Digivance is a registered trademark of ADC Telecommunications, Inc.
ADC 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.
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
• A description of the NXD system Radio Access Node (RAN);
• Installation procedures for the RAN;
• Maintenance procedures for the RAN;
• Product support information.
Procedures for installing and operating other NXD system components including the system
“Hub” and the EMS software that provides a user interface for the system, are available in other
ADC publications, listed under “Related Publications” below, and at appropriate points within
this manual.
RELATED PUBLICATIONS
ADCP-75-210 • Issue 1 • March 2007 • Preface
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
Digivance CXD/NXD Hub Installation and Maintenance Manual75-193
Provides instructions for installing and operating the NXD system Hub.
Digivance CXD/NXD SNMP Agent and Fault Isolation User Guide 75-195
Describes how to troubleshoot the system using the parameters accessed
through the NXD system SNMP agents.
Digivance CXD/NXD Element Management System User Manual75-199
Provides instructions for installing and using the Element Management System
(EMS) software for the NXD system.
Digivance NXD Multi-Band Distributed Antenna System Operation Manual75-209
Provides instructions for turning up and operating NXD equipment.
2 in. O.D. Quad Cellular/PCS Omni-Directional Antenna Installation Manual75-215
Provides instructions for installing an RF antenna for the NXD system
9 in. O.D. Quad Cellular/PCS Omni-Directional Antenna Installation Manual75-221
Provides instructions for installing an RF antenna for the NXD system
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.
Warn ing: 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
-
Warn ing: 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 RAN may be hot. Use caution during servicing.
The Digivance NXD antenna, which is mounted on top of a pole, radiates radio frequency
energy.
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.
STANDARDS CERTIFICATION
FCC: The Digivance NXD complies with the applicable sectionsofTitle47CFRPart15, 22,
24 and 90.
The Digivance NXD 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.
ADCP-75-210 • Issue 1 • March 2007 • Preface
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.
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 are 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 NXD RAN is able to withstand wind loads up to 150 mph.
The acronyms and abbreviations used in this manual are detailed in the following list:
ACAlternating Current
ANTMultiband Antenna
BIMBase Station Interface Module
BTSBase Transceiver Station
CCentigrade
CDRH Center for Devices and Radiological Health
C/MCPLRCellular SMR Multicoupler
CMCentimeter
cPCICompactPCI
CPUCentral Processing Unit
CXDCompact RAN
DASDistributed Antenna System
dB(FS)decibals (Full Scale – digital reading)
DCDirect Current
DivDiversity
EMSElement Management System
ESDElectrostatic Discharge
FFahrenheit
FDAU.S. Food and Drug Administration
FCCU.S. Federal Communications Commission
GPSGlobal Positioning System
ICIndustry Canada
INInch
IPInternet Protocol
KGKilogram
LEDLight Emitting Diode
LSELocation Services Equipment
LV DLow Voltage Disconnect
MHzMega Hertz
MTBFMean Time Between Failure
MUXMultiplexer
NodeAny CPU in the Digivance NXD system
NXDDigivance Neutral Host Product Line
OSPOutside Plant
PAPower Amplifier
PAAPower Amplifier Assembly
PCPersonal Computer
PCI Peripheral Component Interconnect bus
PICPA Interface Controller
P/MCPLRPCS Multicoupler
RANRadio Access Node
RDCRAN Down Converter
RDC2RAN Down Converter Version 2
RFRadio Frequency
RUCRAN Up Converter
RUC2.XRAN Up Converter Version 2.X
RUC3RAN Up Converter Version 3
SFPSmall Form-Factor Pluggable Optical Transceiver
SIFSonet Interface Module
SNMPSimple Network Management Protocol
SONETSynchronous Optical Network
STF2System Interface Module
ULUnderwriters Laboratories
VA CVolts Alternating Current
VDCVolts Direct Current
VSWRVoltage Standing Wave Ratio
WDMWave Division Multiplex
WSPWireless Service Provider
This section describes the Digivance Neutral Host (NXD) Radio Access Node (RAN).
