Nortel Networks 411-2021-111 User Manual

411-2021-111

Wireless Networks

DualMode Metrocell

Cell Site Description

411-2021-111 Standard 01.01 June 1996



Wireless Networks

DualMode Metrocell

Cell Site Description

Product release: DualMode Metrocell
Document release: Standard 01.01
Date: June 1996
Document Number: 411-2021-111

Copyright Country of printing Confidentiality Legal statements Trademarks

1996 Northern Telecom

Printed in the United States of America

NORTHERN TELECOM CONFIDENTIAL:

Telecom. Except as specifically authorized in writing by Northern Telecom, the holder of this document shall keep the information
contained herein confidential and shall protect same in whole or in part from disclosure and dissemination to third parties and use
same for evaluation, operation, and maintenance purposes only.

Information is subject to change without notice.

DMS, DMS SuperNode, DMS-MSC, DMS-HLR, DMS-100, and MAP are trademarks of Northern Telecom.

The information contained in this document is the property of Northern

iv

Publication history

June 1996

Standard 01.01 Initial release of document.

411-2021-111 Standard 01.01 June 1996

v

Contents

Publication history iv
About this document ix

Intended audience for this publication ix
How this publication is organized x
Applicability of this publication x

List of terms xi
Introduction 1-1

Northern Telecom's DualMode Metrocell 1-1
The 800 MHz cellular band 1-4

Cell Site Configurations 2-1

Overview 2-1
Omni configuration 2-1
120 ° sectorized configuration 2-2
60 ° sectorized configuration 2-4

Cell Site Layouts 3-1

Omni cell site configuration 3-1

Control Channel redundancy 3-2
Transmit cabling 3-5
Receive cabling 3-7
Component requirement 3-7

120 ° STSR cell site configuration 3-8

Control Channel redundancy 3-8
Transmit cabling 3-12
Receive cabling 3-17
Component requirement 3-20

60 ° STSR cell site connection 3-21

Control Channel redundancy 3-21
Transmit cabling 3-27
Receive cabling 3-33
Component requirement 3-37

DMS-MTX DualMode Metrocell Cell Site Description

vi

Contents

Cell Site Components 4-1

Customer Service Operations 4-3

Power and Grounding Requirements 5-1

Safety requirements 5-1
Power and grounding requirements 5-2

Frame power distribution 5-5
System power protection 5-6
Grounding 5-6

Cable Identification 5-9

Datafilling a Metro Cell Site 6-1

Datafill Overview 6-1

Table CLLI 6-2
Table ACUALM 6-2
Table VCHINV, CCHINV, LCRINV 6-5

Appendices

Appendix A: DualMode Metrocell Cell Site Specifications 7-1

System Configuration 7-1
Radio Frequency 7-1
Audio Interface 7-2
Alarms 7-2
DC Power Requirements 7-3
Power Distribution Requirements 7-3
Mechanical 7-3
Packaging 7-4
Environmental 7-4
Regulatory 7-5

Appendix B: Frequency plans 7-7

N=7 Frequency plan (Band A) 7-7
N=7 Frequency plan (Band B) 7-8
N=4 Frequency plan (Band A) 7-9
N=4 Frequency plan (Band B) 7-9

List of figures

Figure 1-1 System architecture of a DualMode Metrocell 1-2
Figure 1-2 Digital ready cellular product 1-2
Figure 1-3 Basic components of a DualMode Metrocell 1-3
Figure 1-4 Channel assignment for 800 MHz cellular systems 1-4
Figure 2-1 Omni (N=7) frequency reuse plan 2-2
Figure 2-2 120 ° (N=7) sectorized frequency reuse plan 2-3
Figure 2-3 60 ° (N=4) sectorized frequency reuse plan 2-4
Figure 3-1 Frame layout of an omni Metrocell with one RF frame (front view) 3-

2

Figure 3-2 Block diagram of an omni Metrocell with up to 20 channels in one

RF Frame 3-3

Figure 3-3 Block diagram of an omni Metrocell with 21 to 24 channels in one

RF Frame 3-4

411-2021-111 Standard 01.01 June 1996

Contents vii

Figure 3-4 Frame layout of a 120 ° STSR Metrocell site with one RF frame

(front view) 3-9

Figure 3-5 Frame layout of a 120 ° STSR Metrocell site with three RF frames

(front view) 3-9
Figure 3-6 Block diagram of a 120 ° STSR Metrocell using one RF Frame 3-10
Figure 3-7 Block diagram of a 120 ° STSR Metrocell using three RF Frames 3-

11
Figure 3-8 Frame layout of a 60 ° STSR Metrocell with two RF frames (front

view) 3-22
Figure 3-9 Typical frame layout of a 60 ° STSR Metrocell with four RF frames

(front view) 3-22
Figure 3-10 Block diagram of a 60 ° STSR Metrocell with two RF Frames 3-23
Figure 3-11 Block diagram of a 60 ° STSR Metrocell with four RF Frames 3-25
Figure 5-1 Power distribution for the CE and RF Frames in a Metrocell 5-5
Figure 6-1 Example of Metro TRU datafill 6-6
Figure 6-2 Example of Metro ICRM/TRU hardwire configuration 6-7

List of tables

Table 1-1 Channel designation and frequency assignment 1-5
Table 3-1 RF Frame 1 PA to ATC connection for an omni Metrocell with up to

20 channels 3-5
Table 3-2 RF Frame 1 PA to ATC connection for an omni Metrocell with 21

channels or more 3-6
Table 3-3 RMC to splitter connections for an Omni Metrocell 3-7
Table 3-4 Component requirement for an omni Metrocell 3-7
Table 3-5 PA to ATC connection for a 120 ° Metrocell with one RF Frame 3-12
Table 3-6 PA to ATC connection for a 120 ° Metrocell with 20 channels or less

per RF frame for one sector 3-13
Table 3-7 PA to ATC connection for a 120 ° Metrocell with 21 channels or

more per RF frame for one sector 3-15
Table 3-8 RMC to splitter connections for a 120 ° STSR Metrocell with one RF

Frame 3-17
Table 3-9 RMC to splitter connections for a 120 ° STSR Metrocell with three

RF Frames 3-18
Table 3-10 Component requirement for a 120 ° STSR Metrocell with one RF

Frame 3-20
Table 3-11 Component requirement for a 120 ° STSR Metrocell with three RF

Frames 3-20
Table 3-12 PA to ATC connection for a 60 ° STSR Metrocell using two RF

Frames 3-28
Table 3-13 PA to ATC connection for a 60 ° STSR Metrocell using four RF

Frames 3-30
Table 3-14 RMC to splitter connections for a 60 ° STSR Metrocell with two RF

Frames 3-33
Table 3-15 RMC to splitter connections for a 60 ° STSR Metrocell with four RF

Frames 3-34
Table 3-16 Component requirement for a 60 ° STSR Metrocell with two RF

Frames 3-37
Table 3-17 Component requirement for a 60 ° STSR Metrocell with four RF

Frames 3-37

DMS-MTX DualMode Metrocell Cell Site Description

viii Contents

Table 4-1 Major components of a DualMode Metrocell 4-1
Table 5-1 Metrocell DC Power performance requirements 5-3
Table 5-2 Cable identification - North America 5-9
Table 6-1 Datafill differences of the Metrocell from an NT800DR cell 6-1
Table 6-2 Trunk requirement for different Metrocell configurations 6-2
Table 6-3 MTX Datafill Alarm Points for Metro RF Frame 6-3
Table 6-4 MTX Alarm Points Datafill Numbers for Metro RF Frame 6-4
Table 6-5 MTX Alarm Points Datafill Numbers for Metro CE Frame

components 6-4
Table 6-6 NT8X47BA Port Numbers for Metro TRU locations 6-5

411-2021-111 Standard 01.01 June 1996

ix

About this document

This publication is one of a set of documents that provide Northern Telecom
(Nortel) customers with information and suggestions on the planning and
maintenance of their DualMode Metrocell system. This set of documents
includes the following manuals:

• DualMode Metrocell Functional Description Manual

— DualMode Metrocell Cell Site Description
— DualMode Metrocell Common Equipment (CE) Frame Description
— DualMode Metrocell Radio Frequency (RF) Frame Description

• DualMode Metrocell Planning and Engineering Guidelines

• DualMode Metrocell Installation Manual

• DualMode Metrocell Operation and Maintenance Manual

• DualMode Metrocell Troubleshooting Guidelines

The manual suite for the DualMode Metrocell provides information on cell
site configurations, hardware components, planning and installation
procedures, as well as maintenance and troubleshooting methods.

Intended audience for this publication

The intended audience for this set of manuals is the cell site technicians and
the planning engineers who require information in the maintenance and
planning of a DualMode Metrocell. The Functional Description Manual
provides a technical reference foundation for the other documents in the
documentation suite and is written for all.

The Planning and Engineering Guidelines is written for system planning
personnel in implementing new cells or expanding existing cell sites in a
cellular system.

The Operation and Maintenance Manual and the Troubleshooting Guidelines
that provide information on problem recognition and preventive maintenance
are written for cell site technicians to assist them in troubleshooting and
performing their routine work.

DMS-MTX DualMode Metrocell Cell Site Description

x

About this document

The document suite assumes that the reader possesses a basic knowledge of
the cellular system and radio propagation and is familiar with measurement
units incorporated in the system. Therefore, this document will not provide
detailed information on the theory of switching and radio propagation.

How this publication is organized

This publication is organized to present the following information:

• an introduction to the DualMode Metrocell Cell Site

• the Metrocell cell site configurations; omni, 120 ° STSR and 60 ° STSR

• the equipment layouts, block diagrams and transmit and receive cabling

for each configuration

• the cell site components required for each configuration

• the power and grounding requirements for a Metrocell cell site

• information on datafilling a Metrocell.

Applicability of this publication

This publication is generically applicable to MTX01 feature functionality, yet
captures some BCS-independent environment and implementation issues.

411-2021-111 Standard 01.01 June 1996

xi

List of terms

A-Band

The lower 333 channels (Channel 1 - 333) of the cellular band, normally assigned
to a non-wireline operator in the US and Canada.
The Expanded Spectrum provides 83 more channels, 50 (Channel 667 - 716) in
the A’-Band and 33 (channel 991 - 1023) in the A"-Band.

ACU

AMPS

ATC

B-Band

BER

Carrier (RF)

Alarm Control Unit. A unit that provides discrete alarm monitoring, reporting and
control functions at the cell site. It concentrates all alarm input points at the cell
site and updates the MTX of any status change over redundant data links.

Advanced Mobile Phone Service. Analog cellular phone service.

AutoTune Combiner. A cavity/isolator combiner featuring an automatic tuning
system which monitors the transmitted RF and automatically tunes itself to that
frequency.

The upper 333 channels (Channel 334 - 666) of the cellular band, normally
assigned to a wireline operator in the US and Canada.
The Expanded Spectrum provides 83 more channels (Channel 717 - 799) in the
B’-Band.

Bit Error Rate. The ratio of error bits to the total number of transmitted bits. It is
a measurement of quality of the digital connection.

An unmodulated radio signal. Normally, it is a pure sine wave of steady
frequency, amplitude, and phase.

CCH

Control Channel, sometimes referred to as the Signaling Channel which is always
in use to enable call setup and registration.

DMS-MTX DualMode Metrocell Cell Site Description

xii List of terms

Cell

CSM2

dBm

dBW

DCC

ES

By theoretical design, it is the geographical representation of the cellular
coverage area or service area defining both the associated size and shape.

Cell Site Monitor 2. A unit that provides analog testing and monitoring
capabilities at the cell site.

Decibels above a milliwatt. Unit of power measurement popular in wireless
telephony, general telephony, audio, and microwave.

Decibels above a watt. Unit of measurement for radio power

Digital Color Code. An identifying code associated with the control channel of
the cellular base transmitter which is used to enhance call processing in the
cellular infrastructure.

DLR

DMS-MTX

DPA

DRUM

Duplexer

DVCC

Digital Locate Receiver. The TDMA equivalent of the Locating Channel
Receiver. See LCR.

The acronym for Nortel's family of cellular switches: Digital Multiplex Switch ­Mobile Transmission Exchange.

Dual Power Amplifier. A module which contains two discrete power amplifiers
that provide amplification of the RF signal for the two corresponding Transmit
Receive Units (TRU) on the same TRU/DPA shelf.

DualMode Radio Unit Monitor. A test and monitor unit capable of radio
communications with any Voice Channel of the local Transmit Receive Units
(TRU) in the digital mode.

A device that consists of two pass or pass/reject filters configured to provide a
common output port for both transmit and receive frequencies.

Digital Verification Color Code. The TDMA equivalent of DCC.

Expanded Spectrum. The additional frequency spectrum assigned to the cellular
band. The Expanded Spectrum in the A-Band consists of the A’-Band and the A"­Band while the B’-Band is the Expanded Spectrum for the B-Band. The
Expanded Spectrum provides a total of 416 channels to each of the two bands.

411-2021-111 Standard 01.01 June 1996

FDMA

Frequency Division Multiple Access. A frequency assignment arrangement
whereby all users share the total frequency allotment and each frequency is
assigned to a given user at access on a multiple user access basis.

Filter

A frequency selective device which is tuned to pass some frequencies and
attenuate others. Common filter types include high-pass, low pass, band-pass,
and notch filters

Frequency Modulation. A modulation technique that causes the frequency of the
carrier to vary above and below its resting frequency; the rate of which is
determined by the frequency of the modulating signal and the deviation of which
is determined by the magnitude of the modulating signal.

Forward path

The path from cell site to cellular subscriber.

IM

FM

List of terms xiii

HSMO

ICP

ICRM

Isolation

High Stability Master Oscillator. A unit that provides a highly stable 4.8 MHz
reference for synchronizing the Transmit Receive Unit (TRU).

Intelligent Cellular Peripheral. A switch site peripheral that provides an interface
between the cell site and the switch. The ICP also oversees the operations of the
cell site.

Integrated Cellular Remote Module. A cell site peripheral that serves as an
interface between the Intelligent Cellular Peripheral (ICP) and the radio
transmission subsystems. The ICRM is designed to support both analog and
digital Radio Frequency (RF) equipment.

Intermodulation. A type of interaction between signals in a nonlinear medium
which produces phantom signals at sum and difference frequencies. These
phantom signals may interfere with reception of legitimate signals occupying the
frequencies upon which they happen to fall.

The attenuation (expressed in dB) between any two signal or radiation points.

LCR

Loss

Locating Channel Receiver. A radio receiver which is frequency agile and is used
to measure and report the received signal strength, in dBm, of a channel.

A magnitude of attenuation, expressed in dB, for a given path between any two
points.

DMS-MTX DualMode Metrocell Cell Site Description

xiv List of terms

Modulation

NES

Omni

/4 DQPSK

RF

π

The process of placing information on an RF carrier. The modulation technique
may involve changing the amplitude, frequency, or phase of the carrier
determined by the modulation index.

Non-expanded Spectrum. The frequency spectrum initially assigned to the
cellular band. The Non-expanded Spectrum provides 333 channels to each of the
two bands, the A-Band and the B-Band.

An antenna design which permits radiation in essentially all H-Plane azimuths.
In cell sites, an Omni configuration means a single set of omni antennas is used
for all channels.

Variation of Differential Quadrature Phase Shift Keying used in D_AMPS IS-54
TDMA for improved spectral characteristics and phase resolution. Permissible
phase changes are integral multiples of π /4 radians (45 degrees). π /4 is used to
reduce the peak to root mean square ratio requirements for linear PAs.

Return loss

A logarithmic relationship of the incident signal to the reflected signal as
expressed, in dB, by the following relationship:

where Pi = incident power in watts

The strength of the signal, expressed in dB, reflected by a load back into a
transmission line due to impedance mismatch. -14 dB corresponds to a VSWR of

1.5:1.

Reverse path

The path from cellular subscriber terminal to cell site.

Radio Frequency. Electromagnetic energy of the frequency range just above the
audible frequencies and extending to visible light.

RIP

Rack Interface Panel. The RIP is the interface between the cell site power supply
and the cell site equipment.

Return Loss =

10 log

Pr = reflected power in watts

P

r

P

i

411-2021-111 Standard 01.01 June 1996

RMC

RSSI

SAT

SCC

List of terms xv

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

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.

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.

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-to­noise 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

xvi List of terms

STSR

TDMA

TRU

ST

Signaling Tone. In AMPS cellular, a 10 kHz tone transmitted on the Reverse
Voice Channel (RVC) as a precursor to messaging activity, and for certain call­processing functions (acknowledgments, call termination). Presence of the tone
mutes normal conversational audio.

Sectored-Transmit/Sectored-Receive. A cell configuration in which a different
control and voice frequency assignment is designated for each sector. A
directional antenna system is required for each sector.

Time Division Multiple Access. A modulation and transmission format that
allows a number of digital conversations (three in TDMA-3) to occur within the
same Radio Frequency (RF) channel. Mobile units take turns transmitting/
receiving data on specific time slots of a TDMA frame.

Transmit Receive Unit. The TRU is a Digital Signal Processing (DSP) based
transceiver capable of two modes of operation, analog (AMPS) and digital
(TDMA).

VCH

VSWR

Voice Channel. A Radio Frequency (RF) channel used to transmit cellular voice
conversations. The VCH is also an integral part of call setup, handoff, and
disconnect.

Voltage Standing Wave Ratio. A measure of the mismatch between the
transmitter source impedance and the load impedance to which it is connected. It
is defined by the following relationship:

1 +

VSWR =

1 -

Reflected Power

Forward Power

Reflected Power

Forward Power

411-2021-111 Standard 01.01 June 1996

1-1

1

Introduction

Northern Telecom's DualMode Metrocell

As cellular systems evolve to the digital format, service providers and mobile
subscribers are confronted by a mixture of analog and digital technologies.
Northern Telecom (Nortel)’s dual mode cellular product allows a smooth
transition from analog to digital technology. It uses Time Division Multiple
Access (TDMA) technology for digital systems and Advanced Mobile Phone
Service (AMPS) technology for analog systems. This evolutionary strategy
enables service providers to gradually upgrade their cellular systems to digital
while providing support of existing analog equipment.

The Nortel cellular system supporting dual mode service includes the following
components:

• the DMS-MTX switch containing the Intelligent Cellular Peripheral (ICP)

unit at the mobile switching office

• dual mode cell sites with the configurable DualMode Radio Units (DRU)

on a Radio Frequency (RF) Frame and the Integrated Cellular Remote
Module (ICRM), on a Common Equipment (CE) Frame at the cell site

• external and internal interface links.

The Nortel DualMode Metrocell serves as the intelligent interface between a
Digital Multiplex Switch - Mobile Telephone Exchange (DMS-MTX) and its
registered cellular mobiles. It is a dual mode cell that works in both the analog
(AMPS) mode and the digital (TDMA) mode.

The Metrocell is designed for high density, small radius cells in areas where
large traffic capacity is required. It can exist independently or it can be added
to existing cells for increased coverage. The Metrocell provides a reduced
power output for urban applications. The typical power output of the Power
Amplifier (PA) is 22 watts (43.5 dBm).

Figure 1-1 shows the architecture of a DualMode Metrocell system and
Figure 1-2 is a block diagram of the product of the system.

DMS-MTX DualMode Metrocell Cell Site Description

1-2 Introduction

Figure 1-1
System architecture of a DualMode Metrocell

PSTN

Trunk

Figure 1-2
Digital ready cellular product

DMS-MTX

Digital Transmission

Facility

DualMode

Metrocell

DMS - MTX

ICP

SWITCH SITE

There are at least two equipment frames in a Metrocell, a Universal Common
Equipment (CE) Frame and a Metro Radio Frequency (RF) Frame. The cell
site can be expanded or sectorized by adding more Metro RF frames as traffic
grows. The number of Metro RF frames is determined by the cell site
configuration and the channel capacity. Figure 1-3 shows the frames and the
components of a DualMode Metrocell.

