ADC DCX0801B, DCX1902B User Manual
ADCP-75-192
Issue 1
December 2005
Digivance
CXD Multi-Band
Distributed Antenna System
Operation Manual
1343155 Rev A
ADCP-75-192
Issue 1
December 2005
Digivance
CXD Multi-Band
Distributed Antenna System
Operation Manual
1343155 Rev A
ADCP-75-192 • Issue 1 • December 2005 • Preface
COPYRIGHT
2005, ADC Telecommunications, Inc.
All Rights Reserved
Printed in the U.S.A.
REVISION HISTORY
ISSUE DATE REASON FOR CHANGE
Issue 1 12/2005 Original release
LIST OF CHANGES
The technical changes incorporated into this issue are listed below.
SECTION IDENTIFIER DESCRIPTION OF CHANGE
- - Original release
TRADEMARK INFORMATION
ADC and Digivance are registered trademarks of ADC Telecommunications, 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 73476
(in U.S.A. or Canada) or 952-917-3476 (outside U.S.A. and Canada), or by e-mail to wireless.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) 917-3475
Fax: (952) 917-1717
TABLE OF CONTENTS
Content Page
ABOUT THIS MANUAL ...................................................................... vii
RELATED PUBLICATIONS .................................................................... vii
ADMONISHMENTS ....................................................................... viii
GENERAL SAFETY PRECAUTIONS.............................................................. viii
SAVE WORKING DISTANCES .................................................................. ix
COMPLIANCE STATEMENT ................................................................... ix
ACRONYMS AND ABBREVIATIONS ............................................................... x
1 INTRODUCTION .................................................................... 1-1
DIGIVANCE CXD SYSTEM OVERVIEW ...................................................... 1-1
2
2.1 Basic Components ............................................................. 1-2
2.2 General Description ............................................................ 1-2
2.3 Local Service Interface.......................................................... 1-3
2.4 Remote NOC Interface .......................................................... 1-4
3 SYSTEM FUNCTIONS AND FEATURES...................................................... 1-4
3.1 Fiber Optic Transport ........................................................... 1-4
3.2 Control and Monitoring Software ................................................... 1-5
3.3 Fault Detection and Alarm Reporting................................................. 1-5
3.4 Powering ................................................................... 1-5
3.5 Equipment Mounting and Configuration ............................................... 1-8
3.6 Hub Subsystem Assemblies....................................................... 1-8
3.7 RAN Subsystem Assemblies ..................................................... 1-11
3.8 Communication Interfaces....................................................... 1-14
ADCP-75-192 • Issue 1 • December 2005 • Preface
FRONT MATTER
SECTION 1
OVERVIEW
SECTION 2
DESCRIPTION
1 INTRODUCTION .................................................................... 2-1
2 DIGITAL CHASSIS ................................................................... 2-2
3 RF CHASSIS....................................................................... 2-5
4 RADIO ACCESS NODE (RAN) ........................................................... 2-9
4.1 RAN cabinet ................................................................ 2-10
5 ELEMENTS COMMON TO HUB AND RAN ................................................... 2-11
5.1 Central Processor Unit (CPU) .................................................... 2-11
5.2 System Interface (STF2) ........................................................ 2-13
5.3 Sonet Interface (SIF) .......................................................... 2-15
5.4 Small Form-Factor Optical Transceiver (SFP) ......................................... 2-16
6 HUB SPECIFIC MODULES ............................................................. 2-17
2005, ADC Telecommunications, Inc.
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ADCP-75-192 • Issue 1 • December 2005 • Preface
TABLE OF CONTENTS
Content Page
6.1 Full Band Hub Down Converter (FBHDC) ............................................. 2-17
6.2 Forward Simulcast Card (FSC) .................................................... 2-18
6.3 Hub Upconverter Card (HUC) ..................................................... 2-19
6.4 Reverse Simulcast Card (RSC) .................................................... 2-20
6.5 Hub Reference Module (HRM) ................................................... 2-22
6.6 Ethernet Hub ................................................................ 2-24
6.7 BTS Interface Module (BIM) ..................................................... 2-25
6.8 Attenuator Shelf .............................................................. 2-28
7 RADIO ACCESS NODE (RAN) SPECIFIC MODULES ............................................. 2-29
7.1 Ran Down Converter (RDC or RDC2) ............................................... 2-29
7.2 Ran Up Converter (RUC2.X or RUC3) ............................................... 2-30
7.3 AC Power Entry Controller (APEC) .................................................. 2-31
7.4 DC Power Entry Controller (DPEC) ................................................. 2-32
7.5 CompactPCI Power Supply (cPCI P/S) ............................................... 2-34
7.6 RF Assembly Module (RFA) ..................................................... 2-35
7.7 Specifications ............................................................... 2-41
SECTION 3
NETWORK AND SYSTEM INSTALLATION AND SETUP
1 INTRODUCTION ..................................................................... 3-2
2 NETWORKING OVERVIEW .............................................................. 3-2
3 NODE IDENTIFICATION SCHEMES ......................................................... 3-3
4 IDENTIFICATION USING THE NETWORK IP RECEIVER/SENDER SYSTEM................................ 3-3
5 HUB EQUIPMENT IDENTIFICATIONS ....................................................... 3-3
6 ASSIGNING TENANTS ................................................................. 3-5
6.1 Understanding Tenant MIB Indexing.................................................. 3-5
6.2 BTS Connection MIB ............................................................ 3-6
6.3 Pathtrace Format .............................................................. 3-9
7 TENANT CONFIGURATION ............................................................. 3-13
7.1 Setting Protocol .............................................................. 3-13
7.2 Setting Channels ............................................................. 3-13
7.3 Setting Hub Measured Forward Gain ................................................ 3-13
7.4 Setting RAN Measured Forward Gain ................................................ 3-13
7.5 Setting FSC Gain ............................................................. 3-13
7.6 Setting RAN Forward Gain Offset ................................................... 3-14
7.7 Setting Reverse Gain........................................................... 3-14
7.8 Setting Reverse Cable Loss ...................................................... 3-14
7.9 Using Tenant Reset............................................................ 3-14
7.10 Enabling FGC / RGC............................................................ 3-14
7.11 Using Tenant Mode ............................................................ 3-15
7.12 Enabling / Disabling Delay Compensation ............................................. 3-15
7.13 Setting Forward / Reverse Delay Skew ............................................... 3-15
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2005, ADC Telecommunications, Inc.