1.1General Description
The RAN, shown in Figure 1, is the remote component in the Digivance NXD Multi-Band
Distributed Antenna System. The RAN is a pole-mounted or pad-mounted, weather-resistent
cabinet, housing electronic modules that operate on an internal cPCI backplane. Included are a
central processing unit, a system interface, an optical interface, optical to RF data converters,
RF multicouplers, and DC power supplies. The RAN also houses rectifiers, backup batteries,
power amplifiers, and optical wave division multiplexers. Optical and RF functions are both
required because the RAN exchanges data with the system Hub using an optical link and
exchanges data with wireless users using RF signals. Each RAN provides the system with an RF
antenna and can accommodate up to four bands (
RANs installed at the same location can accommodate up to eight bands using a common
antenna.
The NXD Distributed Antenna System (DAS), in which the RAN is the remote component, is a
multi-frequency, multi-protocol RF access network providing microcellular Cellular and PCS
coverage via a distributed RF access system. In a typical configuration, such as shown in
Figure 2, multiple RANs are connected to a central Hub where multiple Base Transceiver
Station (BTS) interfaces are located. Signals received at the Hub are distributed to the RANs in
digital form by way of a fiber optical link. Within the RANs, the signals are converted from
digital to RF format to be transmitted from the RAN antennas. Signals also travel in a reverse
direction, from the RANs to the Hub, with a reverse data conversion.
Physically, the DAS consists primarily of electronic modules located in the Hub and RANs. At
the Hub, these modules are mounted in an equipment rack typically housed in a common
telecommunications structure with the base station electronics for Wireless Service Providers
(WSPs), either in the same room or nearby. These modules include high power attenuators, base
station modules, a power distribution unit, an Ethernet hub, a Hub reference module, an RF
chassis, and one or more digital chassis. The RAN electronic modules, mounted in the RAN
cabinet, perform the remote system functions of optical to RF data conversion and RF access.
These modules are described in subsequent topics within this product description. Digivance
Element Management System (EMS) software, running on a computer located at the Hub,
provides a graphical user interface to monitor system performance.
The RAN consists of the main components shown in a high-level view in Figure 3. These
components include:
• RAN Cabinet: exterior shell of the RAN containing cable connection points, ground
studs, and slots or shelves supporting other RAN components.
• RAN Chassis: standard Compact PCI (cPCI) shelf capable of housing 21 industry
standard cPCI circuit card modules. The modules are plugged into a common backplane
providing data bussing between them.
• Related Electronics: including rectifiers, Power Amplifier Assemblies (PAAs), batteries,
multiplexers, and a circuit breaker panel.
All components called out in the figure except for the multiplexers are separately installable in
the field. In most cases, however, the RAN is shipped with a basic set of components having
been ordered in advance by the customer and installed in the factory.
The RAN user interface consists of the various connectors, fittings, mounting slots, power
cords, switches, and indicators that are of relevance to the user in installation and operation
procedures. The user interface is shown in Figure 4 and described in Tabl e 1.
Automatic gain control
Detector integration time
Attack time
Decay time
Gain control range
Gain in series with BTS-10 to +10 dBLower limit for simulcast with a
Gain parallel to BTS0 to +30 dBAllows injection after BTS
Gain stability+/- 2dBOver temperature, frequency, and
System Bandwidth
Forward Path
Reverse Path
Impedance50 ohm
Output Power
Cellular/SMR 10 Watt MCPA
PCS 20 Watt MCPA
Gain resolution1 dB
Gain measurementConfigured at startup using fac-
10 usec
0 usec
0 usec
30 dB
15 MHz block increments
15 MHz block increments
6.5 Watts (+38 dBm) composite
12.5 Watts (+41 dBm) composite
Activated if A/D clips, changes
gain of A/D and gain in digits.
Design ensures analog gain and
digital gain change will be timed
correctly. 15 dB noise figure at
-14 dB gain
host tower site, the max reduces
effect of cascaded noise figure
amplifiers
aging valid for input signals
below AGC threshold
At antenna port
At antenna port
tory calibration of modules and
user data
Note: 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 cause
interference to adjacent band users. The power reduction is to be by means of input power
or gain reduction and not by an attenuator at the output of the device.
1.6RAN Cabinet
The RAN cabinet is a NEMA-3R enclosure designed to protect its electronic components from
weather and human tampering. The cabinet is weather-tight but contact with salt-air mist should
be avoided as it may decrease the mean time between failure of some components. The cabinet
has ventilation openings to allow entry of cool air and escape of hot air. The cabinet provides
termination points for the coaxial antenna cable, fiber optic cable, ground cable, and AC cable.