411-2021-111 Standard 01.01 June 1996

voice and
control

ICRM

voice &
control

control

CELL SITE

control

DRU

DRUM

CSM2

ACU

Figure 1-3
Basic components of a DualMode Metrocell

Universal CE Frame Metro RF Frame

Introduction 1-3

RIP

DRUM

ACU

HSMO

CSM2

Dual RMC
(one to six)

ICRM

Blank Panel

Base

Duplexer

(one to three)

TRU/DPA Shelf
(TRUs & DPAs)

TRU/DPA Shelf
(TRUs & DPAs)

TRU/DPA Shelf
(TRUs & DPAs)

Legend:
RIP Rack Interface Panel
DRUM DualMode Radio Unit Monitor
ACU Alarm Control Unit
HSMO High Stability Master Oscillator
CSM2 Cell Site Monitor 2
RMC Receive Multicoupler
ICRM Integrated Cellular Remote Module
ATC AutoTune Combiner
TRU Transmit Receive Unit
DPA Dual Power Amplifier

RIP

ATC

ATC

ATC

Base

DMS-MTX DualMode Metrocell Cell Site Description

1-4 Introduction

The 800 MHz cellular band

In an 800 MHz North American cellular system, a frequency spectrum of 50
MHz is available for service. Operating from 824 to 894 MHz, including the
expanded spectrum, the system conforms to the AMPS IS-54 protocol.
Typically this range is divided into 832 radio frequency (RF) channels. The 832
RF channels are divided into two bands, A and B. The two bands are identified
as follows:

• Band A—for Non-Wireline Operators

• Band B—for Wireline Operators.

Each frequency band has 416 RF channels. Of these 416 RF channels,
typically 21 (depending on the frequency plan) are assigned as the Control
Channels (CCH) and the remaining 395 are Voice Channels (VCH). See
Figure 1-4 and Table 1-1.

Figure 1-4
Channel assignment for 800 MHz cellular systems

Base Station Frequency (MHz)

824 825 835 835 846.5 849 851

RX

Band

869 870 880 890 891.5 894 896TX

A" A B A' B'

1

991

1023

Channel assignment Band A (416 channels) Band B (416 channels)

Control channels 313 - 333 (21) 334 - 354 (21)
Optional—TDMA secondary

control channels
Voice channels 001 - 312 (312)

A-Band CCH

B-Band CCH

333

Channel Number

688 - 708 (21) 737 - 757 (21)

667 - 716 (50)
991 - 1023 (33)

716 799

666

R=Reserved

355 - 666 (312)
717 - 799 (83)

R

411-2021-111 Standard 01.01 June 1996

Table 1-1
Channel designation and frequency assignment

Introduction 1-5

System Channel Cell site receive

frequency (MHz)

Not used 990 824.010 869.010

A" 991 - 1023 824.040 - 825.000 869.040 - 870.000

A 1 - 333 825.030 - 834.990 870.030 - 879.990
B 334 - 666 835.020 - 844.980 880.020 - 889.980
A’ 667 - 716 845.010 - 846.480 890.010 - 891.480

B’ 717 - 799 846.510 - 848.970 891.510 - 893.970

Cell site transmit

frequency (MHz)

The relationship between the channel number (N) and the frequency is:
Channel number: 1 ≤ N ≤ 799

Receiver frequency (in MHz) = 0.03N + 825.000
Transmit frequency (in MHz) = 0.03N +870.000

Channel number: 990 ≤ N ≤ 1023

Receiver frequency (in MHz) = 0.03(N - 1023) + 825.000
Transmit frequency (in MHz) = 0.03(N - 1023) + 870.000

Both non-expanded and expanded spectrums are shown in Appendix B for the
N=7 and N=4 frequency groups.

Important

For ALL Metrocell cell site configurations, the frequency

plan used should have a minimum of 21 channel spacing

(630 kHz) between the RF channels.

DMS-MTX DualMode Metrocell Cell Site Description

1-6 Introduction

411-2021-111 Standard 01.01 June 1996

2-1

2

Cell Site Configurations

Overview

The DualMode Metrocell can be configured in the following ways:

• Omni-directional transmit/receive

• 120 ° Sectored Transmit Sectored Receive (STSR)

• 60 ° Sectored Transmit Sectored Receive (STSR)

The majority of systems may begin as Omni-directional to minimize startup
costs. As the subscriber traffic increases, the Omni configuration may reach
its maximum traffic capacity. At that time it will be necessary to provide
additional capacity through expanded spectrum, 120 degree sectorization, 60
degree sectorization, or frequency borrowing.

It is important that the operator selects a frequency plan before the Omni
configuration is installed. If not, future expansions will be very difficult. The
most common frequency plans are:

• 7 Cell Cluster (N=7)—This frequency plan allows proper expansion from

Omni to 120 degree sectorization (see Figure 2-1 and Figure 2-2).

• 4 or 12 Cell Cluster (N=4 or N=12)—This frequency plan allows proper

expansion from Omni to 60 degree sectorization (see Figure 2-3).

Both non-expanded and expanded spectrums are shown in Appendix B for the
N=7 and N=4 frequency groups.

Omni configuration

In an Omni (N=7) configuration, the 416 RF channels are divided among a
group of seven cells (often known as a cluster). Each cell consists of a
maximum of 59 or 60 RF channels (four cells with 59 channels and three cells
with 60 channels, where three of the 59 or 60 channels are Control channels).
The RF channels are reused by other cell clusters. Frequency reuse refers to
the use of RF channels on the same carrier frequency in different areas which
are separated from one another by the greatest possible distance so that co­channel interference is minimized.

DMS-MTX DualMode Metrocell Cell Site Description

2-2 Cell Site Configurations

Figure 2-1 shows the layout of an Omni (N=7) frequency reuse plan;. The RF
channels used in Cell 1 of a cluster are reused in Cell 1 of other clusters,
channels in Cell 2 are reused in Cell 2 of other clusters and so on.

Figure 2-1
Omni (N=7) frequency reuse plan

CELL 6

CELL 7

CELL 2

CELL 7

CELL 1

CELL 2

CELL 6 CELL 3

CELL 5

CELL 1

CELL 4

CELL 3

CELL 7

CELL 2

CELL 5

CELL 4

CELL 6

CELL 5

CELL 1

CELL 4

CELL 3

120 ° sectorized configuration

In a 120 ° (N=7) sectorized configuration, the 416 RF channels are divided
among a cluster of seven cells. Each cell contains a maximum of 59 or 60 RF
channels, with three Control channels for each cell. Since each cell is further
divided into three sectors, each sector will contain a maximum of 19 or 20 RF
channels, with one Control channel for each sector. The available RF
channels are reused by other groups of cells within the system.

411-2021-111 Standard 01.01 June 1996

Figure 2-2 shows the layout of a 120 ° (N=7) sectorized frequency reuse plan.
The RF channels used in Cell 1 of a cluster are reused in Cell 1 of other
clusters, channels in Cell 2 are reused in Cell 2 of other clusters and so on.
This arrangement will have the RF channels using the same carrier frequency
in different areas to be separated from one another by the greatest possible
distance to minimize co-channel interference.

However, sectorization (by virtue of the modified coverage areas and
directional antenna usage) permits greater reuse of frequencies for a given
C/I ratio.

Figure 2-2
120 ° (N=7) sectorized frequency reuse plan

Sector

CELL 7

Z

Sector

CELL 2

Z

X

Y

Sector

CELL 5

Z

X

Y

Sector

CELL 4

Z

X

Y

Sector

Z

Sector

Z

Sector

X

CELL 7

Sector

Sector

CELL 2

Sector

Sector

Sector

CELL 6

Z

Sector

Sector

Y

Sector

CELL 1

Z

X

Y

Sector

Z

Sector

Sector

CELL 3

Sector

Sector

X

Sector

Y

Sector

X

Sector

Y

Sector

X

Sector

Y

Sector

X

Sector

Y

Sector

Z

Sector

Z

Sector

Z

Sector

Z

Sector

Z

Sector

X

CELL 6

Sector

Sector

X

CELL 1

Sector

Y

Sector

X

CELL 3

Sector

Sector

X

CELL 7

Sector

Sector

X

CELL 2

Sector

Cell Site Configurations 2-3

Sector

Y

Sector

Z

Sector

Z

Y

Sector

Z

Y

Sector

Z

Y

Sector

Z

X

CELL 5

Sector

Sector

X

CELL 4

Sector

Sector

X

CELL 6

Sector

Sector

X

CELL 1

Sector

Sector

CELL 3

Sector

Y

Y

Sector

Y

Sector

Z

Y

Sector

Z

X

Y

CELL 5

Sector

Sector

X

CELL 4

Sector

X

Y

Y

DMS-MTX DualMode Metrocell Cell Site Description

60 °

2-4 Cell Site Configurations

sectorized configuration

In a 60 ° (N=4) sectorized configuration, the 416 RF channels are divided
among a group of four cells. Each cell contains a maximum of 104 RF
channels, with six Control channels for each cell. Since each cell is further
divided into six sectors, each sector will contain a maximum of 16 or 17 RF
channels, with one Control channels for each sector. The RF channels are
reused by other groups of cells.

Figure 2-3 shows the layout of a 60 ° (N=4) sectorized frequency reuse plan.
The RF channels used in Cell 1 of a cluster are reused in Cell 1 of other
clusters, channels in Cell 2 are reused in Cell 2 of other clusters and so on.
This arrangement will have the RF channels on the same carrier frequency in
different areas to be separated from one another by the greatest possible
distance so that co-channel interference is minimized.

However, 60 ° sectorization is difficult to expand and optimize due to a more
demanding environment of frequency re-use.

Figure 2-3
60 ° (N=4) sectorized frequency reuse plan

Sector

X

CELL 1

Sector

U

Sector

X

CELL 3

Sector

U

Sector

X

CELL 1

Sector

U

Sector

Y

Sector

Z

Sector

Y

Sector

Z

Sector

Y

Sector

Z

Sector

W

Sector

V

Sector

X

CELL 1

Sector

U

Sector

Y

Sector

Z

Sector

W

Sector

V

Sector

W

Sector

V

Sector

X

CELL 2

Sector

U

Sector

X

CELL 4

Sector

U

Sector

Y

Sector

Z

Sector

Y

Sector

Z

Sector

W

Sector

V

Sector

W

Sector

V

Sector

W

Sector

V

Sector

W

Sector

V

Sector

W

Sector

V

Sector

W

Sector

V

Sector

W

Sector

V

Sector

X

CELL 2

Sector

U

Sector

X

CELL 4

Sector

U

Sector

X

CELL 2

Sector

U

Sector

X

CELL 4

Sector

U

Sector

Y

Sector

Z

Sector

Y

Sector

Z

Sector

Y

Sector

Z

Sector

Y

Sector

Z

Sector

W

Sector

V

Sector

W

Sector

V

Sector

W

Sector

V

Sector

X

CELL 3

Sector

U

Sector

X

CELL 1

Sector

U

Sector

X

CELL 3

Sector

U

Sector

Y

Sector

Z

Sector

Y

Sector

Z

Sector

Y

Sector

Z

Sector

W

Sector

V

Sector

W

Sector

V

Sector

X

CELL 2

Sector

U

Sector

X

CELL 4

Sector

U

Sector

Y

Sector

Z

Sector

Y

Sector

Z

Sector

W

Sector

V

Sector

X

CELL 3

Sector

U

Sector

Y

Sector

Z

411-2021-111 Standard 01.01 June 1996

3-1

3

Cell Site Layouts

This chapter provides information on the layout and cabling of the different
DualMode Metrocell configurations.

Important

For ALL Metrocell cell site configurations, the frequency
plan used should have a minimum of 21 channel spacing
(630 kHz) between the channels in one RF Frame.

Note: The DualMode Metrocell supports only Transmit Receive Units

(TRU) with Product Engineering Code (PEC) NTAX98AA. No other
radios can be used. The NTAX98AA TRU supports full digital and analog
transmissions in accordance with IS-54 and IS-41 standards.

Omni cell site configuration

The Metrocell in an omni configuration uses at least two equipment frames,
one CE Frame and one RF frame (see Figure 3-1). With only one RF frame,
the maximum number of Voice Channels (VCH) supported by the cell site is
22 since two of the 24 TRUs have to be assigned as the Control Channel
(CCH) and the Locate Channel Receiver (LCR). As traffic grows, four
additional RF frames can be added to the site to accommodate up to a
maximum of 120 channels, including the CCH and the LCR.

An RF Frame with up to 20 channels requires only one duplexer in the RF
Frame and one TX/RX antenna. The outputs of the three AutoTune
Combiners (ATC) are combined through one phasing transformer (located at
ATC 2) and then connected to Duplexer position 2. This configuration
requires a RX only antenna for the diversity receive function of the cell. See
Figure 3-2.

An RF Frame with 21 channels or more requires two duplexers in the RF
Frame and two TX/RX antennas. The outputs of the lower and middle ATCs

DMS-MTX DualMode Metrocell Cell Site Description

3-2 Cell Site Layouts

(ATC 1 and ATC 2) are combined through one phasing transformer (located at
ATC 2) and then connected to Duplexer position 2 and the main TX/RX
Antenna. The output of the upper ATC (ATC 3) is connected to Duplexer
position 3 and the diversity TX/RX Antenna. This arrangement is used to
meet the requirement of a minimum of 21 channel spacing (630 kHz)
between the channels in one RF Frame. This configuration requires a TX/RX
antenna to perform the diversity receive function of the cell. See Figure 3-3.

Control Channel redundancy

Control Channel (CCH) redundancy is commonly provided with a Locate
Channel Receiver (LCR) backup. The CCH is assigned to position 1 on the
TRU/DPA Shelf 1 and the LCR is assigned to position 4 on the same shelf.
This arrangement will have the CCH and the LCR supplied on a different DC
power feed and a TCM card. No RF coaxial switch is required since the
cavity of the LCR position on the ATC will tune to the CCH frequency when
backup is required.

Figure 3-1
Frame layout of an omni Metrocell with one RF frame (front view)

CE Frame RF Frame 1

CE RIP

DRUM

ACU

HSMO

CSM2

RMC 1

Blank Panel

ICRM

Blank Panel

Base

Duplexer

Position 3

TRU 21

TRU 17

TRU 13

TRU 9

TRU 5

TRU 1

RF RIP

Duplexer
Position 2

ATC 3

DPA11DPA

TRU 22

DPA9DPA

TRU 18

ATC 2

DPA7DPA

TRU 14

DPA5DPA

TRU 10

ATC 1

DPA3DPA

TRU 6

DPA1DPA

TRU 2

Base

12

10

8

6

4

2

Duplexer
Position 1

TRU 23

TRU 19

TRU 15

TRU 11

TRU 7

TRU 3

TRU/DPA

TRU 24

Shelf 3

TRU 20

TRU/DPA

TRU 16

Shelf 2

TRU 12

TRU/DPA

TRU 8

Shelf 1

TRU 4

Note: For a frame with up to 20 channels, only one duplexer (located in

position 2) is required.
For a frame with 21 channels or more, two duplexers (located in
positions 2 and 3) are required.

411-2021-111 Standard 01.01 June 1996

Figure 3-2
Block diagram of an omni Metrocell with up to 20 channels in one RF Frame

Cell Site Layouts 3-3

Control Channel

(Note 2)

ATC 1

PA/ATC connection

ATC 2

TRU/DPA
Shelf 1

See Table 3-1 for

TRU/DPA
Shelf 2

RF Frame 1

(Note 1)

DPA 1

DPA 4

DPA 5

DPA 8

TRU 1

6 5 4 3 2 1

TRU 8

6 5 4 3 2 1

TRU 9

6 5 4 3 2 1

TRU 16

6 5 4 3 2 1

See Table 3-3 for

RMC/TRU Shelf connection

TRU SHELF

SPLITTER 1

TRU SHELF

SPLITTER 4

TRU SHELF

SPLITTER 1

TRU SHELF

SPLITTER 4

Antenna

A1
A2
A3

A8
B1

B2
B3

B8

RX ANT

RMC 1A

RMC 1B

TX

Duplexer

Position 2

(Main

receive)

Antenna

(Diversity

receive)

Notes:

1.2.For diagram clarity, only one RF Frame is
shown. Other RF Frames with 20 channels
or less are connected and operated
identically to that of RF Frame 1.
TRU1 at TRU/DPA Shelf 1 of RF Frame 1 is
assigned as the CCH and TRU4 at the same
shelf is assigned as the backup CCH.

ATC 3

TRU/DPA
Shelf 3

DPA 9

DPA 10

ICRM HSMO

TRU 17

6 5 4 3 2 1

TRU 20

6 5 4 3 2 1

TRU SHELF

SPLITTER 1

TRU SHELF

SPLITTER 4

CE Frame

DMS-MTX DualMode Metrocell Cell Site Description

3-4 Cell Site Layouts

Figure 3-3
Block diagram of an omni Metrocell with 21 to 24 channels in one RF Frame

Control Channel

(Note 2)

ATC 1

See Table 3-2 for

PA/ATC connection

ATC 2

TRU/DPA
Shelf 1

TRU/DPA
Shelf 2

RF Frame 1

(Note 1)

DPA 1

DPA 4

DPA 5

DPA 8

TRU 1

6 5 4 3 2 1

TRU 8

6 5 4 3 2 1

TRU 9

6 5 4 3 2 1

TRU 16

6 5 4 3 2 1

See Table 3-3 for

RMC/TRU Shelf connection

TRU SHELF

SPLITTER 1

TRU SHELF

SPLITTER 4

TRU SHELF

SPLITTER 1

TRU SHELF

SPLITTER 4

Antenna

A1
A2
A3

RMC 1A

A8
B1

B2
B3

RMC 1B

B8

TX

Duplexer

RX ANT

Position 2

TX

Duplexer

RX ANT

Position 3

(Main

receive)

Antenna

(Diversity

receive)

Notes:

1.2.For diagram clarity, only one RF Frame is
shown. Other RF Frames with 21 channels
or mor are connected and operated
identically to that of RF Frame 1.
TRU1 at TRU/DPA Shelf 1 of RF Frame 1 is
assigned as the CCH and TRU4 at the same
shelf is assigned as the backup CCH.

ATC 3

TRU/DPA
Shelf 3

DPA 9

DPA 12

TRU 17

6 5 4 3 2 1

TRU 24

6 5 4 3 2 1

ICRM HSMO

411-2021-111 Standard 01.01 June 1996

TRU SHELF

SPLITTER 1

TRU SHELF

SPLITTER 4

CE Frame

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

TRU/DPA
Shelf 1

TRU/DPA
Shelf 2

TRU/DPA
Shelf 3

From Through To

DPA 1 - Port1 (CCH) ATC1 - Port 1
DPA 1 - Port2 ATC1 - Port 2
DPA 2 - Port1 ATC1 - Port 3
DPA 2 - Port2 (LCH) ATC Shelf 1 ATC1 - Port 4
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
DPA 6 - Port1 ATC2 - Port 3
DPA 6 - Port2 ATC Shelf 2 ATC2 - Port 4
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
DPA 9 - Port 2 ATC Shelf 3 ATC3 - Port 2
DPA 10 - Port1 ATC3 - Port 3
DPA 10 - Port2 ATC3 - Port 4

Position 2

Antenna
(Main receive)

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

3-6 Cell Site Layouts

Table 3-2
RF Frame 1 PA to ATC connection for an omni Metrocell with 21 channels or more

From Through To

DPA 1 - Port1 (CCH) ATC1 - Port 1
DPA 1 - Port2 ATC1 - Port 2
DPA 2 - Port1 ATC1 - Port 3

TRU/DPA
Shelf 1

TRU/DPA
Shelf 2

TRU/DPA
Shelf 3

DPA 2 - Port2 (LCH) ATC Shelf 1 ATC1 - Port 4
DPA 3 - Port1 ATC1 - Port 5
DPA 3 - Port2 ATC1 - Port 6
DPA 4 - Port1 ATC1 - Port 7
DPA 4 - Port2 ATC1 - Port 8 Duplexer
DPA 5 - Port1 ATC2 - Port 1
DPA 5 - Port2 ATC2 - Port 2
DPA 6 - Port1 ATC2 - Port 3
DPA 6 - Port2 ATC Shelf 2 ATC2 - Port 4
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
DPA 9 - Port 2 ATC3 - Port 2
DPA 10 - Port1 ATC3 - Port 3
DPA 10 - Port2 ATC Shelf 3 ATC3 - Port 4 Duplexer
DPA 11 - Port1 ATC3 - Port 5
DPA 11 - Port 2 ATC3 - Port 6
DPA 12 - Port1 ATC3 - Port 7
DPA 12 - Port2 ATC3 - Port 8

Position 2

Position 3

Antenna
(Main receive)

Antenna
(Diversity
receive)

Note: Additional RF Frames with 21 channels or more are connected to

their respective TX/RX antennas in the same way as RF Frame 1.

