Digivance® LRCS System
Rear Access Host Unit
Installation and Maintenance Manual
ADCP-75-169
Issue 1
June 2004
19717-A
1284820 Rev A
ADCP-75-169 • Issue 1 • June 2004 • Preface
COPYRIGHT
© 2004, ADC Telecommunications, Inc.
All Rights Reserved
Printed in the U.S.A.
REVISION HISTORY
ISSUE DATE REASON FOR CHANGE
1 06/2004 Original release.
LIST OF CHANGES
The technical changes incorporat ed into this issue are lis ted below.
PAGE IDENTIFIER DESCRIPTION OF CHANGE
All Original release
TRADEMARK INFORMATION
ADC, Digi vance, PowerWorx, and FiberGuide are registered trademarks of A D C 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 an y and all liability for indirec t, incidental, special, consequen tial or other similar dam ages. This discl aimer of
liability applies to all products, publications and services during and after the warranty period.
This publ ication may be verified at any time by contacting ADC’s Technical Assistance Cent er at 1-800-366-3891, ex tension 73475
(in U.S. A . or Canada) or 952-9 17-3475 (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) 917-1717
TABLE OF CONTENTS
Content Page
ABOUT THIS MANUAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
Related Publications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
ADMONISHMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
GENERAL SAFETY PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .vi
STANDARDS CERTIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vi
LIST OF ACRONYMS AND ABBREVIATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vi
1 INTRODUCTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2 HOST UNIT DESCRIPTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2.1 Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2.2 RF Signal Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2.3 Optical Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2.4 Controller Area Network Interface Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2.5 Service Interface Connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2.6 Powering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2.7 User Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
3 HOST UNIT ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.1 Interface Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.2 Wavelength Division Multiplexer System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.3 Coarse Wavelength Division Multiplexer System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4 INSTALLATION PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4.1 Before Starting Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4.2 Unpacking and Inspection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.3 OSP Fiber Cable Installation Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.4 HU Mounting Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.5 Chassis Ground Connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.6 Coaxial Cable Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.7 WDM Mounting Procedure (Accessory). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.8 Optical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.9 Controller Area Network Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.10 EMS Computer Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.11 External Alarm System Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.12 DC Power Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.13 Installation Complete. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5 MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5.1 Host Unit Fan Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
6 CUSTOMER INFORMATION AND ASSISTANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
ADCP-75-169 • Issue 1 • June 2004 • Preface
© 2004, ADC Telecommunications , Inc.
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ADCP-75-169 • Issue 1 • June 2004 • Preface
TABLE OF CONTENTS
Content Page
Blank
Page iv
© 2004, ADC Telecommunications , Inc.
ABOUT THIS MANUAL
This publication pro vides a basic descripti on of the Digi v ance LRCS rear access Host Unit (HU)
plus the installation and maintenance procedures. Also described are various accessories that
may be used with the HU. An overview of the Digivance System, a complete description of the
system components, the system turn-up and test procedures, and the system troubleshooting
procedures are provided in the applicable Digivance System Operation and Maintenance
Manual (see Related Publications section). The rear access HU is installed in conjunction with
the Digivance Remote Unit.
RELATED PUBLICATIONS
Listed below are related manuals and their publication numbers. Copies of these publications
can be ordered by contacti ng the ADC T e chnical Assi stance Center at 1-800-366- 389, ext ension
73475 (in U.S.A. or Canada) or 1-952-917-3475 (outside U.S.A. and Canada).
Title ADCP Number
ADCP-75-169 • Issue 1 • June 2004 • Preface
Digiv ance LRCS SMR System with Version 3.01 EMS Software Operat ion
and Maintenance Manual 75-170
Digiv ance LRCS SMR Interface Panels User Manual 75-143
Digiv ance Coarse Wavelength Di vision Multiplex er User Manual 75-142
Digiv ance LRCS Dual-STM Systems Supplemental Manual 75-157
ADMONISHMENTS
Important safety admonishments are used thr oughout 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 s evere 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.
© 2004, ADC Telecommunications , Inc.
Page v
ADCP-75-169 • Issue A • June 2001 • Preface
GENERAL SAFETY PRECAUTIONS
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 loca tion or during a lightning storm.
STANDARDS CERTIFICATION
FCC: This equipment complies with the appl icable sections of Title 47 CFR Part 90 (SMR).
UL/CUL: This equipment complies with UL and CUL 50 Standard for Enclosures for
Electrical Equipment. This equipment provides the degree of protection specified by IP43 as
defined in IEC Publication 529.
FDA/CDRH: This equipment uses a Class 1 LASER according to FDA/CDRH Rules. This
product conforms to all appli cable standards of 21 CFR Part 1040.
IC: This equipment complies with the applic able secti ons of RSS-131. The term “IC:” be fore the
radio ce rtif i cat io n number onl y signi f ie s th at Indu str y Cana da Techn ica l Spe cif i cat io ns were met.
LIST OF ACRONYMS AND ABBREVIATIONS
The acronyms and abbreviations used in this manual are detailed in the following list:
AWG American Wire Gauge
C Centigrade
CAN Controller Area Network
CDRH Center for Devic es and Radiological Health
CUL Canadian Underwriters La boratories
CWDM Coarse Wavelength Division Multiplexer
DC Direct Curren t
DCE Data Communications Equipment
DIV Diversity
DTE Data Terminal Equipment
EBTS Enhanced Base Transceiver Station
EIA Electronic Industries Association
EMS Element Management System
ESD Electrostatic Dischar ge
F Fahrenheit
FCC Federal Communications Commission
FDA Food and Drug Administration
FWD Forward
HU Host Unit
IC Industry Canada
Page vi
© 2004, ADC Telecommunications , Inc.