TABLE OF CONTENTS
Content Page
7.14 Enabling / Disabling RAN slots.................................................... 3-15
7.15 Forward/Reverse Target Delay .................................................... 3-16
7.16 FSC Attenuator Offsets ......................................................... 3-16
7.17 Target Simulcast Degree........................................................ 3-16
7.18 Module Attenuators ........................................................... 3-16
8 MANAGING THE TENANT OAM ADDRESS AND HOSTNAME TABLES ................................. 3-17
8.1 RAN Ordering ............................................................... 3-17
8.2 Bracketing of Lost RANs ........................................................ 3-18
8.3 Clearing of RANs ............................................................. 3-18
9 HUB NODE ACCESS/MANAGEMENT ...................................................... 3-18
9.1 Managing Hub Nodes .......................................................... 3-18
9.2 Identification using the Network IP Receiver/Sender ..................................... 3-18
9.3 Accessing Nodes Locally........................................................ 3-19
9.4 Accessing Nodes via TCP/IP ..................................................... 3-19
9.5 Using a Third Party Network Management System with Digivance CXD ......................... 3-20
10 CONFIGURING THE HUBMASTER NODE.................................................... 3-20
10.1 Utilizing The Configure-Hubmaster Script ............................................ 3-21
10.2 Using Dynamic Host Configuration Protocol with Digivance CXD ............................. 3-22
11 CONFIGURING THE HUB “SLAVE” AND RAN NODES ........................................... 3-24
11.1 Managing The Hub Node MIB..................................................... 3-24
11.2 Managing the RAN Node MIB..................................................... 3-26
ADCP-75-192 • Issue 1 • December 2005 • Preface
SECTION 4
BTS INTEGRATION
1 BTS VALIDATION ................................................................... 4-1
2 PATH BALANCING ................................................................... 4-1
2.1 Forward Path Balancing ......................................................... 4-2
2.2 Reverse Path Balancing ......................................................... 4-4
2.5 Functional RAN Call Verification ................................................... 4-5
SECTION 5
SOFTWARE UPDATES
1 SOFTWARE RELEASE DELIVERABLE ....................................................... 5-1
2 RELEASE NOTES .................................................................... 5-1
3 UPGRADING EXISTING SYSTEM.......................................................... 5-2
3.1 Preliminary Steps ............................................................. 5-2
3.2 Upgrade Steps ............................................................... 5-2
4 VERIFICATION ..................................................................... 5-3
5 FAILED UPGRADES .................................................................. 5-4
6 FPGA UPDATES .................................................................... 5-5
7 BACKUP/RESTORE .................................................................. 5-5
7.1 Backup .................................................................... 5-5
2005, ADC Telecommunications, Inc.
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ADCP-75-192 • Issue 1 • December 2005 • Preface
TABLE OF CONTENTS
Content Page
7.2 Restore..................................................................... 5-5
7.3 Adding/Removing SNMP Traps ..................................................... 5-6
8 UPDATING SPARE CPUS ............................................................... 5-6
9 MIB EXTRACTION.................................................................... 5-7
1 INTRODUCTION ..................................................................... 6-1
2 FORWARD GAIN MANAGEMENT .......................................................... 6-1
3 REVERSE AUTOMATIC GAIN CONTROL......................................................6-2
4 FORWARD DELAY MANAGEMENT ......................................................... 6-2
5 REVERSE DELAY MANAGEMENT.......................................................... 6-2
6 FORWARD CONTINUITY ............................................................... 6-2
7 REVERSE CONTINUITY ................................................................ 6-2
7.1 Noise Test ................................................................... 6-3
7.2 RAN Down Converter (RDC2) Tone Test ............................................... 6-3
7.3 Hub Up Converter (HUC) Tone Test .................................................. 6-3
8 PA OVERPOWER PROTECTION ........................................................... 6-4
9 HUB OVERPOWER PROTECTION .......................................................... 6-4
SECTION 6
AUTONOMOUS SOFTWARE FUNCTIONALITY
SECTION 7
MIB STRUCTURE
1 MIB RELATIONSHIPS ................................................................. 7-1
2 HARDWARE RELATIONSHIPS............................................................ 7-3
2.1 Hub/RAN Connection Relationships: ................................................. 7-3
2.2 Tennant Relationships ........................................................... 7-3
SECTION 8
GENERAL INFORMATION
1 WARRANTY/SOFTWARE ............................................................... 8-1
2 SOFTWARE SERVICE AGREEMENT ........................................................ 8-1
3 REPAIR/EXCHANGE POLICY ............................................................. 8-1
4 REPAIR CHARGES ................................................................... 8-2
5 REPLACEMENT/SPARE PRODUCTS ........................................................ 8-2
6 RETURNED MATERIAL ................................................................ 8-2
7 CUSTOMER INFORMATION AND ASSISTANCE ................................................. 8-3
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2005, ADC Telecommunications, Inc.
ABOUT THIS MANUAL
This Operation Manual provides the following information:
• An overview of the Digivance CXD system.
• A description of the basic system components including the Digital Chassis, RF
Chassis, RAN, CPU, STF2, FBHDC, HUC, SIF, FSC, RSC, RDC, RUC, APEC,
DPEC, cPCI Power Supplies, and RFA.
• Procedures for turning-up the system and verifying that the system is functioning
properly.
• Procedures for maintaining the system including troubleshooting problems and
replacing faulty components.
• Product warranty, repair, return, and replacement information.
The procedures for installing the Hub and RAN equipment and for installing and using the
EMS software are provided in other publications which are referenced in the Related
Publications section and at appropriate points within this manual.
ADCP-75-192 • Issue 1 • December 2005 • Preface
RELATED PUBLICATIONS
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,
extension 73476 (in U.S.A. or Canada) or 952-917-3476 (outside U.S.A. and Canada).
Title/Description ADCP Number
Digivance CXD/NXD Hub Installation and Maintenance Manual 75-193
Provides instructions for installing and maintaining the Digivance CXD Hub
equipment.
Digivance CXD Radio Access Node Installation and Maintenance Manual 75-194
Provides instructions for installing and maintaining the Digivance CXD Radio
Access Node (RAN).
Digivance CXD/NXD SNMP Agent and Fault Isolation User Guide 75-195
Provides instructions for using the Digivance SNMP Agent to control and
monitor the system and software and troubleshooting system performance.