411-2021-111 Standard 01.01 June 1996

Cell Site Layouts 3-7

Receive cabling

In the reverse path, the receive signal from the main antenna is connected to
the A-input of the Receive Multicoupler (RMC) through the receive port of
the duplexer. The diversity antenna connects directly to the B-input of the
RMC. Distribution of the reverse path frequencies is accomplished by RF
splitters within each RF frame.

Table 3-3 shows the connection between the RMC and the splitters.

Table 3-3
RMC to splitter connections for an Omni Metrocell

From Through To

Main antenna RMC 1A - A1 TRU Shelf 1 Splitter 1
Diversity antenna RMC 1B - B1 TRU Shelf 1 Splitter 4
Main antenna RMC 1A - A2 TRU Shelf 2 Splitter 1
Diversity antenna RMC 1B - B2 TRU Shelf 2 Splitter 4
Main antenna RMC 1A - A3 TRU Shelf 3 Splitter 1
Diversity antenna RMC 1B - B3 TRU Shelf 3 Splitter 4

Component requirement

Table 3-4 lists the components required for a Metrocell with one to five RF
Frames. An omni cell site requires only one Receive Multicoupler (RMC).

Table 3-4
Component requirement for an omni Metrocell

Configuration
with up to 20
channels per
RF Frame

Configuration
with up to 24
channels per
RF Frame

No. of RF

Frames

1 3 to 20 1 to 3 1 2 1 TX/RX, 1 RX
2 21 to 40 4 to 6 1 4 2 TX/RX
3 41 to 60 7 to 9 1 6 2 TX/RX, 1 TX
4 61 to 80 10 to 12 1 6 2 TX/RX, 2 TX
5 81 to 100 13 to 15 1 8 2 TX/RX, 3 TX
1 3 to 24 1 to 3 2 2 2 TX/RX
2 25 to 48 4 to 6 2 4 2 TX/RX, 2 TX
3 49 to 72 7 to 9 2 6 2 TX/RX, 4 TX
4 73 to 96 10 to 12 2 6 2 TX/RX, 6 TX
5 97 to 120 13 to 15 2 8 2 TX/RX, 8 TX

No. of

TRUs

No. of

ATCs

Note: An additional TCM port card is required for the DRUM, the ACU

and the CSM2.

Duplexer

per frame

ICRM TCM
Port cards

No. of

antennas

DMS-MTX DualMode Metrocell Cell Site Description

3-8 Cell Site Layouts

120 ° STSR cell site configuration

The Metrocell in a 120 ° STSR configuration uses at least two equipment
frames, one CE Frame and one RF frame (see Figure 3-4). Each TRU/DPA
Shelf and its associated ATC on the RF frame support one of the three sectors.
With only one RF frame, the maximum number of Voice Channels (VCH)
supported by each sector is six since two of the eight TRUs on the TRU shelf
have to be assigned as the Control Channel (CCH) and the Locate Channel
Receiver (LCR). A 120 ° STSR Metrocell with one RF Frame requires six
antennas; one TX/RX antenna and one RX only antenna for each sector (see
Figure 3-6). As traffic grows, two additional RF frames can be added to
accommodate more VCHs (see Figure 3-5).

A 120 ° STSR Metrocell with three RF Frames requires six antennas. It may
be three TX/RX antennas and three RX only antennas or six TX/RX antennas
depending on the number of channels in each RF Frame. An RF Frame with
20 channels or less in one sector requires one duplexer in the RF Frame and
one TX/RX antennas for that sector. The outputs of the three combiners are
combined through one phasing transformer (located at ATC 2) and connected
to Duplexer position 2 in that RF Frame. The output of the duplexer is then
connected to the main TX/RX Antenna of that sector).

An RF Frame with 21 channels or more in one sector requires two duplexers
in the RF Frame and two TX/RX antennas for that sector. The outputs of ATC
1 and ATC 2 are combined through one phasing transformer (located at ATC

2) and connected to Duplexer position 2 in that RF Frame. The output of the
duplexer is then connected to main TX/RX Antenna of that sector. The output
of ATC 3 is connected to Duplexer position 3 and then to the diversity TX/RX
Antenna of that sector. This arrangement is used to meet the requirement of a
minimum of 21 channel spacing (630 kHz) between the channels in one RF
Frame. Figure 3-5 shows the frame layout and Figure 3-7 shows the block
diagram of a 120 ° STSR Metrocell with three RF Frames.

Control Channel redundancy

Control Channel (CCH) redundancy is commonly provided with a Locate
Channel Receiver (LCR) backup. With one RF Frame, the CCH of each
sector is assigned to position 1 on the TRU/DPA Shelf of that sector and the
LCR is assigned to position 4 on the same shelf. With three RF Frames, the
CCH of each sector is assigned to position 1 on TRU/DPA Shelf 1 of that
sector and the LCR is assigned to position 4 on the same shelf. This
arrangement will have the CCH and the LCR supplied on a different DC
power feed and a TCM card. No RF coaxial switch is required since the
cavity of the LCR position on the ATC will tune to the CCH frequency when
backup is required.

411-2021-111 Standard 01.01 June 1996

Figure 3-4
Frame layout of a 120 ° STSR Metrocell site with one RF frame (front view)

CE Frame RF Frame 1

CE RIP

DRUM

ACU

HSMO

CSM 2
RMC 1 (Sector X)
RMC 2 (Sector Y)

RMC 3 (Sector Z)

Blank Panel

ICRM

Blank Panel

Base

RF RIP

Duplexer

Duplexer
Position 3 Position 2 Position 1
(Sector Z)

(Sector Y)

Duplexer

(Sector X)

ATC 3

(Sector Z)

DPA11DPA

12

TRU 22

TRU 21

DPA9DPA

TRU 18

TRU 17

(Sector Y)

DPA7DPA

TRU 14

TRU 13

DPA5DPA

TRU 9

TRU 10

ATC 2

TRU 23

10

TRU 19

8

TRU 15

6

TRU 11

ATC 1

(Sector X)

DPA3DPA

4

TRU 5

TRU 1

TRU 6

DPA1DPA

TRU 2

Base

TRU 7

2

TRU 3

TRU/DPA

TRU 24

Shelf 3

(Sector Z)

TRU 20

TRU/DPA

TRU 16

Shelf 2

(Sector Y)

TRU 12

TRU/DPA

TRU 8

Shelf 1

(Sector X)

TRU 4

Cell Site Layouts 3-9

Figure 3-5
Frame layout of a 120 ° STSR Metrocell site with three RF frames (front view)

CE Frame

CE RIP

DRUM

ACU

HSMO

CSM 2
RMC 1 (Sector X)
RMC 2 (Sector Y)

RMC 3 (Sector Z)

Blank Panel

ICRM

Blank Panel

Base

RF Frame 1

(Sector X)

RF RIP

Duplexer

Duplexer

Position 3

Position 2

ATC 3

DPA11DPA

TRU 22

TRU 21

DPA9DPA

TRU 18

TRU 17

ATC 2

DPA7DPA

TRU 14

TRU 13

DPA5DPA

TRU 9

TRU 10

ATC 1

DPA3DPA

TRU 6

TRU 5

DPA1DPA

TRU 2

TRU 1

Base

12

10

8

6

4

2

Duplexer

Position 1

TRU 23

TRU 19

TRU 15

TRU 11

TRU 7

TRU 3

TRU 24

TRU 20

TRU 16

TRU 12

TRU 8

TRU 4

RF Frame 2

(Sector Y)

RF RIP

Duplexer

Duplexer

Position 3

Position 2

ATC 3

DPA11DPA

TRU 21

TRU 22

DPA9DPA

TRU 18

TRU 17

ATC 2

DPA7DPA

TRU 14

TRU 13

DPA5DPA

TRU 9

TRU 10

ATC 1

DPA3DPA

TRU 6

TRU 5

DPA1DPA

TRU 2

TRU 1

Base

12

10

8

6

4

2

Duplexer

Position 1

TRU 23

TRU 19

TRU 15

TRU 11

TRU 7

TRU 3

TRU 24

TRU 20

TRU 16

TRU 12

TRU 8

TRU 4

RF Frame 3

(Sector Z)

RF RIP

Duplexer

Duplexer

Position 3

Position 2

ATC 3

DPA11DPA

TRU 21

TRU 22

DPA9DPA

TRU 18

TRU 17

ATC 2

DPA7DPA

TRU 13

TRU 14

DPA5DPA

TRU 9

TRU 10

ATC 1

DPA3DPA

TRU 6

TRU 5

DPA1DPA

TRU 2

TRU 1

Base

12

10

8

6

4

2

Duplexe

Position 1

TRU 23

TRU 19

TRU 15

TRU 11

TRU 7

TRU 3

TRU 24

TRU 20

TRU 16

TRU 12

TRU 8

TRU 4

TRU/DPA

Shelf 3

TRU/DPA

Shelf 2

TRU/DPA

Shelf 1

Note:

For a frame with up to 20 channels, only one duplexer (located in position

DMS-MTX DualMode Metrocell Cell Site Description

3-10 Cell Site Layouts

2) is required.
For a frame with 21 channels or more, two duplexers (located in positions
2 and 3) are required.

Figure 3-6
Block diagram of a 120 ° STSR Metrocell using one RF Frame

See Table 3-5 for

PA/ATC connection

Control Channel

for Sector X

ATC 1

ATC 2

ATC 3

TRU/DPA
Shelf 1

Control Channel

for Sector Y

TRU/DPA
Shelf 2

Control Channel

for Sector Z

TRU/DPA
Shelf 3

RF Frame 1

DPA 1

DPA 4

DPA 5

DPA 8

DPA 9

TRU 1

6 5 4 3 2 1

TRU 8

6 5 4 3 2 1

TRU 9

6 5 4 3 2 1

TRU 16

6 5 4 3 2 1

TRU 17

6 5 4 3 2 1

See Table 3-8 for

RMC/TRU Shelf connection

TRU SHELF

SPLITTER 1

TRU SHELF

SPLITTER 6

TRU SHELF

SPLITTER 1

TRU SHELF

SPLITTER 6

TRU SHELF

SPLITTER 1

Antenna

A1
A2
A3

A8
B1

B2
B3

B8

RX ANT

RMC 1A

RMC 1B

TX

Duplexer

Position 1

(Sector X

Main

receive)

Antenna
(Sector X
Diversity

receive)

Antenna

A1
A2
A3

A8
B1

B2
B3

B8

RX ANT

RMC 2A

RMC 2B

TX

Duplexer

Position 2

(Sector Y

Main

receive)

Antenna
(Sector Y
Diversity

receive)

Antenna

A1
A2
A3

A8
B1

B2
B3

B8

RX ANT

RMC 3A

RMC 3B

TX

Duplexer

Position 3

(Sector Z

Main

receive)

Antenna
(Sector Z
Diversity

receive)

DPA 12

TRU 24

6 5 4 3 2 1

ICRM HSMO

411-2021-111 Standard 01.01 June 1996

TRU SHELF

SPLITTER 6

CE Frame

Figure 3-7
Block diagram of a 120 ° STSR Metrocell using three RF Frames

Cell Site Layouts 3-11

See Tables 3-6 and 3-7

for PA/ATC connection

Control Channel

for Sector X

ATC 1

ATC 2

ATC 3

TRU/DPA
Shelf 1

TRU/DPA
Shelf 2

TRU/DPA
Shelf 3

RF Frame 1

DPA 1

DPA 4

DPA 5

DPA 8

DPA 9

Note 1

TRU 1

6 5 4 3 2 1

TRU 8

6 5 4 3 2 1

TRU 9

6 5 4 3 2 1

TRU 16

6 5 4 3 2 1

TRU 17

6 5 4 3 2 1

See Table 3-9 for

RMC/TRU Shelf connection

TRU SHELF

SPLITTER 1

TRU SHELF

SPLITTER 6

TRU SHELF

SPLITTER 1

TRU SHELF

SPLITTER 6

TRU SHELF

SPLITTER 1

Antenna

A1
A2
A3

RMC 1A

A8
B1

B2
B3

RMC 1B

B8

TX

Duplexer

RX ANT

Position 2

TX

Duplexer

RX ANT

Position 3

Note 2

(Sector X

Main

receive)

Antenna

(Sector X

Diversity

receive)

Antenna

A1
A2
A3

RMC 2A

A8
B1

B2
B3

RMC 2B

B8

TX

Duplexer

RX ANT

Position 2

RF Frame 2

TX

Duplexer

RX ANT

Position 3

(Sector Y

Main

receive)

Antenna

(Sector Y

Diversity

receive)

Antenna

A1
A2
A3

RMC 3A

A8
B1

B2
B3

RMC 3B

B8

TX

Duplexer

RX ANT

Position 2

RF Frame 3

TX

Duplexer

RX ANT

Position 3

(Sector Z

Main

receive)

Antenna
(Sector Z
Diversity

receive)

DPA 12

TRU 24

6 5 4 3 2 1

TRU SHELF

SPLITTER 6

ICRM HSMO

Notes:

1.2.For diagram clarity, only RF Frame 1 is shown. RF Frames 2 and 3
are connected and operated identically to that of RF Frame 1.
For RF Frames with 20 channels or less, the Duplexer in position 3 is
not required. The outputs of the three ATCs are combined together
and connected to the Duplexer in position 2. See Table 3-6.

DMS-MTX DualMode Metrocell Cell Site Description

CE Frame

3-12 Cell 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
Shelf 1

TRU/DPA
Shelf 2

DPA 2 - Port2 (LCR) ATC Shelf 1 ATC1 - Port 4 Duplexer
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 (CCH) ATC2 - Port 1
DPA 5 - Port2 ATC2 - Port 2
DPA 6 - Port1 ATC2 - Port 3
DPA 6 - Port2 (LCR) ATC Shelf 2 ATC2 - Port 4 Duplexer
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

Position 1

Position 2

Antenna
(Main receive
for Sector X)

Antenna
(Main receive
for Sector Y)

411-2021-111 Standard 01.01 June 1996

Table 3-5
PA to ATC connection for a 120 ° Metrocell with one RF Frame (continued)

From Through To

DPA 9 - Port1 (CCH) ATC3 - Port 1
DPA 9 - Port 2 ATC3 - Port 2
DPA 10 - Port1 ATC3 - Port 3

TRU/DPA
Shelf 3

DPA 10 - Port2 (LCR) ATC Shelf 3 ATC3 - Port 4 Duplexer
DPA 11 - Port1 ATC3 - Port 5
DPA 11 - Port2 ATC3 - Port 6
DPA 12 - Port1 ATC3 - Port 7
DPA 12 - Port2 ATC3 - Port 8

Position 3

Cell Site Layouts 3-13

Antenna
(Main receive
for Sector Z)

Table 3-6
PA to ATC connection for a 120 ° Metrocell with 20 channels or less per RF frame for one sector

From Through To

DPA 1 - Port1 (CCH) ATC1 - Port 1
DPA 1 - Port2 ATC1 - Port 2

RF Frame 1
TRU/DPA
Shelf 1

RF Frame 1
TRU/DPA
Shelf 2

RF Frame 1
TRU/DPA
Shelf 3

DPA 2 - Port1 ATC1 - Port 3
DPA 2 - Port2 (LCR) RF Frame 1
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 RF Frame 1
DPA 5 - Port2 ATC2 - Port 2
DPA 6 - Port1 ATC2 - Port 3
DPA 6 - Port2 RF Frame 1
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
DPA 9 - Port 2 RF Frame 1
DPA 10 - Port1 ATC3 - Port 3
DPA 10 - Port2 ATC3 - Port 4

ATC Shelf 1

ATC Shelf 2

ATC Shelf 3

ATC1 - Port 4

Duplexer
Position 2

ATC2 - Port 4

ATC3 - Port 2

Antenna
(Main receive
for Sector X)

DMS-MTX DualMode Metrocell Cell Site Description

3-14 Cell Site Layouts

Table 3-6
PA to ATC connection for a 120 ° Metrocell with 20 channels or less per RF frame for one sector
(continued)

From Through To

DPA 1 - Port1 (CCH) ATC1 - Port 1
DPA 1 - Port2 ATC1 - Port 2
DPA 2 - Port1 ATC1 - Port 3

RF Frame 2
TRU/DPA
Shelf 1

RF Frame 2
TRU/DPA
Shelf 2

RF Frame 2
TRU/DPA
Shelf 3

RF Frame 3
TRU/DPA
Shelf 1

RF Frame 3
TRU/DPA
Shelf 2

DPA 2 - Port2 (LCR) RF Frame 2
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 RF Frame 2
DPA 6 - Port1 ATC2 - Port 3
DPA 6 - Port2 RF Frame 2
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
DPA 9 - Port 2 RF Frame 2
DPA 10 - Port1 ATC3 - Port 3
DPA 10 - Port2 ATC3 - Port 4
DPA 1 - Port1 (CCH) ATC1 - Port 1
DPA 1 - Port2 ATC1 - Port 2
DPA 2 - Port1 ATC1 - Port 3
DPA 2 - Port2 (LCR) RF Frame 3
DPA 3 - Port1 ATC1 - Port 5
DPA 3 - Port2 ATC1 - Port 6
DPA 4 - Port1 ATC1 - Port 7 RF Frame 3
DPA 4 - Port2 ATC1 - Port 8
DPA 5 - Port1 ATC2 - Port 1
DPA 5 - Port2 ATC2 - Port 2
DPA 6 - Port1 RF Frame 3
DPA 6 - Port2 ATC2 - Port 4
DPA 7 - Port1 ATC2 - Port 5
DPA 7 - Port 2 ATC2 - Port 6

ATC Shelf 1

ATC Shelf 2

ATC Shelf 3

ATC Shelf 1

ATC Shelf 2

ATC1 - Port 4

ATC2 - Port 4

ATC3 - Port 2

ATC1 - Port 4

ATC2 - Port 3

Duplexer
Position 2

Duplexer
Position 2

Antenna
(Main receive
for Sector Y)

Antenna
(Main receive
for Sector Z)

411-2021-111 Standard 01.01 June 1996

Cell Site Layouts 3-15

Table 3-6
PA to ATC connection for a 120 ° Metrocell with 20 channels or less per RF frame for one sector
(continued)

From Through To

RF Frame 3
TRU/DPA
Shelf 2

RF Frame 3
TRU/DPA
Shelf 3

Table 3-7
PA to ATC connection for a 120 ° Metrocell with 21 channels or more per RF frame for one sector

RF Frame 1
TRU/DPA
Shelf 1

RF Frame 1
TRU/DPA
Shelf 2

RF Frame 1
TRU/DPA
Shelf 3

DPA 8 - Port1 RF Frame 3
DPA 8 - Port 2 ATC2 - Port 8

DPA 9 - Port1 ATC3 - Port 1 RF Frame 3
DPA 9 - Port 2 RF Frame 3
DPA 10 - Port1 ATC3 - Port 3
DPA 10 - Port2 ATC3 - Port 4

From Through To

DPA 1 - Port1 (CCH) ATC1 - Port 1
DPA 1 - Port2 ATC1 - Port 2
DPA 2 - Port1 ATC1 - Port 3
DPA 2 - Port2 (LCR) RF Frame 1
DPA 3 - Port1 ATC1 - Port 5
DPA 3 - Port2 ATC1 - Port 6
DPA 4 - Port1 ATC1 - Port 7 RF Frame 1
DPA 4 - Port2 ATC1 - Port 8
DPA 5 - Port1 ATC2 - Port 1
DPA 5 - Port2 ATC2 - Port 2
DPA 6 - Port1 ATC2 - Port 3
DPA 6 - Port2 RF Frame 1
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
DPA 9 - Port 2 ATC3 - Port 2
DPA 10 - Port1 ATC3 - Port 3
DPA 10 - Port2 RF Frame 1
DPA 11- Port1 ATC3 - Port 5
DPA 11- Port 2 ATC3 - Port 6
DPA 12 - Port1 ATC3 - Port 7
DPA 12 - Port2 ATC3 - Port 8

