Tài liệu Digivance® pdf

w w w . a d c . c o m • + 1 - 9 5 2 - 9 3 8 - 8 0 8 0 • 1 - 8 0 0 - 3 6 6 - 3 8 9 1
Spec Sheet
Digivance
®

Long-Range Coverage Solution 800, 1900 and
Dual-Band 800/1900 MHz Systems
Digivance
®
– ADC’s Digital Advantage for Improving Wireless Capacity,
Coverage and Customer Retention
ADC, a leading solution provider for distributing and enhancing wireless capacity and coverage,
offers the Digivance
®
Long-Range Coverage Solution (LRCS). The LRCS improves wireless
networks by extending seamless wireless coverage from existing cell sites to hard-to-reach areas or
distributing capacity from centralized radio suites. As part of the Digivance family of digital radio
frequency (RF) transport solutions, LRCS is fully compatible with ADC’s Digivance Indoor Coverage
Solution (ICS). The Digivance family offers flexible, scalable solutions to fit various applications from
a single building to a campus to a large city center area and beyond.
Digivance
®
– 800, 1900 and Dual-Band 800/1900 MHz System Solutions
The LRCS provides a platform for transporting and distributing both 800 and 1900 MHz wireless
capacity from base stations to remote sites such as dense urban areas, canyons, tunnels, highways
and large open facilities. It allows radio capacity to be centralized in base station hotels, which can
be inexpensively located up to several miles away from the desired area, making more effective use
of capital expenditure and reducing annual operating costs.
The dual-link 800/1900 MHz system affords service providers the flexibility to either overlay a 1900
MHz network or to grow an existing 800 MHz network with 1900 MHz deployment capability
when needed. The LRCS also enables service providers to add radios to meet ever growing capacity

needs without any upgrade to the Digivance system.
Features:
• Flexible architecture enables macro network
coverage to be distributed over individual or
multiple point-to-point optical RF transport
links
• Digital platform enables transition to new
capabilities such as free space optics links
and coarse wavelength division multiplexing
(CWDM)
• Digital RF transport is virtually transparent
to air modulation standards; e.g., CDMA,
iDEN
®
, GSM, TDMA, 1xRTT, 1xEU-DO, etc.
• Remote alarm monitoring from the
network operations center (NOC) reduces
troubleshooting time
• Local alarm networking of multiple systems
for monitoring and control
• Dual-link cabinet services both 800 and
1900 MHz networks in one outdoor
enclosure
• 800 or 1900 MHz electronics can be
deployed separately, allowing a pay-as-you-
grow approach to network overlays
Single-Band Cabinet LRCS Dual-Band Cabinet LRCS
8 / 0 6 • 1 0 2 9 8 0 A E
Digivance
®

800/1900 MHz Systems
2
w w w . a d c . c o m • + 1 - 9 5 2 - 9 3 8 - 8 0 8 0 • 1 - 8 0 0 - 3 6 6 - 3 8 9 1
Digivance
®
LRCS 800, 1900 and Dual-Band 800/1900 MHz Systems
Overview
With the increasing popularity of wireless devices,
subscribers expect to have coverage at any time,
in any place. This requires service providers to
increase capacity and coverage, which is typically
done by adding new cell sites. However, with
city center areas becoming more congested and
local government zoning regulations becoming
increasingly more stringent, obtaining permits for
new wireless cell sites is becoming increasingly
more difficult. Extending service to these hard-
to-reach areas can be quite challenging. ADC’s
LRCS is a cost-effective solution for extending or
distributing capacity from base stations to areas
that require coverage.
Application
The LRCS is the only long-range RF distribution
solution to offer a fully digital platform. Using
patented digital RF transport technology, the
LRCS digitizes the entire designated RF band,
digitally transports it over fiber, and reconstructs
the signal at full bandwidth, regardless of
modulation technology or data rate. Digital
RF transport allows the signal to be replicated

