ADC DVICS800 1 User Manual

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Digivance 800 Mhz Indoor Coverage Solution Installation and Operation Manual

DRAFT

ADCP-75-110

Issue B

March 2001

1126955 Rev A

ADCP-75-110 • Issue B • March 2001

2001,

REVISION HISTORY

ISSUE DATE REASON FOR CHANGE

Issue B 03/01 Original

TRADEMARK INFORMATION

ADC and FiberGuide are registered trademarks of ADC Telecommunications, Inc. Digivance is a trademark of ADC Telecommunications, Inc. LC is a trademark of Lucent Technologies Inc. TORX is a registered trademark of Textron, Inc.

DISCLAIMER OF LIABILITY

Contents herein are current as of the date of publication. ADC reserves the right to change the contents without prior notice. In no event shall ADC be liable for any damages resulting from loss of data, loss of use, or loss of profits and ADC further disclaims any and all liability for indirect, incidental, special, consequential or other similar damages. This disclaimer of liability applies to all products, publications and services during and after the warranty period.

This publication may be verified at any time by contacting ADC’s Technical Assistance Center at 1-800-366-3891, extension 63475 (in U.S.A. or Canada) or 952-946-3475 (outside U.S.A. and Canada), or by e-mail to bcg_tac@adc.com.

Page ii

ADC Telecommunications, Inc. P.O. Box 1101, Minneapolis, Minnesota 55440-1101 In U.S.A. and Canada: 1-800-366-3891 Outside U.S.A. and Canada: (952) 938-8080 Fax: (952) 946-3292

TABLE OF CONTENTS

Content Page

1 SYSTEM FUNCTIONAL OVERVIEW AND UNIT DESCRIPTIONS ........................................ 1

1.1 System Functional Overview ....................................................... 1

1.2 Digital Host Unit Description ....................................................... 3

1.3 Digital Remote Unit Description ..................................................... 7

1.4 Digital Expansion Unit Description ................................................... 9

1.5 Terms and Definitions............................................................12

1.6 Specifications .................................................................13

2 INSTALLATION PLANNING AND SYSTEM DESIGN................................................16

2.1 Base Station Interface Requirements..................................................16

2.2 Locating and Mounting Requirements .................................................18

2.3 Powering Requirements ..........................................................19

2.4 Optical Options and Requirements ...................................................20

2.5 Coaxial Cable Requirements ....................................................... 20

2.6 System Expansion Planning ........................................................20

2.7 DRU Antenna Options ............................................................21

2.8 Local Alarm System Reporting Requirements ............................................21

2.9 Maintenance Requirements ........................................................22

2.10 System Design Recommendations ...................................................22

3 DIGITAL HOST UNIT INSTALLATION PROCEDURE................................................25

3.1 System Plan Review and Pre-Installation Cable Routing .....................................25

3.2 Tools and Materials .............................................................25

3.3 Unpacking and Inspection .........................................................25

3.4 Mounting Procecure ............................................................25

3.5 Chassis Ground Procedure.........................................................29

3.6 Coaxial Cable Connections ........................................................29

3.7 Ports 1-6 Optical Connections ......................................................30

3.8 DC Power Connections ...........................................................32

3.9 Local Alarm System Connections ....................................................33

3.10 AC Power Connections ...........................................................35

3.11 Create As-Built Drawing ..........................................................36

4 SYSTEM OPERATION ..................................................................37

4.1 Tools and Materials .............................................................37

4.2 Turn-Up System and Verify Operation .................................................37

4.3 Correct Installation Problems.......................................................39

4.4 Test System Performance .........................................................42

5 SYSTEM MAINTENANCE PROCEDURES ......................................................43

5.1 Tools and Materials .............................................................43

5.2 Fault Detection and Alarm Reporting ..................................................43

5.3 Fault Isolation and Troubleshooting ..................................................44

5.4 Test Procedures................................................................46

5.5 DHU or DEU Fan Replacement ......................................................49

ADCP-75-110 • Issue B • March 2001

Continued

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2001, ADC Telecommunications, Inc.

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ADCP-75-110 • Issue B • March 2001

TABLE OF CONTENTS

Content Page

6 GENERAL INFORMATION ............................................................... 51

6.1 Warranty/Software ............................................................. 51

6.2 Software Service Agreement....................................................... 51

6.3 Repair/Exchange Policy .......................................................... 51

6.4 Repair Charges................................................................ 51

6.5 Replacement/Spare Products ...................................................... 52

6.6 Returned Material.............................................................. 52

6.7 Customer Information and Assistance................................................. 52

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2001, ADC Telecommunications, Inc.

ABOUT THIS GUIDE

This installation and operation manual provides the following information:

• An overview of the Digivance Indoor Coverage Solution (ICS) and a description of the

basic system components including the Digital Host Unit (DHU), Digital Expansion Unit (DEU), and the Digital Remote Unit (DRU).

• System requirements for planning the Digivance ICS installation.

• Procedures for installing the DHU.

• Procedures for operating and maintaining the Digivance ICS.

• Product warranty, repair, return, and replacement information

The procedures for installing the DEU and DRU are provided in other publications which are referenced in the Related Publications section and at appropriate points within this manual.

RELATED PUBLICATIONS

ADCP-75-110 • Issue B • March 2001

Listed below are related manuals and their publication numbers. Copies of these publications can be ordered by contacting the ADC Technical Assistance Center at 1-800-366-3891 (in U.S.A. or Canada) or 952-946-3000, extension 3223 (outside U.S.A. and Canada).

Title/Description ADCP Number

Digivance ICS Digital Expansion Unit Installation Instructions ADCP-75-111

Provides a description of the DEU and procedures for installing the DEU.

Digivance ICS Digital Remote Unit Installation Instructions ADCP-75-112

Provides a description of the DRU and procedures for installing the DRU.

Digivance ICS Local Interface Unit User Manual ADCP-75-113

Provides a description of the LIU and procedures for installing the LIU.

Digivance ICS Remote Interface Unit User Manual ADCP-75-114

Provides a description of the RIU and procedures for installing the RIU.

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2001, ADC Telecommunications, Inc.

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ADCP-75-110 • Issue B • March 2001

ADMONISHMENTS

Important safety admonishments are used throughout this manual to warn of possible hazards to persons or equipment. An admonishment identifies a possible hazard and then explains what may happen if the hazard is not avoided. The admonishments — in the form of Dangers, Warnings, and Cautions — must be followed at all times. These warnings are flagged by use of the triangular alert icon (seen below), and are listed in descending order of severity of injury or damage and likelihood of occurrence.

Danger: Danger is used to indicate the presence of a hazard that will cause severe personal

injury, death, or substantial property damage if the hazard is not avoided.

Warning: Warning is used to indicate the presence of a hazard that can cause severe

personal injury, death, or substantial property damage if the hazard is not avoided.

Caution: Caution is used to indicate the presence of a hazard that will or can cause minor

personal injury or property damage if the hazard is not avoided.

GENERAL SAFETY PRECAUTIONS

The following general admonishments apply throughout the procedures in this manual.