ADCP-75-169 • Issue 1 • June 2004 • Preface
LED Light Emitting Diode
LPA Linear Power Amplifier
LRCS Long-Range Cov erage Solution
MHz Mega Hertz
MPE Maximum Permissible Exposure
MTBF Mean Time Between Failure
NEM Network Element Manager
NEMA National Electrical Manufacturers Association
NO Normally Open
NOC Network Operations Cente r
OSP Outsid e Plan t
PA Power Amplifier
REV Reverse
RF Radio Frequency
RMA Return Material Authorization
RU Remote U n it
SMR Specialized Mobile Radio
STM Spectrum Transport Module
UL Underwriters Laboratories
VDC Volts Direct Current
VSWR Voltage Standing Wave Ratio
WECO Western Electric Company
WDM Wave Divis i on Multiplexe r
© 2004, ADC Telecommunications , Inc.
Page vii
ADCP-75-169 • Issue A • June 2001 • Preface
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Page viii
© 2004, ADC Telecommunications , Inc.
1 INTRODUCTION
The rear access Host Unit serves as the EBTS servicing unit for the Digivance LRCS system. A
typical LRCS system consists of a Host Unit (HU) and a R emote Unit (RU). The HU consists of
an electro nic chassis as sembly that m ounts in a st andard equipm ent rack. Th e RU consists of
multiple electronic and optical modules that mount in either an outdoor cabinet or an indoor
mounting shelf. The HU and the RU together comp rise an L RCS system. Various ac cessory
items are also available for use with the basic L RC S s ystem. All items refe renced as “accessory
items” are not furnished with the basi c system and must be purchased separately.
2 HOST UNIT DESCRIPTION
The HU, shown in Figure 1, consists of an electronic circuit board assembly and a fan assembly
that are m oun t ed within a powd er-pai n t co at ed s heet metal en cl os u re. Th e en cl osur e p ro vides a
mounting point for the circuit board and fan assemblies and controls RF emissions. The only
user-replaceable component is the fan assembly. The HU is designed for use within a noncondensing indoor environment such as inside a wiring closet or cabinet. The RF connectors,
optical connectors, alarm output connectors, DC power terminal strip, and grounding lug are
mounted on the HU rear side. The On/Off power switch, LED indicators, service interface
connector , and Contr oller Area Networ k (CAN) connectors are mounted on the HU front panel.
ADCP-75-169 • Issue 1 • June 2004
2.1 Mounting
The HU is intended for rack-mount applications. A pair of reversible mounting brackets is
provided that allow the HU to be mounted in either a 19-inch or 23-inch EIA or WECO
equipment rack. When installed, the front panel of the HU is flush with the front of the rack.
Screws are provided for securing the HU to the equipment rack.
3.5 INCHES
(88 mm)
12.2 INCHES
(311 mm)
17.1 INCHES
(433 mm)
Figure 1. Host Unit
FRONT PANEL
MOUNTING
BRACKET
(BOTH SIDES)
17857-A
© 2004, ADC Telecommunications , Inc.
Page 1
ADCP-75-169 • Issue 1 • June 2004
2.2 RF Signal Connections
The RF signal connections between the HU and the EBTS are supported through either two
(non-diversity unit) or three (diversity unit) N-type female connectors. On non-diversity units,
one connector is used for the forward path RF signal. The other connector is used for the reverse
path RF signal. On diversity units, a third connector is used for the diversity path RF signal. In
installations where multiple EBTS’s will be connected to a single HU, it will usually be
necessary to install a Primary Interface Panel and an Expansion Panel (accessory items) to
support the interface between the HU and the EBTS. The HU should be as close as possible to
the EBTS to mini mize cab le losses.
2.3 Optical Connection
Optical connections between the HU and the RU (STM) are supported through either two (nondiversity unit) or three (diversity unit) SC-type optical connector ports. On non-diversity units,
one port is used for connecting the forward path optical signal and the other port is used for
connecting the primary reverse path optical signal. On diversity units, a third optical port is used
for connecting the di versity reverse path optical signal.
2.4 Controller Area Network Interface Connection
Controller Area Network (CAN) interface connections between multiple HU’s are supported by
a pair of RJ-45 jacks. One of the jacks is designated as the network IN port and the other jack is
designated as the network OUT port. The CAN interface allows up to 24 HU’s to be connected
together (in daisy- chain fashion) and controlled through a single EMS computer.
2.5 Service Interface Connection
The service interface connection between the HU and the EMS computer is supported by a
single DB-9 female conne ctor. The ser vice connector provides an RS-232 DTE inte rface. When
multiple HU’s are networked together, the supporting EMS computer may be connected to the
service connector of any one of the networked HU’s.
2.6 Powering
The HU is powered by ± 21 to ± 60 VDC power (nominal ± 24 or ± 48 VDC). The power is fed to
the HU through a screw-down type terminal strip located on the rear side of the unit. Power to
the HU must be supplied through a fuse panel such as the PowerWorx 20-position GMT fuse
panel (available separately). The power circuit for each HU must be protected with a 3 Amp
GMT fuse. An On/Off switch is provided on the HU front panel.
2.7 User Interface
The HU user interface consi sts of the v arious connectors, switches, termi nals, and LEDs that are
provided on the HU front a nd rear panels. The HU user interface points are indicated in Figure 2
and described in Table 1.
Page 2
© 2004, ADC Telecommunications , Inc.
ADCP-75-169 • Issue 1 • June 2004
FRONT VIEW
(12) REVERSE 1
RF OUT
(1) DC POWER
ON/OFF SWITCH
(13) REVERSE 2
RF OUT
(REFERENCE
ITEMS 2 - 8)
LED INDICATORS
(14) FORWARD
RF IN
REAR VIEW
(17) ALARM
OUTPUT CONNECTOR
Figure 2. Host Unit User Interface
Table 1. Host Unit User Interface
REF
NO
USER INTERFACE
DESIGNATION
DEVICE
1I/0 On/Off rocker
switch
(9) SERVICE
INTERFACE
CONNECTOR
(15) DC POWER
TERMINAL STRIP
(18)
PORT 1
(19)
PORT 2
(10) NET IN
CONNECTOR
(20)
PORT 3
(11) NET OUT
CONNECTOR
(16) COVER PLATE
(21) GROUNDING
FUNCTIONAL
DESCRIPTION
Provides DC power on/off control.
