ADC is a registered trademark of ADC Telecommunications, Inc., FlexWave is a trademark 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 73475
(in U.S.A. or Canada) or 952-917-3475 (outside U.S.A. and Canada), or by e-mail to connectivity_tac@adc.com.
This manual describes how to install and cable a URH Host chassis within a non-condensing
indoor environment such as inside a wiring closet or an outdoor controlled environment cabinet.
RELATED PUBLICATIONS
Listed below are related manuals, their content, and their publication numbers. Copies of these
publications can be ordered by contacting the 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). All ADC
technical publications are available for downloading from the ADC web site at www.adc.com.
Title/DescriptionADCP Number
ADC FlexWave™ Universal Radio Head (URH) Remote Installation Instructions78-347
ADC FlexWave™ Universal Radio Head (URH) System User Manual75-349
ADC FlexWave™ Universal Radio Head (URH) System EMS User Manual75-350
ADC FlexWave™ URH Remote Unit Mounting Kit Installation Instructions75-351
ADCP-75-348 • Issue 1 • 04/2008 • 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
-
Warning: Wet conditions increase the potential for receiving an electrical shock when
installing or using electrically-powered equipment. To prevent electrical shock, never install or
use electrical equipment in a wet location or during a lightning storm.
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.
Caution: This system is a RF Transmitter and continuously emits RF energy. Maintain 3 foot
(91.4 cm) minimum clearance from the antenna while the system is operating. Wherever
possible, shut down the RAN before servicing the antenna.
Caution: Always allowsufficientfiberlengthtopermitroutingofpatchcordsandpigtails
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 (5.1 cm).
Caution: Exterior surfaces of the RU may be hot. Use caution during servicing.
STANDARDS CERTIFICATION
FCC: This equipment complies with the applicable sections of Title 47 CFR Part 15 (Host
unit), Part 22 (800 MHz Cellular), Part 24 (1900 MHz - PCS), and Part 90 (800/900 - SMR).
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.
The Manufacturer's rated output power of this equipment is for single carrier operation. For
situations when multiple carrier signals are present, the rating would have to be reduced by 3.5
dB, especially where the output signal is re-radiated and can cause interference to adjacent band
users. This power reduction is to be by means of input power or gain reduction and not by an
attenuator at the output of the device.
Caution: Modifications not expressly approved by the party responsible for compliance could
void the user's authority to operate the equipment.
Note: To comply with Maximum Permissible Exposure (MPE) requirements, the maximum
composite output form the antenna cannot exceed 1000 Watts ERP (Cellular and SMR), the
antenna cannot exceed 1640 Watts EIRP (PCS), and the antenna must be permanently installed
in a fixed location that provides at least 6 meters (20 feet) of separation from all persons.
UL/CUL:
NEMA Type 6, per UL and CUL 50, Standard for Enclosures for Electrical Equipment. This
equipment provides the degree of protection specified by IP67 as defined in IEC Publication 529.
This will be installed in a restricted access location. This equipment complies with
Conforms to ANSI/UL Std. 60950. Certified to CAN/CSA STD C22.2 No 60950
UL/CUL: This Host equipment complies with UL and CUL 60950 Standard for Safety for
Information Technology Equipment, including Electrical Business Equipment.
FDA/CDRH: This equipment uses a Class 1 LASER according to FDA/CDRH Rules. This
product conforms to all applicable standards of 21 CFR Part 1040.
The acronyms and abbreviations used in this manual are detailed in the following list:
ACAlternating Current
BTSBase Transceiver Station
CCentigrade
CMCentimeter
CPUCentral Processing Unit
DARTDigital/Analog Radio Transceiver (DART board)
DASDistributed Antenna System
dBdecibel
dBcThe ratio (in dB) of the sideband power of a “signal” measured in a given band-
width at a given frequency offset from the center frequency of the same signal,
to the total inband power of the signal.
