms Audio InterfaceMechanical DC Power RequirementsPower Distribution Requirements Packaging EnvironmentalTelecom Compliance Regulatory Electromagnetic EmissionsRadiated Emissions Product Safety Appendix B Frequency Plans =7 Frequency plan Band a=7 Frequency plan Band B =4 Frequency plan Band a =4 Frequency plan Band B10Frequency Plans Standard 01.01 June Page Cell Site Description
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