Transmit cabling, Tru/Dpa | Nortel Networks 411-2021-111 instruction

Cell Site Layouts 3-5

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. The output of each power amplifier (PA) is input to an 8-channel AutoTune Combiner (ATC).

The output of the ATC is connected to the Transmit (TX) port of the duplexer. For RF Frames using more than one ATC, the outputs of the ATCs are combined together and connected to the TX port of the duplexer. The duplexer serves as the interface between the antenna system and the RF frame. Table 3-1 lists the connection between the PAs and the ATC for an RF Frame with up to 20 channels. Table 3-2 lists the connection between the PAs and the ATC for an RF Frame with 21 channels or more.

Table 3-1

RF Frame 1 PA to ATC connection for an omni Metrocell with up to 20 channels

	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 (LCH)	ATC Shelf 1	ATC1 - Port 4
Shelf 1
Shelf 1	DPA 3 - Port1		ATC1 - Port 5
	DPA 3 - Port1		ATC1 - Port 5

	DPA 3 - Port2		ATC1 - Port 6

	DPA 4 - Port1		ATC1 - Port 7

	DPA 4 - Port2		ATC1 - Port 8

	DPA 5 - Port1		ATC2 - Port 1

	DPA 5 - Port2		ATC2 - Port 2	Duplexer		Antenna
				Position 2		(Main receive)
	DPA 6 - Port1		ATC2 - Port 3	Position 2		(Main receive)
	DPA 6 - Port1		ATC2 - Port 3

TRU/DPA	DPA 6 - Port2	ATC Shelf 2	ATC2 - Port 4
Shelf 2
Shelf 2	DPA 7 - Port1		ATC2 - Port 5
	DPA 7 - Port1		ATC2 - Port 5

	DPA 7 - Port 2		ATC2 - Port 6

	DPA 8 - Port1		ATC2 - Port 7

	DPA 8 - Port 2		ATC2 - Port 8

	DPA 9 - Port1		ATC3 - Port 1

TRU/DPA	DPA 9 - Port 2	ATC Shelf 3	ATC3 - Port 2
Shelf 3
Shelf 3	DPA 10 - Port1		ATC3 - Port 3
	DPA 10 - Port1		ATC3 - Port 3

	DPA 10 - Port2		ATC3 - Port 4

Note: Additional RF Frames with 20 channels or less are connected to their respective TX/RX antennas in the same way as RF Frame 1.

DMS-MTX DualMode Metrocell Cell Site Description

Image 31

Nortel Networks 411-2021-111 manual Transmit cabling, Tru/Dpa

Contents

DualMode Metrocell Page Page June Publication history Contents Appendices Power and Grounding RequirementsCell Site Components Datafilling a Metro Cell Site List of tables Block diagram of a 120 Stsr Metrocell using one RF FramePage Intended audience for this publication About this document Applicability of this publication How this publication is organized Band List of termsCarrier RF Duplexer CellDBm DBW Loss FilterForward path Isolation Return loss ModulationOmni Dqpsk Sector Signal RFSectorization Stsr Northern Telecoms DualMode Metrocell Introduction Digital ready cellular product System architecture of a DualMode Metrocell Metro RF Frame Basic components of a DualMode Metrocell Universal CE Frame Channel assignment for 800 MHz cellular systems 800 MHz cellular bandChannel assignment Band a 416 channels Band B 416 channels Introduction 6Introduction Standard 01.01 June Omni configuration Cell Site ConfigurationsOverview Omni N=7 frequency reuse plan Sectorized configuration 120 N=7 sectorized frequency reuse plan 60 N=4 sectorized frequency reuse plan Cell Site Layouts Omni cell site configuration RF Frame Control Channel redundancy Cell Site Layouts 4Cell Site Layouts TRU/DPA Transmit cabling 6Cell 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 Frame Block 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 Y Sector Y TX/RX, 3 RX Sector W Stsr cell site connectionControl Channel Locate Channel Receiver Sector Sector U 22Cell 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 Components NTAX98AA FRU Customer Service Operations 4Cell Site Components Standard 01.01 June Safety requirements Power and Grounding Requirements Power and grounding requirements Power and Grounding Requirements 4Power and Grounding Requirements Power distribution for the CE and RF Frames in a Metrocell Frame power distribution Grounding UL/CSA approval System power protection CEC par DC coupled signals Cable Identification 10Power and Grounding Requirements Standard 01.01 June Datafill Overview Datafilling a Metro Cell Site Table Acualm Table Clli Metro RF Frame ATC Alarm PointsCavities Fan Pwr Hsmo +27V a Table VCHINV, CCHINV, Lcrinv Rip Connector J206Port # Example of Metro TRU datafill Frequency Assignment Example Icrm Example of Metro ICRM/TRU hardwire configuration 8Datafilling a Metro Cell Site Standard 01.01 June System Configuration Appendix a DualMode Metrocell Cell Site SpecificationsRadio Frequency Audio Interface Alarms Power Distribution Requirements DC Power RequirementsMechanical Environmental Packaging Radiated Emissions Regulatory Electromagnetic 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 a 10Frequency Plans Standard 01.01 June Page Cell Site Description