19722-A
STUD
2 P OW E R Mult i- color ed L ED
(green/yellow)
3 STANDBY Multi-colored LED
(green/yellow/red)
4 HOST UNIT Multi-colored LED
(green/yellow/red)
5 REMOTE UNIT Multi-colore d LED
(green/yellow/red)
6 D R I V E Mult i- c o lored LED
(green/yellow/red)
Indicates if the HU is powered (green) or unpowered (off). See Note.
Indicate s if the system is in the Normal (off),
Standby (blinking green), Test (blinking red), or
Program Load (blinking yel low) state. See Note.
Indicates if the HU is normal (green), ov erheated
(yellow), or fault y (red). See Note.
Indica tes if no alar ms (green), a minor alarm
(yello w) , o r a majo r alar m ( re d) is r ep ort ed b y the
RU. See Note.
Indicate s if the level of the RF input signal to the
HU is normal (green), low (yellow), or high
(red). See Note.
Page 3
© 2004, ADC Telecommunications , Inc.
ADCP-75-169 • Issue 1 • June 2004
Table 1. Host Unit User Interface, continued
REF
NO
USER INTERFACE
DESIGNATION
DEVICE
7 PORT 1/PORT 2 Multi-colored LED
(green/red)
Indicates if the reverse/forward path optical signals from the STM/HU are normal (green), if no
FUNCTIONAL
DESCRIPTION
signals are detected (red), or if excessive errors
are detected (red). See Note.
8PORT 3
(diversity unit only)
Mult i- c o lored LED
(green/yellow)
Indicates if the diversity reverse path optical signal
from the RU is normal (green), if no signal is
detected (yellow), or if excessive errors are
detected (yellow). See Note.
9 SERVICE DB-9 connector
(female)
Connection point for the RS-232 service interface cable.
10 NET IN RJ-45 jack (female) Connection point for the CAN interface input
cable.
11 NET OUT RJ-45 jack (female) Connection point for the CAN interface output
cable.
12 REV RF OUT N-type female RF
coaxia l connector
13 REV DIV RF OUT N-type female RF
coaxia l connector
14 FWD RF IN N-type female RF
coaxia l connector
Output connection point for the primary reverse
path RF coax ial cable.
Output connection point for the diversity reverse
path RF coax ial cable.
Input connection point for the forward path RF
coaxial cable.
15 POWER 24–48 VDC Screw-type terminal
Connection point for the DC power wiring.
strip
16 No designation Cover plate Covers the mounting slot for the wavelength divi-
sion multiplexer module.
17 ALARM OUTPUT Screw-type terminal
connector (14–26
AWG)
18 PORT 1 SC connector
(single-mode)
19 PORT 2 SC connector
(single-mode)
20 PORT 3
(diversity unit only)
SC connector
(single-mode)
Connection point for an external alarm system.
Includes normally open (NO), normally closed
(NC), and common (COM) wiring connections.
Output connection point for the forward path
optical fiber.
Input connection point for the reverse path primary optical fibe r.
Input connection point for the reverse path diversity optical f iber.
21 Chassis ground stud Connection point for a chassis grounding wire.
Note: A more detailed description of LED operation is provided in the applicable System Operat ion and
Maintenance Manual.
Page 4
© 2004, ADC Telecommunications , Inc.
3 HOST UNIT ACCESSORIES
This section p rovides a brief description of various accessory items tha t a re available separately.
The accessory items may or may not be required depending on the application.
3.1 Interface Panels
The interf ace panels are accessory items that are used when multiple EBTS’ s require connection
to a single HU. Two types of panels are available: the Primary Interface Panel and the
Expansion Panel. The Primary Interface Panel, shown in Figure 3, provides combining and
splitting (as need ed) of the forwa rd and rev e rse path RF signal. The Primary Inte rface Panel also
provides atte nuation of the forward path signal to the level required for input to the HU. Up to 6
EBTS’s may be connected to a single HU using the Primary Interface Panel.
ADCP-75-169 • Issue 1 • June 2004
18221-A
Figure 3. Primary Interface Panel
The Expansion Panel, shown in Figure 4, is used in conjunction with the Primary Interface
Panel when more than 6 EBTS’ s must be connected to a single HU. The Primary Interface Panel
can support two Expansion Panels and each Expansion Panel can support up to six EBTS’s. For
complete information about the SMR Interface Panels, refer to the Digivance Long Range
Coverag e Solution SMR Interface Panels User Manual (ADCP-75-143).
© 2004, ADC Telecommunications , Inc.
Page 5
ADCP-75-169 • Issue 1 • June 2004
Figure 4. Expansion Panel
3.2 Wavelength Division Multiplexer System
The Wavelength Division Multiplexer (WDM) system is an accessory product that is used when
it is desirable or necessary to combine the forward and reverse path optical signals from one
Digiv ance syst em onto a single optica l fi ber. Each WDM system consists of a host module and a
remote module. The HU provides a mounting slot for installing a WDM host module. Both the
RU outdoor cabinet the RU indoor mounting shelf provide a mounting slot for installing a
WDM remote module.
18824-A
Each WDM module consists of a bi-directional wavelength division multiplexer mounted
within a power-paint coated sheet metal enclosure. A straight SC-type optical connector port is
provided for connecting the forward/reverse path optical fiber to the WDM module. A pair of
pigtail leads with SC-type connectors are provided for connecting the WDM module to the
forward and reverse path optical ports on the HU or STM. The WDM host/remote module is
shown in Figure 5.
17013-A
Figure 5. WDM Host/Remote Module
Page 6
© 2004, ADC Telecommunications , Inc.