Digivance CXD /NXD Element Management System User Manual 75-199
Provides instructions for using the Digivance EMS to control and monitor the
system and software and troubleshooting system performance.
2005, ADC Telecommunications, Inc.
Page vii
ADCP-75-192 • Issue 1 • December 2005 • Preface
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
Danger: This equipment uses a Class 1 Laser according to FDA/CDRH 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 transceiver 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 transceiver 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.
Danger: 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 Digital Chassis and other accessory components are powered by 48 VDC
power which is supplied over customer-provided wiring. To prevent electrical shock when
installing or modifying the power wiring, disconnect the wiring at the power source before
working with uninsulated wires or terminals.
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2005, ADC Telecommunications, Inc.
ADCP-75-192 • Issue 1 • December 20 05 • Preface
Caution This system is a RF Transmitter and continuously emits RF energy. Maintain 3 foot
minimum clearance from the antenna while the system is operating. Wherever possible, shut
down the RAN before servicing the antenna.
Caution: Always allow sufficient fiber length to permit routing of patch cords and pigtails
without severe bends. Fiber optic patch cords or pigtails may be permanently damaged if bent
or curved to a radius of less than 2 inches (50 mm).
Caution: Exterior surface of the RAN may be hot. Use caution during servicing.
Caution: Hazardous voltages are present. The inverter located in the HUB FIR converts 12
VDC to 120 VAC. Use caution when servicing the equipment.
SAFE WORKING DISTANCES
The Digivance CXD, when connected to an antenna, radiates radio frequency energy. To
comply with Maximum Permissible Exposure (MPE) requirements, the maximum composite
output from the antenna cannot exceed 1000 Watts EIRP and the antenna must be permanently
installed in a fixed location that provides at least 6 meters (20 feet) of clearance.
For the Occupational Worker, safe working distance from the antenna depends on the workers
location with respect to the antenna and the number of wireless service providers being
serviced by that antenna.
Emission limits are from OET Bulletin 65 Edition 97-01, Table 1 A.
COMPLIANCE STATEMENT
Each respective SMR, Cellular, and PCS system in this CXD platform is singularly FCC and
IC approved. Information in this manual explains applicable portions of these systems.
FCC: This Digivance CXD complies with the applicable sections of Title 47 CFR Part 15, 22,
24 and 90.
The Digivance CXD Hub has been tested and found to comply with the limits for a Class A
digital device, pursuant to Part 15 of the FCC rules. These limits are designed to provide
reasonable protection against harmful interference when the equipment is operated in a
commercial environment. This equipment generates, uses and can radiate radio frequency
energy and, if not installed and used in accordance with the instruction manual, may cause
harmful interference to radio communications.
Changes and Modifications not expressly approved by the manufacturer or registrant of this
equipment can void your authority to operate this equipment under Federal Communications
Commissions rules.
2005, ADC Telecommunications, Inc.
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ADCP-75-192 • Issue 1 • December 2005 • Preface
In order to maintain compliance with FCC regulations, shielded cables must be used with this
equipment. Operation with non-approved equipment or unshielded cables is likely to result in
interference to radio & television reception.
ETL: This equipment complies with ANSI/UL 60950-1 Information Technology Equipment.
This equipment provides the degree of protection specified by IP24 as defined in IEC
Publication 529. Ethernet signals not for outside plant use.
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.
IC: This equipment complies with the applicable sections of RSS-131. The term “IC:” before
the radio certification number only signifies that Industry Canada Technical Specifications
were met.
Wind Loading: The CXD RAN is able to withstand wind loads up to 150 mph.
ACRONYMS AND ABBREVIATIONS
The acronyms and abbreviations used in this manual are detailed in the following list:
AC Alternating Current
ANT Multi-band Antenna
APEC AC Power Entry Card
AWG American Wire Gauge
BER Bit Error Rate
BIM Base Station Interface Module
BTS Base Transceiver Station
C Centigrade
CD-ROM Compact Disk Read Only Memory
COM Common
CPU Central Processing Unit
DAS Distributed Antenna System
DC Direct Current
DHCP Dynamic Host Configuration Protocol
DNS Domain Name Service
DPEC DC Power Entry Card
EIA Electronic Industries Association
EMS Element Management System
ESD Electrostatic Discharge
F Fahrenheit
FBHDC Full Band Hub Down Converter
FCC Federal Communications Commission
FDA Food and Drug Administration
FSC Forward Simulcast Card
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2005, ADC Telecommunications, Inc.
ADCP-75-192 • Issue 1 • December 2005 • Preface
GUI Graphical User Interface
HCP Hardware Control Process
HLP High Level Process
HRM Hub Reference Module
HUC Hub Up Converter
IEL Injection/Extraction Locking
LED Light Emitting Diode
MHz Mega Hertz
MPE Maximum Permissible Exposure
NIPR/S Network IP Receiver/Sender
NMS Network Management System
NOC Network Operations Center
Node Any CPU in the Digivance CXD system
PA Power Amplifier
PC Personal Computer
PCS Personal Communications System
PDU Power Distribution Unit
PPS Pulse Per Second
RAN RAN, Tenant 1 – 3
RDC RAN Down Converter
RF Radio Frequency
RMA Return Material Authorization
RSC Reverse Simulcast Card
RUC RAN Up Converter (Dual)
RX Receive or Receiver
SIF Synchronous Interface (Fiber Interface also referred to as WBOT)
SMR Specialized Mobile Radio
STF System Interface
TX Transmit or Transmitter
UL Underwriters Laboratories
VAC Volts Alternating Current
VDC Volts Direct Current
VSWR Voltage Standing Wave Ratio
WECO Western Electric Company
WDM Wave Division Multiplexer
2005, ADC Telecommunications, Inc.
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ADCP-75-192 • Issue 1 • December 2005 • Preface
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Page xii
2005, ADC Telecommunications, Inc.