ATC 2

ATC Shelf 3

ATC Shelf 1

ATC Shelf 2

ATC Shelf 3

ATC2 - Port 7

ATC3 - Port 2

ATC1 - Port 4

ATC2 - Port 4

ATC3 - Port 4 RF Frame 1

Duplexer
Position 2

Duplexer
Position 2

Duplexer
Position 3

Antenna
(Main receive
for Sector Z)

Antenna
(Main receive
for Sector X)

Antenna
(Diversity
receive for
Sector X)

DMS-MTX DualMode Metrocell Cell Site Description

3-16 Cell Site Layouts

Table 3-7
PA to ATC connection for a 120 ° Metrocell with 21 channels or more per RF frame for one sector
(continued)

From Through To

DPA 1 - Port1 (CCH) ATC1 - Port 1
DPA 1 - Port2 ATC1 - Port 2
DPA 2 - Port1 ATC1 - Port 3

RF Frame 2
TRU/DPA
Shelf 1

RF Frame 2
TRU/DPA
Shelf 2

RF Frame 2
TRU/DPA
Shelf 3

RF Frame 3
TRU/DPA
Shelf 1

RF Frame 3
TRU/DPA
Shelf 2

DPA 2 - Port2 (LCR) RF Frame 2
DPA 3 - Port1 ATC1 - Port 5
DPA 3 - Port2 ATC1 - Port 6
DPA 4 - Port1 ATC1 - Port 7 RF Frame 2
DPA 4 - Port2 ATC1 - Port 8
DPA 5 - Port1 ATC2 - Port 1
DPA 5 - Port2 ATC2 - Port 2
DPA 6 - Port1 ATC2 - Port 3
DPA 6 - Port2 RF Frame 2
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
DPA 9 - Port 2 ATC3 - Port 2
DPA 10 - Port1 ATC3 - Port 3
DPA 10 - Port2 RF Frame 2
DPA 11- Port1 ATC3 - Port 5
DPA 11- Port 2 ATC3 - Port 6
DPA 12 - Port1 ATC3 - Port 7
DPA 12 - Port2 ATC3 - Port 8
DPA 1 - Port1 (CCH) ATC1 - Port 1
DPA 1 - Port2 ATC1 - Port 2
DPA 2 - Port1 ATC1 - Port 3
DPA 2 - Port2 (LCR) RF Frame 3
DPA 3 - Port1 ATC1 - Port 5 RF Frame 3
DPA 3 - Port2 ATC1 - Port 6
DPA 4 - Port1 ATC1 - Port 7
DPA 4 - Port2 ATC1 - Port 8
DPA 5 - Port1 RF Frame 3
DPA 5 - Port2 ATC2 - Port 2
DPA 6 - Port1 ATC2 - Port 3

ATC Shelf 1

ATC Shelf 2

ATC Shelf 3

ATC Shelf 1

ATC Shelf 2

ATC1 - Port 4

Duplexer
Position 2

ATC2 - Port 4

ATC3 - Port 4 RF Frame 2

Duplexer
Position 3

ATC1 - Port 4

Duplexer
Position 2

ATC2 - Port 1

Antenna
(Main receive
for Sector Y)

Antenna
(Diversity
receive for
Sector Y)

Antenna
(Main receive
for Sector Z)

411-2021-111 Standard 01.01 June 1996

Table 3-7
PA to ATC connection for a 120 ° Metrocell with 21 channels or more per RF frame for one sector
(continued)

From Through To

RF Frame 3
TRU/DPA
Shelf 2

RF Frame 3
TRU/DPA
Shelf 3

DPA 6 - Port2 RF Frame 3
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
DPA 9 - Port 2 ATC3 - Port 2
DPA 10 - Port1 ATC3 - Port 3
DPA 10 - Port2 RF Frame 3
DPA 11- Port1 ATC3 - Port 5
DPA 11- Port 2 ATC3 - Port 6
DPA 12 - Port1 ATC3 - Port 7
DPA 12 - Port2 ATC3 - Port 8

ATC Shelf 2

ATC Shelf 3

ATC2 - Port 4 RF Frame 3

ATC3 - Port 4 RF Frame 3

Cell Site Layouts 3-17

Antenna
Duplexer
Position 2

Duplexer
Position 3

(Main receive

for Sector Z)

Antenna

(Diversity

receive for

Sector Z)

Receive cabling

In the reverse path, the receive signal from the main antenna of each sector is
connected to the A-input of the Receive Multicoupler (RMC) through the
receive port of the duplexer of that sector. The diversity antenna connects
directly to the B-input of the RMC. Distribution of the reverse path
frequencies is accomplished by RF splitters within each RF frame.

Table 3-8 lists the connection between the RMCs and the RF splitters in a
120 ° STSR Metrocell with one RF Frame. Table 3-9 lists the connection
between the RMCs and the RF splitters in a 120 ° STSR Metrocell using three
RF frames.

Table 3-8
RMC to splitter connections for a 120 ° STSR Metrocell with one RF Frame

From Through To

Main antenna, Sector X RMC 1A - A1 Splitter 1
Main antenna, Sector Y RMC 2A - A1 Splitter 2

Sector X Main antenna, Sector Z RMC 3A - A1 TRU shelf 1 Splitter 3

Diversity antenna, Sector X RMC 1B - B1 Splitter 4
Diversity antenna, Sector Y RMC 2B - B1 Splitter 5
Diversity antenna, Sector Z RMC 3B - B1 Splitter 6

DMS-MTX DualMode Metrocell Cell Site Description

3-18 Cell Site Layouts

Table 3-8
RMC to splitter connections for a 120 ° STSR Metrocell with one RF Frame

From Through To

Main antenna, Sector X RMC 1A - A2 Splitter 1
Main antenna, Sector Y RMC 2A - A2 Splitter 2

Sector Y Main antenna, Sector Z RMC 3A - A2 TRU shelf 2 Splitter 3

Diversity antenna, Sector X RMC 1B - B2 Splitter 4
Diversity antenna, Sector Y RMC 2B - B2 Splitter 5
Diversity antenna, Sector Z RMC 3B - B2 Splitter 6
Main antenna, Sector X RMC 1A - A3 Splitter 1
Main antenna, Sector Y RMC 2A - A3 Splitter 2

Sector Z Main antenna, Sector Z RMC 3A - A3 TRU shelf 3 Splitter 3

Diversity antenna, Sector X RMC 1B - B3 Splitter 4
Diversity antenna, Sector Y RMC 2B - B3 Splitter 5
Diversity antenna, Sector Z RMC 3B - B3 Splitter 6

Table 3-9
RMC to splitter connections for a 120 ° STSR Metrocell with three RF Frames

From Through To

Main antenna, Sector X RMC 1A - A1 Splitter 1
Main antenna, Sector Y RMC 2A - A1 Splitter 2
Main antenna, Sector Z RMC 3A - A1 RF Frame 1
Diversity antenna, Sector X RMC 1B - B1 Splitter 4
Diversity antenna, Sector Y RMC 2B - B1 Splitter 5
Diversity antenna, Sector Z RMC 3B - B1 Splitter 6
Main antenna, Sector X RMC 1A - A2 Splitter 1
Main antenna, Sector Y RMC 2A - A2 Splitter 2

Sector X Main antenna, Sector Z RMC 3A - A2 RF Frame 1

Diversity antenna, Sector X RMC 1B - B2 Splitter 4
Diversity antenna, Sector Y RMC 2B - B2 Splitter 5
Diversity antenna, Sector Z RMC 3B - B2 Splitter 6
Main antenna, Sector X RMC 1A - A3 Splitter 1
Main antenna, Sector Y RMC 2A - A3 RF Frame 1
Main antenna, Sector Z RMC 3A - A3 Splitter 3
Diversity antenna, Sector X RMC 1B - B3 Splitter 4
Diversity antenna, Sector Y RMC 2B - B3 Splitter 5

TRU shelf 1

TRU shelf 2

TRU shelf 3

Splitter 3

Splitter 3

Splitter 2

411-2021-111 Standard 01.01 June 1996

Cell Site Layouts 3-19

Table 3-9
RMC to splitter connections for a 120 ° STSR Metrocell with three RF Frames (continued)

From Through To

Sector X Diversity antenna, Sector Z RMC 3B - B3 RF Frame 1

TRU Shelf 3
Main antenna, Sector X RMC 1A - A4 Splitter 1
Main antenna, Sector Y RMC 2A - A4 Splitter 2
Main antenna, Sector Z RMC 3A - A4 RF Frame 2
Diversity antenna, Sector X RMC 1B - B4 Splitter 4
Diversity antenna, Sector Y RMC 2B - B4 Splitter 5
Diversity antenna, Sector Z RMC 3B - B4 Splitter 6
Main antenna, Sector X RMC 1A - A5 Splitter 1
Main antenna, Sector Y RMC 2A - A5 Splitter 2

Sector Y Main antenna, Sector Z RMC 3A - A5 RF Frame 2

Diversity antenna, Sector X RMC 1B - B5 Splitter 4
Diversity antenna, Sector Y RMC 2B - B5 Splitter 5
Diversity antenna, Sector Z RMC 3B - B5 Splitter 6
Main antenna, Sector X RMC 1A - A6 Splitter 1
Main antenna, Sector Y RMC 2A - A6 Splitter 2
Main antenna, Sector Z RMC 3A - A6 RF Frame 2
Diversity antenna, Sector X RMC 1B - B6 Splitter 4
Diversity antenna, Sector Y RMC 2B - B6 Splitter 5
Diversity antenna, Sector Z RMC 3B - B6 Splitter 6
Main antenna, Sector X RMC 1A - A7 Splitter 1
Main antenna, Sector Y RMC 2A - A7 Splitter 2
Main antenna, Sector Z RMC 3A - A7 RF Frame 3
Diversity antenna, Sector X RMC 1B - B7 Splitter 4
Diversity antenna, Sector Y RMC 2B - B7 Splitter 5
Diversity antenna, Sector Z RMC 3B - B7 Splitter 6
Main antenna, Sector X RMC 1A - A8 Splitter 1

Sector Z Main antenna, Sector Y RMC 2A - A8 Splitter 2

Main antenna, Sector Z RMC 3A - A8 RF Frame 3
Diversity antenna, Sector X RMC 1B - B8 Splitter 4
Diversity antenna, Sector Y RMC 2B - B8 Splitter 5
Diversity antenna, Sector Z RMC 3B - B8 Splitter 6
Main antenna, Sector X RMC 1A - A9 RF Frame 3
Main antenna, Sector Y RMC 2A - A9 Splitter 2
Main antenna, Sector Z RMC 3A - A9 Splitter 3

TRU shelf 1

TRU shelf 2

TRU shelf 3

TRU shelf 1

TRU shelf 2

TRU shelf 3

Splitter 6

Splitter 3

Splitter 3

Splitter 3

Splitter 3

Splitter 3

Splitter 1

DMS-MTX DualMode Metrocell Cell Site Description

3-20 Cell Site Layouts

Table 3-9
RMC to splitter connections for a 120 ° STSR Metrocell with three RF Frames (continued)

From Through To

Diversity antenna, Sector X RMC 1B - B9 RF Frame 3

Sector Z Diversity antenna, Sector Y RMC 2B - B9 Splitter 5

Diversity antenna, Sector Z RMC 3B - B9 Splitter 6

TRU shelf 3

Splitter 4

Component requirement

Table 3-10 lists the components required for a 120 ° STSR Metrocell with one
RF Frame and Table 3-11 lists the components required for a 120 ° STSR
Metrocell with three RF Frames. Both configurations require three Receive
Multicouplers (RMC).

Table 3-10
Component requirement for a 120 ° STSR Metrocell with one RF Frame

No. of TRUs
per Sector

3 to 8 9 to 24 3 3 2 3 TX/RX, 3 RX

No. of TRUs No. of ATCs No. of

Duplexers

No. of ICRM
TCM Port
cards

No. of antennas

Note: An additional TCM port card is required for the DRUM, the ACU

and the CSM2.

Table 3-11
Component requirement for a 120 ° STSR Metrocell with three RF Frames

No. of TRUs
per Sector

3 to 20 9 to 60 9 3 6 3 TX/RX, 3 RX
21 to 24 63 to 72 9 6 6 6 TX/RX

No. of TRUs No. of ATCs No. of

Duplexers

No. of ICRM
TCM Port
cards

No. of antennas

Note: An additional TCM port card is required for the DRUM, the ACU

and the CSM2.

411-2021-111 Standard 01.01 June 1996

STSR cell site connection

The Metrocell in a 60 ° STSR configuration uses at least three equipment
frames, one CE Frame and two RF frames (see Figure 3-8). Each TRU/DPA
Shelf and its associated ATC on one of the two RF frames support one of the
six sectors. With only two RF frames, the maximum number of Voice
Channels (VCH) supported by each sector is six since two of the eight TRUs
on the TRU shelf have to be assigned as the Control Channel (CCH) and the
Locate Channel Receiver (LCR). A 60 ° STSR Metrocell with two RF Frames
requires twelve antennas; one TX/RX antenna and one RX only antenna for
each sector (see Figure 3-10). As traffic grows, two additional RF frames can
be added to accommodate more VCHs per sector (see Figure 3-9).

A 60 ° STSR Metrocell with four RF Frames has 16 channels for one sector
(including the CCH and the LCR) and each sector requires two TRU/DPA
shelves and two ATCs. It also requires twelve antennas; one TX/RX antenna
and one RX only antenna for each sector. The outputs of the two ATCs for
each sector are combined through one phasing transformer and connected to a
duplexer. The output of duplexer is then connected to the main TX/RX
Antenna of that sector. The diversity RX antenna of each sector is connected
directly to the Receive Multicoupler (RMC) of that sector. Figure 3-9 shows
the frame layout and Figure 3-11 shows the block diagram of a 60 ° STSR
Metrocell with four RF Frames.

60 °

Cell Site Layouts 3-21

Control Channel redundancy

Control Channel (CCH) redundancy is commonly provided with a Locate
Channel Receiver (LCR) backup. With two RF Frames, the CCH of each sector
is assigned to position 1 on the TRU/DPA Shelf of that sector and the LCR is
assigned to position 4 on the same shelf. With four RF Frames, a typical
assignment of the CCH and LCR for each sector is listed below:

Control Channel Locate Channel Receiver
Sector X RF Frame 1/TRU Shelf 1/Position 1 RF Frame 1/TRU Shelf 1/Position 4
Sector Y RF Frame 2/TRU Shelf 1/Position 1 RF Frame 2/TRU Shelf 1/Position 4
Sector Z RF Frame 2/TRU Shelf 3/Position 1 RF Frame 2/TRU Shelf 3/Position 4
Sector U RF Frame 3/TRU Shelf 1/Position 1 RF Frame 3/TRU Shelf 1/Position 4
Sector V RF Frame 4/TRU Shelf 1/Position 1 RF Frame 4/TRU Shelf 1/Position 4
Sector W RF Frame 3/TRU Shelf 3/Position 1 RF Frame 3/TRU Shelf 3/Position 4

This arrangement will have the CCH and the LCR supplied on a different DC
power feed and a TCM card. No RF coaxial switch is required since the
cavity of the LCR position on the ATC will tune to the CCH frequency when
backup is required.

DMS-MTX DualMode Metrocell Cell Site Description

3-22 Cell Site Layouts

Figure 3-8
Frame layout of a 60 ° STSR Metrocell with two RF frames (front view)

CE Frame RF Frame 1

CE RIP

DRUM

ACU

HSMO

CSM 2
RMC 1 (Sector X)
RMC 2 (Sector Y)

RMC 3 (Sector Z)
RMC 4 (Sector U)
RMC 5 (Sector V)
RMC 6 (Sector W)

ICRM

Blank Panel

Base

Duplexer

(Sector Z)

TRU 21

TRU 17

TRU 13

TRU 9

TRU 5

TRU 1

RF RIP

Duplexer

(Sector Y)

ATC 3

(Sector Z)

DPA11DPA

TRU 22

DPA9DPA

TRU 18

ATC 2

(Sector Y)

DPA7DPA

TRU 14

DPA5DPA

TRU 10

ATC 1

(Sector X)

DPA3DPA

TRU 6

DPA1DPA

TRU 2

Base

Duplexer
Position 1Position 2Position 3 Position 1Position 2Position 3
(Sector X)

TRU/DPA

12

TRU 23

TRU 24

Shelf 3

(Sector Z)

10

TRU 19

TRU 20

TRU/DPA

8

TRU 15

TRU 16

Shelf 2

(Sector Y)

6

TRU 11

TRU 12

TRU/DPA

4

TRU 8

TRU 7

Shelf 1

(Sector X)

2

TRU 4

TRU 3

RF Frame 2

RF RIP

Duplexer

Duplexer

(Sector V)

(Sector W)

ATC 3

(Sector W)

DPA11DPA

TRU 22

TRU 21

DPA9DPA

TRU 18

TRU 17

ATC 2

(Sector V)

DPA7DPA

TRU 14

TRU 13

DPA5DPA

TRU 9

TRU 10

ATC 1

(Sector U)

DPA3DPA

TRU 6

TRU 5

DPA1DPA

TRU 2

TRU 1

Base

12

10

8

6

4

2

Duplexer

(Sector U)

TRU 23

TRU 19

TRU 15

TRU 11

TRU 7

TRU 3

TRU/DPA

TRU 24

Shelf 3

(Sector W)

TRU 20

TRU/DPA

TRU 16

Shelf 2

(Sector V)

TRU 12

TRU/DPA

TRU 8

Shelf 1

(Sector U)

TRU 4

Figure 3-9
Typical frame layout of a 60 ° STSR Metrocell with four RF frames (front view)

RF Frame 4

(Sectors V & W)

RF RIP

DuplexerDuplexer

(Sector V)

ATC 3

(Sector W)

DPA11DPA

12

TRU 22

TRU 21

(Sector W)

DPA9DPA

TRU 17

TRU 18

(Sector V)

DPA7DPA

TRU 14

TRU 13

(Sector V)

DPA5DPA

TRU 9

TRU 10

(Sector V)

DPA3DPA

TRU 6

TRU 5

(Sector V)

DPA1DPA

TRU 2

TRU 1

ATC 2

ATC 1

Base

TRU 23

10

TRU 19

8

TRU 15

6

TRU 11

4

TRU 7

TRU 3

2

RF Frame 3

(Sectors U & W)

RF RIP

Duplexer

(Sector W)

TRU 24

TRU 20

TRU 16

TRU 12

TRU 8

TRU 4

TRU 21

TRU 17

TRU 13

TRU 9

TRU 5

TRU 1

Duplexer

(Sector U)

ATC 3

(Sector W)

DPA11DPA

12

TRU 22

(Sector W)

DPA9DPA

10

TRU 18

ATC 2

(Sector U)

DPA7DPA

8

TRU 14

(Sector U)

DPA5DPA

6

TRU 10

ATC 1

(Sector U)

DPA3DPA

4

TRU 6

(Sector U)

DPA1DPA

TRU 2

2

Base

DuplexerDuplexer
Position 1Position 2Position 3Position 1Position 2Position 3

CE Frame

TRU 23

TRU 24

RMC 1 (Sector X)
RMC 2 (Sector Y)

TRU 20

TRU 19

RMC 3 (Sector Z)
RMC 4 (Sector U)

RMC 5 (Sector V)

TRU 15

TRU 16

RMC 6 (Sector W)

TRU 11

TRU 12

TRU 8

TRU 7

Blank Panel

TRU 4

TRU 3

CE RIP

DRUM

ACU

HSMO
CSM 2

ICRM

Base

RF Frame 1

(Sectors X & Z)

RF RIP

Duplexer

(Sector X)

ATC 3

(Sector Z)

DPA11DPA

12

TRU 22

TRU 21

(Sector Z)

DPA9DPA

10

TRU 18

TRU 17

ATC 2

(Sector X)

DPA7DPA

8

TRU 14

TRU 13

(Sector X)

DPA5DPA

6

TRU 9

TRU 10

ATC 1

(Sector X)

DPA3DPA

4

TRU 6

TRU 5

(Sector X)

DPA1DPA

2

TRU 2

TRU 1

Base

RF Frame 2

(Sectors Y & Z)

Duplexer

DuplexerDuplexer

(Sector Z)

TRU 21

TRU 23

TRU 24

TRU 17

TRU 19

TRU 20

TRU 15

TRU 13

TRU 16

TRU 9

TRU 11

TRU 12

TRU 8

TRU 7

TRU 5

TRU 4

TRU 3

TRU 1

RF RIP

Duplexer

(Sector Y)

ATC 3

(Sector Z)

DPA11DPA

TRU 22

(Sector Z)

DPA9DPA

TRU 18

ATC 2

(Sector Y)

DPA7DPA

TRU 14

(Sector Y)

DPA5DPA

TRU 10

ATC 1

(Sector Y)

DPA3DPA

TRU 6

(Sector Y)

DPA1DPA

TRU 2

Base

Duplexer
Position 1Position 2Position 3Position 1Position 2Position 3

12

TRU 23

TRU 24

10

TRU 19

TRU 20

8

TRU 15

TRU 16

6

TRU 11

TRU 12

4

TRU 8

TRU 7

TRU 4

2

TRU 3

Note: A fifth RF Frame can be added for expanding three of the sectors to

24 channels.

