Tài liệu Digivance® Street-Level Coverage Solution (SCS) 800/900 ESMR,1900 MHz and 800/900 ESMR, 1900 MHz Tri-Band Systems ppt

www.adc.com • +1-952-938-8080 • 1-800-366-3891
SPEC SHEET
Digivance
®
Street-Level Coverage Solution (SCS) 800/900 ESMR,1900 MHz
and 800/900 ESMR, 1900 MHz Tri-Band Systems
ADC’s Digivance
®
Street-Level Coverage
Solution (SCS) helps wireless service providers
improve capacity in areas where restrictive
zoning requirements prohibit deployment of
traditional base station network equipment.
The SCS distributed antenna system (DAS)
utilizes patented digital RF transport-over-
fiber technology to distribute wireless
service between existing cell sites and SCS
remote antenna units. The small-form-factor,
environmentally hardened, Remote Units
offer multiple mounting options that easily
blend into the existing environment. The
maintenance-free remote enclosure makes the
SCS ideal for improving capacity in hard-to-
access and challenging environmental areas
such as tunnels, subways, and urban canyons.
Features:
• Supports 800/900 SMR and 1900 PCS
• Up to 25 MHz continuous bandwidth per
system
• Single- or dual-system packaging
• Virtually maintenance-free operation with

an environmentally sealed unit
• Industry’s highest available optical loss
budget of 25 dB
• Digital transport is virtually transparent to
RF modulation standards; e.g., iDEN
®
, GSM,
CDMA, W-CDMA, 1xEV-DO, and HSDPA
• All-digital transport enables transition to
optional capabilities such as free space
optics, millimeter wave links and wavelength
division multiplexing (xWDM)
• Remote Unit features integrated WDM to
minimize point-to-point fiber requirements
• Remote Unit is a sealed NEMA 6/IP-67 rated
enclosure
• Remote Units mount vertically or horizontally
- inside pole, pole wrap, wall-mount, strand-
mount and optional sub-terrain vault
• Remote alarm monitoring with SNMP
support and status LED at Remote Unit
• Local alarm networking of multiple systems
for monitoring and control
• Ease of installation
12/06 • 103277AE
Digivance
®
Street-Level Coverage Solution
2
www.adc.com • +1-952-938-8080 • 1-800-366-3891

Digivance
®
SCS 800/900 ESMR,1900 MHz and 800/900 ESMR, 1900 MHz Tri-Band Systems
Overview
With increased popularity and reliance on wireless
devices, subscribers expect to have service 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 centers becoming more congested and
local government zoning regulations becoming
more stringent, obtaining permits for new
wireless cell sites are becoming increasingly more
difficult. Extending service to these hard-to-reach
areas often requires overcoming major zoning
challenges. The SCS is a cost-effective solution
for extending or distributing capacity from base
stations to other areas that require coverage.
Application
Digivance is the only all-digital DAS available
today. By using patented technology, the SCS
digitizes the entire designated RF band, digitally
transports it over fiber, and reconstructs the
signal at full bandwidth, regardless of modulation
technology. Digital RF transport allows the
signals to be replicated at full dynamic range,
independent of the fiber length, which improves
data throughput. As advanced, high data-rate
broadband services become available, networks
with ADC’s SCS technology will be ready.

ADC’s digital RF transport technology
accommodates enhancements such as free space
optical laser links, millimeter wave links and
xWDM capabilities. The xWDM option allows
multiple transmit and receive paths over a single
fiber strand, potentially
reducing annual fiber lease
costs. Free space optical laser
links and millimeter wave
solutions can often overcome
fiber availability issues where
line of sight exists.
The SCS offers all
the benefits of digital
technology in a
maintenance-free, compact
Remote Unit. Its versatility
and small size allow service
providers to quickly deploy
networks in challenging
service areas.
Centralization of base
station capacity can also
be realized using the SCS.
This allows service providers to further benefit
by reducing capital expenditures and annual
operating costs. Base station radio capacity may
be simulcast to multiple remotes by using RF
splitting and combining capabilities. The SCS is a
cost effective way to solve coverage and capacity

problems without assuming the capital expense
and time it takes to deploy additional cell sites.
System Description
The SCS optically transports digitized RF
spectrum to difficult coverage areas such
as congested city center locations, tunnels,
and canyons. A single-band point-to-point
RF transport link consists of a Host Unit and
corresponding Remote Unit.
The SCS Host Unit is typically rack-mounted
at the base transceiver station (BTS) site or
collocated with other Host Units at a centralized
base station radio (BR) suite. The RF spectrum
is transported digitally over fiber optic cable
connecting the host to a SCS Remote Unit.
The SCS Remote Unit is positioned at the area
requiring coverage and interfaces with an
antenna to distribute the RF signal. The distance
between the SCS Host Unit and Remote Unit
is typically limited only by protocol response
time delay requirements of system modulation
standards (iDEN
®
, GSM, CDMA, W-CDMA,
1xEV-DO, and HSDPA, etc.), and can be as far
as several kilometers. With the product’s 25 dB
optical budget, the SCS can be deployed in the
most challenging fiber plants.
Dual-band Enclosure
Dual-WDM