SECTION 1: OVERVIEW
Content Page
1 INTRODUCTION .................................................................... 1-1
DIGIVANCE CXD SYSTEM OVERVIEW ...................................................... 1-1
2
2.1 Basic Components ............................................................. 1-2
2.2 General Description ............................................................ 1-2
2.3 Local Service Interface.......................................................... 1-3
2.4 Remote NOC Interface .......................................................... 1-4
3 SYSTEM FUNCTIONS AND FEATURES...................................................... 1-4
3.1 Fiber Optic Transport ........................................................... 1-4
3.2 Control and Monitoring Software ................................................... 1-5
3.3 Fault Detection and Alarm Reporting................................................. 1-5
3.4 Powering ................................................................... 1-5
3.5 Equipment Mounting and Configuration ............................................... 1-8
3.6 Hub Subsystem Assemblies....................................................... 1-8
3.7 RAN Subsystem Assemblies ..................................................... 1-11
3.8 Communication Interfaces....................................................... 1-14
ADCP-75-192 • Issue 1• December 2005 • Section 1: Overview
1 INTRODUCTION
This section provides basic description, application, and configuration information about the
Digivance CXD. Throughout this publication, all items referenced as “accessory items” are
not furnished with the basic product and must be purchased separately.
2 DIGIVANCE CXD SYSTEM OVERVIEW
The Digivance CXD is an RF signal transport system that provides long-range RF coverage in
areas where it is impractical to place a Base Transceiver Station (BTS) at the antenna site.
Digivance CXD is a multi-frequency, multi-protocol distributed antenna system, providing
microcellular SMR, Cellular and PCS coverage via a distributed RF access system. High real
estate costs and community restrictions on tower and equipment locations often make it
difficult to install the BTS at the same location as the antenna. The Digivance CXD is
designed to overcome equipment placement problems by allowing base stations to be hubbed
at a central location while placing remote antennas at optimum locations with minimal real
estate requirements. The Digivance CXD Hub is connected via high speed datalinks to Radio
Access Nodes (RAN’s) distributed over a geographical area of interest. With the Digivance
CXD, RF signals can be transported to one or more remote locations to expand coverage into
areas not receiving service or to extend coverage into difficult to reach areas such as canyons,
tunnels, or underground roadways.
2005, ADC Telecommunications, Inc.
Page 1-1
ADCP-75-192 • Issue 1 • December 2005 • Section 1: Overview
2.1 Basic Components
Figure 1-1 illustrates a Digivance system with RAN’s distributed over a desired geographical
area, connected back to a Wireless Service Provider (WSP) base station(s) at a Hub locale. The
illustration shows a dual-band SMR A and SMR B configuration with variable digital
simulcasting as a reference. The Digivance CXD Hub equipment consists of a rack assembly
containing RF Chassis and Digital Chassis equipment, high power attenuators, base station
interface modules, power distribution unit, Ethernet hub, Hub Reference Module and other
material sufficient to provide the interconnection at the RF layer between the base station
electronics and the Digivance CXD RAN’s located in the field.
SMR A
BTS
SMR B
BTS
CXD
Hub
CXD
RAN 1
CXD
RAN 2
CXD
RAN 3
CXD
RAN 4
CXD
RAN 5
CXD
RAN 6
CXD
RAN 7
CXD
RAN 8
20799-A
SMRA/
SMRB
SMRA/
SMRB
SMRA/
SMRB
SMRA/
SMRB
SMRA/
SMRB
SMRA/
SMRB
SMRA/
SMRB
SMRA/
SMRB
2.2 General Description
The Hub is co-located with the BTS and interfaces directly with the BTS over coaxial cables.
In the forward path, the Full Band Hub Down Converter (FBHDC) receives RF signals from
the BTS and down converts the signals to IF. The Forward Simulcast Card (FSC) digitizes the
RF signals and passes digital IF (DIF) signals into the Sonet Interface (SIF) that converts them
to digital optical signals for transport to the RAN. At the RAN, another SIF card receives the
digital optical signal, passes DIF to the Remote Up Converter (RUC) and inputs signals into a
RF Assembly (RFA). The RF signals are duplexed and combined with other RF signals using a
combination of diplexers or triplexers and then fed into a multi-band antenna.
Page 1-2
2005, ADC Telecommunications, Inc.
Figure 1-1. Digivance CXD Architectural Summary Diagram
ADCP-75-192 • Issue 1• December 2005 • Section 1: Overview
In the reverse path, the antenna receives RF signals from a mobile and sends those signals into
the RFA which contains a diplexer and Low Noise Amplifier. The output of the RFA is
connected the RAN Down Converter (RDC) which down converts the RF back to IF and
digitizes the signals. The DIF signals are passed to the SIF, which sends digital optical signals
from the RAN to the HUB SIF. The Hub SIF combines with DIF signals from the other RAN’s
that are in that simulcast cluster through the Reverse Simulcast Card (RSC). The Hub Up
Converter (HUC) takes the RSC output and translates the digital optical signals back to RF
signals for transmission to the BTS.
Figure 1-2 shows the RF signal path through the Digivance CXD system. In the forward
direction, the signal starts from the base station sector on the left and moves to the right. In the
reverse direction, the RF path starts at the antenna and then flows from the RAN to the Hub
and to the base station sector receiver(s).
CXD Hub CXD RAN
800 MHz
BTS
900 MHz
BTS
HDC FSC
HUC RSC
HDC FSC
HUC RSC
STF
CPU
Figure 1-2. Digivance CXD Block Diagram
SIF SIF
RDC
RUC
RDC
STF
CPU
RFA
800/
900
20800-A
800/900
DUPLEXED
OUTPUT
2.3 Local Service Interface
Local communications with the Digivance CXD system is supported through an IP interface
capability. The Hub Digital Chassis and RAN Chassis both contain CPU modules with
Ethernet ports that act as nodes in an Ethernet-based network similar to that of a computer
local area network (LAN). Each RAN in the Digivance network contains one CPU, while the
Hub contains multiple CPUs within the Digital Chassis units depending on the number of
tenant sectors supported in the system. A local user is able to gain access to the CXD network
by the DHCP server resident on the Hubmaster CPU.
2005, ADC Telecommunications, Inc.
Page 1-3
ADCP-75-192 • Issue 1 • December 2005 • Section 1: Overview
The Digivance CXD Element Management System is a Web based system that provides the
various control and monitoring functions required for local management of each CXD system.
The user interface into the EMS is a PC-type laptop computer loaded with a standard Web
browser. The EMS is resident on the Hubmaster CPU and is accessible through an Ethernet
connection. Operation is effected through the EMS Graphical User Interface (GUI). The GUI
consists of a series of screens from which the user selects the desired option or function.
Ethernet ports are available at the Hub and RAN CPU for connecting the EMS computer at
either location.