3.3 Coarse Wavelength Division Multiplexer System
The Coarse Wavelength Division Multiplexer (CWDM) system is an accessory product that is
used when it is desirable or necessary to combine the forward and reserve path optical signals
from up to four Digivance systems onto a single optical fiber. Each CWDM system consists of a
Host Module, Host Module mounting shelf, and Remote Module. The CWDM Host Module
mounting shelf can support up to three CWDM Host Modules. The RU single-STM mounting
shelf and the outdoor cabinet s provide a mount ing slot for installing a CWDM Remote Module.
The CWDM Host Module and Host Module Mounting Shelf are shown in Figure 6. The
CWDM Remote Module is shown in Figure 7. For complete information about the CWDM
system, refer to the Digivance System Coarse Wavelength Division Multiplexer User Manual
(ADCP-75-142).
ADCP-75-169 • Issue 1 • June 2004
18647-A
Figure 6. CWDM Host Module and Host Module Mounting Shelf
18648-A
Figure 7. CWDM Remote Module
© 2004, ADC Telecommunications , Inc.
Page 7
ADCP-75-169 • Issue 1 • June 2004
4 INSTALLATION PROCEDURES
This section provides the installation procedures for the HU and the WDM host module
(accessory item). The installation procedures for the Interface Panels are provided in the
Digiv ance Long Range Cove rage Solution SMR Interface Panels User Manual (ADCP-75-143).
The installation procedures for the CWDM Host Module and the Host Module Mounting Shelf
are provided in the Digivance System Coarse Wavelength Division Multiplexer User Manual
(ADCP-75-142). Installation of the RU components may proceed separately from installation of
the HU.
4.1 Before Starting Installation
Before beginning the installation, review the system design plan with the system engineer.
Make sure each equipment installation site is identified and located and all cable runs are
mapped out. Also identify all tools and materials that are required to complete the ins tallation.
4.1.1 Tools and Materials
The following tools are required to complete the procedures in this section:
• Box cutter
• Pencil or scribe
• Medium size flat-bladed screwdriver
• Phillips scre wdriver (#2)
• TORX screwdriver (T20 bit)
• Pliers
• Wire cutters
• Wire stripper
• Tool kit for attaching N-type male connectors to coaxial cable
• Multimeter
• Optical power meter
The followin g materials are required to complete the procedures in this se ction:
• #18 AWG (1.0 mm) insulated stranded copper wire (for chassis grounding wire)
• #18 AWG (1.0 mm) red and black insulated copper wire (for DC power wires)
• Category 3 or 5 cable (for external alarm system wires)
• #6 ring terminal (1) for #18 wire (for chassis gr ound wire connection)
• #6 fork terminals (2) for #18 wire (fo r DC power wiring connection)
• Single-mode patch cord(s) with SC connectors (1, 2 or 3 depending on the application)
• High performance, flexible, low-loss 50- ohm coaxial cable
• N-type male connectors
• Wire ties
Page 8
© 2004, ADC Telecommunications , Inc.
4.2 Unpacking and Inspection
This section provides instructions for opening the shipping boxes, verifying that all parts have
been received, and verifying that no shipping damage has occurred. Use the following
procedure to unpack and inspec t the HU and any acce ssories:
1. Open the shipping cartons and carefully unpack each component from the protective
packing material.
2. Check each component for broken or missing parts. If there are damages, contact ADC
(see section 6 at the end of this manual) for an RMA (Return Material Authorization) and
to reorder if replacement is required.
4.3 OSP Fiber Cable Installation Guidelines
The outside plant (OSP) fiber optic cables should be routed between the HU and RU and
terminated befor e the equipment is installed. A diagram of a typi cal OSP cable routing is shown
in Figure 8. At the HU, the OSP cable should be terminated at a fiber distribution panel and
spliced to pigtails. Jumper patch cords may then be used to link the HU optical ports to the OSP
cable terminations. Whenever possible, a guideway such as the FiberGuide system should be
provided to protect the fiber optic patch cords from damage and to prevent excessive bending.
The procedures for conn ectin g the OSP cable opt ical fi bers to the HU is provi ded in Section 4.8.
ADCP-75-169 • Issue 1 • June 2004
SPLICE
X
TERMINATION
PATCH
CORDS
INDOOR
REMOTE SITE
PATCH
CORDS
FIBER DISTRIBUTION
PANEL
STM
HOST UNIT
FIBER DISTRIBUTION
PANEL
HOST SITE
X
OUTSIDE PLANT
OUTDOOR
REMOTE SITE
INDOOR
MOUNTING
SHELF
STM
INDOOR/OUTDOOR
X
X
CABLE
OUTDOOR
CABINET
CABLE WITH
PIGTAIL LEADS
SPLICE
ENCLOSURE
18626-B
Figure 8. Typical Fiber Optic Cable Routing
© 2004, ADC Telecommunications , Inc.
Page 9
ADCP-75-169 • Issue 1 • June 2004
When routed to the RU outdoor cabinet, the OSP fiber optic cable should be spliced to a
connectorized outdoor-rated cable (consisting of individual jacketed pigtails) which is then
routed into the outdoor cabinet. The individual pigtails can then be connected directly to the
STM optical ports. A connector is provided on the bottom of the RU outdoor cabinet to seal the
cable entry point and provide strain relief. The procedure for routing the fiber cable into an
outdoor cabinet in provi ded in the applic able Remote Unit Installat ion and Maintenance Manual
(see Related Publicat ions section).
When routed to the RU indoor mounti ng sh elf, the OSP cable should be terminated at a fiber
distribution panel and spliced to pigtails. Jumper patch cords may then be used to link the STM
optical ports to the OSP cable terminations. Whenever possible, a guideway such as the
FiberGuide sys tem should be provi ded to protect the fiber optic patc h cords from damage and to
prevent excessive bending. The procedure for connecting the OSP optical fibers to an STM
mounted in the indoor mounting shel f is provide d in the applicable Remote Unit Insta llatio n and
Maintenance Manual (see Related Publications section).