at full dynamic range, regardless of the fiber
length, which increases the capability for
data throughput. As advanced high-data rate
broadband services are rolled out, networks with
a LRCS backbone will be ready.
The LRCS offers a flexible architecture to
distribute wireless capacity. Its versatility and small
size allow service providers to quickly deploy
networks in dense urban areas, where zoning
restrictions often hinder installation of base
stations.
ADC offers a single- and dual-band system, which
can be deployed with either 800 or 1900 MHz
electronics. When deploying a dual-band system,
the other frequency can be deployed when
needed, thus allowing service providers to defer
capital expenditures until absolutely necessary.
Centralization of base station
capacity can also be realized
using the LRCS, allowing service
providers to further benefit by
reducing capital expenditures
and annual operating costs.
ADC's digital RF transport
technology accommodates
enhancements such, as
free space optical laser and
millimeter wave links instead of physical fiber
connections and xWDM capabilities. The xWDM
option allows multiple transmit and receive

paths over a single fiber cable, thus reducing
annual fiber lease costs. Free space optical laser
links and millimeter wave solutions overcome
fiber availability issues, as well as enable service
providers a means to deploy wireless capacity in
specific dense urban areas in just days.
System Description
The LRCS optically transports digitized RF signals
to difficult coverage areas such as tunnels,
canyons, large open structures such as stadiums,
and congested city center locations. One point-
to-point RF transport link consists of a Host
Unit, Remote Unit, and element management
software.
The LRCS Host Unit is typically rack-mounted
at the base transceiver station (BTS) site or
collocated with other Host Units at a centralized
radio suite. The RF signal is transported digitally
over two fiber optic cables that connect the
Host Unit and Remote Units. Optionally, the
wave division-multiplexing (WDM) feature allows
transport over a single fiber. In either application,
the link can also be configured for diversity
operation, which requires an additional fiber. The
LRCS Remote Unit is positioned near the area
requiring coverage (up to several kilometers from
the Host Unit) and interfaces with an antenna to
distribute the RF signal. The distance between the
LRCS Host Unit and Remote Unit is limited only
by time delay requirements of system modulation

standards; i.e., iDEN
®
, GSM, CDMA, TDMA,
1xRTT, 1xEU-DO, etc.
Multiple LRCS links can be readily deployed
as a system to distribute capacity and provide
coverage to larger areas, such as an entire city
center area. The Digivance Element Manager
System (EMS) provides operational and
maintenance capabilities for up to 24 Digivance
LRCS links.
Digivance LRCS Host UnitsBase Station
BTB
Sector Alpha
Sector Beta
Sector Gamma
OSP Fiber Pairs
Alpha
Omni-Cell
Alpha
Omni-Cell
Digivance LRCS
Remote Unit
Alpha
Omni-Cell
8 / 0 6 • 1 0 2 9 8 0 A E
Digivance
®
800/1900 MHz Systems
3

w w w . a d c . c o m • + 1 - 9 5 2 - 9 3 8 - 8 0 8 0 • 1 - 8 0 0 - 3 6 6 - 3 8 9 1
Host Unit
The rack-mountable LRCS Host Unit is typically
located at a remote BTS or a facility building
housing a suite of base stations near the area
requiring coverage. On the forward path, the
Host Unit digitizes the designated RF band and
digitally transports it over singlemode fiber to the
Remote Unit. On the reverse path, the Host Unit
receives the digitized signal and converts it to
RF. The Host Unit also collects alarm information
from the Remote Unit.
For system deployments, multiple links can be
networked together at the same BTS site. Host
Units can be daisy-chained together to allow
monitoring and control of multiple links from
a single user interface. Local monitoring and
control functions can be performed either directly
through the Host Unit or via a PC.
Remote alarm monitoring and control of the
LRCS system can also be performed from an
off-site location or NOC. Communications to
the NOC can be performed using a PC with a
standard physical layer protocol. In addition to
sending alarm notifications to the EMS through
software, the LRCS Host Unit also features front
panel alarm reporting. LEDs on the front panel
of the Host Unit will change color depending
on the status of the unit. LED displays provide
information regarding the following items:

• Power
• Mode of system (active/standby)
• Indicate which unit is at fault
• RF conditions
Furthermore, alarm contact closures provide
major and minor alarms. The Host Unit has two
alarm contacts that either report system operation
is seriously affected (major alarm) or system
operation is degraded (minor alarm). The Host
Unit operates on DC power.
Remote Unit
The LRCS Remote Unit is an outdoor cabinet
that is either pole-mounted or mounted on the
side of a building. On the forward path, the
Remote Unit receives the digitized signal from
the Host Unit and converts the signal back into
RF to be distributed via an externally mounted
antenna. On the reverse path, the Remote Unit
digitizes the designated RF band and digitally
transports it over singlemode fiber to the Host
Unit. In addition to sending alarm notifications
to the EMS through software, the LRCS Remote
Unit also features front panel Remote Unit will
change color depending on the status of the unit.
LED displays provide information regarding the
following items:
• Power
• Mode of system (active/standby)
• Indicate which unit is at fault
• RF conditions

• Power amplifier fault
• Antenna fault
Furthermore, alarm contact closures provide a
final level of alarming capability at the Remote
Unit. Major and minor alarms are reported
through these contact alarm closures. The
Remote Unit is powered by an AC source.
Digivance
®
LRCS 800, 1900 and Dual-Band 800/1900 MHz Systems
8 / 0 6 • 1 0 2 9 8 0 A E
Digivance
®
800/1900 MHz Systems
4
w w w . a d c . c o m • + 1 - 9 5 2 - 9 3 8 - 8 0 8 0 • 1 - 8 0 0 - 3 6 6 - 3 8 9 1
Digivance
®
LRCS 800, 1900 and Dual-Band 800/1900 MHz Systems
Alarming and Management System
ADC's Digivance EMS provides operational
and maintenance capability for the
LRCS. The Digivance EMS consists of a
personal computer (PC) using a Windows
®

operating system, ADC furnished Java-
based software package; an ASCII based
RS-232 capable terminal, and RS-232
cables.

The EMS can simultaneously monitor a
network of LRCS links by daisy-chaining
the alarm interfaces of up to 24 LRCS
Host Units. Each of the Host Units
are connected through a controller
area network bus, and the PC can be
connected to any of the Host Units. The
EMS has the ability to download software,
change parameters, and monitor alarms.
The EMS provides three levels of alarms:
software reporting, LEDs and external contacts.
Using a laptop PC, the EMS can also be used
for field test and troubleshooting at each
Remote Unit. Additionally, off-site functionality
is accomplished through a terminal at the NOC
using a PC with a standard physical layer protocol
for the communications.
ADC offers a complete EMS hardware
and software turnkey solution to element
management, as well as a software solution,
where operators utilize their existing element
management network.
Host Site Capabilities
The EMS performs the following functions at the
host site:
• Provides real-time information regarding faults
• Displays various system level values

(voltages, RF, power, etc.)
• Records and generates history reports

with time and date stamps
• Adjusts performance related parameters
of the Host Unit and Remote Unit
• Permits placement of Host Unit and
Remote Unit into standby mode
• Allows download of new software
versions to the Host Unit and Remote
Units
Off-Site Capabilities
The EMS performs the following functions at off-
site locations such as the NOC:
• Provides real-time information regarding faults
• Displays various system level values (voltages,
RF, power, etc.)
• Adjusts performance-related parameters of the
Host Unit and Remote Unit
• Permits placement of Host Unit and Remote
Unit into standby mode
The EMS provides real-time data to the operator
at the NOC through an ASCII-based, RS-232-
capable terminal. The ASCII terminal at the NOC
communicates to the PC at the host site through
an RS-232 port.
In addition, the operator has the ability to
remotely access the EMS over Ethernet, RS-232 to
Ethernet connection.
NOC
ASCII Terminal
Host Site
Host

Unit
1
Host
Unit
2
Host
Unit 24
Site Manager:
• EMS
• SNMP
Up to
20 km
or more
Up to
20 km
or more
Up to
20 km
or more
Remote
Unit 1
Remote
Unit 2
Remote
Unit 24
8 / 0 6 • 1 0 2 9 8 0 A E
Digivance
®
800/1900 MHz Systems
5

w w w . a d c . c o m • + 1 - 9 5 2 - 9 3 8 - 8 0 8 0 • 1 - 8 0 0 - 3 6 6 - 3 8 9 1
Digivance
®
LRCS 800, 1900 and Dual-Band 800/1900 MHz Systems
FORWARD PATH
System Bandwidth:


Frequency Range:

Gain:
Out-of-band Rejection:
Intrinsic Hardware Delay:
Dynamic Range:
Peak to Average Ratio:
Intermodulation:
RF Input Level:
TX Insertion Loss:
Output Power:
Error Vector Magnitude (EVM)
REVERSE PATH
System Bandwidth:


Frequency Range
Gain:
Out-of-band Rejection:
Intrinsic Hardware Delay:
Intermodulation:
Noise Figure:

Maximum RF Output Level:

Dynamic Range (blocking):
Error Vector Magnitude (EVM):
800 MHz
12.5 MHz (Digitization bandwidth and
duplexer bandwidth are ≥12.5 MHz)
869-880 & 890-891.5 MHz (A Band)
880-890 & 891.5-894 MHz (B Band)


85 dB (Adjustable)
-40 dB, bandwidth 35 MHz
2.4 microseconds (excluding fiber)
-60 dBc
>10 dB
- 55 dBc at remote output (two tone)
- 40 to -9 dBm Composite
2.5 dB
50 watt at PA output; 30 watt at
antenna port
7% (TDMA/EDGE)
4° (GSM)
0.98 rho factor (CDMA)
12.5 MHz (Digitization bandwidth and
duplexer bandwidth are ≥12.5 MHz)

824-835 & 845-846.5 MHz (A Band)
835-845 & 846.5-849 MHz (B Band)
30 dB (Adjustable)

-40 dB, bandwidth 35 MHz
2.4 microseconds (excluding fiber)
-62 dBc at Host Output (Two Tone)
5 dB Typical
-10 dBm Composite
70 dB
7% (TDMA/EDGE)
4° (GSM)
0.98 rho factor (CDMA)
1900 MHz
25 MHz; AD Sub Band is 20 MHz
(Digitization bandwidth and duplexer
1930 to 1950 MHz (AD Sub Band)
1945 to 1970 MHz (DBE Sub Band)
1950 to 1975 MHz (BEF Sub Band)
1965 to 1990 MHz (EFC Sub Band)
83.5 dB (Adjustable)
-40 dB, bandwidth 35 MHz
2.4 microseconds (excluding fiber)
-60 dBc
>10 dB
- 55 dBc at remote output (two tone)
- 40 to -9 dBm Composite
2.5 dB
40 watt at PA output; 25 watt at
antenna port
7% (TDMA/EDGE)
4° (GSM)
0.98 rho factor (CDMA)
25 MHz; AD Sub Band is 20 MHz

(Digitization bandwidth and duplexer
bandwidth are ≥25MHz)
1850 to 1870 MHz (AD Sub Band)
1865 to 1890 MHz (DBE Sub Band)
1870 to 1895 MHz (BEF Sub Band)
1885 to 1910 MHz (EFC Sub Band)
30 dB
-40 dB, bandwidth 35 MHz
2.5 microseconds (excluding fiber)
-62 dBc at Host Output (Two Tone)
5 dB Typical
-10 dBm composite with Maximum
Remote Input
70 dB
7% (TDMA/EDGE)
4° (GSM)
0.98 rho factor (CDMA)
SPECIFICATIONS
800 MHz Cellular Band (50W)
RF

Channel

Composite
Per RF
Carrier

Composite
Per RF
Carrier

1 45.5 dBm 45.4 dBm 35.0 Watts 35.0 Watts
2 45.5 dBm 42.4 dBm 35.0 Watts 17.5 Watts
4 45.5 dBm 39.4 dBm 35.0 Watts 8.8 Watts
8 45.5 dBm 36.4 dBm 35.0 Watts 4.4 Watts
16 45.5 dBm 33.4 dBm 35.0 Watts 2.2 Watts
Output Power per Carrier Chart (Power Remains the Same Across All Modulations):
1900 MHz PCS Band (40W)
RF

Channel

Composite
Per RF
Carrier

Composite
Per RF
Carrier
1 43.8 dBm 43.8 dBm 23.8 Watts 23.8 Watts
2 43.8 dBm 40.8 dBm 23.8 Watts 11.9 Watts
4 43.8 dBm 37.7 dBm 23.8 Watts 6.0 Watts
8 43.8 dBm 34.7 dBm 23.8 Watts 3.0 Watts
16 43.8 dBm 31.7 dBm 23.8 Watts 2.2 Watts