Warning: Wet conditions increase the potential for receiving an electrical shock when

installing or using electrically-powered equipment. To prevent electrical shock, never install or use electrical equipment in a wet location or during a lightning storm.

Warning: The DRU is powered by 48 VDC power which is supplied over customer-provided

wiring. To prevent electrical shock when installing or modifying the DRU power wiring, disconnect the wiring at the power source before working with uninsulated wires or terminals.

Danger: This equipment uses a Class 1 Laser according to FDA/DCRH rules. Laser radiation

can seriously damage the retina of the eye. Do not look into the ends of any optical fiber. Do not look directly into the optical adapters of any digital unit or exposure to laser radiation may result. An optical power meter should be used to verify active fibers. A protective cap or hood MUST be immediately placed over any radiating adapter or optical fiber connector to avoid the potential of dangerous amounts of radiation exposure. This practice also prevents dirt particles from entering the adapter or connector

Danger: Do not look into the ends of any optical fiber. Exposure to laser radiation may result. Do

not assume laser power is turned-off or the fiber is disconnected at the other end.

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2001, ADC Telecommunications, Inc.

Danger: Always allow sufficient fiber length to permit routing without severe bends. Fibers

may be permanently damaged if bent/curved to a radius of less than 1.5 inches (38 mm).

STANDARDS CERTIFICATION

FCC: This equipment complies with the applicable sections of Title 47 CFR Parts 15, 22, 24, and

90. UL/CUL: This equipment complies with UL and CUL 1950 Standard for Safety for

Information Technology Equipment, Including Electrical Business Equipment. FDA/CDRH: This equipment uses a Class 1 LASER according to FDA/CDRH Rules. This

product conforms to all applicable standards of 21 CFR Part 1040.

LIST OF ACRONYMS AND ABBREVIATIONS

The acronyms and abbreviations used in this manual are detailed in the following list:

ADCP-75-110 • Issue B • March 2001

A Amperes

AC Alternating Current

AGC Automatic Gain Control

AMPS Advanced Mobile Phone Service

CDMA Code Division Multiple Access

CDRH Center for Devices and Radiological Health

CUL Canadian Underwriters Laboratories

DAS Distributed Antenna System

DC Direct Current

DEU Digital Expansion Unit

DHU Digital Host Unit

DRU Digital Remote Unit

EIA Electronic Industries Association

ERP Effective Radiated Power

ESD Electrostatic Discharge FCC Federal Communications Commission FDA Food and Drug Administration

ICS Indoor Coverage Solution

LIU Local Interface Unit

NOC Network Operations Center

PWR Power

RIU Remote Interface Unit

RF Radio Frequency

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ADCP-75-110 • Issue B • March 2001

RSSI Received Signal Strength Indication

TDMA Time Division Multiple Access

UPS Uninterruptible Power Supply

VAC Volts Alternating Current VDC Volts Direct Current

WECO Western Electric Company

RX Receive or Receiver

TX Transmit or Transmitter UL Underwriters Laboratories

V Volts

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2001, ADC Telecommunications, Inc.

1 SYSTEM FUNCTIONAL OVERVIEW AND UNIT DESCRIPTION

This section provides an overview of the Digivance Indoor Coverage Solution (ICS), a description of the functions and features provided by the units that comprise the system, a listing of terms used and their definition, and a table of specifications.

1.1 System Functional Overview

The Digivance ICS is a digitally distributed antenna system that provides in-building coverage for analog (AMPS) or digital (TDMA or CDMA) cellular phone systems operating within the 800 MHz frequency band. Large buildings typically interfere with the transmission or reception of cellular phone system signals by imposing high attenuation losses on RF signals. The Digivance ICS is designed to overcome the attenuation losses that make cellular communications within buildings or structures difficult or impossible. With the Digivance ICS, cellular phone RF signals can be distributed to the interior areas of any building or structure to eliminate dead spots and improve reception.

ADCP-75-110 • Issue B • March 2001

1.1.1 Basic System Components

The basic components of the Digivance ICS and their functions are shown in Figure 1. The basic system consists of the Digital Host Unit (DHU), Digital Remote Unit (DRU), and when additional capacity or longer fiber runs are required, the Digital Expansion Unit (DEU). In addition, two accessory items, the Local Interface Unit (LIU) and the Remote Interface Unit (RIU) may be used as needed to interface the DHU with the cellular system Base Transceiver Station (BTS).

1.1.2 Interface With BTS

The DHU interfaces, either locally or remotely, with the BTS. As referenced in this publication, the BTS could be either a microcell or a cell site base station. When the BTS (microcell) is co-located with the DHU, a local interface over coaxial cable is possible. An interface device, such as the LIU, may be required to provide the proper input and output RF signal levels between the BTS and the DHU. When the BTS (cell site base station) is not colocated with the DHU, a remote interface using a donor antenna is required. An interface device such as the RIU is required to provide the proper input and output RF signal levels between the donor antenna and the DHU.

The DHU interfaces, as described in the preceding paragraph, with the BTS. In the forward path, the DHU receives RF signals from the BTS. The DHU digitizes the RF signals and then converts them to digital optical signals for transport to the DEUs and DRUs. In the reverse path, the DHU receives digital optical signals from the DRUs and DEUs. The DHU converts the optical signals back to the original RF signal format for transmission to the BTS.

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ADCP-75-110 • Issue B • March 2001

RIU

LIU

DRU

REMOTE

BTS

DRU

LOCAL

BTS

DHU

DRU

DEU

DRU

1.1.3 Interface With Cellular Phones

The DRUs interface with the cellular phones. In the reverse path, the DRU receives RF signals from each cellular phone. The DRU digitizes the RF signals and then converts them to digital optical signals for transport to the DHU. In the forward path, the DRU receives digital optical signals from the DHU. The DRU converts the optical signals back to the original RF signal format for transmission to the cellular phones. A small antenna is connected to the DRU to transmit and receive RF signals from the cellular phones.

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DRU

Figure 1. System Overview Functional Block Diagram

Fig 1C-A

ADCP-75-110 • Issue B • March 2001

1.1.4 Digital Fiber Optic Transport

The DHU is connected to each DRU unit over a pair of multi-mode fiber optic links. One link is used to transport the forward path optical signal. The other link is used to transport the reverse path optical signal. Because the optical signal is digital, no adjustments to the optical signal level are required at the DRU or the DHU regardless of the length of the optical link. Either 50 or 62.5 micron core multi-mode fiber optic cable may be used for the optical link. If 50 micron cable is used, the optical link may be up to 750 meters in length. If 62.5 micron core cable is used, the optical link may be up to 500 meters in length. The fiber optic links are terminated with LC connectors.

1.1.5 Capacity for Expansion and Extended Runs

The DEU enables 6-way expansion of any optical port. This makes is possible to add more DRUs without having to install additional DHUs. Each DHU is equipped with six optical ports. If more than six DRUs are required by the application, a DEU may be connected to one of the optical ports at the DHU which expands that port to six ports. If still more optical ports are required, then a second DEU may be connected to the DHU or a second DEU may be connected to the first DEU. The ability to cascade DEU’s in parallel or in series provides unlimited flexibility. It is physically possible to connect an unlimited number DRUs to the DHU through the installation of DEUs. The maximum number of DRUs that can connected to the DHU is limited only by the cumulative noise effect caused by antenna combining.