dB(FS)decibals (Full Scale – digital reading)
dBmdeciBels relative to 1mW
DCDirect Current
DivDiversity
EMSElement Management System
ESDElectrostatic Discharge
FFahrenheit
FCCFederal Communications Commission
GPSGlobal Positioning System
GUIGraphical User Interface
HUHost Unit
ICIndustry Canada
IFIntermediate Frequency
IPInternet Protocol
LEDLight Emitting Diode
LNALow Noise Amplifier
LPALinear Power Amplifier
LSELocation Services Equipment
LVDLow Voltage Disconnect
MUXMultiplexer
OSPOutside Plant
PAPower Amplifier
PCPersonal Computer
PCI Peripheral Component Interconnect bus
QMAQuick disconnect version of Sub Miniature version A
RANRadio Access Node
RDIRemote DART Interface (RDI board)
RFRadio Frequency
RURemote Unit
SeRFSerialized RF (SeRF board)
SFPSmall Form-Factor Pluggable Optical Transceiver
SMASubminiature version A; Small form factor coaxial connector
ULUnderwriters Laboratories
VA CVolts Alternating Current
VDCVolts Direct Current
VSWRVoltage Standing Wave Ratio
WDMWave Division Multiplex
WSPWireless Service Provider
The FlexWave URH product family of products is intended as a “next generation” distributed
antenna system (DAS). DAS products provide bidirectional transport of digitized RF spectrum.
Each link consists of a host unit (providing the interface between the base station RF ports and the
optical fiber) and at least one remote unit (providing the interface between the optical fiber and the
remote antenna). The difference in this product is the high-speed digitalization of a wideband
portion of spectrum, that allows for transport of RF signals over extended distances, without the
RF degradation that normally results when analog systems are impacted by optical effects.
The basic function of the FlexWave URH platform is to transport via fiber optic cable RF
signals form a Base Transceiver Station (BTS) to an antenna interface allowing communication
to a mobile device. Multiple BTS communication paths are allowed over a single URH system.
Diversity receive is supported. A block diagram of the system is shown in
Figure 1.
Figure 1. FlexWave URH Block Diagram
The basic function of the FlexWave URH simulcast (point-to-point) platform is to transport, via
fiber optic cable, RF signals form a Base Transceiver Station (BTS) to multiple antenna interfaces
allowing communication to a mobile device. Up to 8 simulcast remotes are supported.
The front access URH Host Unit interfaces with the BTS and performs the analog to digital and
electrical to optical conversions for transport to the URH Remote Units. A typical URH system
consists of a Host Unit (HU) and a Remote Unit (RU).
The HU is designed for maximum RF flexibility to address Carriers changing and evolving
spectrum needs, making the most use of cost efficient resources for serving multiple remotes
such as simulcast architecture and sharing of common functions such as power, control and
management over multiple host units. These features are designed into a compact package that
reduces the amount of overall rack space required within a BTS Hotel. Each host chassis can
support up to eight RUs.
The HU is a three rack-unit high single-unit assembly that mounts in a standard equipment rack.
The RU consists of an outdoor enclosure that houses various electronic components. The RU is
a modular self-contained enclosure. Together the HU and the RU together comprise an URH
system. Various accessory items are also available for use with each system. All items
referenced as “accessory items” are not furnished and must be purchased separately.
3HOST UNIT DESCRIPTION
A front view of the HU, shown in
fan assembly that are mounted within a powder-paint coated sheet metal enclosure. The enclosure
provides a mounting point for the circuit board and fan assembly and controls RF emissions. Fan
assembly can be replaced in the field. Host Unit may be upgraded once it is installed to support
additional URH Remote Units. This can be performed without disrupting service.
The HU is designed for use within a non-condensing indoor environment such as inside a wiring
closet or controlled environment cabinet. All controls, connectors, and indicators (except the
grounding point) are mounted on the HU front panel. Current versions of the HU allow vertical
cable guides to be installed over the mounting brackets on either side of the HU.
Figure 2
, consists of an electronic circuit board assembly and a
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.
3.2SeRF Card
3.2.1Network Interface Connection
SeRF front panel has an Ethernet port allowing interface communication with the internal
processor and transfer of data to the optical protocol allowing IP transport between the HU and
the remote(s). The network interface allows the HU to be controlled through a network.
Network interface connection between the HU and the network is supported by a RJ-45 jack 10/
100Base-T (IEEE802.3 compliant) with integrated green ACTIVITY and LINK LEDs. The
Ethernet port supports a maximum cable length of 100 meters (328 feet) to a hub or back-toback nodes. CAT5 or better cable should be used when making this connection. The Ethernet
connection should not be connected to an Ethernet circuit used outside the building.
ADCP-75-348 • Issue 1 • 04/2008
1. The IEEE Specification for Ethernet 100BaseT requires that two twisted pairs be used and that
one pair is connected to pins 1 and 2, and that the second pair is connected to pins 3 and 6.
2. Pinout information is shown in Tab le 1. See Figure 3 for RJ45 connector wiring
information.