1310nm and 1550nm
Host Unit 1900 MHz
Host Unit 800/900 MHz
RF interface panel
EMS or SNMP
RX TX
Wireless
Base Station
Internal WDM
One fiber per band
RF Signals
Coax Cable
Internal diplexor to
one RF output
Optional external
UPS/battery backup
Antenna
Antenna Standoff
Dual-band enclosure with two frequency bands
12/06 • 103277AE
Digivance
®
Street-Level Coverage Solution
3
www.adc.com • +1-952-938-8080 • 1-800-366-3891
Host Unit
The rack-mounted SCS Host Unit is typically
located at a BTS or a facility housing a suite of
BTSs. On the forward path, the Host Unit digitizes
the designated RF band and digitally transports

it over singlemode fiber to the SCS 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.
Remote alarm monitoring and control of the
SCS can be managed from an off-site location
or NOC. Using a standard PC with a standard
physical layer protocol, communications can be
delivered to the NOC. In addition to sending
alarm notifications to the Digivance EMS through
software, the SCS 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
• System mode (active/standby)
• Indication of faulty unit
• 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 small-form-factor SCS Remote Unit minimizes
visual pollution and offers multiple mounting
options that easily blends into the environment.
Mounting options for the single- and dual-system
remotes include inside pole-mount, pole-wrap,
wall-mount, strand-mount and sub-terrain vault-
mount capabilities. The Remote Units can be
mounted in a vertical or horizontal position often
in less than five minutes and are sealed NEMA
6/IP-67 rated enclosures that can be deployed
in very harsh environments. Fiber, antenna, and
power input/output connectors are all sealed for
maximum protection.
For installations in areas with significant solar
load, ADC offers a solar shield shroud to protect
the SCS.
On the forward path, the Remote Unit receives the
digitized spectrum from the Host Unit and converts
the spectrum back into RF to be distributed
via an externally mounted antenna system. 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 software, the SCS Remote Unit also
features LED alarm reporting. An LED on the
bottom of the Remote Unit will illuminate upon
a fault condition.

Digivance
®
SCS 800/900 ESMR,1900 MHz and 800/900 ESMR, 1900 MHz Tri-Band Systems
12/06 • 103277AE
Digivance
®
Street-Level Coverage Solution
4
www.adc.com • +1-952-938-8080 • 1-800-366-3891
Alarming and Management
ADC's Digivance
®
Element Management
System (EMS) provides operational and
maintenance capability for the SCS. The
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 SCS links by daisy-chaining
the alarm interfaces of up to 24 SCS
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.
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.
Digivance
®
SCS 800/900 ESMR,1900 MHz and 800/900 ESMR, 1900 MHz Tri-Band Systems
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
12/06 • 103277AE
Digivance
®
Street-Level Coverage Solution
5
www.adc.com • +1-952-938-8080 • 1-800-366-3891
Digivance
®
SCS 800/900 ESMR,1900 MHz and 800/900 ESMR, 1900 MHz Tri-Band Systems
Specifications
RF SPECIFICATIONS
Bandwidth Capacity:
Frequency Bands
SMR 800/900 Band:

PCS AD Band:

PCS DBE Band:
PCS BEF Band:
PCS EFC Band:
Forward/Reverse Gain:
Gain Adjustment Range:
Intermodulation:
Self Generated Spurious Emissions:
Blocking Dynamic Range:
Peak to Average Ratio:
PROPAGATION DELAY
800/900 ESMR:
Adjustable Delay Setting:
Delay Setting Adjustments:
RF Input Level:
Output Power:
REVERSE PATH NOISE FIGURE
SMR:
Maximum Reverse RF Output Level:
ALC Range:
PERFORMANCE MERIT FUNCTIONS
TDMA and GSM/EDGE:
GSM:
iDEN
®
:
CDMA:
Forward Path
Single- and Dual-Band
Solutions Available
851 to 869 MHz and

935 to 940 MHz
1930 to 1950 MHz
1945 to 1970 MHz
1950 to 1975 MHz
1965 to 1990 MHz
78 +/- 3 dB at band center
30dB, in 1dB steps
≤ -52 dBc at remote output (two tone)
≤ -20 dBm (in-band)
>10 dB
<6 µsec (excluding fiber)
0 - 63 microseconds,
software adjustable
0.1 µsec
-40 to -9 dBm
Please see table below
7% EVM
4º RMS
SQE decrease < 1 dB
0.97 rho factor
Reverse Path
Single- and Dual-Band
Solutions Available
806 to 824 MHz and
896 to 901 MHz
1850 to 1870 MHz
1865 to 1890 MHz
1870 to 1895 MHz
1885 to 1910 MHz
30 +/- 2 dB at band center

30 dB, 1 dB steps
≥ 70 dB
<8 µsec (excluding fiber)
0 - 63 microseconds,
software adjustable
0.1µsec
-10 dBm
6 dB – ESMR/900
-10 dBm composite
-40 to –10 dBm peak
800/900 SMR (10W)
RF
Channel Composite
Per RF
Carrier Composite
Per RF
Carrier
1 38.1 dBm 38.5 dBm 6.5 Watts 6.5 Watts
2 38.1 dBm 35.1 dBm 6.5 Watts 3.2 Watts
4 38.1 dBm 32.1 dBm 6.5 Watts 1.6 Watts
8 38.1 dBm 29.1 dBm 6.5 Watts 0.8 Watts
16 38.1 dBm 26.1 dBm 6.5 Watts 0.4 Watts
Output Power per Carrier Chart (Power Remains the Same Across All Modulations):
1900 MHz Cellular Band (10W)
RF
Channel Composite
Per RF
Carrier Composite
Per RF
Carrier

1 37.7 dBm 37.7 dBm 5.9 Watts 5.9 Watts
2 37.7 dBm 34.7 dBm 5.9 Watts 3.0 Watts
4 37.7 dBm 31.7 dBm 5.9 Watts 1.5 Watts
8 37.7 dBm 28.7 dBm 5.9 Watts 0.7 Watts
16 37.7 dBm 25.7 dBm 5.9 Watts 0.4 Watts