1.1.6 Power Requirements

The DHU, DEU, LIU, and RIU are each powered by 120–240 VAC (50–60 Hz) power which is supplied through a standard three-conductor AC power cord. The DRU is powered by nominal 48 VDC which is supplied by the DHU, DEU, or an AC/DC wall-mount style converter. When the DRU is powered by the DHU or DEU, the power is fed through a category 5 cable terminated with male RJ-45 connectors.

1.1.7 Fault Detection and Alarm Reporting

LED indicators are provided on the front panel of the various units to indicate when a fault is detected. In addition, normally open and normally closed alarm contacts (for both major and minor alarms) are provided at the DHU for connection to a customer provided external alarm system. This could be a local system or automatic call-out system.

1.2 Digital Host Unit Description

The DHU, shown in Figure 2, serves as the BTS servicing unit for the Digivance ICS. The DHU provides the following basic functions:

• RF inputs and outputs

• Optical interface to the DRUs or DEUs

• Digitizing of the cellular forward path RF signal

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ADCP-75-110 • Issue B • March 2001

• Distribution of the digitized forward path RF signals into six digitized optical signals

• Conversion of up to six reverse path digitized optical signals to six digitized RF signals

• Combining of the six digitized RF signals into a single composite digitized RF signal

• Conversion of the combined digitized RF signal to a composite cellular RF signal

• DC power for powering the DRUs

• Relay contact closures to provide alarm information to an external alarm system

3.5 INCHES (89 mm)

15.3 INCHES (389 mm)

11.4 INCHES (290 mm)

17.2 INCHES (437 mm)

FRONT PANEL

MOUNTING

BRACKET

(BOTH SIDES)

CABLE MANAGEMENT

TRAY

Fig 2A-A

Figure 2. Digital Host Unit

1.2.1 Primary Components

The DHU consists of two electronic circuit board assemblies and a power supply assembly that are mounted within a powder-coated sheet metal enclosure. The metal enclosure provides a mounting point for the electronic assemblies, serves as a heat sink, and controls RF emissions. Except for the fan units, the electronic circuit board assemblies are not user replaceable. The DHU is designed for use within a non-condensing indoor environment such as inside a wiring closet or cabinet. All controls, connectors, and indicators are mounted on the DHU front panel for convenient access. Cable management functions for the power and fiber optic cables are provided by a cable management tray that extends outward from the DHU front panel.

1.2.2 Mounting

The DHU may be used in both rack-mount and wall-mount applications. For rack mount applications, a pair of reversible mounting brackets is provided that allow the DHU to be mounted in either a 19-inch or 23-inch EIA or WECO equipment rack. When rack-mounted, the front panel of the DHU is flush with the front of the rack. The cable management tray extends 3.9 inches (99 mm) beyond the front panel. For wall-mount applications, a pair of holes is provided in the cable management tray which allow the DHU to be mounted on any flat vertical surface. The DHU should be oriented with the front panel facing upward when wall-mounted. Fasteners are provided for rack-mount applications.

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ADCP-75-110 • Issue B • March 2001

1.2.3 Fault Detection and Alarm Reporting

The DHU is designed to detect internal circuitry faults and optical port faults. Various front panel Light Emitting Diode (LED) indicators turn from green to red or yellow if a fault is detected. A set of alarm contacts (normally open and normally closed) are also provided for reporting an alarm to an external alarm system when a fault is detected. Both major alarm (all fault conditions except high temperature) and minor alarm (high temperature fault condition) contacts are provided.

1.2.4 RF Signal Connections

The RF signal connections between the DHU and the BTS are supported through two type N female connectors. One connector is used for coaxial cable connection of the forward path RF signal. The other connector is used for coaxial cable connection of the reverse path RF signal. In most installations, the DHU will not connect directly to the BTS but will be connected to an interface device such as the RIU or the LIU. Additional information concerning the DHU to BTS interface is provided in the Digivance ICS Remote Interface Unit User Manual (ADCP-75-113) and in the Digivance ICS Local Interface Unit User Manual (ADCP-75-114).

The DHU requires a composite forward path RF signal level of –20 dBm or lower. An overdrive limiter protects the system against excessive inputs but does not function during normal operation. The DHU does not have Automatic Gain Control (AGC).

1.2.5 Optical and Electrical Interface Connections

Operation of the DRUs and DEUs is supported by six optical and six electrical ports. Each optical and electrical interface connection includes a status LED, a duplex LC type optical adapter, an RJ45 DC power jack, and a port enable/disab le switch. An optical port may be connected to a DRU, a DEU, or not used. An electrical port may be connected to a DRU or not used. Unused ports require no connections at all and are disabled via the corresponding port enable/disab le switch. When disabled, the port LED is off, the alarm reporting function is disabled, the laser is off, and the DC power is off. Enabling the enable/disab le switch activates all functions.

1.2.6 Powering

The DHU is powered by 120–240 VAC (50–60 Hz) power which is supplied through a standard three-conductor AC power cord. The power cord is provided with the DHU and is 98 inches (2.5 meters ) long. A resetable circuit breaker/On-Off switch is provided at the unit front panel. The switch applies power to the DHU internal power supply.

1.2.7 Cooling

Continuous air flow for cooling is provided by dual fans mounted on the right side of the housing. A minimum of 3 inches (76 mm) of clearance space must be provided on both the left and right sides of the DHU for air intake and exhaust. An alarm is provided that indicates if a high temperature condition (>70º C/ 158º F) occurs. The fans may be field-replaced if either fan fails.

1.2.8 User Interface

The DHU user interface consists of the various connectors, switches, terminals, and LEDs that are provided on the DHU front panel. The DHU user interface points are indicated in Figure 3 and described in Table 1.

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ADCP-75-110 • Issue B • March 2001

(2) AC POWER

ON/OFF SWITCH

(1) AC POWER CORD

NOTE: SHOWN WITHOUT CABLE MANAGEMENT TRAY

CONNECTOR

(3) OPTICAL PORT

LED INDICATOR

(6 PLACES)

(5) ELECTRICAL PORT

DC POWER JACK

(6 PLACES)

(4) OPT/ELEC PORT

ENABLE/DISABLE

SWITCH (6 PLACES)

(6) OPTICAL PORT

OPTICAL ADAPTERS

TX-LEFT - RX-RIGHT

(6 PLACES)

(7) UNIT LED

INDICATOR

(9) ALARM TERMINAL

STRIP

(10) RF INPUT

CONNECTOR

(8) OVERDRIVE

LED

INDICATOR

(11) RF OUTPUT

CONNECTOR

Figure 3. Digital Host Unit User Interface

Table 1. Digital Host Unit User Interface

REF No.

1 POWER 3-wire AC power

USER INTERFACE

DESIGNATION

DEVICE FUNCTIONAL DESCRIPTION

Used for connecting the AC power cord.

cord connector

2 – I/O rocker switch/

circuit breaker

3 OK/NOK (Ports 1–6) Multi-colored LED

(Red/Green/Yellow)

Provides AC power On/Off control and AC power over current protection.