SeRF front panel provides a craft port that can be used to provision remote units through the
optical protocol supported by a single RJ-45 connector. The Craft connector provides an Ethernet interface.
Craft interface connection between the HU and the network is supported by a RJ-45 jack 10/
100Base-T (IEEE802.3 compliant) with integrated green ACTIVITY and LINK LEDs. The
Ethernet port supports a maximum cable length of 100 meters (328 feet) to a hub or back-toback nodes. CAT5 or better cable should be used when making this connection.
Figure 3. RJ45 Connector Wiring
1. The IEEE Specification for Ethernet 100BaseT requires that two twisted pairs be used and that
2. Pinout information is shown in Table 1. See Figure 3 for RJ45 connector wiring
3.2.3Optical Interface
Optical connections between the HU SeRF card and the RU are supported through Small Formfactor Pluggable (SFP) transceivers. The optical interfaces are standard single-mode duplex LC
(flat polished UPC). There are 8 duplex optical interfaces, one for each simulcast remote.
3.3DART Card
The host DART provides the interface between base station equipment and the SeRF. It is a
band specific assembly and exists in the following versions:
• Cellular
•SMR 800
•SMR 900
•PCS
one pair is connected to pins 1 and 2, and that the second pair is connected to pins 3 and 6.
information.
The following features and capabilities are available on the DART Card:
• Amplifies, down-converts, filters and digitizes from a 1.5MHz to 35MHz band of the
incoming RF signal
• Converts incoming digital signal to analog, filters, amplifies and up-converts
• Provides bi-directional interface between parallel digital RF (to D/A and from A/D) and
Serial RF (SeRF) to/from SeRF board
• Performs digital up/down conversion and adjustable delay processing
• Non-contiguous bands and receive diversity is implemented with multiple DART Cards
3.3.1RF Signal Connections
The RF signal connections between the HU DART cards and the BTS are supported through
two (FWD RF IN and REV RF OUT) QMA-Type female connectors. One connector is used for
the forward path RF signal. The other connector is used for the reverse path RF signal. In some
installations, it may be necessary to install a Conditioning Panel and/or Duplexing Panel
(accessory items) to support the interface between the HU and the BTS. The HU should be as
close as possible to the BTS to minimize cable losses.
3.4System Card
ADCP-75-348 • Issue 1 • 04/2008
The System Interface Card gives additional front panel space for the SeRF card. The System
Card front panel also provides connections for alarm outputs, 10 MHz output, and status LEDs.
This card may be used to provide a 10 MHz clock reference to which the SeRF's Master clock is
frequency locked from the internal crystal oscillator. When the internal clock is not used the
clock can be obtained from an external 10 MHz input.
3.5Power Supply
HU is powered by a modular DC to DC power supply located on the lower left side of the
chassis. An On/Off switch is provided on the HU power supply module front panel.
HU is powered by ± 20 to ± 60 VDC power (nominal ± 24 or ± 48 VDC), power is fed to the HU
through a connector located on the front of the module. Power to the HU must be supplied
through a fuse panel (available separately). Each HU must be protected with a fuse.
3.6User Interface
The HU user interface consists of the various connectors, switches, terminals, and LEDs that are
provided on the HU front panel. The HU user interface points are indicated in
described in Tabl e 2.
8ON/OFFOn/Off rocker switch Provides HU power on/off control.
9POWER 20–60 VDCThree position
Connection point for the DC power wiring.
connector
SYSTEM CARD
10PWR (LED)GREEN
RED
11ALARM OUTPUTS
HOST
12ALARM OUTPUTS
REMOTE
13INT REF (LED)
EXT REF (LED)
Twelve position terminal block. Screwtype terminal
connector (14–26
AWG)
GREEN
OFF
GREEN
OFF
System Card Power Supply OK
System Card Power Supply Fault
Connection points for an major and minor dry
alarm contacts. Includes normally open (NO),
normally closed (NC), and common (COM) wir
ing connections.
Internal 10 MHz reference selected as the as Reference Clock.
Internal 10 MHz reference not selected.
External 10 MHz reference selected as the as
Reference Clock.
External 10 MHz reference not selected
-
14REF OUTQMA-Type female
15EXT REF INQMA-Type female
16PWR (LED)GREEN
17STATUS (LED)GREEN
18REV RF OUTQMA-Type female
19FWD RF INQMA-Type female
4HOST UNIT ACCESSORIES
This section provides a brief description of various accessory items that are available separately.
The accessory items may or may not be required depending on the application.