411-2021-111 Standard 01.01 June 1996

Figure 3-10
Block diagram of a 60° STSR Metrocell with two RF Frames

Cell Site Layouts 3-23

See Table 3-12 for

PA/ATC connection

Control Channel

for Sector X

ATC 1

ATC 2

ATC 3

TRU/DPA
Shelf 1

Control Channel

for Sector Y

TRU/DPA
Shelf 2

Control Channel

for Sector Z

TRU/DPA
Shelf 3

RF Frame 1

DPA 1

DPA 4

DPA 5

DPA 8

DPA 9

See Table 3-14 for

RMC/TRU Shelf connection

TRU 1

6 5 4 3 2 1

TRU 8

6 5 4 3 2 1

TRU 9

6 5 4 3 2 1

TRU 16

6 5 4 3 2 1

TRU 17

6 5 4 3 2 1

TRU SHELF

SPLITTER 1

TRU SHELF

SPLITTER 6

TRU SHELF

SPLITTER 1

TRU SHELF

SPLITTER 6

TRU SHELF

SPLITTER 1

A1
A2
A3

A8
B1

B2
B3

B8

From
RMC 6B-B1

A1
A2
A3

A8
B1

B2
B3

B8

A1
A2
A3

A8
B1

B2
B3

B8

RX ANT

RMC 1A

RMC 1B

RX ANT

RMC 2A

RMC 2B

RX ANT

RMC 3A

RMC 3B

TX

Duplexer

Position 1

TX

Duplexer

Position 2

TX

Duplexer

Position 3

Antenna

(Sector X

Main

receive)

Antenna
(Sector X
Diversity

receive)

Antenna

(Sector Y

Main

receive)

Antenna
(Sector Y
Diversity

receive)

Antenna

(Sector Z

Main

receive)

Antenna
(Sector Z
Diversity

receive)

DPA 12

ICRM HSMO

TRU 24

6 5 4 3 2 1

TRU SHELF

SPLITTER 6

CE Frame

- continued -

DMS-MTX DualMode Metrocell Cell Site Description

3-24 Cell Site Layouts

Figure 3-10
Block diagram of a 60° STSR Metrocell with two RF Frames (continued)

See Table 3-12 for

PA/ATC connection

Control Channel

for Sector U

ATC 1

ATC 2

ATC 3

TRU/DPA
Shelf 1

Control Channel

for Sector V

TRU/DPA
Shelf 2

Control Channel

for Sector W

TRU/DPA
Shelf 3

RF Frame 2

DPA 1

DPA 4

DPA 5

DPA 8

DPA 9

TRU 1

6 5 4 3 2 1

TRU 8

6 5 4 3 2 1

TRU 9

6 5 4 3 2 1

TRU 16

6 5 4 3 2 1

TRU 17

6 5 4 3 2 1

See Table 3-14 for

RMC/TRU Shelf connection

TRU SHELF

SPLITTER 1

TRU SHELF

SPLITTER 6

TRU SHELF

SPLITTER 1

TRU SHELF

SPLITTER 6

TRU SHELF

SPLITTER 1

A1
A2
A3

A8
B1

B2
B3

B8

From
RMC 3B-B2

A1
A2
A3

A8
B1

B2
B3

B8

A1
A2
A3

A8
B1

B2
B3

B8

RX ANT

RMC 4A

RMC 4B

RX ANT

RMC 5A

RMC 5B

RX ANT

RMC 6A

RMC 6B

TX

Duplexer

Position 1

TX

Duplexer

Position 2

TX

Duplexer

Position 3

Antenna

(Sector U

Main

receive)

Antenna

(Sector U

Diversity

receive)

Antenna

(Sector V

Main

receive)

Antenna
(Sector V
Diversity

receive)

Antenna

(Sector W

Main

receive)

Antenna

(Sector W

Diversity

receive)

DPA 12

TRU 24

6 5 4 3 2 1

ICRM HSMO

411-2021-111 Standard 01.01 June 1996

TRU SHELF

SPLITTER 6

CE Frame

Figure 3-11
Block diagram of a 60° STSR Metrocell with four RF Frames

Cell Site Layouts 3-25

To Phasing
Transformer
on ATC3,
RF Frame 2

See Tables 3-13 for
PA/ATC connection

Control Channel

for Sector X

ATC 1

Sector X

ATC 2

Sector Z

ATC 3

TRU/DPA
Shelf 1

TRU/DPA
Shelf 2

TRU/DPA
Shelf 3

DPA 1

DPA 4

DPA 5

DPA 8

DPA 9

DPA 12

RF Frame 1

Note

TRU 9

TRU 1

6 5 4 3 2 1

TRU 8

6 5 4 3 2 1

6 5 4 3 2 1

TRU 16

6 5 4 3 2 1

TRU 17

6 5 4 3 2 1

TRU 24

6 5 4 3 2 1

See Table 3-15 for

RMC/TRU Shelf connection

TRU SHELF

SPLITTER 1

TRU SHELF

SPLITTER 6

TRU SHELF

SPLITTER 1

TRU SHELF

SPLITTER 6

TRU SHELF

SPLITTER 1

TRU SHELF

SPLITTER 6

A1
A2
A3

RMC 1A

A8
B1

B2
B3

RMC 1B

B8

A1
A2
A3

RMC 2A

A8
B1

B2
B3

RMC 2B

B8

From
RMC 3A-A4

A1
A2
A3

RMC 5A

A8
B1

B2
B3

RMC 5B

B8

A1
A2
A3

RMC 6A

A8
B1

B2
B3

RMC 6B

B8

TX

Duplexer

RX ANT

Position 2

TX

Duplexer

RX ANT

Position 2

RF Frame 2

TX

Duplexer

RX ANT

Position 2

RF Frame 4

TX

Duplexer

RX ANT

Position 3

RF Frame 3

Antenna

(Sector X

Main

receive)

Antenna

(Sector X

Diversity

receive)

Antenna

(Sector Y

Main

receive)

Antenna

(Sector Y

Diversity

receive)

Antenna

(Sector V

Main

receive)

Antenna
(Sector V
Diversity

receive)

Antenna

(Sector W

Main

receive)

Antenna

(Sector W

Diversity

receive)

ICRM HSMO

CE Frame

Note:

For diagram clarity, only RF Frames 1 and 2 are shown. RF Frames 3 and 4 are connected
and operated identically to that of RF Frames 1 and 2 respectively for Sectors U, V and W.
Refer to Tables 3-13 and 3-15 for the complete cabling information.

- continued -

DMS-MTX DualMode Metrocell Cell Site Description

3-26 Cell Site Layouts

Figure 3-11
Block diagram of a 60° STSR Metrocell with four RF Frames (continued)

From ATC 3 on

RF Frame 1

To Sector Z
Main Antenna
through
Duplexer 3 on
RF Frame 2

See Tables 3-13 for
PA/ATC connection

Control Channel

for Sector Y

ATC 1

TRU/DPA
Shelf 1

Sector Y

ATC 2

TRU/DPA
Shelf 2

Control Channel

for Sector Z

Sector Z

ATC 3

TRU/DPA
Shelf 3

DPA 1

DPA 4

DPA 5

DPA 8

DPA 9

DPA 12

RF Frame 2

Note

TRU 8

TRU 9

TRU 17

TRU 1

6 5 4 3 2 1

6 5 4 3 2 1

6 5 4 3 2 1

TRU 16

6 5 4 3 2 1

6 5 4 3 2 1

TRU 24

6 5 4 3 2 1

See Table 3-15 for

RMC/TRU Shelf connection

TRU SHELF

SPLITTER 1

TRU SHELF

SPLITTER 6

TRU SHELF

SPLITTER 1

TRU SHELF

SPLITTER 6

TRU SHELF

SPLITTER 1

TRU SHELF

SPLITTER 6

A1
A2
A3

RMC 1A

A8
B1

B2
B3

RMC 1B

B8

A1
A2
A3

RMC 2A

A8
B1

B2
B3

RMC 2B

B8

From
RMC 3A-A3

A1
A2
A3

RMC 5A

A8
B1

B2
B3

RMC 5B

B8

A1
A2
A3

RMC 6A

A8
B1

B2
B3

RMC 6B

B8

TX

Duplexer

RX ANT

Position 2

RF Frame 1

TX

Duplexer

RX ANT

Position 2

TX

Duplexer

RX ANT

Position 2

RF Frame 4

TX

Duplexer

RX ANT

Position 3

RF Frame 3

Antenna

(Sector X

Main

receive)

Antenna

(Sector X

Diversity

receive)

Antenna

(Sector Y

Main

receive)

Antenna

(Sector Y

Diversity

receive)

Antenna

(Sector V

Main

receive)

Antenna

(Sector V

Diversity

receive)

Antenna

(Sector W

Main

receive)

Antenna

(Sector W

Diversity

receive)

ICRM HSMO

Note:

For diagram clarity, only RF Frames 1 and 2 are shown. RF Frames 3 and 4 are connected
and operated identically to that of RF Frames 1 and 2 respectively for Sectors U, V and W.
Refer to Tables 3-13 and 3-15 for the complete cabling information.

411-2021-111 Standard 01.01 June 1996

CE Frame

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 60° STSR cell site with two RF Frames, each TRU/DPA Shelf and its
associated ATC and duplexer serve for one of the six sectors as listed below:

• Sector X RF Frame 1—TRU/DPA Shelf 1, ATC 1 and Duplexer 1

• Sector Y RF Frame 1—TRU/DPA Shelf 2, ATC 2 and Duplexer 2

• Sector Z RF Frame 1—TRU/DPA Shelf 3, ATC 3 and Duplexer 3

• Sector U RF Frame 2—TRU/DPA Shelf 1, ATC 1 and Duplexer 1

• Sector V RF Frame 2—TRU/DPA Shelf 2, ATC 2 and Duplexer 2

• Sector W RF Frame 2—TRU/DPA Shelf 3, ATC 3 and Duplexer 3

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 3-12 lists the
connection between the PAs and the ATC for a 60° STSR cell site using two
RF Frame for six sectors.

Cell Site Layouts 3-27

For a 60° STSR cell site with four RF Frames, the assignment of the equipment
for each sector is as listed below:

• Sector X RF Frame 1 —TRU/DPA Shelf 1, ATC 1

TRU/DPA Shelf 2, ATC 2 and Duplexer 2

• Sector Y RF Frame 2 —TRU/DPA Shelf 1, ATC 1

TRU/DPA Shelf 2, ATC 2 and Duplexer 2

• Sector Z RF Frame 1 —TRU/DPA Shelf 3, ATC 3

RF Frame 2 —TRU/DPA Shelf 3, ATC 3 and Duplexer 3

• Sector U RF Frame 3 —TRU/DPA Shelf 1, ATC 1

TRU/DPA Shelf 2, ATC 2 and Duplexer 2

• Sector V RF Frame 4 —TRU/DPA Shelf 1, ATC 1

TRU/DPA Shelf 2, ATC 2 and Duplexer 2

• Sector W RF Frame 3 —TRU/DPA Shelf 3, ATC 3 and Duplexer 3

RF Frame 4 —TRU/DPA Shelf 3, ATC 3

By adding one more RF Frame to this configuration, three of the six sectors
can be expanded to provide up to 24 channels (including the CCH and LCR).
With this additional RF Frame, the equipment and cabling may need to be
reassigned and rearranged. Table 3-12 lists the connection between the PAs
and the ATC for a 60° STSR configuration with two RF Frames and Table 3­13 lists the connection between the PAs and the ATC for a 60° STSR
configuration with four RF Frames.

DMS-MTX DualMode Metrocell Cell Site Description

3-28 Cell Site Layouts

Table 3-12
PA to ATC connection for a 60° STSR Metrocell using two RF Frames

From Through To

DPA 1 - Port1 (CCH) ATC1 - Port 1
DPA 1 - Port2 ATC1 - Port 2
DPA 2 - Port1 ATC1 - Port 3

RF Frame 1
TRU/DPA
Shelf 1

RF Frame 1
TRU/DPA
Shelf 2

RF Frame 1
TRU/DPA
Shelf 3

RF Frame 2
TRU/DPA
Shelf 1

DPA 2 - Port2 (LCH) RF Frame 1
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 (CCH) ATC2 - Port 1
DPA 5 - Port2 ATC2 - Port 2
DPA 6 - Port1 ATC2 - Port 3
DPA 6 - Port2 (LCH) RF Frame 1
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 (CCH) ATC3 - Port 1
DPA 9 - Port 2 ATC3 - Port 2
DPA 10 - Port1 ATC3 - Port 3
DPA 10 - Port2 (LCH) RF Frame 1
DPA 11 - Port1 ATC3 - Port 5
DPA 11 - Port2 ATC3 - Port 6
DPA 12 - Port1 ATC3 - Port 7
DPA 12 - Port2 ATC3 - Port 8
DPA 13 - Port1 (CCH) ATC4 - Port 1
DPA 13 - Port2 ATC4 - Port 2
DPA 14 - Port1 ATC4 - Port 3
DPA 14 - Port2 (LCH) RF Frame 2
DPA 15 - Port1 ATC4 - Port 5
DPA 15 - Port2 ATC4 - Port 6
DPA 16 - Port1 ATC4 - Port 7
DPA 16 - Port2 ATC4 - Port 8

ATC Shelf 1

ATC Shelf 2

ATC Shelf 3

ATC Shelf 1

ATC1 - Port 4 RF Frame 1

ATC2 - Port 4 RF Frame 1

ATC3 - Port 4 RF Frame 1

ATC4 - Port 4 RF Frame 2

Duplexer
Position 1

Duplexer
Position 2

Duplexer
Position 3

Duplexer
Position 1

Antenna
(Main receive
for Sector X)

Antenna
(Main receive
for Sector Y)

Antenna
(Main receive
for Sector Z)

Antenna
(Main receive
for Sector U)

411-2021-111 Standard 01.01 June 1996

Cell Site Layouts 3-29

Table 3-12
PA to ATC connection for a 60° STSR Metrocell using two RF Frames (continued)

From Through To

DPA 17 - Port1 (CCH) ATC5 - Port 1
DPA 17 - Port2 ATC5 - Port 2
DPA 18 - Port1 ATC5 - Port 3

RF Frame 2
TRU/DPA
Shelf 2

RF Frame 2
TRU/DPA
Shelf 3

DPA 18 - Port2 (LCH) RF Frame 2
DPA 19 - Port1 ATC5 - Port 5
DPA 19 - Port 2 ATC5 - Port 6
DPA 20 - Port1 ATC5 - Port 7
DPA 20 - Port 2 ATC5 - Port 8
DPA 21 - Port1 (CCH) ATC6 - Port 1
DPA 21 - Port 2 ATC6 - Port 2
DPA 22 - Port1 ATC6 - Port 3
DPA 22 - Port2 (LCH) RF Frame 2
DPA 23 - Port1 ATC6 - Port 5
DPA 23 - Port2 ATC6 - Port 6
DPA 24 - Port1 ATC6 - Port 7
DPA 24 - Port2 ATC6 - Port 8

ATC Shelf 2

ATC Shelf 3

ATC5 - Port 4 RF Frame 2

ATC6 - Port 4 RF Frame 2

Duplexer
Position 2

Duplexer
Position 3

Antenna
(Main receive
for Sector V)

Antenna
(Main receive
for Sector W)

DMS-MTX DualMode Metrocell Cell Site Description

3-30 Cell Site Layouts

Table 3-13
PA to ATC connection for a 60° STSR Metrocell using four RF Frames

From Through To

DPA 1 - Port1 (CCH) ATC1 - Port 1
DPA 1 - Port2 ATC1 - Port 2
DPA 2 - Port1 ATC1 - Port 3

RF Frame 1
TRU/DPA
Shelf 1

RF Frame 1
TRU/DPA
Shelf 2

RF Frame 2
TRU/DPA
Shelf 1

RF Frame 2
TRU/DPA
Shelf 2

DPA 2 - Port2 (LCH) RF Frame 1
DPA 3 - Port1 ATC1 - Port 5
DPA 3 - Port2 ATC1 - Port 6
DPA 4 - Port1 ATC1 - Port 7 RF Frame 1
DPA 4 - Port2 ATC1 - Port 8
DPA 5 - Port1 ATC2 - Port 1
DPA 5 - Port2 ATC2 - Port 2
DPA 6 - Port1 ATC2 - Port 3
DPA 6 - Port2 RF Frame 1
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 1 - Port1 (CCH) ATC1 - Port 1
DPA 1 - Port 2 ATC1 - Port 2
DPA 2 - Port1 ATC1 - Port 3
DPA 2 - Port2 (LCR) RF Frame 2
DPA 3 - Port1 ATC1 - Port 5
DPA 3 - Port 2 ATC1 - Port 6
DPA 4 - Port1 ATC1 - Port 7 RF Frame 2
DPA 4 - Port2 ATC1 - Port 8
DPA 5 - Port1 ATC2 - Port 1
DPA 5 - Port 2 ATC2 - Port 2
DPA 6 - Port1 ATC2 - Port 3
DPA 6 - Port2 RF Frame 2
DPA 7 - Port1 ATC2 - Port 5
DPA 7 - Port 2 ATC2 - Port 6
DPA 8 - Port1 ATC2 - Port 7
DPA 8 - Port2 ATC2 - Port 8

ATC Shelf 1

ATC Shelf 2

ATC Shelf 1

ATC Shelf 2

ATC1 - Port 4

Duplexer
Position 2

ATC2 - Port 4

ATC1 - Port 4

Duplexer
Position 2

ATC2 - Port 4

Antenna
(Main receive
for Sector X)

Antenna
(Main receive
for Sector Y)

411-2021-111 Standard 01.01 June 1996

Cell Site Layouts 3-31

Table 3-13
PA to ATC connection for a 60° STSR Metrocell using four RF Frames (continued)

From Through To

DPA 9 - Port1 ATC3 - Port 1
DPA 9 - Port2 ATC3 - Port 2
DPA 10 - Port1 ATC3 - Port 3