Indicates if the DRU or remote DEU connected to the optical port is normal or faulty or if the optical inputs from the DRU or remote DEU are normal or lost. (see Note)

4 ON/OFF (Ports 1–6) I/O rocker switch Enables or disables corresponding

electrical and optical ports.

5DC PWR (Ports 1–6) RJ-45 jack (female) Used for connecting a DRU cat 5 power

cable to the designated DC power jack

6 FIBER (Ports 1–6) Duplex LC-type

fiber optic adapter

Used for connecting each DEU or DRU forward path and reverse path optical link to the designated optical adapter.

7 UNIT Multi-colored LED

(Red/Green/Yellow)

8 OVERDRIVE Multi-colored LED

(Red/Green/Yellow)

Indicates if the DHU is normal or faulty. (see Note)

Indicates when the forward path RF input power is overdriving the DHU digitizing circuitry (see Note)

9 MAJOR MINOR Screw-type terminal

connector (14–26 AWG)

Used for connecting an external alarm system to the DHU. Includes normally open (NO), normally closed (NC), and common (COM) wiring connections.

10 RF IN N-type female RF

coaxial connector

11 RF OUT N-type female RF

coaxial connector

Used for connecting the forward path RF coaxial cable to the DHU

Used for connecting the reverse path RF coaxial cable to the DHU

Fig 3B-A

Note: A detailed description of LED operation is provided in Section 5.

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1.3 Digital Remote Unit Description

The DRU, shown in Figure 4, serves as the cellular user servicing unit for the Digivance ICS. The DRU provides the following basic functions:

• RF interface to the cellular users via an external antenna

• Optical interface to the DHU or DEU

• Conversion of the forward path digitized optical signal to a digitized RF signal

• Conversion of the digitized forward path RF signal to the original cellular RF signal

• Digitizing of the cellular reverse path RF signal

• Conversion of the digitized reverse path RF signal to a digital optical signal output

• Transports alarm status via optical link

ADCP-75-110 • Issue B • March 2001

FRONT PANEL

2.1 INCHES (53 mm)

7.3 INCHES (185 mm)

7.0 INCHES (178 mm)

MOUNTING FOOT

(EACH CORNER)

Fig 1-A

Figure 4. Digital Remote Unit

1.3.1 Primary components

The DRU consists of an electronic circuit board assembly that is mounted within a painted sheet metal enclosure. The metal enclosure provides a mounting point for the electronic assembly, serves as a heat sink, and controls RF emissions. The electronic circuit board assembly is not user replaceable. The DRU is designed for use within a non-condensing indoor environment such as inside a building. All controls, connectors, and indicators (except the antenna connector) are mounted on the DRU front panel for convenient access.

1.3.2 Mounting

The DRU is equipped with four integral mounting feet that allow it to be mounted on any flat horizontal or vertical surface. A typical location for mounting the DRU would be above ceiling tiles where the optical fiber and power cables can be concealed or on a wall. Slots are provided in the mounting feet for securing the DRU to the mounting surface.

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ADCP-75-110 • Issue B • March 2001

1.3.3 Fault Detection

The DRU is designed to detect internal circuitry faults or loss of system inputs. A front panel LED indicator turns from green to red when a fault condition is detected or when the system optical input is lost. The DRU sends the fault information to the DHU over the fiber optic link. A corresponding port LED at the DHU turns red when the DRU reports a fault.

1.3.4 RF Signal Interface

The RF signal interface between the DRU and the cellular users is provided through an external antenna connected to a female SMA connector. The antenna which must be ordered separately. Several types of antennas with various patterns are available. Non-ADC antennas may also be used with the DRU to meet various application requirements.

1.3.5 Optical Port

The DRU is equipped with a duplex LC type optical adapter that provides a point for connecting the optical link cables. Depending on the application requirements, the optical adapter may be connected to either a DHU or a DEU.

1.3.6 Powering

The DRU is equipped with a female RJ-45 jack that provides a point for connecting a DC power cable. The DRU is powered by nominal 48 VDC power which is supplied through the RJ-45 connector. Power to the DRU may be supplied by the DHU, DEU, or by a 120 VAC to 48 VDC power converter (available separately as an accessory item) plugged into a properly grounded 120 VAC outlet. The AC/DC converter is a UL Listed stand alone Limited Power Supply (LPS) unit with a rated output of 48 VDC at 1.2 A. When powered by the DHU or DEU, a category 5 twisted-pair cable terminated with RJ-45 connectors is required.

1.3.7 Cooling

The DRU is cooled by natural convection air flow. The DRU mounting feet are designed to provide clearance under the unit so that air can enter the DRU enclosure from the bottom and exit through the top. A minimum clearance of 3 inches (76 mm) must be provided on all sides of the DRU (except the bottom) to ensure there is adequate air circulation for cooling. In addition, at least one surface of the DRU installation area must be open to the interior of the building.

1.3.8 User Interface

The DRU user interface consists of the connectors and the LED that are provided on the DRU front and rear panels. The DRU user interface points are indicated in Figure 5 and described in Table 2.

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ADCP-75-110 • Issue B • March 2001

(2) 48 VDC POWER

CONNECTOR

(1) STATUS LED

(3) FIBER LINK

OPTICAL ADAPTERS

TX-LEFT - RX-RIGHT

REAR VIEWFRONT VIEW

(4) ANTENNA CONNECTOR

Figure 5. Digital Remote Unit User Interface

Table 2. Digital Remote Unit User Interface

REF No.

1 STATUS Multi-colored LED

USER INTERFACE

DESIGNATION

DEVICE FUNCTIONAL DESCRIPTION

Indicates if the status of the DRU is

(Red/Green/Yellow)

normal or faulty or if the forward path

optical input is normal or lost. (see Note) 248 VDC RJ-45 jack (female) Used for connecting a DC power cable 3 FIBER

TX RX

4 – SMA-type coaxial

Duplex LC-type fiber optic adapter

connector (female)

Used for connecting the forward path and

reverse path optical links

Used for connecting the antenna coaxial

cable lead

Fig 5B-A

Note: A detailed description of LED operation is provided in Section 5.

1.4 Digital Expansion Unit Description

The DEU, shown in Figure 6, serves as a service expansion unit and line extender for the Digivance ICS. The DEU provides the following basic functions:

• Optical interface to the DHU and up to six DRUs or DEUs

• Conversion of the forward path digitized optical signal to an electrical bit stream

• Splitting of the electrical bit stream into six separate bit streams

• Conversion of the six forward path electrical bit streams into six digital optical signals

• Conversion of up to six reverse path digital optical signals into six serial bit streams

• Combining of the six reverse path serial bit streams into a single digital composite signal

• Conversion of the single digital composite signal to a digital optical signal

• DC power for powering the DRUs

• Alarm transport via the optical links

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ADCP-75-110 • Issue B • March 2001

3.5 INCHES (89 mm)

11.4 INCHES

15.3 INCHES (389 mm)

(290 mm)

17.2 INCHES (437 mm)

FRONT PANEL

MOUNTING

BRACKET

(BOTH SIDES)

CABLE MANAGEMENT

TRAY

Fig 6B-A

Figure 6. Digital Expansion Unit

1.4.1 Primary Components

The DEU consists of two electronic circuit board assemblies that are mounted within a powder-coated sheet metal enclosure. The metal enclosure provides a mounting point for the electronic assemblies and serves as a heat sink. Except for the fan units, the electronic circuit board assemblies are not user replaceable. The DEU is designed for use within a noncondensing indoor environment such as inside a wiring closet or within an environmentally controlled cabinet. All controls, connectors, and indicators are mounted on the DEU front panel for convenient access. Cable management functions for the power and fiber optic cables are provided by a cable management tray that extends outward from the DEU front panel.