4.4 HU Mounting Procedure
The HU may be mounted in either a 19-inch or 23-inch EIA or WECO equipment rack. Both
US standard and metric machine screws are included for rack mounting the HU. When loading
the HU in a rack, make sure the mechanical loading of the rack is even to avoid a hazardous
condition such as a severely unbalanced rack. The rack should safety support the combined
weight of all the equipment it holds. In addition, maximum recommended ambient temperature
for the HU i s 50º C (1 22º F). Al low sufficient air circu lation or s pace betw een units when th e
HU is installed in a multi-rack assembly because the operating ambient temperature of the rack
environment might be greater than room ambient.
Warning: Wet conditions increase the potential for receiving an electrical shock when
installing o r using el ectrica lly pow ered equipmen t. To prevent electrica l shock, never inst all or
use electrical equipment in a wet loca tion or during a lightning storm.
Note: To insure that all optical connectors remain dust-free during installation, leave all dust
caps and dust protectors in pla ce until directed to remove them for connect ion.
Use the following pr ocedure to install the HU in the equipment rack:
1. The HU is shipped with the mounting brackets installed for 19-inch rack installations. If
mounting the HU in a 19-inch rack, proceed to step 4. If mounting the HU in a 23-inch
rack, proceed to step 2.
2. Remove both mounting brackets from the HU (requires TORX screwdriver with T20 bit)
and save screws for reuse.
3. Reinstall both mounting brackets so the long side of the bracket is flush with the HU front
panel as shown in Figure 9. Use the screws removed in step 2 to re-attach the brackets to
the HU chassis.
Page 10
© 2004, ADC Telecommunications , Inc.
ADCP-75-169 • Issue 1 • June 2004
FOR INSTALLATION IN 23-INCH
RACKS, REMOVE AND REINSTALL
MOUNTING BRACKETS AS SHOWN
17864-A
Figure 9. Installing the Mounting Brackets for 23-Inch Rack Installations
4. Position t he HU in the designated mount ing space in the rack (pe r system design plan) and
then secure ( but do not ti ghten) the HU to the rack using the four mac hine screws provided
(use #12-24 or M6 x 10 screws, whichever is appropriate) as shown in Figure 10.
Note: Provide a m inimum of 3 inches (76 mm) of clear ance space on both the left and
right sides of the HU for air intake and exhaust.
17865-A
Figure 10. HU Rack Mount Installation
© 2004, ADC Telecommunications , Inc.
Page 11
ADCP-75-169 • Issue 1 • June 2004
4.5 Chassis Ground Connection
A stud is provide d on the rear side of the chassis for connecting a grounding wire to the chassis.
Use the following procedure to connect the grounding wire to the chassis and to route the
grounding wire to an appro ved earth ground source.
1. Obtain a length of #18 AWG (1.00 mm) insulated stranded copper wire for use as a
chassis grounding wire.
2. Terminate one end of the wire with a ring terminal.
3. Locate the chassis gr ound stud at the rear of the HU as shown in Figure 11.
4. Attach the ring end of the wire to the chassis ground stud (see Figure 11).
5. Route the free end of the chassis grounding wire to an approved (per local code or
practice) earth gr ound source.
6. Cut the chassis grounding wire to length and connect it to the approved ground source as
required by local code or practice.
Note: Be sure to maintain reliable grounding. Pay particular attention to ground source
connections.
4.6 Coaxial Cable Connections
The RF interface be tween the HU and the EBTS is supported through either two (non-diversity)
or three (diversity) type N female connectors mounted on the HU rear panel. On non-diversity
units, one connector provides the coaxial cable connection for the forward path (downlink)
signal and the other connector provides the coaxial cable connection for the reverse path
(uplink) signal. On diversity units, a third connector provides the coaxial cable connection for
the dive rsity reverse path (uplink) signal.
17866-A
Figure 11. Chassis Ground Stud
In most installations, it is usually necessary to insert an external attenuator into th e for ward
path link between the HU and the EBTS. A signal level that is greater than –9 dBm will
overdrive and possibly damage the HU re ceiver. Before completing the forward path connection
at the EBTS, verify that the composite forward path RF signal level at the HU is between –9
Page 12
© 2004, ADC Telecommunications , Inc.
ADCP-75-169 • Issue 1 • June 2004
and –40 dBm. Refer to the applicable System Operation and Maintenance Manual for the
procedure to determine the forward path input signal level. If the Primary Interface Panel and
Expansion Panel are required, refer to the Digivance LRCS SMR Interface Panels User Manual
(ADCP-75-143) for the coaxial cable installation procedures.
The HU should be mounted as close as possible to the EBTS to minimize cable losses. Use the
following pr ocedur e to r oute and co nnect t he forw ard and reverse path coax ial cabl es to the HU:
1. Obtain the required lengths of high performance, flexible, low loss 50-ohm coaxial
communications cable (RG-400 or equivalent) for all coaxial connections.
2. Route the forward and reverse path coaxial cables and the diversity reverse path cable (if
the HU supports diversity) between the HU and the EBTS interface (per system design
plan) and cut to the required length. Allow sufficient slack for dressing and organizing
cables at the HU and for installing an external attenuator in the forward path link.
3. Terminate each cable wi th an N-type male con nector following the conn ector supplier’s
recommendations.
4. If required, install an external attenuator in the forward path.
Note: The composite forward path RF signal level at the HU must be between –9 and
–40 dBm. Do not con nect the forward path cabl e until the composite fo rward path RF
signal le vel is measured and the amount of external attenuation required is determined.
5. Connect the forward path cable to the FORWARD RF IN connector on the HU front
panel as shown in Figure 12.
6. Connect the reverse path cable to the REVERSE 1 RF OUT connector on the HU front
panel (see Figure 12).
REVERSE 1
RF OUT CONNECTOR
(REVERSE PATH)
REVERSE 2
RF OUT CONNECTOR
(DIVERSITY
REVERSE PATH)
19719-A
FORWARD RF IN
CONNECTOR
(FORWARD PATH)
TYPE-N MALE
CONNECTOR
Figure 12. Forward and Reverse Path Coaxial Cable Connections
© 2004, ADC Telecommunications , Inc.