The cabinet has inbuilt AC power surge protection and limited storage for fiber optic cables.
1.6.1Mounting
The RAN cabinet may be mounted on a wood pole or on a concrete pad. Mounting bracket kits
(available from ADC) are required for each type of installation.
1.6.2Fiber Optic Cable Entry
A nylon connector is provided on the rear of the RAN cabinet for routing a fiber optic cable into
the cabinet. The cord connector provides cable strain relief and a watertight seal at the fiber
optic cable entry point. As the connector nut is tightened, a soft neoprene bushing compresses to
tightly grip the cable without applying excessive force to the fibers. The connector
accommodates cables of a diameter in the range .38 to .50 inches (.97 to 1.27 cm).
Note: If the installer has a larger cable, the manufacturer (Hubbell Inc.) makes bushings
that fit this connector in the following size ranges: .500-.625, .625-.750, .750-.875, .875-
1.00, 1.00-1.125 inches.
In a typical installation, the connectorized end of a multi-fiber OSP cable is routed into the
cabinet through the cord connector and the individual fibers are connected to the optical
transceiver on the Synchronous Interface Card (SIF). Excess slack is stored inside the cabinet.
The stub end of the cable is routed to an external splice enclosure (not provided) for splicing to
the outside plant fiber optic cable.
1.6.3Antenna Cable Connections
Five N-type plugs are provided on the rear of the RAN cabinet for connecting the antenna
coaxial cables. On the inside of the cabinet, coaxial jumper cables (included with the cabinet)
are used for connecting to the antenna port on the appropriate multiplexer.
1.6.4AC Power Wiring Entry and Grounding
The NXD RAN uses 240 VAC power. A one inch (2.54 cm), 90 degree rigid elbow conduit
fitting is provided on the rear of the cabinet. The conduit should be routed to an external
junction box (not provided). It is suggested that an external AC outlet (not provided) be installed
near the cabinet to power test equipment and power tools. The AC source should supply 50/60
Hz, single-phase power through a circuit breaker rated at 20 Amps.
1.6.5Ventilation
Ventilation openings are provided in the front door of the RAN cabinet to permit entry of air for
cooling. A filter removes dirt particles so that only clean air enters the cabinet. The heated air
exits the cabinet through the rear side. The four PAAs are each equipped with three cooling fans
that pull air through the module and exhaust it to the rear of the cabinet. A fan assembly at the
top of the RAN chassis forces the air out the rear side of the cabinet.
The RAN chassis, shown in Figure 6, is a standard Compact PCI (cPCI) shelf capable of
housing 21 industry standard cPCI circuit cards (called “electronic modules” in this manual).
The backplane supports the basic cPCI functions and it has been extended to allow the routing
TM
of DIF
cooling fans within the Fan Access Panel on the top of the chassis. Tab le 3 identifies the
electronic modules using the callout reference numbers from Figure 6.
, reference clocks and I2C signals between I2C modules. The RAN chassis also houses
12367891045
REF # MODULE NAMEFOR DETAILS REFER TO
1cPCI Power SuppliesSection 1.7.1 on Page 12
2Central Processing Unit (CPU)Section 1.7.2 on Page 13
3System Interface (STF2)Section 1.7.3 on Page 14
4Synchronous Interface (SIF)Section 1.7.4 on Page 15
5Small Form-Factor Pluggable Optical Transceiver (SFP)Section 1.7.5 on Page 17
6RAN Down Converter (RDC or RDC2)Section 1.7.6 on Page 17
7RAN Up Converter (RUC2.X or RUC3)Section 1.7.7 on Page 19
8800 MHz Multi-CouplerSection 1.7.9 on Page 20
91900 MHz Multi-CouplerSection 1.7.10 on Page 22
10Fan Access PanelSection 1.7.8 on Page 20
Figure 7 is a schematic showing the data flow in the RAN chassis, as represented by the PCS-A
band. As shown, data flows in two directions, from the Hub through the RAN to the antenna,
and from the antenna through the RAN back to the Hub. In each direction, data conversion
occurs, with optical data “upconverted” to RF data in the up direction in the schematic, and RF
data “downconverted” to optical data in the down direction. In an up direction, the RUC module
converts Digitized Intermediate Frequency (DIF) data into PCS, Cellular, and SMR frequency
RF bands. The RF signals are amplified and then transmitted from the RF antenna. In the down
direction, the RDC module converts PCS, Cellular, and SMR frequency bands into DIF data.