1.4.2 Mounting

The DEU may be used in both rack-mount and wall-mount applications. For rack mount applications, a pair of reversible mounting brackets is provided that allow the DEU to be mounted in either a 19-inch or 23-inch EIA or WECO equipment rack. When rack-mounted, the front panel of the DEU is flush with the front of the rack. The cable management tray extends 3.9 inches (99 mm) beyond the front panel. For wall-mount applications, a pair of holes is provided in the cable management tray which allow the DEU to be mounted on any flat vertical surface. The DEU should be oriented with the front panel facing upward when wall-mounted. Fasteners are provided for rack-mount applications.

1.4.3 Fault Detection

The DEU is designed to detect internal circuitry faults and optical port faults. Various front panel Light Emitting Diode (LED) indicators turn from green to red or yellow when a fault is detected The DEU transports the fault information to the DHU or supporting DEU over the fiber optic link. A corresponding port LED at the DHU or DEU turns from green to red when the DEU reports a fault.

Page 10

ADCP-75-110 • Issue B • March 2001

1.4.4 Optical and Electrical Interface Connections

1.4.5 Powering

The DEU is powered by 120–240 VAC (50–60 Hz) power which is supplied through a standard three-conductor AC power cord. The power cord is provided with the DEU and is 2.5 meters (98 inches) long. A resetable circuit breaker/On-Off switch is provided at the unit front panel. The switch applies power to the DEU internal power supply.

1.4.6 Cooling

Continuous air flow for cooling is provided by dual cooling fans mounted on the right side of the sheet metal housing. A minimum of 3 inches of clearance space must be provided on both the left and right sides of the DEU for air intake and exhaust. An alarm is provided that indicates if a high temperature condition occurs. The cooling fans may be field-replaced if either unit fails.

1.4.7 User Interface

The DEU user interface consists of the various connectors, switches, and LEDs that are provided on the DEU front panel. The DEU user interface points are indicated in Figure 7 and described in Table 3.

(2) AC POWER

ON/OFF SWITCH

(3) OPTICAL PORT

LED INDICATOR

(6 PLACES)

(4) OPT/ELEC PORT

ENABLE/DISABLE

SWITCH (6 PLACES)

(7) UNIT LED

INDICATOR

(1) AC POWER CORD

CONNECTOR

NOTE: SHOWN WITHOUT CABLE MANAGEMENT TRAY

(5) ELECTRICAL PORT

DC POWER JACK

(6 PLACES)

(6) OPTICAL PORT

OPTICAL ADAPTERS

TX-LEFT - RX-RIGHT

(6 PLACES)

(7) HOST PORT

OPTICAL ADAPTERS

TX-LEFT - RX-RIGHT

Figure 7. Digital Expansion Unit User Interface

(8) HOST PORT

LED

INDICATOR

Fig 7B-A

Page 11

ADCP-75-110 • Issue B • March 2001

Table 3. Digital Expansion Unit User Interface

REF No.

1 POWER 3-wire AC power

USER INTERFACE

DESIGNATION

DEVICE FUNCTIONAL DESCRIPTION

Used for connecting the AC power cord

cord connector

2 – I/O rocker switch/

circuit breaker

3 OK/NOK (Ports 1–6) Multi-colored LED

(Red/Green/Yellow)

Provides AC power On/Off control and AC power over current protection

Indicates if the DRU or remote DEU connected to the optical port is normal or faulty or if the optical inputs from the DRU or remote DEU are normal or lost. (see Note)

4 ON/OFF (Ports 1–6) I/O rocker switch Enables or disables corresponding

electrical and optical ports

5DC PWR (Ports 1–6) RJ-45 connector

(female)

6 FIBER (Ports 1–6) Duplex LC-type

fiber optic adapter

Used for connecting a DRU cat 5 power cable to the designated DC power jack

Used for connecting each DRU or remote DEU forward path and reverse path optical link to the designated optical port

7 HOST PORT Duplex LC-type

fiber optic adapter

8 UNIT Multi-colored LED

(Red/Green/Yellow)

9 HOST PORT Multi-colored LED

(Red/Green/Yellow)

Used for connecting the DHU or supporting DEU forward path and reverse path optical link

Indicates if the DEU is normal or faulty. (see Note)

Indicates if the optical inputs from the DHU or supporting DEU are normal or faulty. (see Note)

Note: A detailed description of LED operation is provided in Section 5.

1.5 Terms and Definitions

Refer to Table 4 for a listing of the terms used in this manual and their definition.

TERM DEFINITION

Alarm Response The response to an alarm input. Base Transceiver Station The radio equipment that transmits and receives the voice and

Composite Signal The sum of several combined signals. Digital Expansion Unit The unit that extends a single optical interface to multiple optical

Digital Host Unit The unit that converts and provides the digital source signal to all DEUs

Table 4. Terms and Definitions

control channels to and from the cellular handsets.

interfaces or that extends an optical run.

and DRUs and converts summed inputs from DEUs and DRUs.

(Continued)

Table 4. Terms and Definitions (Continued)

Page 12

ADCP-75-110 • Issue B • March 2001

TERM DEFINITION

Digital Remote Unit The unit that interfaces the in-building user to the Digivance

optical transport Digitized RF Signal The RF signal in a digitized form. Forward Path Signal A signal that travels from the base station to the cell phone. Major Alarm An alarm condition that applies when any fault (except high

temperature) occurs. Minor Alarm The alarm condition that applies when a high temperature condition

occurs. (> 70º C/158º F) Mute To force a forward path RF signal to a “no signal” state Normal State The operating state after power-up is completed and no faults are

detected. Port An RF, optical, or electrical interface point. Port Alarm A fault that affects only the unit connected to that port. Power-Up State The period between the application of power to a unit and the

normal state. This period includes time for circuit stabilization and

initialization operations. Reverse Path Signal A signal that travels from one or more cell phones to the base station. Transport Alarm Signal An alarm signal transported over the fiber optic link. Unit Alarm A fault within a unit that usually affects all connected ports.

1.6 Specifications

Refer to Table 5 for the Digivance ICS system specifications.