RF Frame 1
TRU/DPA
Shelf 3

RF Frame 2
TRU/DPA
Shelf 3

RF Frame 3
TRU/DPA
Shelf 1

RF Frame 3
TRU/DPA
Shelf 2

DPA 10 - Port2 RF Frame 1
DPA 11 - Port1 ATC3 - Port 5
DPA 11 - Port2 ATC3 - Port 6
DPA 12 - Port1 ATC3 - Port 7 RF Frame 2
DPA 12- Port2 ATC3 - Port 8
DPA 9 - Port1 (CCH) ATC3 - Port 1
DPA 9 - Port2 ATC3 - Port 2
DPA 10 - Port1 ATC3 - Port 3
DPA 10 - Port2 (LCH) RF Frame 2
DPA 11 - Port1 ATC3 - Port 5
DPA 11 - Port 2 ATC3 - Port 6
DPA 12 - Port1 ATC3 - Port 7
DPA 12 - Port 2 ATC3 - Port 8
DPA 1 - Port1 (CCH) ATC1 - Port 1
DPA 1 - Port 2 ATC1 - Port 2
DPA 2 - Port1 ATC1 - Port 3
DPA 2 - Port2 (LCR) RF Frame 3
DPA 3 - Port1 ATC1 - Port 5
DPA 3 - Port 2 ATC1 - Port 6
DPA 4 - Port1 ATC1 - Port 7 RF Frame 3
DPA 4 - Port2 ATC1 - Port 8
DPA 5 - Port1 ATC2 - Port 1
DPA 5 - Port 2 ATC2 - Port 2
DPA 6 - Port1 ATC2 - Port 3
DPA 6 - Port2 RF Frame 3
DPA 7 - Port1 ATC2 - Port 5
DPA 7 - Port 2 ATC2 - Port 6
DPA 8 - Port1 ATC2 - Port 7
DPA 8 - Port2 ATC2 - Port 8

ATC Shelf 3

ATC Shelf 3

ATC Shelf 1

ATC Shelf 2

ATC3 - Port 4

Duplexer
Position 3

ATC3 - Port 4

ATC1 - Port 4

Duplexer
Position 2

ATC2 - Port 4

Antenna
(Main receive
for Sector Z)

Antenna
(Main receive
for Sector U)

DMS-MTX DualMode Metrocell Cell Site Description

3-32 Cell Site Layouts

Table 3-13
PA to ATC connection for a 60° STSR Metrocell using four RF Frames (continued)

From Through To

DPA 1 - Port1 (CCH) ATC1 - Port 1
DPA 1 - Port 2 ATC1 - Port 2
DPA 2 - Port1 ATC1 - Port 3

RF Frame 4
TRU/DPA
Shelf 1

RF Frame 4
TRU/DPA
Shelf 2

RF Frame 3
TRU/DPA
Shelf 3

RF Frame 4
TRU/DPA
Shelf 3

DPA 2 - Port2 (LCR) RF Frame 4
DPA 3 - Port1 ATC1 - Port 5
DPA 3 - Port 2 ATC1 - Port 6
DPA 4 - Port1 ATC1 - Port 7 RF Frame 4
DPA 4 - Port2 ATC1 - Port 8
DPA 5 - Port1 ATC2 - Port 1
DPA 5 - Port 2 ATC2 - Port 2
DPA 6 - Port1 ATC2 - Port 3
DPA 6 - Port2 RF Frame 4
DPA 7 - Port1 ATC2 - Port 5
DPA 7 - Port 2 ATC2 - Port 6
DPA 8 - Port1 ATC2 - Port 7
DPA 8 - Port2 ATC2 - Port 8
DPA 9 - Port1 (CCH) ATC3 - Port 1
DPA 9 - Port2 ATC3 - Port 2
DPA 10 - Port1 ATC3 - Port 3
DPA 10 - Port2 (LCH) RF Frame 3
DPA 11 - Port1 ATC3 - Port 5
DPA 11 - Port2 ATC3 - Port 6
DPA 12 - Port1 ATC3 - Port 7 RF Frame 3
DPA 12- Port2 ATC3 - Port 8
DPA 9 - Port1 ATC3 - Port 1
DPA 9 - Port2 ATC3 - Port 2
DPA 10 - Port1 ATC3 - Port 3
DPA 10 - Port2 RF Frame 4
DPA 11 - Port1 ATC3 - Port 5
DPA 11 - Port 2 ATC3 - Port 6
DPA 12 - Port1 ATC3 - Port 7
DPA 12 - Port 2 ATC3 - Port 8

ATC Shelf 1

ATC Shelf 2

ATC Shelf 3

ATC Shelf 3

ATC1 - Port 4

Duplexer
Position 2

ATC2 - Port 4

ATC3 - Port 4

Duplexer
Position 3

ATC3 - Port 4

Antenna
(Main receive
for Sector V)

Antenna
(Main receive
for Sector W)

411-2021-111 Standard 01.01 June 1996

Cell Site Layouts 3-33

Receive cabling

In the reverse path, the receive signal from the main antenna of each sector is
connected to the A-input of the Receive Multicoupler (RMC) through the
receive port of the duplexer of that sector. The diversity antenna connects
directly to the B-input of the RMC. Distribution of the reverse path
frequencies is accomplished by RF splitters within each RF frame.

Table 3-14 lists the connection between the RMCs and the RF splitters in a
60° STSR Metrocell with two RF Frames. Table 3-15 lists the connection
between the RMCs and the RF splitters in a 60° STSR Metrocell using four
RF frames.

Table 3-14
RMC to splitter connections for a 60° STSR Metrocell with two RF Frames

From Through To

Main antenna, Sector X — primary sector RMC 1A - A1 Splitter 1
Main antenna, Sector Y — right adjacent sector RMC 2A - A1 Splitter 2

Sector X Main antenna, Sector U — rear sector RMC 4A - A1 RF Frame 1

Diversity antenna, Sector X — primary sector RMC 1B - B1 Splitter 4
Diversity antenna, Sector U — rear sector RMC 4B - B1 Splitter 5
Diversity antenna, Sector W — left adjacent sector RMC 6B - B1 Splitter 6
Main antenna, Sector Y — primary sector RMC 2A - A2 Splitter 1
Main antenna, Sector Z — right adjacent sector RMC 3A - A1 Splitter 2

Sector Y Main antenna, Sector V — rear sector RMC 5A - A1 RF Frame 1

Diversity antenna, Sector Y — primary sector RMC 2B - B1 Splitter 4
Diversity antenna, Sector V — rear sector RMC 5B - B1 Splitter 5
Diversity antenna, Sector X — left adjacent sector RMC 1B - B2 Splitter 6
Main antenna, Sector Z — primary sector RMC 3A - A2 Splitter 1
Main antenna, Sector U — right adjacent sector RMC 4A - A2 Splitter 2

Sector Z Main antenna, Sector W — rear sector RMC 6A - A1 RF Frame 1

Diversity antenna, Sector Z — primary sector RMC 3B - B1 Splitter 4
Diversity antenna, Sector W — rear sector RMC 6B - B2 Splitter 5
Diversity antenna, Sector Y — left adjacent sector RMC 2B - B2 Splitter 6
Main antenna, Sector U — primary sector RMC 4A - A3 Splitter 1
Main antenna, Sector V — right adjacent sector RMC 5A - A2 Splitter 2

Sector U Main antenna, Sector X — rear sector RMC 1A - A2 RF Frame 2

Diversity antenna, Sector U — primary sector RMC 4B - B2 Splitter 4
Diversity antenna, Sector X — rear sector RMC 1B - B3 Splitter 5
Diversity antenna, Sector Z — left adjacent sector RMC 3B - B2 Splitter 6

TRU shelf 1

TRU shelf 2

TRU shelf 3

TRU shelf 1

Splitter 3

Splitter 3

Splitter 3

Splitter 3

DMS-MTX DualMode Metrocell Cell Site Description

3-34 Cell Site Layouts

Table 3-14
RMC to splitter connections for a 60° STSR Metrocell with two RF Frames (continued)

From Through To

Main antenna, Sector V — primary sector RMC 5A - A3 Splitter 1
Main antenna, Sector W — right adjacent sector RMC 6A - A2 Splitter 2

Sector V Main antenna, Sector Y — rear sector RMC 2A - A3 RF Frame 2

Diversity antenna, Sector V — primary sector RMC 5B - B2 Splitter 4
Diversity antenna, Sector Y — rear sector RMC 2B - B3 Splitter 5
Diversity antenna, Sector U — left adjacent sector RMC 4B - B3 Splitter 6
Main antenna, Sector W — primary sector RMC 6A - A3 Splitter 1
Main antenna, Sector X — right adjacent sector RMC 1A - A3 Splitter 2

Sector W Main antenna, Sector Z — rear sector RMC 3A - A3 RF Frame 2

Diversity antenna, Sector W — primary sector RMC 6B - B3 Splitter 4
Diversity antenna, Sector Z — rear sector RMC 3B - B3 Splitter 5
Diversity antenna, Sector V — left adjacent sector RMC 5B - B3 Splitter 6

Table 3-15
RMC to splitter connections for a 60° STSR Metrocell with four RF Frames

TRU shelf 2

TRU shelf 3

Splitter 3

Splitter 3

From Through To

Main antenna, Sector X — primary sector RMC 1A - A1 Splitter 1
Main antenna, Sector Y — right adjacent sector RMC 2A - A1 Splitter 2
Main antenna, Sector U — rear sector RMC 4A - A1 RF Frame 1
Diversity antenna, Sector X — primary sector RMC 1B - B1 Splitter 4
Diversity antenna, Sector U — rear sector RMC 4B - B1 Splitter 5

Sector X Diversity antenna, Sector W — left adjacent sector RMC 6B - B1 Splitter 6

Main antenna, Sector X — primary sector RMC 1A - A2 Splitter 1
Main antenna, Sector Y — right adjacent sector RMC 2A - A2 Splitter 2
Main antenna, Sector U — rear sector RMC 4A - A2 RF Frame 1
Diversity antenna, Sector X — primary sector RMC 1B - B2 Splitter 4
Diversity antenna, Sector U — rear sector RMC 4B - B2 Splitter 5
Diversity antenna, Sector W — left adjacent sector RMC 6B - B2 Splitter 6
Main antenna, Sector Y — primary sector RMC 2A - A3 Splitter 1
Main antenna, Sector Z — right adjacent sector RMC 3A - A1 Splitter 2

Sector Y Main antenna, Sector V — rear sector RMC 5A - A1 RF Frame 2

Diversity antenna, Sector Y — primary sector RMC 2B - B1 Splitter 4
Diversity antenna, Sector V — rear sector RMC 5B - B1 Splitter 5
Diversity antenna, Sector X — left adjacent sector RMC 1B - B3 Splitter 6

TRU shelf 1

TRU shelf 2

TRU shelf 1

Splitter 3

Splitter 3

Splitter 3

411-2021-111 Standard 01.01 June 1996

Cell Site Layouts 3-35

Table 3-15
RMC to splitter connections for a 60° STSR Metrocell with four RF Frames (continued)

From Through To

Main antenna, Sector Y — primary sector RMC 2A - A4 Splitter 1
Main antenna, Sector Z — right adjacent sector RMC 3A - A2 Splitter 2

Sector Y Main antenna, Sector V — rear sector RMC 5A - A2 RF Frame 2

Diversity antenna, Sector Y — primary sector RMC 2B - B2 Splitter 4
Diversity antenna, Sector V — rear sector RMC 5B - B2 Splitter 5
Diversity antenna, Sector X — left adjacent sector RMC 1B - B4 Splitter 6
Main antenna, Sector Z — primary sector RMC 3A - A3 Splitter 1
Main antenna, Sector U — right adjacent sector RMC 4A - A3 Splitter 2
Main antenna, Sector W — rear sector RMC 6A - A1 RF Frame 2
Diversity antenna, Sector Z — primary sector RMC 3B - B1 Splitter 4
Diversity antenna, Sector W — rear sector RMC 6B - B3 Splitter 5

Sector Z Diversity antenna, Sector Y — left adjacent sector RMC 2B - B3 Splitter 6

Main antenna, Sector Z — primary sector RMC 3A - A4 Splitter 1
Main antenna, Sector U — right adjacent sector RMC 4A - A4 Splitter 2
Main antenna, Sector W — rear sector RMC 6A - A2 RF Frame 1
Diversity antenna, Sector Z — primary sector RMC 3B - B2 Splitter 4
Diversity antenna, Sector W — rear sector RMC 6B - B4 Splitter 5
Diversity antenna, Sector Y — left adjacent sector RMC 2B - B4 Splitter 6
Main antenna, Sector U — primary sector RMC 4A - A5 Splitter 1
Main antenna, Sector V — right adjacent sector RMC 5A - A3 Splitter 2
Main antenna, Sector X — rear sector RMC 1A - A3 RF Frame 3
Diversity antenna, Sector U — primary sector RMC 4B - B3 Splitter 4
Diversity antenna, Sector X — rear sector RMC 1B - B5 Splitter 5

Sector U Diversity antenna, Sector Z — left adjacent sector RMC 3B - B3 Splitter 6

Main antenna, Sector U — primary sector RMC 4A - A6 Splitter 1
Main antenna, Sector V — right adjacent sector RMC 5A - A4 Splitter 2
Main antenna, Sector X — rear sector RMC 1A - A4 RF Frame 3
Diversity antenna, Sector U — primary sector RMC 4B - B4 Splitter 4
Diversity antenna, Sector X — rear sector RMC 1B - B6 Splitter 5
Diversity antenna, Sector Z — left adjacent sector RMC 3B - B4 Splitter 6

TRU shelf 2

TRU shelf 3

TRU shelf 3

TRU shelf 1

TRU shelf 2

Splitter 3

Splitter 3

Splitter 3

Splitter 3

Splitter 3

DMS-MTX DualMode Metrocell Cell Site Description

3-36 Cell Site Layouts

Table 3-15
RMC to splitter connections for a 60° STSR Metrocell with four RF Frames (continued)

From Through To

Main antenna, Sector V — primary sector RMC 5A - A5 Splitter 1
Main antenna, Sector W — right adjacent sector RMC 6A - A3 Splitter 2
Main antenna, Sector Y — rear sector RMC 2A - A5 RF Frame 4
Diversity antenna, Sector V — primary sector RMC 5B - B3 Splitter 4
Diversity antenna, Sector Y — rear sector RMC 2B - B5 Splitter 5

Sector V Diversity antenna, Sector U — left adjacent sector RMC 4B - B5 Splitter 6

Main antenna, Sector V — primary sector RMC 5A - A6 Splitter 1
Main antenna, Sector W — right adjacent sector RMC 6A - A4 Splitter 2
Main antenna, Sector Y — rear sector RMC 2A - A6 RF Frame 4
Diversity antenna, Sector V — primary sector RMC 5B - B4 Splitter 4
Diversity antenna, Sector Y — rear sector RMC 2B - B6 Splitter 5
Diversity antenna, Sector U — left adjacent sector RMC 4B - B6 Splitter 6
Main antenna, Sector W — primary sector RMC 6A - A5 Splitter 1
Main antenna, Sector X — right adjacent sector RMC 1A - A5 Splitter 2
Main antenna, Sector Z — rear sector RMC 3A - A5 RF Frame 3
Diversity antenna, Sector W — primary sector RMC 6B - B5 Splitter 4
Diversity antenna, Sector Z — rear sector RMC 3B - B5 Splitter 5

Sector W Diversity antenna, Sector V — left adjacent sector RMC 5B - B5 Splitter 6

Main antenna, Sector W — primary sector RMC 6A - A6 Splitter 1
Main antenna, Sector X — right adjacent sector RMC 1A - A6 Splitter 2
Main antenna, Sector Z — rear sector RMC 3A - A6 RF Frame 4
Diversity antenna, Sector W — primary sector RMC 6B - B6 Splitter 4
Diversity antenna, Sector Z — rear sector RMC 3B - B6 Splitter 5
Diversity antenna, Sector V — left adjacent sector RMC 5B - B6 Splitter 6

TRU shelf 1

TRU shelf 2

TRU shelf 3

TRU shelf 3

Splitter 3

Splitter 3

Splitter 3

Splitter 3

411-2021-111 Standard 01.01 June 1996

Component requirement

Table 3-16 lists the components required for a 60° STSR Metrocell with two
RF Frame and Table 3-17 lists the components required for a 60° STSR
Metrocell with four RF Frames. Both configurations require six Receive
Multicouplers (RMC).

Table 3-16
Component requirement for a 60° STSR Metrocell with two RF Frames

Cell Site Layouts 3-37

No. of TRUs
per Sector

3 to 8 18 to 48 6 6 4 6 TX/RX, 6 RX

No. of TRUs No. of ATCs No. of

Duplexers

No. of ICRM
TCM Port
cards

No. of antennas

Note: An additional TCM port card is required for the DRUM, the ACU
and the CSM2.

Table 3-17
Component requirement for a 60° STSR Metrocell with four RF Frames

No. of TRUs
per Sector

3 to 16 18 to 96 12 6 6 6 TX/RX, 6 RX

No. of TRUs No. of ATCs No. of

Duplexers

No. of ICRM
TCM Port
cards

No. of antennas

Note: An additional TCM port card is required for the DRUM, the ACU
and the CSM2.

DMS-MTX DualMode Metrocell Cell Site Description

3-38 Cell Site Layouts

411-2021-111 Standard 01.01 June 1996

4-1

4

Cell Site Components

This chapter provides information on the description and Product
Engineering Codes (PEC) of the major components used in a DualMode
Metrocell.

Table 4-1
Major components of a DualMode Metrocell

Note:

FRU = Field Replaceable Unit

Description PEC
Metro RF Frame

"A" DC Power Cable Harness NTFB0901
"B" DC Power Cable Harness NTFB0902
Metro RF Rack Interface Panel (RIP) Shelf NTFB11AA FRU
Duplexer NTFB16AA FRU
AutoTune Combiner (ATC) NTFB17AA FRU
ATC Phasing Transformer NTFB18AA FRU
ATC Transformer Phasing Cable, A-Band NTFB1801 FRU
ATC Transformer Phasing Cable, B-Band NTFB1802 FRU
ATC Phasing Cable, A-Band NTFB19AA FRU
ATC Phasing Cable, B-Band NTFB19AB FRU
ATC Shorting Stub NTFB20AA FRU
ATC-Duplexer Cable 1 NTFB21AA FRU
ATC-Duplexer Cable 2 NTFB21AB FRU
ATC-Duplexer Cable 3 NTFB21AC FRU
TRU/DPA Shelf NTFB23AA FRU
TRU/DPA Shelf Fan Module Assembly NTFB24AA FRU
PA-ATC Coax Cable Assembly 1-4 NTFB34AA FRU
PA-ATC Coax Cable Assembly 5-8 NTFB34AB FRU
TRU/PA- ATC Alarm Cable NTFB35AA FRU

NTFB10AA

DMS-MTX DualMode Metrocell Cell Site Description

4-2 Cell Site Components

Table 4-1
Major components of a DualMode Metrocell

Note:

FRU = Field Replaceable Unit

Description PEC

Cable DATA 25-Pair TRU/DPA Shelf 1 NTFA1004 FRU
Cable DATA 25-Pair TRU/DPA Shelf 2 NTFA1008 FRU
Cable DATA 25-Pair TRU/DPA Shelf 3 NTFA1009 FRU
Transmit Receive Unit (TRU) NTAX98AA FRU
Dual Power Amplifier (DPA) NTFB38AA FRU
CE Frame Alarm Cable NTFB41AA FRU

Universal CE Frame

Universal CE RIP Shelf
DualMode Radio Unit Monitor (DRUM)

—sniffer
—whip antenna

Alarm Control Unit (ACU) NT3P20GA FRU

Output Contact card NT3P20EA FRU

Enhanced ACU Input card
High Stability Master Oscillator (HSMO) NT3P20JB FRU
Cell Site Monitor 2 (CSM2) NT3P70AB FRU

M6200 Handset NT3P75AB FRU

Handset coil cord NT3P78AB FRU
Receive Multicoupler (RMC) NT3P20HP FRU
Integrated Cellular Remote Module (ICRM) NTAX8607 FRU

Port (RMDP) card NTAX47BA FRU

Controller (RMCP) card NTAX89AA FRU

Time Switch (RMTS) card NTAX88AA FRU

(RMTC) card NTAX88CA FRU

DS1 Interface card NT6X50AB FRU

E1 Interface card NT6X27BB FRU

Power convertor NT2X70CA FRU
ICRM FSP Shelf NTAX90AB FRU

Alarm (RMAC) card NTAX92AA FRU

TCM-RS232 Conversion (RMTP) card NTAX91AA FRU

NT3P64CA

NTAX40DA
NTAX40CA

NT3P20FB FRU

FRU

411-2021-111 Standard 01.01 June 1996

Customer Service Operations

Most of these components can be ordered from Nortel. Contact the following
Nortel Customer Service Operations (CSO) when replacement is required:

For United States customers:
Northern Telecom Inc.