For management and operation by a customer supplied Network Management Systems (NMS)
the Digivance CXD has imbedded in software a Simple Network Management Protocol
(SNMP) Agent and ADC Management Information Bases (MIB’s). Local communications
with the Digivance CXD SNMP Agent system is supported through the IP interface at the Hub
or RAN. All CPUs in the Digivance network support SNMP to provide NMS monitoring and
control access to the Digivance system. The NMS sends SNMP SET and GET messages to the
various nodes in the Digivance CXD network to access MIB’s which define the interface to the
Digivance system.
2.4 Remote NOC Interface
Remote communications between a Network Operations Center (NOC) and a networked
grouping of Digivance systems is supported by the Digivance CXD SNMP Agent. The primary
component of the remote NOC interface is a PC-type desktop computer loaded with a
customer supplied Network Management System (NMS). A NMS operating at a customer
NOC is able to discover and manage multiple Hub and RAN sites independently or as a
distributed network.
3 SYSTEM FUNCTIONS AND FEATURES
This section describes various system level functions and features of the Digivance CXD.
3.1 Fiber Optic Transport
The optical signal of a Digivance CXD is digital. The input and output RF signal levels at the
Hub SIF or the RAN SIF are not dependent on the level of the optical signal or the length of
the optical fiber. The maximum length of the optical fibers is dependent on the loss
specifications of the optical fiber and the losses imposed by the various connectors and splices.
The system provides an optical budget of 9 dB (typical) when used with 9/125 single-mode
fiber, or 26 dB with extended optics.
The optical wavelengths used in the system are 1310 nm for the forward path and 1310 nm for
the reverse path. Different wavelengths may be used for the forward and reverse paths
allowing for a pair of bi-directional wavelength division multiplexers (WDM) or coarse
wavelength division multiplexing (CWDM) to be used in applications where it is desirable to
combine the forward path and reverse path optical signals on a single optical fiber. One WDM
or CWDM multiplexer/demultiplxer module may be mounted with the Hub and the other
mounted with the RAN. The WDM or CWDM passive multiplexers are available as accessory
items.
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3.2 Control and Monitoring Software
The Digivance CXD EMS or customer supplied NMS using the Digivance CXD/NXD SNMP
Agent is used to provision and configure the system for operation. This includes initializing the
system, setting up the Hub and RAN element identification schemes, tenant processing, setting
alarm thresholds, and setting forward and reverse path RF gain adjustments. The EMS or NMS
software is also used to get alarm messages (individual or summary), data measurements, or to
upgrade the Hub/RAN system software. All control and monitor functions can be effected
using either the EMS or through a NMS.
3.3 Fault Detection and Alarm Reporting
LED indicators are provided on each of the respective modules populating the Hub Digital
Chassis, RF Chassis and RAN Chassis to indicate if the system is normal or if a fault is
detected. In addition, a dry contact alarm interface can be provided as an accessory item that is
managed by the EMS software with normally open and normally closed alarm contacts for
connection to a customer-provided external alarm system. All Hub and RAN alarms can be
accessed through the SNMP manager or the EMS software GUI.
ADCP-75-192 • Issue 1• December 2005 • Section 1: Overview
3.4 Powering
The Hub Digital and RF Chassis are powered by -48 Vdc and must be hard-wired to a local
office battery power source through a fuse panel. The power consumption of the system will
depend on the configuration of the system and how the Digital Chassis and RF Chassis are
populated.
Table 1-1 lists the typical power consumption of the respective modules for the Digital
Chassis.
Table 1-1. Digital Chassis Power Consumption
MODULE POWER
Digital Chassis 76.0 Watts
CPU 20.5 Watts
STF2 3.5 Watts
SIF 15.5 Watts
RSC 9.0 Watts
For a standard configuration of 4:1 simulcasting, Table 1-2 lists the estimated power
consumption for the Digital Chassis
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Table 1-2. Digital Chassis 4:1 Simulcast Power Consumption
MODULE # OF MODULES POWER
Digital Chassis 1 76.0 Watts
CPU 1 20.5 Watts
STF2 1 3.5 Watts
SIF 4 15.5 Watts
RSC 1 9.0 Watts
Total Power 170 Watts
Table 1-3 lists the typical power consumption of the respective modules for the RF Chassis.
Table 1-3. Digital Chassis Power Consumption
MODULE POWER
RF Chassis 55.0 Watts
FBHDC 11.0 Watts
HUC 8.0 Watts
FSC 13.5 Watts
For a single-band configuration, Table 1-4 lists the estimated power consumption for the RF
Chassis
Table 1-4. RF Chassis Single-band Power Consumption
MODULE # OF MODULES POWER
RF Chassis 1 55.0 Watts
FBHDC 1 11.0 Watts
HUC 1 8.0 Watts
FSC 1 13.5 Watts
Total Power 87.5 Watts
For a dual-band configuration Table 1-5 lists the estimated power consumption for the RF
Chassis
Table 1-5. RF Chassis Single-band Power Consumption
MODULE # OF MODULES POWER
RF Chassis 1 55.0 Watts
FBHDC 2 11.0 Watts
HUC 2 8.0 Watts
FSC 2 13.5 Watts
Total Power 120.0 Watts
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ADCP-75-192 • Issue 1• December 2005 • Section 1: Overview
The RAN is powered by 120 or 240 Vac (50 or 60 Hz) and must be hard-wired to the AC
power source through a breaker box. The RAN is pre-wired for 120 VAC operation but can
be converted to 240 VAC operation if required. On an optional basis, a back-up battery kit is
available for the RAN. The battery-backup system powers the RAN if the AC power source is
disconnected or fails.
3.4.1 HUB Power On/Off
Power to the Hub rack is provided using a power system supplied by the customer located in
the Hub shelter. Power to the Hub must be supplied through a fuse panel such as the 20
position ADC PowerWorx power distribution panel (available separately). The power circuit
for each active element of the system must be protected with a 5 Amp GMT fuse.