Page 13
ADCP-75-169 • Issue 1 • June 2004
7. If the HU supports diversity, connect the diversity reverse path cable to the REVERSE 2
RF OUT connector on the HU front panel (see Figure 12).
8. Dress and secure cables at the HU.
9. Complete all remaining coaxial connections as specified in the system design plan.
4.7 WDM Mounting Procedure (Accessory)
A bi-directional wavelength division multiplexer (WDM) module is available as an accessory
item for the Digivance system. If the application does not require the use of a WDM system,
skip this section and proceed to Section 4.8. The WDM mounts in a slot that is provided at the
rear side of the HU.
Use the following pr ocedure to install the WDM:
1. Remove the cover plate from the WDM mounting slot located on the rear side of the HU
as shown in Figure 13.
2. Slide the WDM into the mounting slot.
3. Push inward on the two Push/ Pull fasteners to secure the WDM to the HU.
4. Carefully coil up the two WDM pigtails to protect them from damage prior to connection
to the HU optical ports.
WDM MODULE
REMOVE COVER PLATE
FOR WDM MODULE
INSTALLATION
Figure 13. WDM Installation
19720-A
4.8 Optical Connections
The optical interface between the HU and the RU is supported by either two (non-diversity) or
three (diversity) optical ports. Each optical port consists of an SC optical adapter which is
mounted on the HU front panel. The PORT 1 port provides the optical connection for the
forward path ( downlink) signal. The PORT 2 port provide the optical connection for the rev erse
Page 14
© 2004, ADC Telecommunications , Inc.
ADCP-75-169 • Issue 1 • June 2004
path (uplink) signal. The PORT 3 port provides the optical connection for the diversity reverse
path (uplink) signal .
The optical connections are dependent on whether or not a WDM host module (accessory) or
CWDM host module (accessory) is installed:
• If the installation does not include either a WDM or CWDM module, proceed to
Section 4.8.1 for the optical connections procedure.
• If the installation includes a WDM module, proceed to Section 4.8.2 for the optical
connections procedure.
• If the installation includes a CWDM module, refer to the Digivance System Coarse
Wavelength Division Multiple xe r User Manual (ADCP-75-142) for the optical connection
procedure.
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 transmitter of any 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 transmitter or optical fiber connector to avoid the
potential of dangerous amounts of radiation exposure. This practice also prevents dirt particles
from ente ring the connector.
4.8.1 Optical Connections Without WDM or CWDM System
Use the following procedure to connect the optic al fi bers when a WDM is not installed with the HU:
1. Obtain two (non-diversity) or three (diversity) patch cords that are of sufficient length to
reach from the HU to the fiber dist ribution panel.
2. Designate one of the patch cords as the for war d pa th link and the other as the reverse
path link and attach an identification label or tag next to the connector. For diversity
systems, designate and label or tag a third patch cord as the diver sity reve r s e p a t h link.
3. Remove the dust caps from the HU optical ports and from the patch cord connectors that
will be connected to the HU.
4. Clean each patch cord connector following the patch cord supplier’s recommendations.
Note: To protect the optical receivers, insert a 15 dB attenuator in each optical path. When
the system is turned-up and test ed, the attenuator may be resized or removed.
5. Insert each patch cord connector into the appropriate optical port as shown in Figure 14
and as specified by the followin g :
PORT 1 - Forward path patch cord
PORT 2 - Reverse path patch cord
PORT 3 - Diversity reverse path patch cord
© 2004, ADC Telecommunications , Inc.
Page 15
ADCP-75-169 • Issue 1 • June 2004
PORT 1
FORWARD PATH
PORT 2
REVERSE PATH
19721-A
PORT 3
DIVERSITY
REVERSE PATH
Figure 14. Fiber Optic Cable Connections To Host Unit
6. Route the patch cords from the HU to the fiber distribution panel.
Note: The HU o p tic al adapters are angled to t he left. Therefore, always route patch cords
to the HU from the left side of the rack. Routing patch cords to the HU from the right may
exceed the bend radius limitations for the optical fiber.
7. At the fiber distribution panel, identify the OSP cable optical fiber terminations that
correspond to the forwa rd , reverse, and diversity reve rse (if supported) paths.
8. Remove the dust caps from the OSP cable optical fiber adapters and from the patch cord
connectors.
9. Clean each pat ch cord connector (follow patch cord supplier’s recommendations) and then
mate the connector with the appropriate OSP cable adapter.
10. Store any excess patch cord slack at the fiber distribution panel.
4.8.2 Optical Connections With WDM System
Use the following procedure to connect the optical fibers when a WDM module is installed with
the HU:
1. Obtain a patch cord tha t is of sufficient length to reach from the WDM module to the fiber
distribution panel.
2. Remove the dust cap from the optical port (Port 1) on the WDM module and from the
patch cord connector that will be connected to the WDM module.
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© 2004, ADC Telecommunications , Inc.
ADCP-75-169 • Issue 1 • June 2004
3. Clean the patch cord connector (follow patch cord supplier’s recommendations).
Note: To protect the optical receivers, insert a 15 dB attenuator in each optical path. After
the optical powe r has been measured, the attenuator may be resized or removed.
4. Insert the connec tor into one of the WDM module’s optical port (port 1).
5. Route the patch cord from the WDM to the fiber distribution panel.
6. Identify the OSP cable opt ical fiber termination that corresponds to the RU.
7. Remove the dust cap from the OSP cable optical adapter and from the patch cord
connector.
8. Clean the patch cord connector (follow patch cord supplier’s recommendations) and then
mate the connector with the appropriate OSP cable adapter.
9. Store any excess patch cord slack at the fiber distribution panel.
10. Remove the dust caps from the HU optical ports and from the WDM pigtails that will be
connected t o the HU.
11. Clean each pigtai l connector (follow the procedures provided with the WDM module) and
then insert the connector into the appropriate optical port on the HU as shown in Figure 14
and as diagramed in Figure 15.