RF coaxial connector
RF coaxial connector
DART CARD
OFF
RED
YELLOW
RF coaxial connector
RF coaxial connector
Ref Clock
Ref Clock
Card is powered.
No power present at card.
OK
Fault
Unlocked
Output connection point for the primary reverse
path RF coaxial cable.
Input connection point for the forward path RF
coaxial cable.
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
URH system onto a single optical fiber. Each WDM system consists of a host module and a
remote module.
Both the host unit WDM module and the RU WDM module consist of a bi-directional wavelength
division multiplexer. The host unit WDM module is mounted within a powder-paint coated sheet
metal enclosure. A straight LC-type optical connector port is provided for connecting the forward/
reverse path optical fiber to the WDM module. A pair of pigtail leads with LC-type connectors are
provided for connecting the WDM module to the forward and reverse path optical ports on the HU
SeRF card.
The WDM host module mounting shelf and host module are shown in Figure 5. The WDM
module is shown in Figure 6.
Reliability at 25ºCMTBF 100,000 hoursIncluding fans
6INSTALLATION
This section provides the installation procedures for the HU and the WDM host module
(accessory item). Installation of the RU components may proceed separately from installation of
the HU.
6.1Before 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 installation.
• #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)
• Category 5 cable with RJ45 connectors for the Network and Craft port
• #6 ring terminal (1) for #18 wire (for chassis ground wire connection)
• #6 fork terminals (2) for #18 wire (for DC power wiring connection)
• Single-mode patch cord(s) with LC connectors (1 – 8 depending on the application)
• High performance, flexible, low-loss 50-ohm coaxial cable
• QMA-type male connectors
• Wire ties
6.2Unpacking 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 inspect the HU and any accessories:
Unpack and inspect the various components as follows:
1. Inspect the exterior of the shipping container(s) for evidence of rough handling that may
have damaged the components in the container.
2. Unpack each container while carefully checking the contents for damage and verify with
the packing slip.
3. If damage is found or parts are missing, file a claim with the commercial carrier and notify
ADC Customer Service. Save the damaged cartons for inspection by the carrier.
4. Refer to Section 8 if you need to contact ADC.
5. Save all shipping containers for use if the equipment requires shipment at a future date.
The outside plant (OSP) fiber optic cables should be routed between the HU distribution panel
and RU outside plant cabinet and terminated before the equipment is installed. A diagram of a
typical OSP cable routing is shown in
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 connecting the OSP cable optical fibers to the
HU is provided in
X
Section 6.8.
SPLICE
TERMINATION
ADCP-75-348 • Issue 1 • 04/2008
Figure 7. At the HU, the OSP cable should be terminated
A bi-directional wavelength division multiplexer (WDM) system is available as an accessory
item for the URH system. If the application does not require the use of a WDM system, skip this
section and proceed to
The WDM host module mounting shelf installs in the equipment rack with the HU. Each host
module mounting shelf can hold multiple modules and each host module can support two HU’s.
When multiple HU’s require connection to a WDM system, the host module mounting shelf and
the HU’s should be mounted in the equipment rack as shown in
allows the pigtail leads from the two host modules to be connected directly to the optical ports
on any one of the four HU’s.
POWERWORX
FUSE PANEL
WDM MOUNTING
SHELF
(WITHOUT MODULES)
Section 6.5.
Figure 8. This configuration
HOST SLACK FIBER STORAGE
HOST UNITS
The WDM host module mounting shelf may be mounted in either a 19-inch or 23-inch EIA or
WECO equipment rack. Four #12-24 screws are provided for securing the mounting shelf to the
rack. Use the following procedure to install the WDM host module mounting shelf in the
equipment rack and to mount the WDM modules in the WDM host module mounting shelf:
1. The WDM host module mounting shelf is shipped with the mounting brackets installed for
23-inch rack installations. If installing the mounting shelf in a 23-inch rack, proceed to
Step 4. If installing the mounting shelf in a 19-inch rack proceed to Step 2.
2. Remove both mounting brackets from the mounting shelf (requires Phillips screwdriver)
and save screws for reuse.
3. Reinstall both mounting brackets so the short side of the bracket is flush with the front
panel as shown in as shown in
Figure 9. Use the screws removed in Step 2 to attach the
new brackets to the mounting shelf.
4. Position the mounting shelf in the designated mounting space in the rack (per system
design plan) and then secure the mounting brackets to the rack using the four #12-24
machine screws provided.
5. Install each WDM host module in the mounting shelf. A rail on the side of the module fits
into a guide within the mounting.