Attn. Customer Service Operations
400 N. Industrial
Richardson, Texas 75081

For Bell Canada customers:
Northern Telecom Canada Ltd.

Customer Service Operations
c/o Wesbell Transport
1630 Trinity Rd., Unit #3, Door #4
Mississauga, Ontario L5T 1L6
Attn.: Replacement and Repair Operations
Dept.: S898

Cell Site Components 4-3

For Mexico customers:
Northern Telecom de Mexico

Toltecas #113
Col. San Pedro De Los Pinos
Casi Esq Calle 4
Mexico

For Asia Pacific customers:
Northern Telecom Asia Pacific Ltd.

Attn.: Technical Assistance Service
Warwick House 17/F
28 Tong Chong Street
Quarry Bay, Hong Kong

For Non-Bell Canada/CALA/International customers:
Northern Telecom Canada Ltd.

Customer Service Operations
c/o Wesbell Transport
1630 Trinity Rd., Unit #3, Door #4
Mississauga, Ontario L5T 1L6
Attn.: Replacement and Repair Operations
Dept.: S898

DMS-MTX DualMode Metrocell Cell Site Description

4-4 Cell Site Components

411-2021-111 Standard 01.01 June 1996

5-1

5

Power and Grounding Requirements

Cell sites are built to house communication equipment of the cellular
telephone network. Cellular equipment can be located in stand-alone sites or
in larger buildings in urban areas. Cellular equipment is traditionally powered
from a +24 Vdc power plant. Some switching equipment can also be located
in a cell site. It is connected with other equipment through CO cables. RF
signals are transmitted using coaxial cables through areal antennas. Since cell
sites are susceptible to lightning strikes, extra precautions have to take place
to ensure the operation.

Safety requirements

Safety standards for installation and maintenance of electrical equipment are
the object of the national codes; Canadian Electrical Code (CEC) in Canada
and the National Electrical Code (NEC) in the USA. Although these codes do
not govern installations of communication equipment under the exclusive
control of communication utilities, it is good design and installation practice
for the new equipment or system to comply with the intent of the appropriate
Code. For systems installed at the customer premises outside of the above
communication utilities, compliance with the Code is mandatory.

One of the basic safety rules of the national codes (CEC and NEC) in North
America, for example, requires that there shall be no objectionable current on
the Framework Ground conductor (grounding conductor). In practice, this
usually means no measurable current.

In view of the above, communication equipment shall use a three wire
distribution system as required by the codes (system with separated
grounding such as Floor Ground and grounded conductor such as Battery
Return or the neutral) rather than two wire power distribution system (system
with joined grounding and grounded conductor).

Note: Countries outside North America may have different safety

standards codes. Follow the safety standards for installation and

maintenance of electrical equipment in your country accordingly.

DMS-MTX DualMode Metrocell Cell Site Description

5-2 Power and Grounding Requirements

Power and grounding requirements

Typical cell site radio equipment is powered by a +24 Vdc power system.
However, the primary power for a DualMode Metrocell is +27 Vdc nominal.
The reason that +27 Volts is specified as the nominal voltage rather than +24
Volts is to highlight that the system requires the full float voltage level to
enable it to deliver its fully rated available transmit RF output power level.
When AC power is lost and the voltage level to the system is reduced to the
nominal battery (that is, +24 Vdc), the power amplifiers will automatically
step down their transmit RF output power. See the Dual Power Amplifier
(DPA) section in NTP 411-2021-113 Metrocell Radio Frequency (RF) Frame

Description for details.

The power plant normally consists of a negative grounded 12-cell Valve
Regulated Lead-Acid (VRLA) battery plant and AC powered battery charging
units commonly referred to as the rectifiers. Under normal operating
conditions, that is, when AC power is available, the batteries are maintained
within their specified float voltage range via the rectifiers which must supply
current to power the system and keep the batteries charged. When an AC
outage occurs, the battery plant provides back-up power to the system.
However, at this time, the system will experience a step drop in voltage due to
a battery plant transition from the float state to the fully charged state. During
the battery discharge period, the voltage supplied to the system will gradually
drop from its fully charged voltage.

Under normal operating conditions an equalizing charge is not required. An
equalizing charge is a special charge given to a battery when non-uniformity
in voltage has developed between cells. It is given to restore all units to a
fully charged condition by using a charging voltage higher than the normal
float voltage and for a specified number of hours as determined by the specific
voltage used. An equalize charge is also often applied when a recharge of the
batteries is required in a minimum time following an emergency discharge.

A typical operating voltage range at the Power Distribution Plant of a
Metrocell should not exceed the range between +22.8 Vdc to +29 Vdc. +22.8
Vdc assumes 1 V drop from the batteries to the Rack Interface Panel (RIP)
and 0.8 V from the RIP to the load. The operating voltage range of a specific
system could vary.

The power plant supplies two (designated as ‘A’ and ‘B’) power feeds to each
Metrocell frame. Table 5-1 lists the performance requirements related to
primary DC power in a Metrocell.

411-2021-111 Standard 01.01 June 1996

±

Power and Grounding Requirements 5-3

Table 5-1
Metrocell DC Power performance requirements

Description Requirements

Maximum Nominal Minimum
Module or unit level operating voltage range 29.00 Vdc 27.00 Vdc 21.00 Vdc
Metro RF Frame current draw per feed (A or B) with all PAs

transmitting at full RF output power
Metro RF Frame power distribution voltage drop (from the

feed input at the RIP to any module)
Metro RF Frame power distribution resistance (from the

feed input at the RIP to any module)
Metro RF Frame operating voltage range (measured at the

RIP power feed input)
Metro RF Frame minimum voltage to guarantee maximum

PA RF power is available (measured at the RIP power feed
input)

Power Plant normal operating "Float" voltage range 27.60 Vdc 27.25 Vdc 27.00 Vdc
Power Plant "Equalize" voltage (one to two days) 29.00 Vdc
Power Plant voltage drop 0.25 Vdc
Maximum power feed length (measured from Metro RF

Frame RIP to Power Plant breaker

#2/0 AWG or Welding Copper Wire
#1/0 AWG or Welding Copper Wire

Absolute maximum voltage (no damage, non-operational,
applied continuously)

Transient voltage immunity (Metro RF Frame modules) for
300 µ s

Noise from battery (system and module immunity)

into 600 Ohms
from 10 kHz to 20 MHz in 3 kHz BW into 50 Ohms

from dc to 100 MHz into Hi-Z

Noise to battery (system and module emissions)

from 300 Hz to 10 kHz (where Ip is the steady state
dc current draw)
from 10 kHz to 1 MHz

Broadband noise

Battery step (system and module immunity) within nominal
operating range with 1 V/ms maximum rate of change)

75 Adc

0.65 Vdc

40

MOhms

29.00 Vdc 27.00 Vdc 21.60 Vdc

60 feet
47 feet

30.50 Vdc

40 Vdc

56 dBmC

100 mV

(rms)

250 mV

(p-p)

9+10logIp

dBmC

Ip**0.5 mV

(rms)

250 mV

(p-p)

3 Vdc

26.20 Vdc

DMS-MTX DualMode Metrocell Cell Site Description

5-4 Power and Grounding Requirements

The input voltage for other communication equipment is typically -48 Vdc
nominal. The voltage range at the Power Distribution Centre (or other type of
a branch panel) shall not exceed the range between -43.75 Vdc to -55.80 Vdc.

The input power is usually obtained from a centralized plant, which may be
shared with other systems or dedicated to the equipment.

Power plant batteries provide backup power for the equipment in case of
power outage. The backup time is typically 8 hours at the site with no engine­alternator or 3 hours at the site with an emergency engine-alternator.

The grounding system of radio and transmission equipment typically conform
to the Common Bonding Network (CBN) bonding topology.

Switching equipment conforms to the Isolated Bonding Network (IBN)
grounding topology (typically, Star-IBN or Sparse-Mesh-IBN). Some
systems also use a Star-IBN bonding topology where the Logic Return (LR)
is isolated from the Framework Ground (FG) except at one clearly defined
point.

411-2021-111 Standard 01.01 June 1996

Power and Grounding Requirements 5-5

Frame power distribution

Figure 5-1 shows the distribution network for supplying power to the cell site
components in the CE and RF Frames.

Figure 5-1
Power distribution for the CE and RF Frames in a Metrocell

Breaker1

Breaker2

Breaker3

Breaker4

Breaker5

Breaker8

A-Pwr

A-Gnd

RIP/Breaker

DRUM Shelf

ACU Shelf

HSMO Shelf

CSM2 Shelf

RMC Shelf
(one to six)

ICRM Shelf

B-Pwr

B-Gnd

Breaker9
Breaker10

Breaker11
Breaker12

Breaker13

Breaker16

Breaker9

Breaker8

Breaker7

Breaker6

Breaker5

Breaker4

Breaker3

A-Pwr

A-Gnd

RIP/Breaker

Duplexer Shelf

ATC Shelf 3

TRU 21,22
DPA 11

TRU/PA Shelf 3

TRU 17,18
DPA 9

ATC Shelf 2

TRU 13,14
DPA 7

TRU/PA Shelf 2

TRU 9,10
DPA 5

ATC Shelf 1

B-Pwr

B-Gnd

TRU 23,24

DPA 12

TRU 19,20

DPA 10

TRU 15,16

DPA 8

TRU 11,12

DPA 6

Breaker12

Breaker13

Breaker14

Breaker15

Breaker16

Breaker17

Breaker18

Blank

Breaker2

TRU 5,6
DPA 3

TRU 7,8

DPA 4

Breaker19

TRU/PA Shelf 1

Breaker1

TRU 1,2
DPA 1

TRU 3,4

Breaker20

DPA 2

DMS-MTX DualMode Metrocell Cell Site Description

5-6 Power and Grounding Requirements

System power protection

There are three levels of protection at a Metrocell cell site. The first level is at
the power plant which may consist of a hydraulic-magnetic breaker or slow­blow fuse. This stage is not provided by Nortel. The second level of
protection is located in the RIP of the frames that consists of a magnetic
breaker. In some cases, a third level of protection is implemented in the
equipment shelf such as the TRU/DPA shelf fans and the ATC shelf and
usually consists of a faster blow fuse. This arrangement isolates faults that
occur lower down in the hierarchy from affecting circuits higher up.

Grounding

UL/CSA approval

The North American electrical codes require that there be no current over the
grounding conductors (see C22.1 par 10-200 and ANSI/NFPA No. 70 article
250-21) and the safety standards specify that the electrical codes be adhered
to. The Metrocell uses a two-wire DC power distribution scheme. In a
grounded two-wire system, the return and ground are multiply connected and
an unspecified amount of the return current can flow over the grounding
conductors in violation of the electrical code rules.

Therefore, each cell site has to be inspected by a safety authority (UL/CSA in
North America) such that the codes requirements (refer to UL-1459 par 14.2
and 34.6 and CSA C22.2 No. 225 par 4.5.3.1a) are met in order to obtain an
approval from that authority.

UL-1459 par 14.2

A product intended for permanent connection to the branch-circuit supply
shall have provision for the connection of one of the wiring methods in
accordance with the National Electrical Code, ANSI/NFPA No. 70.

UL-1459 par 34.6

A field-wiring terminal intended solely for connection of an equipment­grounding conductor shall be capable of securing a conductor of the size rated
for the application in accordance with the National Electrical Code ANSI/
NFPA No. 70.

CSA C22.2 N0. 225 par 3.5.3.1a

Permanently connected equipment shall be provided with wiring terminals or
leads for the connection of conductors not less than 14 AWG and having an
ampacity not less than 125% of the rated input current.

UL would not accept the grounding of the battery return when the battery/cell
site configuration is not in the same room unless the battery is floating. A
dedicated battery/cell site configuration residing in the same equipment room
would not raise any concerns. CSA would have no objections to a grounding

411-2021-111 Standard 01.01 June 1996

Power and Grounding Requirements 5-7

scheme if the system input power is less than 50V thus not requiring any
ground (see CEC par 10-102).

CEC par 10-102

Two wire direct-current systems supplying interior wiring and operating at
not more than 300 V or less than 50 V between conductors shall be grounded,
unless such system is used for supplying industrial equipment in limited areas
and the circuit is equipped with a ground detector.

The interpretation of "objectionable current" is to be aligned with the leakage
current limits as defined in CSA 950 (maximum 5% current rating) or CSA
225 (maximum 10% current rating). The NEC definition of "objectionable
current" is any current not suitable for a particular installation; which would
include leakage current limits, grounding conductor size, electrochemical
potential between dissimilar metals, etc.

Grounding requirements for the Metrocell is to keep the total return current on
the grounding network below 5% of the total system DC current draw. This is
done by:

1. Making the desired return path a much lower resistance than the
undesired return path (that is, current divider principle). Eliminating the
grounding conductor at the power plant will help discourage return
current flow through the supplementary grounding conductor.

2. Minimize equalization currents between frames via the grounding
conductors and antenna coax, etc. This is achieved by adhering to an
isolated mesh grounding concept. The mesh concept means that all the
metal surfaces (frames, shelves, PCP ground planes and module chassis)
within the system are bonded together with ideally as little contact
resistance as practically possible.

Isolation means that the system grounding mesh only makes contact with
other grounded systems at the local ground reference or BPG. This helps
to reduce the chance of ground currents from other systems from flowing
through the Metrocell grounding conductors. Isolation from building steel
should be facilitated by providing an isolation pad underneath each frame.

DMS-MTX DualMode Metrocell Cell Site Description

5-8 Power and Grounding Requirements

DC coupled signals

DC coupled signals are considered undesirable from a grounding point of view
for the following reasons:

• If a signal is routed to another system on a separate ground, then isolation
is lost due to a connection via the signal return.

• Any noise on the system ground can resistively couple onto the signal
potentially causing degradation in system performance (for example, bit
errors on digital signals or unwanted noise pick-up on analog signals).

The Metrocell contains the following DC coupled signal links:

• TRU terminal interface (RS-232 data only) — This potentially creates a
connection between the system ground and the AC ground in which the
connected terminal can affect system performance and damage
equipment. A RS-232 opto (for example, Telebyte model 268) is
recommended for this connection and this link should only be used in
commissioning or doing maintenance and not be connected in normal
operations.

• Control signals between the TRU and DPA (TTL/COMS logic levels) —
These signals are restricted to the shelf backplane only.

• Alarm signals between the ATC shelf and the TRU/DPA shelf (+27 V) —
These signals are restricted between the two shelves on the Metro RF
Frame which provides a good low resistance ground to frame.

• Interframe alarm signals (+27V) — These signals are actually opto­isolated at the receive end (that is, at the ACU). The return path is through
the system framework ground.

• ATC remote interface (RS-232 or RS-485) — (Future Development.)

411-2021-111 Standard 01.01 June 1996

Power and Grounding Requirements 5-9

Cable Identification

It is a current practice to label or color-code insulated conductors. The
following table shows the labeling and colors of insulated wires used in North
America.

Table 5-2
Cable identification - North America

Conductor Potential Function Label Color Code (if used)

+24 Vdc dc power L+ (typically black with a

tag)

0 V (grounded side of
the +24 Vdc power
supply)

-48 Vdc /-60 Vdc dc power L- (typically black with a

0 V (grounded side of
the -48/-60 Vdc power
supply)

grounded (or bonded
to ground)

grounded (or bonded
to ground)

dc power return,
battery return,
BR conductor

dc power return,
battery return, BR
conductor

framework ground,
framework bonding
conductor

ac equipment
grounding conductor

L- (typically black with a

tag)

tag)

L+ (typically black with a

tag)

FG green (50%) yellow

(50%)

none green (N. America)

green + yellow
(Europe)

Framework Ground or Framework Bonding conductors are also known as
"Protective Earth" as per IEC-950. The 50/50 green yellow ratio must be no
less than 30% and no more than 70% for either color.

Note: Countries outside North America may have different labeling and

color coding of cables. Follow the safety standards for installation and
maintenance of electrical equipment in your country accordingly.

DMS-MTX DualMode Metrocell Cell Site Description

5-10 Power and Grounding Requirements

411-2021-111 Standard 01.01 June 1996

6-1

6

Datafilling a Metro Cell Site

Datafill Overview

This section outlines the differences which you should consider when
datafilling a Metro site. It makes no attempt at dealing with the entire datafill
procedure and assumes that you are familiar with the MTX Cell Site Datafill
Procedures. Please refer to NTP 411-2131-461 ICP Datafill Guide for
information concerning the entire Cell Site Table Datafill.

A Metro Cell site looks for all intensive purposes like any other ICP/ICRM
cell site to the MTX. It uses all the same tables, loads, and parameters as do
the previous ICP/ICRM methods. The outstanding difference, which is
apparent, is that more Trunks and DSPMs will be required to service the
additional radios that the Metro RF frame is equipped with. The following
datafill tables will be addressed in the view of differences to keep in mind
when datafilling a Metro Cell Site:

Table 6-1
Datafill differences of the Metrocell from an NT800DR cell

Table Metro differences

CLLI More trunks should be assigned as each RF frame can be

equipped with 8 more radios than a standard macrocell frame.
ACUALM PA Fan Alarms are laid out differently with the new RF frame.
CCHINV The RF frame location of the DRU should be correctly identified

in relation to the ICRM P-side card port number.
LCRINV The RF frame location of the DRU should be correctly identified

in relation to the ICRM P-side card port number.
VCHINV The RF frame location of the DRU should be correctly identified

in relation to the ICRM P-side card port number.

DMS-MTX DualMode Metrocell Cell Site Description

6-2 Datafilling a Metro Cell Site

Table CLLI

Table CLLI defines both a name and a quantity to a certain MTX trunk
assignment. For the Metro application the number of trunks assigned in
TRKGRSIZ should be capable of supporting the additional VCHs supported.
The minimum number of trunks required is shown in Table 6-2 for various
Metro configurations with the maximum number of DRUs.

Table 6-2
Trunk requirement for different Metrocell configurations

Metro Site Type Minimum Number of Trunks assigned to Table

CLLI field TRKGRSIZ

Omni site 24
120 Sectored (1 RF Frame) 24
60 Sectored (2 RF Frames) 48

Note: It is a good practice to assign more trunks than is necessary to

prevent from having to backtrack through all the Tables to change the
number in Table CLLI.

Table ACUALM

A Metrocell has input alarm points hardwired to the ACU. The alarm points
for the CE Frame remain the same as per the standard NT800DR Macro Cell
Site although their numbering scheme is changed. However the Metro RF
Frame alarm points differ. The alarm point configuration for each Metro RF
Frame has 23 alarm points to be datafilled in Table ACUALM. The alarm
points monitor the:

• TRU/DPA cooling fans

• A and B side DC power filters

• ATC: cavities, DC power, and cooling fan

The alarm points are also assigned for each DRU in the frequency assignment
tables (CCHINV, LCRINV, VCHINV) of the Metro Cell Site.

The MTX alarm point numbers for the hardwired Metro RF frame alarm
points are listed in Table 6-3 and Table 6-4 for the MTX Table ACUALM.