Hub Power On
• Power to the Hub racks is enabled at the power system supplied by the customer
Hub Power Off
• Power to the Hub racks is disabled at the power system supplied by the customer
Hub CompactPCI Chassis (RF & Digital) Power On
• Identify the power supply module(s) for the chassis to be powered on
• Insert the power supply module(s) in the chassis
Hub CompactPCI Chassis (RF & Digital) Power Off
• Identify the power supply module(s) for the chassis to be powered off
• Extract the power supply module(s) from the chassis
3.4.2 RAN Power on/off (APEC)
RAN Equipment Power On
• Plug the AC line cord into the receptacle located between the cPCI power supplies
• Turn power on at the customer supplied load center located on the utility pole
RAN Equipment Power Off (APEC)
• Turn the circuit breaker off at the customer supplied load center located on the utility
pole
• Unplug the AC line cord from the receptacle located between the cPCI power supplies
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3.4.3 RAN Power on/off (DPEC)
RAN Equipment Power On
• Plug the AC line cord into the receptacle located on all RFA’s
• Turn power on at the customer supplied load center located on the utility pole
RAN Equipment Power Off (APEC)
• Turn the circuit breaker off at the customer supplied load center located on the utility
pole
• Push battery disconnect switch (DISCON) on DPEC front panel
• Wait for all DPEC LEDs to go out
• Unplug the AC line cord from the receptacle located between the cPCI power supplies
3.5 Equipment Mounting and Configuration
The Digital Chassis and RF Chassis are designed for mounting in a non-condensing indoor
environment such as inside a wiring closet or within an environmentally-controlled cabinet.
The Hub equipment is intended for rack-mount applications and may be mounted in either a
19- or 23-inch WECO or EIA equipment rack, usually within 20 feet of the BTS. The RAN is
designed for mounting in either an indoor or outdoor environment.
3.6 HUB Subsystem Assemblies
The Hub is comprised of a single rack assembly with two chassis types. The Hub rack houses
the following modules:
1. The Digital Chassis houses the following modules:
• CPU (Hubmaster or Slave)
• System Interface card (STF2)
• Sonet Interface (SIF)
• Reverse Simulcast card (RSC)
• CompactPCI Power Supply (CPS)
• Fan assembly
2. The RF Chassis houses the following modules:
• Full Band Hub Down Converter card (FBHDC)
• Hub Up Converter card (HUC)
• Forward Simulcast card (FSC)
• CompactPCI Power Supply (cPCI P/S)
• Fan assembly
3. Attenuator Rack which houses up to twelve (12) attenuators.
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ADCP-75-192 • Issue 1• December 2005 • Section 1: Overview
4. Base Station Interface Module (BIM). The BIM is a multi-port transition module used to
interface with the Tenant’s base station sector. The BIM accepts either duplexed or nonduplexed RF from the base station sector and provides the Digivance CXD-Hub RF
section separate transmit and receive paths.
5. Ethernet hub with twenty four (24) ports.
6. -48 VDC Power Distribution Unit.
7. Hub Reference Module (HRM).
The Attenuator Rack, BIM, Ethernet Hub and HRM are sold as accessory items. The
functionality of each of these card assemblies is defined in the following sections.
3.6.1 Digital CompactPCI Chassis & Backplane
The CompactPCI Digital Chassis houses cooling fans, the CPU, System Interface (STF2)
module, Sonet Interface (SIF) module, Reverse Simulcast Card (RSC), and power supplies.
The backplane provides the distribution for clock, communication, control data and timing.
3.6.2 RF CompactPCI Chassis & Backplane
The CompactPCI RF Chassis houses the cooling fans, RF transceiver modules, Hub Up
Converter (HUC), Hub Down Converter (FBHDC), Forward Simulcast card (FSC) and the
power supplies. The backplane provides the distribution for clock, communication and control
data and timing. RF and digital RF signals are interconnected between modules using the
appropriate cabling.
3.6.3 Central Processing Unit (CPU)
The Hub CPU is a cPCI single board computer with hot swap capabilities. The Operating
System of the Digivance CXD uses LINUX. There is one CPU per digital chassis. A Hub CPU
performs the following functions:
1. Manages a subset of Hub hardware including RF and Digital equipment.
2. Manages RANs connected to its Hub managed hardware.
One of the Hub CPUs must be configured as the Hubmaster processor. In addition to its regular
Hub CPU duties it is responsible for:
1. Reporting Tenant status.
2. Controlling all Tenant specific functions.
3. Synchronizing the date for all attached nodes.
4. Managing gain & delays.
5. Monitoring signal presence and quality.
6. Managing network services such as DHCP and DNS.
7. EMS.
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3.6.4 System Interface (STF2)
The System Interface (STF2) module, using four I2C busses, provides the ability to
communicate between the CPU and other modules. The STF2 also communicates with the
GPS modules found both in the Master Hub Reference Module and internal to the RAN STF2.
In the HUB, the STF2 communicates with chassis fans for monitoring purposes.
The four I2C busses are accessible via the CompactPCI backplane or via front panel
connectors.
3.6.5 Sonet Interface (SIF)
The Sonet Interface module provides the fiber interface between the Hub and RAN’s. This
interface includes:
1. Digitized RF Signal information.
2. 10BaseT Ethernet for command and control between Hub and the RAN’s.
3. Measures fiber delay used in Delay Management.
3.6.6 Full Band Hub Down Converter (FBHDC)
The Full Band Hub Down Converter (FBHDC) down converts the forward RF carrier to an
intermediate frequency (IF) that is then digitized by the Forward Simulcast Card (FSC). Each
FBHDC can support up to 15 MHz of contiguous spectrum.
3.6.7 Forward Simulcast Card (FSC)
The FSC converts the IF signals from the FBHDC to Digitized IF (DIF) format. There are
eight (8) separate analog-to-digital conversion circuits on one (1) FSC.
3.6.8 Reverse Simulcast Card (RSC)
The RSC sums the Digital IF (DIF) from up to four (4) RANs into DIF signals that are sent to
the appropriate HUC for up conversion to RF. Single and dual-branch diversity are supported.
3.6.9 Hub Up Converter (HUC)
The HUC accepts two (2) Digital IF (DIF) signals from a SIF or RSC. The two (2) DIF signals
are converted from digital-to-analog and provided as two (2) separate RF signals (primary and
diversity) to the BIM and BTS.
3.6.10 Base Station Interface Module (BIM)
The BIM provides the following BTS interface functions:
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1. Interface to a low power forward BTS RF path.
2. Handles duplexed and non-duplexed signals.
3. Gain adjust for optional reverse path configurations.
The BIM is controlled via an I2C connection from its respective CPU.
3.6.11 Hub Reference Module (HRM)
The HRM generates the RF reference and fiber clocking for distribution within the Hub. In
addition, it contains a GPS that generates a 1 PPS (one pulse per second) for distribution to the
Digital Chassis modules for delay management.