6. Secure each host module to the mounting shelf by twisting the handle on each quarter-turn
fastener 90º.
7. Carefully store the pigtail leads from each host module. The routing and connection
procedures for the pigtails are provided in
6.5HU 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 safely support the combined
weight of all the equipment it holds. In addition, maximum recommended ambient temperature
for the HU is 55º C (131º F). Allow sufficient air circulation or space between units when the
HU is installed in a multi-rack assembly because the operating ambient temperature of the rack
environment might be greater than room ambient.
Figure 9. Installing the Replacement Mounting Brackets
Warning: Wet conditions increase the potential for receiving an electrical shock when
installing or using electrically powered equipment. To prevent electrical shock, never install or
use electrical equipment in a wet location or during a lightning storm.
Note: To insure that all optical connectors remain dust-free during installation, leave all dust
caps and dust protectors in place until directed to remove them for connection.
Use the following procedure 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
rack, proceed to Step 2.
2. Remove both mounting brackets from the HU (requires TORX screwdriver with T20 bit)
and save screws (six-screws on each side) for reuse.
3. Reinstall both mounting brackets so the short side of the bracket is flush with the HU front
panel as shown in
the HU chassis.
Step 4. If mounting the HU in a 23-inch
Figure 10. Use the screws removed in Step 2 to re-attach the brackets to
INSTALL MOUNTING
BRACKETS AS SHOWN FOR
INSTALLATION IN 23-INCH RACKS
22394-A
Figure 10. Installing the Mounting Brackets for 23-Inch Rack Installations
4. Position the HU in the designated mounting space in the rack (per system design plan) and
then secure (but do not tighten) the HU to the rack using the four machine screws provided
(use #12-24 or M6 x 10 screws, whichever is appropriate).
Note: Provide a minimum of 3 inches (76 mm) of clearance space on both the left and
right sides of the HU for air intake and exhaust.
5. Locate two vertical cable guides, not provided with the HU.
Note: A vertical cable guide kit is available separately as an accessory.
6. Back out the HU mounting screws just enough to provide clearance for installation of the
22395-A
REAR OF
CHASSIS
STAR
WASHER
HEX
NUT
GROUND
WIRE
cable guides.
7. Slide each cable guide into position for installation and then securely tighten the
corresponding mounting screws.
6.6Chassis Ground Connection
A stud is provided 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 approved 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 ground 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).
ADCP-75-348 • Issue 1 • 04/2008
Figure 11. Chassis Ground Stud
5. Route the free end of the chassis grounding wire to an approved (per local code or
practice) earth ground 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.
The RF interface between the HU DART card and the EBTS/BTS is supported through two type
QMA female connectors mounted on each DART front panel. 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.
In most installations, it is usually necessary to insert an
external attenuator
into the forward path
link between the HU and the BTS. A signal level that is greater than –9 dBm will overdrive and
possibly damage the HU receiver. Before completing the forward path connection at the BTS,
verify that the composite forward path RF signal level at the HU is between
–25 and +5 dBm
.
The HU should be mounted as close as possible to the EBTS/BTS to minimize cable losses. Use
the following procedure to route and connect the forward and reverse path coaxial cables to the
HU DART cards:
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 between the HU and the BTS 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 with an QMA-Type male connector following the connector
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 –25 and
+5 dBm. Do not connect the forward path cable until the composite forward path RF
signal level is measured and the amount of external attenuation required is determined.
5. Connect the forward path cable to the FWD RF IN connector on the HU DART front
panel as shown in
6. Connect the reverse path cable to the REV RF OUT connector on the HU DART front
panel (see
7. Repeat this procedure for the remaining DART cards in the HU.
8. Dress and secure cables at the right side of the HU.
9. Complete all remaining coaxial connections as specified in the system design plan.
The optical interface between the HU and the RU is supported by optical ports. Each optical
port consists of an SFP with LC optical transceivers mounted on the SeRF card front panel.
Each FWD port provides an optical connection for the forward path (downlink) signal. Each
REV port provide an optical connection for the reverse path (uplink) signal. Each REV port can
also provide the optical connection for the diversity reverse path (uplink) signal.
The optical connections are dependent on whether or not a WDM host module (accessory) is
installed:
• If the installation does not include a WDM module, proceed to Section 6.8.1 for the
optical connections procedure.
• If the installation includes a WDM module, proceed to Section 6.8.2 for the optical
connections procedure.
22411-A
Figure 12. Forward and Reverse Path Coaxial Cable Connections