PARAMETER SPECIFICATION REMARKS

Optical - All Units

Fiber type Multimode 50 or 62.5 micron core Two fibers per link Maximum Fiber Length 500 m

Optical Output Power –10 to +4 dBm Optical Wavelength 850 nm

Environmental

Operating Temperature 0º to 50º C (32º to 122º F) Storage Temperature –30º to +70º C (–22 to 158º F) Humidity No condensation Weather resistance Indoor installation only

Table 5. System Specifications

750 m

With 62.5 micron core With 50 micron core

(Continued)

Page 13

ADCP-75-110 • Issue B • March 2001

PARAMETER SPECIFICATION REMARKS

RF Forward Path

System Bandwidth 25 MHz Frequency range Cellular: 869 to 894 MHz Output power +13 +/– 1 dB composite Gain variation +/– 3 dB

CDMA ACPR1 < –45 dBc Spurious Output < –35 dBm DHU input signal level –20 dBm maximum Provides a +13 dBm RF output

RF Reverse Path

System bandwidth 25 MHz Frequency Range US Cellular: 824 to 849 MHz Gain 10 +/– 1 dB Gain Variation +/– 3 dB

Automatic Gain Limiting

Noise Figure < 12 dB 10 + 10 log n (n = # of users) DHU output signal level –30 dBm maximum With a –40 dBm composite

Physical/Electrical - DHU

Weight 17.5 lbs (7.9 kg) RF connection Type N female Alarm connection Screw terminals (14–26 AWG) NO, NC, and COM Optical connection Duplex LC adapter DC power connection RJ-45 female Power source 120–240 VAC, 50–60 Hz Power consumption 24 W typical Current rating 85–250 VAC, 2 Amp input

Table 5. System Specifications (Continued)

Over frequency, temperature, and unit-

< 1.5 dB variation

Per 1.25 MHz CDMA channel

> +35 dBm

signal at the DRU

Over frequency, temperature, and unit-unit

< 1.5 dB variation

Per 1.25 MHz CDMA channel

Prevents A/D saturation with large inputs. Disabled for composite RF input < –40 dBm

maximum input signal at the DRU

Page 14

(Continued)

ADCP-75-110 • Issue B • March 2001

Table 5. System Specifications (Continued)

PARAMETER SPECIFICATION REMARKS

Physical/Electrical - DEU

Weight 17.5 lbs (7.9 kg) Optical connection Duplex LC adapter DC power connection RJ-45 female Power source 120–240 VAC, 50–60 Hz Power consumption 22 W typical Current rating 85–250 VAC, 2 Amp input

Physical/Electrical DRU

2 lbs (0.9 kg)

Weight RF connection SMA female Antenna types

Ceiling mount omnidirectional Directional panel 90º directional panel Ceiling mount hallway

Center mount (2.5 dBi gain) Wall mount (8 dBi gain) Corner mount (7.5 dBi gain)

Center mount( 4 dBi gain) Optical connection Duplex LC adapter DC power connection RJ-45 female Power source 48 +/– 1 VDC nominal 48 VDC Power consumption 17 W typical Current rating 48 VDC, 350 mA input

Page 15

ADCP-75-110 • Issue B • March 2001

2 INSTALLATION PLANNING AND SYSTEM DESIGN

This section provides installation planning information and basic system design recommendations for RF engineers that will be designing and installing an in-buildling coverage solution using the Digivance ICS. System design and planning services are available from ADC if required. Refer to section 6 of this manual for additional information.

2.1 Base Station Interface Requirements

The DHU may be interfaced either locally or remotely with the BTS. As referenced in this publication, the BTS could be either a microcell or a cell site base station. With a local interface, a hard-wire connection is provided between the DHU and the BTS (microcell) using coaxial cables. With a remote interface, an over-the-air connection is provided between the DHU and the BTS (cell site base station) using a donor antenna.

2.1.1 Local BTS (Microcell) Interface

A local interface between the DHU and the BTS (microcell) over coax requires specific RF input and output signal levels at the DHU and BTS. The correct levels can be provided at the BTS and DHU using the Local Interface Unit (LIU). The LIU is an accessory item that provides adjustable gain or attenuation in both the RF forward and reverse path. The level of the RF output signal from the BTS will vary depending on the type of BTS. Therefore, it will generally be necessary to add some gain or some attenuation to the forward path (downlink) signal to provide the recommended composite maximum RF input signal level at the DHU which is–20 dBm. When the level of the RF input signal at the DHU is –20 dBm, the level of the RF output signal at the DRU will be +13 dBm which is the maximum allowed.

In the reverse path, the input signal level required at the BTS will also vary depending on the type of BTS. When the level of the reverse path (uplink) signal at the DRU is at the recommended composite maximum of –40 dBm, the level of the RF output signal from the DHU is –30 dBm. Therefore, it may be necessary to add some gain or attenuation to the reverse path signal in order to achieve the required RF input signal level at the BTS. A block diagram showing a typical local DHU to BTS interface is provided in Figure 8.

DIRECTIONAL ANTENNA

TO/FROM HANDSETS

T1 LINK

TO SWITCH

LOCAL BASE

TRANSCEIVER

STATION

(MICRO CELL)

FORWARD

(DOWNLINK)

REVERSE

(UPLINK)

LOCAL

INTERFACE

UNIT

-20 dBm

(COMPOSITE

MAX)

-30 dBm

(COMPOSITE

MAX)

DIGITAL

HOST

UNIT

+13 dBm

(COMPOSITE

OPTICAL LINK

MAX)

DIGITAL

REMOTE

UNIT

-40 dBm

(COMPOSITE

MAX)

Fig 8B-A

Page 16

Figure 8. Local BTS Interface Block Diagram

ADCP-75-110 • Issue B • March 2001

The LIU is rack or wall mountable and is powered by 120–240 VAC (50–60 Hz) power. Refer to the Digivance Local Interface Unit User Manual (ADCP-75-113) for a complete description of the LIU.

2.1.2 Remote BTS (Cell Site Base Station) Interface

A remote interface between the DHU and the BTS (cell site base station) via a donor antenna requires specific RF input and output signal levels at the DHU and antenna. The correct levels at the DHU and antenna can be provided using the Remote Interface Unit (RIU). The RIU is an accessory item that provides adjustable gain or attenuation in both the RF forward and reverse paths. The RIU connects to a directional antenna through a duplexer which provides separate forward and reverse path connections for the DHU. In the forward path (downlink), the RIU provides the recommended composite maximum RF input signal level at the DHU which is –20 dBm. When the level of the RF input signal at the DHU is –20 dBm, the level of the RF output signal at the DRU is +13 dBm which is the maximum allowed.

In the reverse path, the required RF output signal level to the donor antenna will vary depending on the distance from the BTS. When the level of the reverse path (uplink) signal at the DRU is at the recommended composite maximum level of –40 dBm, the level of the RF output signal from the DHU is –30 dBm. Therefore, it may be necessary to add some gain or attenuation to the reverse path signal in order to achieve the required output signal level at the RIU antenna port. A block diagram showing a typical remote DHU to BTS interface is provided in Figure 9.

The RIU is rack or wall mountable and is powered by 120–240 VAC (50–60 Hz) power. Refer to the Digivance Remote Interface Unit User Manual (ADCP-75-114) for a complete description of the RIU.