3.6.12 Ethernet Hub
Each Hub rack is equipped with a 24 port Ethernet Hub. It is powered by 120 VAC, or optional
–48 VDC can be chosen. The Ethernet Hub is used to connect RAN CPUs (through Hub SIFs)
and Hub CPUs to and existing LAN/WAN and to each other.
3.7 RAN Subsystem Assemblies
The RAN consists of a cabinet, RAN Chassis and Backplane, a Central Processing Unit
(CPU), a System Interface (STF2), a Sonet Interface (SIF), RAN Down Converter (RDC or
RDC2), RAN Up Converter (RUC2.X or RUC3), AC Power Entry Card (APEC) or DC Power
Entry Card (DPEC); and the RF Assembly consisting of Power Amplifiers, duplexers, and
RFA interface controller. There are two cabinet options: the Standard CXD RAN Cabinet and
the Extended CXD RAN Cabinet. The standard cabinet supports two Radio Frequency
Assemblies (RFA) with no battery backup; or one RFA and one internal battery backup
assembly. The extended cabinet supports two RFA's and an extended battery backup assembly
housed in a battery compartment located on the side of the cabinet.
The Digivance CXD cabinet houses the RAN components and can be mounted from a flatvertical surface or from a utility pole using an accessory pole-mount kit. Within the enclosure
space is provided for storing short lengths of excess fiber slack.
3.7.1 Central Processing Unit (CPU)
The RAN has a cPCI based single-board computer with a Central Processing Unit (CPU)
operating LINUX. The RAN CPU provides the following functions:
1. Manages all RAN hardware including RF and Digital equipment
2. Manages gain & delays
3. Monitors signal presence and quality
4. Ethernet interconnect
5. Generates SNMP traps based upon fault conditions
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3.7.2 System Interface (STF2)
The STF2 module provides the ability to communicate between the CPU and other modules
(RDC, RUC, RFA interface controller) using four I2C busses. The STF2 also contains the GPS
module.
3.7.3 Sonet Interface (SIF)
The SIF module provides the optical interface between the Hub and RAN’s. The SIF has an
optical transceiver module installed that provides the optical transmit and receive functions.
The SIF has also the following functions:
1. Digitized RF Signal information.
2. 10 BaseT Ethernet for command and control between Hub and the RANs.
3.7.4 Small Form-Factor Pluggable (SFP) Optical Transceiver
The Small Form-factor Pluggable (SFP) optical transceiver module provides the optical
interface between the Hub equipment and the RAN hardware. The SFP has a laser transmitter
and optical receive detector. The Digivance CXD uses industry standard SFP optics which
offers a number of configuration options depending on the requirements of the project. The
SFP modules are available separately and may or may not be initially installed in the SIF
depending on the configuration ordered.
3.7.5 RAN Down Converter (RDC or RDC2)
The RDC is a dual-diversity wideband receiver that converts PCS, Cellular, SMR A and SMR
B signals to digitized IF. It also includes a CW test tone used in reverse continuity testing.
3.7.6 RAN Up Converter (RUC2.X or RUC3)
The RUC converts digitized IF into PCS, Cellular and SMR frequency bands. Each RUC
supports two simultaneous bands via wideband outputs. The RUC also provides clocking for
its neighboring RDC’s as well as extends an I2C interface to its respective RFA.
3.7.7 RAN Chassis & Backplane
The RAN chassis is a six slot CompactPCI unit. The backplane supports the basic CompactPCI
functions and has been extended to allow the routing of DIF, reference clocks and I2C signals
between CompactPCI modules.
3.7.8 AC Power Entry Card (APEC)
The APEC distributes AC power to the cPCI power supplies in the RAN. Its input range is
100 to 240 VAC. It has a built in EMI filter and fuse holder and provides an access point for
fan monitoring and control.
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ADCP-75-192 • Issue 1• December 2005 • Section 1: Overview
3.7.9 DC Power Entry Card (DPEC)
The DPEC is used to distribute DC power to the cPCI power supplies in the RAN when
supporting battery backup. It has a built in EMI filter and fuse holder and provides an access
point for fan monitoring and control.
3.7.10 CompactPCI RAN Power Supply (cPCI P/S)
The CompactPCI (cPCI) Power Supplies provide +/-12V, 5V and 3.3 V DC power to the cPCI
backplane for use by the RAN modules. These units are hot swappable and supports redundant
supply configurations.
3.7.11 RF Assembly
The RF Assembly (RFA) consists of the power amplifier (PA), power supply, fans, duplexers
and RFA interface controller. RF assemblies are PCS, Cellular and SMR 800/900 bands.
3.7.12 Internal Battery backup (BAT1) 1-Hour
The Digivance CXD has an option for an internal battery back-up located inside the Standard
CXD RAN cabinet. It is positioned in the space of a RFA and is used to provide short duration
power backup to the RAN. A cabinet using the internal battery backup option can only support
one single- or dual-band RFA.
3.7.13 Extended Internal Battery Backup (BAT2) 2-Hour
The Digivance CXD has an option for an extended internal battery back-up through use of the
Extended CXD RAN Cabinet with a separate compartment for the batteries. A cabinet using
the extended backup option can support two single- or dual-RFA’s and can provide up to two
hours of battery backup time.
3.7.14 Antenna (ANT)
The Digivance CXD RAN may be deployed and installed on a power distribution pole, on a
building wall, on a water tank, or on a rooftop, or within a building environment. ADC can
supply a number of antenna options for the Digivance CXD as accessory items. Antenna(s)
may be mounted on a facade, supporting member, wall or rooftop pedestal mount. Installations
may use conventional omni-directional or directional antenna, in either a sector or quasi-omni
antenna configuration, depending on the site’s coverage objective and design. When designing
a network, the azimuth and elevation beamwidths would be selected by the RF designer to
support the desired coverage objectives. Proper antenna selection and the mounting installation
is the responsibility of the customer.
When using a customer supplied antenna, they should meet or exceed the following antenna
specifications:
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• VSWR (all bands): 1.5:1 typ, 1.65:1 max
• Maximum power input: 200W (average) 1000W (peak)
• Passive Intermodulation Distortion: -153dBc (maximum)
3.8 Communication Interfaces
3.8.1 I2C
I2C is a bi-directional serial bus that provides a simple, efficient method of data exchange
between devices. It is used for the board level communications protocol.