The overall series of events is managed by the CPU using an Ethernet connection to the chassis
backplane.
RAN
MB
ANT
1900-P1900-D
ANT
PCS QUADPLEXER
AB FRX
MCPA
RF
RUC RDC
DIF
SIF
Fiber Fiber
ANT
PCS QUADPLEXER
DECRX
PriDiv
1900
MUL
66
PriDiv
DIF
DIF
Ethernet
RAN = Radio Access Node
DIF = Digital Intermediate
Frequency
SIF = Synchronous Interface
RUC = RAN Up Converter
MCPA = Munti-Carrier Power
Amplifier
MB ANT = Multi Band Antenna
MUL = Multi-Coupler
RDC = RAN Down Converter
The Compact PCI (cPCI) Power Supply Modules provide +/-12V, 5V, and 3.3V DC power to
the cPCI backplane for use by the cPCI electronic modules. Each RAN requires one power
supply module. Two modules can be used to provide redundancy if desired. These modules are
hot swappable. Figure 8 shows the cPCI Power Supply Module faceplate. Table 4 describes the
faceplate components called out in the figure.
The Central Processing Unit (CPU) Module is a cPCI-based, single-board x86 computer with
disk running on a Linux operating system. Each RAN chassis has one CPU module. The CPU
runs a process management program that manages all RAN hardware including RF and digital
equipment. The program also manages RF signal gain and monitors signal presence and quality.
Figure 9 shows the CPU module faceplate. Tab le 5 describes the faceplate components called
out in the figure.
VIDEO
7
CONNECTOR
ETHERNET
6
CONNECTOR
ACTICITY
5
4
LEDs
RESET
BUTTON
21251-A
UNIVERSAL
SERIAL BUS
CONNECTOR
COM 1
CONNECTOR
STATUS
LEDs
3
1
2
Figure 9. CPU Module Faceplate
CPU
Table 5. CPU Module Faceplate Components
REF #DESIGNATIONDEVICEFUNCTIONAL DESCRIPTION
1USB1USB connectorFront panel input/output for USB connectivity
2COM 1RJ-11C connectorFront panel interface for COM1
3(Unmarked)Status LEDsLED 1 is POST (red on start-up, turns green on
successful completion of start-up self test); LED 2
& 3 are undefined; LED 4 (blinking green) indicates
4RSTRecessed switchReset. Used to manually reset the CPU
5POSTSingle-color LEDs
(yellow)
Post. Top four LEDs give status of CPU during initial
boot process; bottom four give board operation status
6ENETRJ-45 connector with
single-color LEDs (green
and yellow)
Ethernet. 10 BaseT. Connects to RJ-45 connector on
SIF module (10BT port) using cable 1001478P001.
Connection status (green) and 100 BT (yellow)
7VIDEO15-PIN VGA connectorVideo. Not used by Digivance system
1.7.3System Interface (STF2) Module
The System Interface (STF2) Module is a cPCI electronic module that provides the CPU and
other electronic modules with the ability to communicate with one another using the four I2C
buses on the cPCI backplane. One STF2 is used per RAN. The STF2 also has the GPS antenna
input port located in the center of the module faceplate. STF2 modules are specified according
to the number of qualifying communications devices being utilized. Tab le 6 describes the
module faceplate components. Figure 10 shows the location of the faceplate components.
Table 6. System Interface Module Faceplate Components
REF #DESIGNATIONDEVICEFUNCTIONAL DESCRIPTION
1RSTRecessed switchReset. Used to halt operation of the CPU operating system. A
power ON reset is required to restart the CPU
2STATUS 1Single-color LED
(yellow)
3STATUS 2Single-color LED
(yellow)
Reserved for future use. Indicator turns yellow when the CPU is
not installed or has malfunctioned
Reserved for future use. Indicator turns yellow when the CPU is
not installed or has malfunctioned
4STATUS GPSSingle-color LED
(green)
Indicator showing that 1PPS signal is available. Led toggles once
per second (RAN only)
5DARJ-45 connectorDoor Alarm. Input using cable 1001474P001; small LED on this
connector lights (red) when door is open
6GPSRJ-45 connectorNot used
7RECTRJ-45 connectorRectifier. Communications to rectifier using cable 1001476P001