Note: The HU opt i cal ad ap ters are angled t o the left. Therefore, pigtails should always be
routed to the HU from the left side of the rack. Routing pigtails to the HU from the right
side of the rack may exceed the bend radius limitations for the optical fiber.
HOST UNIT
WAVELENGTH
DIVISION
MULTIPLEXER
BI-DIRECTIONAL
FIBER LINK WITH
REMOTE UNIT
PORT1PORT
FORWARD
PATH
WDM
PIGTAILS
123
Figure 15. Fiber Optic Connections To WDM Module
2
REVERSE
PATH
PORT
3
REVERSE PATH
(IF SUPPORTED)
DIVERSITY
FIBER DISTRIBUTION
PANEL
X
X
FROM STM
TO/FROM REMOTE
WDM MODULE
19718-A
12. If the HU supports diversity, follow steps 2–5 in Section 4.8.1 for routing and connecting
the dive rsity reverse path link.
© 2004, ADC Telecommunications , Inc.
Page 17
ADCP-75-169 • Issue 1 • June 2004
4.9 Controller Area Network Connections
Controller area Network (CAN) interface connections between multiple HU’s are supported by
a pair of RJ-45 jacks. One of the jacks is designated as the NET IN port and the other jack is
designated as the NET OUT port. The CAN interface allows up to 24 HU’s to be connected
together (in daisy-chain fashion) and controlled through a single Digivance EMS computer. A
one meter long cable is available (accessory) for CAN connections. Use the following
procedure to connect CAN interf ace cables between multiple HU’s:
1. Connect one end of the CAN interface cable (accessory) to either the NET IN or NET
OUT port on HU #1 as shown in Figure 16.
2. Route the CAN interface cable to HU #2 and connect the cable’s free end to the port that is
the logical opposite of the CAN interface connection at HU #1.
Note: Connect OUT to IN and IN to OUT. If connected to a NET OUT port at HU #1,
connect to the NET IN port at HU #2. If connected to a NET IN port at HU #1, connect to
a NET OUT port at HU #2.
3. If a third HU will be connected to the network, connect a second CAN interface cable to
the remaining network por t on HU #2.
NET IN
NET OUT
17869-B
RJ-45 CONNECTOR
DETAIL
Figure 16. Controller Area Network Connections
4. Route the second CAN interface cable to HU #3 and connect the cable’s free end to the
port that is the logical opposite of the CAN interface connection at HU #2.
5. Repeat step s 3 and 4 for each additional HU that is added to the network up to a total of 24
HU’s. A diagram of typical CAN interface connections is shown in Figure 17.
Page 18
© 2004, ADC Telecommunications , Inc.
ADCP-75-169 • Issue 1 • June 2004
HOST UNIT 1 HOST UNIT 2 HOST UNIT 3
NET IN NET OUT NET IN NET OUT NET IN NET OUT
Figure 17. Configuring CAN Connections with Multiple Host Units
4.10 EMS Computer Connection
The service interface connection between the HU and the EMS computer is supported by a
single DB-9 female connector. The service connector provides an RS-232 DTE interface. A
three meter long straight-through RS-232 interface cable is available (accessory) for connecting
the EMS computer to the HU. Use the following procedure to install the service interface cable:
1. Connect one end of the service interface cable (accessory) to the SERVICE port as shown
in Figure 18.
2. Route th e service inter face cable to the EMS computer an d connect the free end of the
cable to the computer’s RS-232 DCE port. Refer to the user manual provided with the
computer to locate and configure the specified port.
CONTROLLER AREA NETWORK
INTERFACE CABLES
16900-B
TO NEXT HOST UNIT
(NOTE: LAST HOST HAS NO
CONNECTION AT NET OUT)
Figure 18. Service Interface Connection
17870-A
Page 19
© 2004, ADC Telecommunications , Inc.
ADCP-75-169 • Issue 1 • June 2004
4.11 External Alarm System Connections
The alarm interfac e between the HU and an exte rnal alar m system is suppor ted by a six- termina l
plug (with screw-type terminals) that connects to a receptacle mounted on the HU front panel.
The terminal plug provides connections to normally open (NO) and normally closed (NC) dry
type alarm contacts for both major and minor al arms. A categ ory 3 or 5 cable is typic ally use d to
connect th e HU to the external alarm system. U se the foll owing proced ure to instal l the alarm
wiring and connect it to the HU:
1. Obtain the required le ngth of category 3 or 5 cable.
2. Route the cable between the HU and the external alarm system (if not already routed) and
then cut t o the required length. Allow sufficient slack for dressi ng a nd organizing the cable
at the HU.
3. Strip back the outer cable sheath and insulation to expose the wires at both ends of the
cable and strip back 0.2 inches (5 mm) of insulation from each wire.
4. Connect the Major alarm wire pair to the MAJOR COM/NC or MAJOR COM/NO
terminals (whic hever is requ ired by the ex ternal a larm sys tem) on th e HU alarm termi nal
connector (supplied with HU) as shown in Figure 19.
NO
COM
NC
MINOR ALARM WIRES
ALARM
CONNECTOR
NC
COM
NO
MAJOR ALARM WIRES
Figure 19. External Alarm System Connections
17871-A
5. Connect the Minor alarm wire pair to the MINOR COM/NC or MINOR COM/NO
terminals (whic hever is requ ired by the ex ternal a larm sys tem) on th e HU alarm termi nal
connector (s ee Figure 19).
Page 20
© 2004, ADC Telecommunications , Inc.
6. Connect the Major and Minor alarm wire pairs to the appropriate terminals on the external
alarm system.
7. Dress and secure cable per standard industry practice.
4.12 DC Power Connections
The HU is powered by ± 21 to 60 VDC power (nominal ± 24 or ± 48 VDC). The power is fed to
the HU through a screw-down type terminal strip located on the rear side of the unit. Power to
the HU must be supplied through a fuse panel such as the 20 position PowerWorx GMT Fuse
Panel (available separately) and the power must be protected with a 3 Amp GMT fuse. Use the
following pr ocedure to install the power wiring:
1. Obtain one pair of #18 AWG (1.00 mm) red and black insulated copper wire for use as the
power wiring.