I2C interfaces are used for communication to the following modules:
1. HUB - FBHDC, FSC, HUC, BIM, and HRM.
2. RAN - RDC, RUC, and RFA.
3.8.2 Network Interface
The Hubmaster CPU is able to communicate to any other CPU in the Digivance CXD system
(Hub and RAN) over an Ethernet LAN using the IP based Simple Network Management
Protocol (SNMP). Ethernet connections are aggregated with each rack via an Ethernet Hub.
Inter-rack communication is done by connecting the Ethernet Hubs between racks.
Each SIF has a 10BaseT Ethernet connection. The Hubmaster CPUs are able to communicate
with the RAN’s over this Ethernet connection.
3.8.3 SNMP
The ADC Digivance Simple Network Management Protocol (SNMP) Agent and the ADC
Management Information Bases (MIB’s) provide the interface into the Digivance CXD system.
A MIB is a database where scalar or tabular data “objects” known to both agent and the
manager are defined and stored. The MIB’s define a set of parameters with specific
characteristics, including name, data type, value range, description, and read-write
accessibility. An SNMP manager sends SNMP SET and GET messages to the various nodes in
the Digivance CXD network in order to access MIB’s.
The MIBs are compiled into a SNMP Manager as well as the Digivance CXD SNMP Agent so
that both manager and agent software can communicate. Agent and manager each have their
own copy of the MIB. Using the SNMP interface, the manager issues GET and SET
commands for object attributes stored in the agent MIB. In addition, the manager receives
unsolicited object attributes in the form of TRAP notices sent by the agent. The Digivance
software has the ability to send SNMP TRAPS when certain MIB conditions are detected.
reducing the amount of polling via SNMP GET requests from the SNMP manager.
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SECTION 2: DESCRIPTION
Content Page
1 INTRODUCTION .................................................................... 2-1
2 DIGITAL CHASSIS ................................................................... 2-2
3 RF CHASSIS....................................................................... 2-5
4 RADIO ACCESS NODE (RAN) ........................................................... 2-9
4.1 RAN cabinet ................................................................ 2-10
5 ELEMENTS COMMON TO HUB AND RAN ................................................... 2-11
5.1 Central Processor Unit (CPU) .................................................... 2-11
5.2 System Interface (STF2) ....................................................... 2-13
5.3 Sonet Interface (SIF) ......................................................... 2-15
5.4 Small Form-Factor Optical Transceiver (SFP) ......................................... 2-16
6 HUB SPECIFIC MODULES ............................................................. 2-17
6.1 Full Band Hub Down Converter (FBHDC) ............................................ 2-17
6.2 Forward Simulcast Card (FSC) ................................................... 2-18
6.3 Hub Upconverter Card (HUC) .................................................... 2-19
6.4 Reverse Simulcast Card (RSC) ................................................... 2-20
6.5 Hub Reference Module (HRM) ................................................... 2-22
6.6 Ethernet Hub................................................................ 2-24
6.7 BTS Interface Module (BIM) .................................................... 2-25
6.8 Attenuator Shelf ............................................................. 2-28
7 RADIO ACCESS NODE (RAN) SPECIFIC MODULES ............................................. 2-29
7.1 Ran Down Converter (RDC or RDC2) ............................................... 2-29
7.2 Ran Up Converter (RUC2.X or RUC3) ............................................... 2-30
7.3 AC Power Entry Controller (APEC).................................................. 2-31
7.4 DC Power Entry Controller (DPEC) ................................................ 2-32
7.5 CompactPCI Power Supply (cPCI P/S) .............................................. 2-34
7.6 RF Assembly Module (RFA) ..................................................... 2-35
7.7 Specifications ............................................................... 2-41
ADCP-75-192 • Issue 1 • December 2005 • Section 2: Description
1 INTRODUCTION
This section describes the basic components of the Digivance CXD system including the Hub
and Radio Access Node (RAN) equipment. The Hub equipment consists of the Central
Processing Unit (CPU), the System Interface (STF2), the Sonet Interface (SIF), the Full Band
Hub Down Converter (FBHDC), the Hub Up Converter (HUC), the Forward Simulcast Card
(FSC), Reverse Simulcast Card (RSC) and CompactPCI Power Supplies (cPCI P/S).
Additional hardware includes the Base Station Interface Module (BIM), Hub Reference
Module (HRM), a commercial Ethernet Hub and high power RF attenuators.
The RAN is an assembly that consists of the RAN equipment including the RAN Chassis,
CPU, STF2, RAN Down Converter (RDC or RDC2), RAN Up Converter (RUC2.X or RUC3),
AC Power Entry Controller (APEC), DC Power Entry Controller (DPEC), cPCI P/S and RF
Assembly (RFA).
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ADCP-75-192 • Issue 1 • December 2005 • Section 2: Description
2 DIGITAL CHASSIS
The Digivance Digital Chassis is a rack-mounted cPCI shelf capable of housing 8 industry
standard cPCI circuit card modules. The Digital Chassis houses cooling fans and specific
modules designed for use in the Digivance CXD system. The backplane of the Digital Chassis
provides for distribution of signals between modules including the reference clock,
communications, control and data signals. Modules used in the Digital Chassis include the
CPU module, System Interface module (STF2), and up to six Reverse Simulcast Cards (RSCs)
or Sonet Interface (SIF) digital modules.
Figure 2-1 shows the empty Digital Chassis. The eight empty slots on the left are used for
Digivance CXD Hub modules. The slots on the right are used for housing the cPCI power
supplies and cPCI fan assembly.
Modules and circuit cards are placed into the Digital Chassis and are mated to standard cPCI
connectors on the backplane of the chassis. Data and signals are transported over busses on the
backplane of the chassis to other modules and ports on the backside of the chassis.
Rear connections are made to the Digital Chassis to connect power, route DIF signals to inputs
and outputs of respective modules mounted in the chassis, connect the I2C bus to the chassis,
input a 1 Hz reference signal, input a sample clock, input FAN tachometer readings from the
RF Chassis, and distribute 12 VDC to other elements of the system. The Digital Chassis also
has a Module/Port status indicator that can be used to trace signals through the system and
show activity on the ports. Figure 2-2 shows the back panel connections for the Digital
Chassis. The references for the back connectors of the Digital Chassis are shown in Table 2-1.
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2005, ADC Telecommunications, Inc.
Figure 2-1. Digivance CXD Digital Chassis
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