411-2021-111 Standard 01.01 June 1996

Table 6-3
MTX Datafill Alarm Points for Metro RF Frame

Datafilling a Metro Cell Site 6-3

Metro RF Shelves Fan Alarm

Points

Shelf # FAN 1 FAN 2 FAN 3 FAN 4 ATC # Cavities Fan Pwr

1 0123 1162021
2 4567 2172223
3891011 3182425
4 12131415 4192627
5 32333435 5485253
6 36373839 6495455
7 40414243 7505657
8 44454647 8515859
9 64656667 9808485

10 68 69 70 71 10 81 86 87

11 72 73 74 75 11 82 88 89

Metro RF Frame ATC

Alarm Points

12 76 77 78 79 12 83 90 91
13 96 97 98 99 13 112 116 117
14 100 101 102 103 14 113 118 119
15 104 105 106 107 15 114 120 121
16 108 109 110 111 16 115 122 123
17 160 161 162 163 17 176 180 181
18 164 165 166 167 18 177 182 183

DMS-MTX DualMode Metrocell Cell Site Description

6-4 Datafilling a Metro Cell Site

Table 6-4
MTX Alarm Points Datafill Numbers for Metro RF Frame

Metro RF Frame Power Filter Alarm Points

Metro RF Frame # Power Filter A-Side Power Filter B-Side

128 29
260 61
392 93
430 31
5 124 125
6 188 189

The MTX Datafill alarm points for the CE frame are shown in Table 6-5.

Table 6-5
MTX Alarm Points Datafill Numbers for Metro CE Frame components

Alarm

name

HSMO +27V A 128 HSMO +27V B 129 HSMO #1 130 HSMO #2 131
CSM2 132
RMC +27V A1 134 RMC +27V B1 135 RMC +27V A2 136 RMC +27V B2 137
RMC LNA1 138 RMC LNA2 139 RMC LNA3 140 RMC LNA4 141
RMC LNA5 142 RMC LNA6 143 RMC LNA7 144 RMC LNA8 145
RMC LNA9 146 RMC LNA10 147 RMC LNA11 148 RMC LNA12 149
ICRM 1 152 ICRM 2 153 ICRM 3 154 ICRM 4 155

Alarm

point

Alarm

name

Alarm

point

Alarm

name

Alarm

point

Alarm

name

Alarm

point

411-2021-111 Standard 01.01 June 1996

Table VCHINV, CCHINV, LCRINV

The frequency assignment tables should be datafilled so that the TRU
location in the Metro RF Frame with respect to the port card of the ICRM are
correctly identified in the datafill tuple. Each physical location in the Metro
RF Frame corresponds with a port number of the NT8X47BA Port Card of
the ICRM. The datafill of these frequency assignment tables requires that the
P-side card and port number be defined. Each NT8X47BA Port Card of the
ICRM must be cabled to either J205 or J206 of the Metro RF Frame RIP.
Table 6-6 is a matrix of NT8X47BA port connections to the TRU number of
the Metro RF frame for each RIP connector.

Note: Even though channels can be datafilled on every Port Card and on

almost every Port (Exception: Card 8 Port 14, Card 8 Port 15, Card 9 Port
13, Card 9 Port 14, and Card 9 Port 15), it is recommended that the
Control Channel and its backup (Locate Receiver, Analog or Digital) be
datafilled on separate Port Cards (see Frequency Assignment Example).

Datafilling a Metro Cell Site 6-5

Table 6-6
NT8X47BA Port Numbers for Metro TRU locations

RIP Connector J205 Rip Connector J206

METRO

TRU #

NT8X47BA

Port #

METRO

TRU #

NT8X47BA

Port #

10 20
31 41
52 62
73 83
94 104

11 5 12 5
13 6 14 6
15 7 16 7
17 8 18 8
19 9 20 9
21 10 22 10
23 11 24 11

Location in

Metro Frame

RF Frame 1

RF RIP

Duplexer

1

ATC 3

DPA11DPA

TRU 22

DPA9DPA

TRU 18

12

10

TRU 21

TRU 17

ATC 2

DPA7DPA

TRU 14

DPA5DPA

TRU 10

8

6

TRU 13

TRU 9

ATC 1

DPA3DPA

TRU 6

DPA1DPA

TRU 2

4

2

TRU 5

TRU 1

Base

TRU 24

TRU 23

TRU 20

TRU 19

TRU 16

TRU 15

TRU 12

TRU 11

TRU 8

TRU 7

TRU 4

TRU 3

DMS-MTX DualMode Metrocell Cell Site Description

6-6 Datafilling a Metro Cell Site

Frequency Assignment Example

An example configuration is shown in Figure 6-1. In this example The ICRM
virtual port card 0 is hardwired to the RIP Connector J205 and virtual port
card 1 is hardwired to RIP Connector J206 (see Figure 6-2). Since port card 0
is hardwired to J205 it will be connected to all the TRUs with odd numbered
Metro locations (Refer to the Metro RF Frame Figure for the TRU numbering
scheme). Hence port card 1, which is hardwired to J206, will be connected to
all the TRUs with even numbered Metro locations.

Five datafill tuples are shown in the example figure for:

• a CCH,

• a Digital Locate Receiver (DLR)—serving as the CCH backup in this

example,

• an Analog Locate Receiver (ALR)—can be assigned to any TRU, and

• two VCH TRU personalities.

The table in the figure shows the location of the five TRUs with respect to
their Metro shelf locations.

Figure 6-1
Example of Metro TRU datafill

Table CCHINV
CCHKEY CHANNO BACKUP MODE TERMATTR CARD PORT ALRAMPT
49 0 331 Y 0 AUTOTUNE COMBINED TRU2AN60 0 0 0

Table LCRINV
LCRKEY CCHBACKED ADMODE TERMATTR CARD PORT ALARMPT LCRTEST
49 0 Y 0 TDMA3 TRU2AN60 1 1 1 N
49 1 N ANALOG TRU2AN60 1 2 2 N

Table VCHINV
VCHKEY CHANNO ADMODE GROUP TRKMEMS TERMATTR CARD PORT ALARMPT XCVRSAT
49 1 289 TDMA3 (000) (1)(101)(201) TRU2AN60 0 1 1 DEFAULT
49 4 226 ANALOG_TDMA3 (001) (4)(104)(204) TRU2AN60 1 3 4 DEFAULT

Channel and Frequency ICRM location RF Frame location

TRU Slot 1CCH 0 (331)
TRU Slot 4

LCR 0 (DLR)

Card 0 Port 0

Card 1 Port 1
LCR 1 (ALR)
VCH 1 (289)
VCH 4 (226)

Card 1 Port 2

Card 0 Port 1

Card 1 Port 3

TRU Slot 6
TRU Slot 3
TRU Slot 8

Note: J205 and J206 are cabled to the ICRM port cards as shown in Figure 6-2.

411-2021-111 Standard 01.01 June 1996

Figure 6-2
Example of Metro ICRM/TRU hardwire configuration

Datafilling a Metro Cell Site 6-7

45678

NT8X47BA Port Card

NT8X47BA Port Card

NT8X47BA Port Card

Physical Port Card Slot Location

NT8X47BA Port Card

NT8X47BA Port Card

ICRM

12340 56789Logical Port Card Slot Locations

17 18 19

NT8X47BA Port Card

NT8X47BA Port Card

20 21

NT8X47BA Port Card

NT8X47BA Port Card

NT8X47BA Port Card

Metro
RF RIP

J201 J209J205J202 J203 J204 J206 J207 J208

Connector Assignments

DMS-MTX DualMode Metrocell Cell Site Description

6-8 Datafilling a Metro Cell Site

411-2021-111 Standard 01.01 June 1996

±

7-1

Appendix A: DualMode Metrocell Cell Site Specifications

System Configuration

Channel capacity Up to 120 RF Channels for Omni cell sites

Up to 8, 16 or 24 RF Channels per sector
for 120 ° STSR cell sites

Locate capacity 23,077 locates/hr./locate transceiver
Control channel capacity 22,464 messages/hr.

Radio Frequency

Radio frequency band Receive: 824 to 849 MHz

Frequency stability
Channel spacing 30 kHz
Duty cycle Continuous
PA power: Maximum 43.5 dBm (22.4 Watts) ± 0.5 dB

Up to 8 or 16 RF Channels per sector for
60 ° STSR cell sites

Transmit: 869 to 894 MHz

0.25 ppm

Adjustment range 23.5 to 43.5 dBm (0.22 to 22.4 Watts)

Note: Adjustment range is the range of requested powers which

may be typed into the TRU terminal interface.

DMS-MTX DualMode Metrocell Cell Site Description

7-2 DualMode Metrocell Cell Site Specifications

Transmit path insertion loss (including ATC, duplexer and cable losses):

8 channels -4.4 dB maximum
16 channels -4.7 dB maximum
24 channels -5.0 dB maximum

Minimum antenna input RF power (at the ANT port of the duplexer):

8 channels 38.6 dBm (7.33 watts)
16 channels 38.3 dBm (6.68 watts)

24 channels 38.0 dBm (6.38 watts)
Intermodulation spurious emissions< -60 dBc
Receive path insertion gain (ANT port of duplexer to TRU input port)

Receiver sensitivity for 12 dB SINAD C message weighting:

Receiver de-sensitization < 3 dB
Antenna port impedance 50 ohms unbalanced

Audio Interface

Audio impedance 600 ohms balanced
Audio output levels: Nominal -18 dBm @ ± 2.9 kHz

+3 dB ± 2 dB

Analog mode < -119 dBm

Digital mode < -113 dBm

Adjustable in fractional units, up to two
decimal points, from -28.0 dBm to -10.0
dBm for the transmit path and from -28.0
dBm to -16.0 dBm for the receive path

Alarms

Base station 192 points
Auxiliary alarms 16 assemble points (cabinet, power, tower,

411-2021-111 Standard 01.01 June 1996

etc.)

±

DC Power Requirements

Grounding As specified in Northern Telecom’s

Voltage Nominal +27.0 Vdc ± 0.5 Vdc

Ripple 400 millivolts
Spurious 0.005 - 10 MHz < -55 dBm @ 0.3 to 3.4 kHz
Noise < 32 dBrnC (600 ohms bridged)

DualMode Metrocell Cell Site Specifications 7-3

NTP-297-1001-156

Range +21.0 Vdc to 29.0 Vdc

Voltage stability
Voltage response < 600 ms for a step of 10-70% load
Voltage over/under shoot < 20% of pre-set voltage for a step of

Power Distribution Requirements

Channel/Frames Current Breakers

Mechanical

Rack dimension Height 84" (213.4 cm)

Clearance and Access Ceiling 8 feet (7.5 feet. after cable tray

1% of pre-set voltage @ 0-100% load

10-70% load

Width 22" (56 cm)
Depth 24" (61 cm), including cables and

excluding unit handles

installation
Front aisle 3 feet
Rear aisle 2 feet
Building access door are required to be a

minimum of 30 inches wide

Weight CE frame 400 lb. @ 80 lb./sq. ft.

RF Frame 950 lb. @ 115 lb./sq. ft.

DMS-MTX DualMode Metrocell Cell Site Description

7-4 DualMode Metrocell Cell Site Specifications

Paint Maple Brown # SCP-717-R1
Marking Nortel Logo

Packaging

Frames ShockAir bubble sheet and Styrofoam

Vibration Styrofoam sandwich pallet
Bracing and support Wood, 2 x 4 braces
Moisture 5 mil polyethylene
Transport Air ride shock

packaging material

Modules Separate shipping carton

Environmental

Operating temperature

Thermal cycling Capable of withstanding the changes in

Operating Relative Humidity 20 to 95% (non-condensing) over nominal

Normal operation +5 ° C to +40 ° C (+41 ° F to +105 ° F)

Short-term operation 0 ° C to +50 ° C (+32 ° F to 120 ° F)

Note: Short-term refers to a period of not more than 72

consecutive hours and a total of not more than 15 days in one year.

temperature at the rate of 1 ° C (1.8 ° F) in
three minutes over the short-term operating
temperature range

temperature range and not to exceed 0.024
lb of water/lb of dry air

Altitude 61 meters (200 feet) below sea level to

Shock and vibration Screw lock on required modules

411-2021-111 Standard 01.01 June 1996

4000 meters (13,000 feet) above sea level

DualMode Metrocell Cell Site Specifications 7-5

Earthquake Meet earthquake requirements of Zone 1

and Zone 2 as defined by Bellcore

TR-NWT-000063
Fixed equipment anchorage.
Thermal dissipation for Metrocell RF Frame:

TRU 27 W 24 648 W
PA 89 W 24 2136 W
Combiner (-4.5 dB) 21 W 24 504 W
Duplexer (-0.7 dB) 9.3 W 3 28 W

Regulatory

Electromagnetic Emissions

Cell site equipment complies with the following Regulatory Specification:

• FCC part 22 for 800 MHz frequency

• FCC part 15 Class B for cell site with Universal CE Frame and Metro RF

• DOC RSS-128 Issue 1.0 Dual Mode Capability in Canada

Radiated Emissions

Cell site equipment complies with the following Regulatory Specification:

Component Dissipation per

unit

Maximum

number of units

Total 3.3 KW

Total

dissipation

Frame (except for the ICRM, CSM, HSMO and ACU shelves located on
the Universal CE Frame)

|

• FCC Part 22 for 800 MHz frequency

• FCC Part 15 Class B for cell site with Universal CE Frame and Metro RF

Frame (except for the ICRM, CSM, HSMO and ACU shelves located on
the Universal CE Frame)

• Bell Canada Design Standard TAD 8465 of Bellcore TR-NWT-001089 in

10 kHz to 30 MHz and 1 GHz to 10 GHz range for radiated emission

Telecom Compliance

Cell site equipment complies with the following Regulatory Specification:

• CS03, Issue 7, Part 2 (Table 1: Digital Interface Requirement, Type IV)

• FCC Part 68 (TSB31, Table 4.5-2: Test Requirement Matrix)

DMS-MTX DualMode Metrocell Cell Site Description

7-6 DualMode Metrocell Cell Site Specifications

Product Safety

Cell site equipment complies with the following Safety Specification:

• CSA C22.2 No. 225-M90, Telecommunication Equipment

• CSA C22.2 No. 1, Radio, Television and Electronic Apparatus

• UL-1459, Issue 2.0 Telephone Standard

• UL-1419, Proposed Video and Audio Equipment

• Nortel Standard 9001.00, Product Safety

411-2021-111 Standard 01.01 June 1996

Frequency Plans 7-7

Appendix B: Frequency Plans

N=7 Frequency plan (Band A)

Group A1 B1 C1 D1 E1 F1 G1 A2 B2 C2 D2 E2 F2 G2 A3 B3 C3 D3 E3 F3 G3
Channel 333 332 331 330 329 328 327 326 325 324 323 322 321 320 219 318 317 316 315 314 313
Number 312 311 310 309 308 307 306 305 304 303 302 301 300 299 298 297 296 295 294 293 292

291 290 289 288 287 286 285 284 283 282 281 280 279 278 277 276 275 274 273 272 271
270 269 268 267 266 265 264 263 262 261 260 259 258 257 256 255 254 253 252 251 250
249 248 247 246 245 244 243 242 241 240 239 238 237 236 235 234 233 232 231 230 229
228 227 226 225 224 223 222 221 220 219 218 217 216 215 214 213 212 211 210 209 208
207 206 205 204 203 202 201 200 199 198 197 196 195 194 193 192 191 190 189 188 187
186 185 184 183 182 181 180 179 178 177 176 175 174 173 172 171 170 169 168 167 166
165 164 163 162 161 160 159 158 157 156 155 154 153 152 151 150 149 148 147 146 145
144 143 142 141 140 139 138 137 136 135 134 133 132 131 130 129 128 127 126 125 124
123 122 121 120 119 118 117 116 115 114 113 112 111 110 109 108 107 106 105 104 103
102 101 100 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82

81 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61
60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40
39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19
18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1

1023 1022 1021

1020 1019 1018 1017 1016 1015 1014 1013 1012 1011 1010 1009 1008 1007 1006 1005 1004 1003 1002 1001 1000

999 998 997 996 995 994 993 992 991

716 715 714 713 712 711 710 709 708 707 706 705
704 703 702 701 700 699 698 697 696 695 694 693 692 691 690 689 688 687 686 685 684
683 682 681 680 670 678 677 676 675 674 673 672 671 670 669 668 667

Note: The control channels are indicated in bold in these frequency plans

(they may be re-assigned as required).

DMS-MTX DualMode Metrocell Cell Site Description

7-8 Frequency Plans

N=7 Frequency plan (Band B)

Group A1 B1 C1 D1 E1 F1 G1 A2 B2 C2 D2 E2 F2 G2 A3 B3 C3 D3 E3 F3 G3
Channel 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354
Number 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375

376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396
397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417
418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438
439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459
460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480
481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501
502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522
523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543
544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564
565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585
586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606
607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627
628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648
649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666

717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732
733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753
754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774
775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795
796 797 798 799

411-2021-111 Standard 01.01 June 1996

Frequency Plans 7-9

N=4 Frequency plan (Band A)

Group A1 B1 C1 D1 A2 B2 C2 D2 A3 B3 C3 D3 A4 B4 C4 D4 A5 B5 C5 D5 A6 B6 C6 D6
Channel 333 332 331 330 329 328 327 326 325 324 323 322 321 320 219 318 317 316 315 314 313 312 311 310
Number 309 308 307 306 305 304 303 302 301 300 299 298 297 296 295 294 293 292 291 290 289 288 287 286

285 285 283 282 281 280 279 278 277 276 275 274 273 272 271 270 269 268 267 266 265 264 263 262
261 260 259 258 257 256 255 254 253 252 251 250 249 248 247 246 245 244 243 242 241 240 239 238
237 236 235 234 233 232 231 230 229 228 227 226 225 224 223 222 221 220 219 218 217 216 215 214
213 212 211 210 209 208 207 206 205 204 203 202 201 200 199 198 197 196 195 194 193 192 191 190
189 188 187 186 185 184 183 182 181 180 179 178 177 176 175 174 173 172 171 170 169 168 167 166
165 164 163 162 161 160 159 158 157 156 155 154 153 152 151 150 149 148 147 146 145 144 143 142
141 140 139 138 137 136 135 134 133 132 131 130 129 128 127 126 125 124 123 122 121 120 119 118
117 116 115 114 113 112 111 110 109 108 107 106 105 104 103 102 101 100 99 98 97 96 95 94

93 92 91 90 89 88 87 86 85 84 83 82 81 80 79 78 77 76 75 74 73 72 71 70
69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46
45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22
21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1

1023 1022 1021

1020 1019 1018 1017 1016 1015 1014 1013 1012 1011 1010 1009 1008 1007 1006 1005 1004 1003 1002 1001 1000 999 998 997

996 995 994 993 992 991

716 715 714 713 712 711 710 709 708 707 706 705 704 703
702 701 700 699 698 697 696 695 694 693 692 691 690 689 688 687 686 685 684 683 682 681 680 679
678 677 676 675 674 673 672 671 670 669 668 667

N=4 Frequency plan (Band B)

Group A1 B1 C1 D1 A2 B2 C2 D2 A3 B3 C3 D3 A4 B4 C4 D4 A5 B5 C5 D5 A6 B6 C6 D6
Channel 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357
Number 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381

382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405
406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429
430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453
454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477
478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501
502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525
526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549
550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573
574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597
598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621
622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645
646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666
717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740
741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764
765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788
789 790 791 792 793 794 795 796 797 798 799

DMS-MTX DualMode Metrocell Cell Site Description

7-10 Frequency Plans

411-2021-111 Standard 01.01 June 1996

Family Product Manual Contacts Copyright Confidentiality Legal statements DocInfo

2

DualMode Metrocell

Cell Site Description

Manual

Wireless Customer Documentation, Manager
Nortel
P.O. Box 833858
Richardson, Texas 75083-3858
Phone: [phone] / Fax: [phone]

Copyright  1996 Northern Telecom

NORTHERN TELECOM CONFIDENTIAL:

information contained in this document is the property of
Northern Telecom. Except as specifically authorized in writing by
Northern Telecom, the holder of this document shall keep the
information contained herein confidential and shall protect same
in whole or in part from disclosure and dissemination to third
parties and use same for evaluation, operation, and
maintenance purposes only.

Information is subject to change without notice.
DMS, DMS SuperNode, DMS-MSC, DMS-HLR, DMS-100, and
MAP are trademarks of Northern Telecom.
Publication number: 411-2021-111
Product release: DualMode Metrocell Cell Site Description
Manual
Document release: Standard 01.01
Date: June 1996
Printed in the United States of America

The