2. Terminate one end of each wire with a fork terminal as shown in Figure 20.
3. Connect the power wires to the power terminal strip at the rear of the HU.
4. Route the free ends of the wires to the fuse panel and locat e the terminals that will be used
for the power feed. Refer to the user manual provided with the fuse panel for specific
information.
ADCP-75-169 • Issue 1 • June 2004
5. Remove the fuse from the circuit that will power the HU.
+ (BLACK)
FORK
TERMINALS
– (RED)
#18 AWG
(1.0 mm)
COPPER
WIRE
17872-B
Figure 20. DC Power Connections
© 2004, ADC Telecommunications , Inc.
Page 21
ADCP-75-169 • Issue 1 • June 2004
6. Connect the power wires to the appropriate terminals as specified in the fuse panel user
manual.
Note: When connecting the equipment to the supply circuit, be sure to check equipment
nameplate ratings to avoid overloading circuits which may cause damage to over-current
protection de vices and supply wiring.
7. Dress and secure the power wiring at the fuse panel and the HU. The procedure for
checking the voltage level and verifying that the HU is ready to power up is provided in
the applicable System Operation and Maintenance Manual (see Related Publications
section).
4.13 Installation Complete
When the installation is complete, refer to the applicable System Operation and Maintenance
Manual (see Related Publications section) for the system turn-up and test procedures.
5 MAINTENANCE
This section provides the HU maintenance procedures. Refer to this section when scheduled
maintenance is required. The fault isolation and troubleshooting procedures are provided in the
applicable System Opera tion and Maintenance Manual (see Related Publications se ction).
5.1 Host Unit Fan Replacement Procedure
The HU is equipped with two cooling fans which are located on the right side of the HU
enclosure. The cooling fans blow cool ai r into the enclosure. Heated air is exhausted through the
vent openings on the left side of the enclosure. Replacement of the fans requires that the HU be
turned off for a sh o rt pe ri od of t im e. Th e rec o mm en d ed replacement i nte rval is 60 m o n ths. U s e
the follo wing procedure to remove and replace the HU cooling fans:
1. Before working on the HU or handling a fan, slip on an Electro-Static Discharge (ESD)
wrist strap and connect the ground wire to an earth ground source. Wear the ESD wrist
strap while completin g each sect ion of the fan installation procedure.
Warning: Electronic components can be damaged by static electrical discharge. To prevent
ESD damage, always wear an ESD wrist strap when working on the HU, STM, or LPA and
when handling electronic components.
2. Notify the NOC or alarm monitoring syste m operator that the system is going offline.
3. Place the HU On/Off switc h in the OFF position (press O).
4. Remove the six flat-head screws (requires TORX screwdriver with T10 bit) that secure the
fan/grill assembly to the right side of the HU enclosure as shown in Figure 21. Save
screws for reuse.
5. Carefully withdraw the fan/grill assembly from the enclosure until the wiring harness is
exposed and the connector s are accessible.
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© 2004, ADC Telecommunications , Inc.
ADCP-75-169 • Issue 1 • June 2004
17873-A
Figure 21. Host Unit Fan/Grill Assembly Removal
6. Lift the small latch on each wiring harness connector and carefully unplug each connector
from the circuit board connector.
7. Remove the plastic rivets that secure each fan to the grill by pushing outward on the rivet
center post until the rivet can be withdrawn from the grill as shown in Figure 22.
16173-B
Figure 22. Removing Host Unit Fans From Grill
8. Remove both f ans from the grill
9. Use the ri vets remov ed in step 7 to secure the replacement fans to the grill. Orient each fan
so the wiring harness is on the top and the arrow on the fan points into the enclosure.
10. Connect the two wiring harness connectors to the circuit board connectors.
11. Secure the f an/grill assembly to the side of the enclosure (see Figure 21) using the six flathead screws removed in step 4.
12. Place the H U On/ O ff switch i n the ON position (press I).
13. Verify that the fans run properly following powe r-up.
14. Notify the NOC or alarm monit oring syst em operator that the syste m is going ba ck online.
© 2004, ADC Telecommunications , Inc.
Page 23
ADCP-75-169 • Issue 1 • June 2004
6 CUSTOMER INFORMATION AND ASSISTANCE
PHONE:
EUROPE
Sales Administration: +32-2-712-65 00
Technical Assistance: +32-2-712-65 42
EUROPEAN TOLL FREE NUMBERS
Germany:
UK:
Spain:
France:
Italy: 0800 782374
U.S.A. OR CANADA
Sales: 1-800-366-3891 Extension 73000
Technical Assistance: 1-800-366-3891
Connectivity Extension 73475
Wireless Extension 73476
ASIA/PACIFIC
Sales Administration: +65-6294-9948
Technical Assistance: +65-6393-0739
ELSEWHERE
Sales Administration: +1-952-938-8080
Technical Assistance: +1-952-917-3475
WRITE:
ADC TELECOMMUNICATIONS, INC
PO BOX 1101,
MINNEAPOLIS, MN 55440-1101, USA
0180 2232923
0800 960236
900 983291
0800 914032
ADC TELECOMMUNICATIONS (S'PORE) PTE. LTD.
100 BEACH ROAD, #18-01, SHAW TOWERS.
SINGAPORE 189702.
ADC EUROPEAN CUSTOMER SERVICE, INC
BELGICASTRAAT 2,
1930 ZAVENTEM, BELGIUM
PRODUCT INFORMATION AND TECHNICAL ASSISTANCE:
connectivity_tac@adc.com
wireless.tac@adc.com
euro_tac@adc.com
asiapacific_tac@adc.com
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.
© 2004, ADC Telecommunications, Inc.
All Rights Reserved
13944-L
Printed in U.S.A.
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