DIRECTIONAL

ANTENNA TO/FROM

CELL SITE BTS

REVERSE

(UPLINK)

REMOTE

INTERFACE

UNIT

FORWARD

(DOWNLINK)

(COMPOSITE

MAX)

DIGITAL

HOST

UNIT

-30 dBm

(COMPOSITE

MAX)

OPTICAL LINK

Figure 9. Remote BTS Interface Block Diagram

DIRECTIONAL ANTENNA

TO/FROM HANDSETS

+13 dBm

(COMPOSITE

MAX)

DIGITAL

REMOTE

UNIT

-40 dBm

(COMPOSITE

MAX)-20 dBm

Fig 9B-A

Page 17

ADCP-75-110 • Issue B • March 2001

2.2 Location and Mounting Requirements

2.2.1 DHU and DEU Location and Mounting Requirements

The DHU and the DEU may be either rack mounted or wall mounted. Fasteners (both metric and US standard) are included with each unit for rack mount applications. A pair of reversible mounting brackets is provided that allows the unit to be mounted in either a 19-inch or 23-inch EIA or WECO equipment rack. When rack-mounted, the front panel of the unit is flush with the front of the rack. The cable management tray extends 3.9 inches (99 mm) beyond the front panel. Both the DHU and DEU occupy 3.5 inches (89 mm) of rack space. Make sure the mechanical loading of the rack will be even to avoid a hazardous condition such as a severely unbalanced rack. The rack should safely support the combined weight of all the equipment it holds.

For wall-mount applications of the DHU or DEU, a pair of holes is provided in the cable management tray that allows the unit to be mounted on any flat vertical surface. The mounting holes are spaced 11.66 inches (296 mm) apart. Orient the DHU/DEU so the front panel faces up when mounted. Appropriate fasteners for wall mounting must be provided by the installer. It is recommended that a backer board such as 3/4-inch plywood be installed over the mounting surface to provide a secure base for attaching the DHU or DEU.

Mount the DHU and DEU in a non-condensing indoor environment such as inside a wiring closet or within an environmentally controlled cabinet. All controls, connectors, and indicators are mounted on the front panel. Route all cables to the front panel for connection. Use the cable retainers provided on the cable management tray to secure the fiber optic, DC power, and local alarm system cables.

The maximum recommended ambient temperature for the DHU and DEU is 50º C (122º F). Allow sufficient air circulation or space between each unit when installed in a multi-unit rack assembly because the operating ambient temperature of the rack environment might be greater than room ambient. Provide a minimum clearance of 3 inches (76 mm) on both the left and right sides of the unit for air intake and exhaust. Refer to Figure 2 for the DHU dimensions and Figure 6 for the DEU dimensions.

2.2.2 DRU Location and Mounting Requirements

The DRU may be wall-mounted or ceiling-mounted. The DRU is equipped with four integral mounting feet that allow it to be fastened to any flat vertical or horizontal surface. Holes are provided in the mounting feet for inserting fasteners. Appropriate fasteners for securing the DRU to the selected mounting surface must be provided by the installer.

Mount the DRU in a non-condensing indoor environment. Route the DC power cable and fiber optic links to the DRU front panel for connection. Route the antenna coaxial cable to the DRU rear panel for connection. Provide a minimum of 3 inches (76 mm) of clearance space (more if cover will be required) on all sides of the DRU (except the bottom) to ensure there is adequate air circulation for cooling. In addition, at least one surface of the DRU installation area must be open to the interior of the building. Refer to Figure 4 for the DRU dimensions.

Page 18

2.3 Powering Requirements

2.3.1 DHU and DEU Powering

The DHU and DEU are powered by 120–240 VAC (50–60 Hz) which is supplied through a standard three-conductor AC power cord. The 120 VAC power cord is provided with the unit and is 98 inches (2.5 m) long. The DHU has a power consumption rating of 24 watts and the DEU has a power consumption rating of 22 watts. Locate each unit so that an AC outlet is within the reach of the power cord.

If back-up powering is required, it is recommended that the building Uninterruptible Power Supply (UPS) system be used to provide back-up power to the DHU and DEU in the event of an AC power outage.

2.3.2 DRU Powering

The DRU is powered by 48 VDC power which is supplied to the DRU through the front panel RJ-45 connector. Power to the DRU may be provided by the DHU, DEU, or by a 120 VAC to 48 VDC power converter (available separately as an accessory item) plugged into a properly grounded 120 VAC outlet. The DRU has a power consumption rating of 17 watts.

ADCP-75-110 • Issue B • March 2001

If the DRU will be powered by the DHU or DEU, the power cable must be fabricated on-site by the installer. Use category 5 twisted pair cable as the power supply cable when the DRU is powered by the DHU or DEU. Route the power cable between the power source and the DRU. Terminate both ends of the power cable with a male RJ-45 connector.

The DRU may be powered locally by the AC/DC converter, shown in Figure 10, which is available as an accessory item. The converter is a UL Listed stand alone Limited Power Supply (LPS) unit with a rated output of 48 VDC at 1.2 A. The converter is equipped with a 6-foot (1.8 m) DC power cable which is terminated with an RJ-45 male connector. The converter is powered by 120–240 VAC (50–60 Hz) power which is supplied though a standard three-conductor AC power cord. The 120 VAC power cord is 6 feet (1.8 m) long and is provided with the converter.

15988-A

Figure 10. AC/DC Power Converter

Page 19

ADCP-75-110 • Issue B • March 2001

2.4 Optical Options and Requirements

Each DHU and its associated DEUs and DRUs are connected over a pair of fiber optic links. One link transports the forward path optical signal and the other link transports the reverse path optical signal. Either 50 or 62.5 micron core multi-mode fiber optic cable may be used for the optical link. If 50 micron cable is used, the optical link may be up to 750 meters (2,460.75 ft) in length. If 62.5 micron cable is used, the optical link may be up to 500 meters (1,640.5 ft) in length.

Whenever possible, use conduit or a guideway such as the FiberGuide system to route the optical links between the DHU, the DEUs, and the DRUs. Avoid routing optical fibers through ladder type cable racks or troughs that do not provide sufficient support to limit bending or prevent accidental damage. Tie-wrapping is not recommended as a means of securing fiber optic cables. Provide sufficient slack at each unit for connecting each fiber to the required port. Fibers may be preterminated or terminated on-site using field-installable LC type connectors.

2.5 Coaxial Cable Requirements

The DHU interfaces either locally (see Figure 8) or remotely (see Figure 9) with the BTS through coaxial cable connections. In a local interface with the BTS, coaxial cables are required to link the DHU with the LIU and the LIU with the BTS. In a remote interface, coaxial cables are required to link the DHU with the RIU and the RIU with the donor antenna. The DHU, LIU, and RIU are equipped with N-type female connectors for connecting the forward and reverse path coaxial cables. Use high performance, flexible, low loss 50-ohm coaxial communications cable (RG 400 or equivalent) for all connections.

2.6 System Expansion Planning

The total number of DRU’s that can be served is limited by the cumulative noise effect caused by antenna combining. This number cannot be determined until the radius distance of coverage required at the DRU antenna is determined and the path loss attributed to the structure are known. The system design requires that the carrier to noise differential be greater than the customer’s desired signal to noise ratio.

If it is likely that the system will be expanded in the future, locate the DHU in such a way that it can either be used as a hub for an expanded system or replaced with a DEU which is then connected to a relocated DHU. It should also be noted that a DEU can be used as an optical regenerator. A DRU may sometimes need to be located at a point that is beyond the 500 or 750 meter limit (depending on fiber type) imposed by the optical link. The solution is to install a DEU at the maximum optical link limit (500 or 750 meters) from the DHU. This provides an additional 500 or 750 meters of optical link beyond the DEU for connecting the DRU.

Page 20

2.7 DRU Antenna Options

Four antennas, shown in Figure 11, are available from ADC for use with the DRU. All antennas include a 6 foot (1.8 m) long 50-ohm coaxial cable (equipped with SMA male connector) for connection to the DRU. The DRU is equipped with an SMA female connector for connecting the antenna cable.

The DRU antennas are designed for unobtrusive mounting within an office environment. Each type of antenna provides a specific coverage pattern in order to accommodate the shape of the area where coverage is required. The ceiling-mount omnidirectional antenna provides 2.5 dBi of gain and is designed to mount in the center of the coverage area. The directional panel antenna provides 8 dBi of gain and is designed to mount vertically on one side of the coverage area. The 90º panel antenna provides 7.5 dBi of gain and is designed to mount vertically in the corner of the coverage area. The ceiling mount hallway antenna provides 4 dBi of gain and is designed to mount in the center of long corridors. Other antennas other than those offered by ADC may also be used if required.

Note: To comply with Maximum Permissible Exposure (MPE) requirements, antennas must be installed to provide at least 20 centimeters of separation from all persons per FCC 47 CFR part 2.1091.

ADCP-75-110 • Issue B • March 2001

MOUNTING STUD

LENGTH - 1.5 INCHES

CEILING-MOUNT

OMNIDIRECTIONAL

8.65 INCHES

DIRECTIONAL PANEL

(WALL-MOUNT)

ALL ANTENNAS ARE EQUIPPED WITH

A 72-INCH RG58/U CABLE TERMINATED

WITH A MALE SMA CONNECTOR

2.26 INCHES

6.14 INCH DIAMETER

1.05 INCH DEPTH

3.88 INCHES

CEILING-MOUNT

HALLWAY

2.38 INCHES

6.55 INCHES

2.38 INCHES 90 DEGREE DIRECTIONAL

(CORNER MOUNT)

MOUNTING STUD

LENGTH - 1.5 INCHES

7.26 INCHES

7.90 INCHES

8.65 INCHES

MOUNTING STUD

LENGTH - 3.85 INCHES

16237-A

Figure 11. DRU Antenna Options

Page 21

ADCP-75-110 • Issue B • March 2001

2.8 Local Alarm System Reporting Requirements

The DHU provides normally open (NO) and normally closed (NC) dry alarm contacts for reporting minor and major alarms to an external alarm system. A minor alarm is defined as a high temperature condition. A major alarm is defined as any fault condition except high temperature. Connections to the alarm contacts are provided through a screw-type terminal strip. Use #26 AWG insulated solid copper wire for the alarm wires. If an external alarm system is not in use, no alarm connections are required.

2.9 Maintenance Requirements

The Digivance ICS requires no regular maintenance to insure continuous and satisfactory operation. Maintenance, as it applies to the Digivance ICS, primarily involves diagnosing and correcting service problems as they occur. Faults and failures arising from within the Digivannce ICS will generate an external alarm response which includes lighting an LED indicator(s) and closing or opening a set of alarm contacts. When an alarm is reported, it will be necessary to isolate the source of the problem by observing the LED indicators on each unit and then performing specified tests to isolate the problem. Once the source of the fault is isolated, the appropriate action can be taken to correct the problem. The only unit components that can be replaced are the cooling fans which mount in the DHU and the DEU. The failure of any other component within a unit will require replacement of the unit. Basic troubleshooting procedures are provided in section 5 of this manual.

2.10 System Design Recommendations

Follow a systematic process when designing an in-building coverage solution. The following sub sections outline the four phases of the in-building coverage solution design process. System design and planning services are available from ADC if required. Refer to section 6 of this manual for additional information.

2.10.1 Phase One - Initial Evaluation

Qualify the Installation: Confirm that there are no extenuating circumstances that would

prevent a successful installation such as: extreme cellular system issues (blocking, severe interference, site problems, etc.), building issues, power issues, or safety issues (site should not present any hazards or conditions that would make operation of the equipment unsafe).

Analyze the RF Situation: Determine how the system RF link to the outside world will be

provided. Will it be a direct feed from a BTS (microcell) or an over-the-air connection via a donor antenna? If it is a donor antenna, is the customer within the coverage footprint of a serving cell or better? The coverage can be determined during the preliminary walkthrough by checking the downlink Received Signal Strength Indication (RSSI) outside the building with a unity gain sampling antenna. Sometimes a rooftop reading is needed to obtain a sufficient signal level. Note that it is an FCC violation to expand the normal coverage footprint of a cellular site with an in-building product. In addition, consider the impact the system will have on traffic, especially the busy hour. Confirm with the service provider that the expected increase in the volume of calls will be addressed (if needed), possibly with additional equipment such as additional channels or a microcell.

Page 22

ADCP-75-110 • Issue B • March 2001

Determine the Amount of Building Attenuation: If a donor antenna will provide the RF link

to the BTS, determine if there is enough signal isolation between the donor antenna and the inbuilding system to avoid a feedback loop and signal degradation. This step can often be accomplished during the preliminary walkthrough.

Discuss Installation with Building Management and Engineering: Discuss all initially

anticipated Digivance ICS coverage areas (including any obviously desirable cable routings,

equipment installations, power and mechanical requirements) with the authorized client and building personnel for an initial approval/confirmation. This gives a good estimate of the extent of the system work needed. Occasionally, some of the system design work can be accomplished at this point.

2.10.2 Phase Two - System Design

Determine forward and reverse path loss and then design for unity gain on the uplink and maximum power out of the DRU on the downlink: The overall purpose of the

Digivance ICS is to transparently overcome attenuation losses, not to provide additional gain beyond what is required to bring the signal to unity gain. Complete the following steps to make this determination:

1. Determine the in-building reverse path (uplink) losses at typical operating frequencies and distances from the subscriber handset (terminal) to the DRU. This information will be used to determine the optimal uplink signal level to the outside world.

2. Determine the typical composite cell site Effective Radiated Power (ERP) into the system. Calculate the interface adjustment required to feed the required downlink signal level to the DHU in order to drive the DRU output signal at the desired level.

Determine the location of the DHU and its RF and AC power sources: Complete the

following steps to make this determination:

1. Determine where and how the DHU will be mounted.

2. Determine the location of the DHU AC power source.

3. Determine the RF source (LIU with BTS or RIU with BTS through donor antenna) for the DHU.

4. If an LIU connection with the BTS is required, determine the distance to the DHU.

5. If a RIU connection with the BTS is required, determine what type of antenna is needed and where it can be mounted.

6. Determine the attenuation or amplification requirements for the DHU to BTS interface.

Page 23

ADC DVICS800 1 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual