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Digivance® Long-Range Coverage Solution 800/900, 1900 and Tri-Band 800/900 and 1900 MHz Systems 1900 MHz Host Unit Dual-Band Remote Cabinet for Tri-Band Solution 800/900 ESMR Host Unit 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 wireless coverage from existing cell sites to hard-to-reach areas or distributing capacity from centralized radio suites. The Digivance family offers flexible, scalable solutions to fit various applications from a single building to a campus to a dense urban center. Features: Flexible architecture enables macro network coverage to be distributed over individual or multiple point-to-point optical RF transport links: • All-digital transport enables transition to optional capabilities such as free space optics links and coarse wavelength division multiplexing (CWDM) • Digital RF transport is transparent to air modulation standards; e.g., iDEN®, GSM, CDMA, W-CDMA, 1xEV-DO • Remote alarm monitoring from the network operations center (NOC) reduces troubleshooting time • SNMP support • Local alarm networking of multiple systems for monitoring and control • Tri-band solutions within a dual cabinet, supports future band upgrade 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 800/900, 1900 and Tri-Band 800/900 and 1900 MHz Systems Overview With the increasing popularity and reliance on wireless devices, subscribers expect to have coverage at any time in any place they may be. This requires service providers to increase capacity, 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 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 other areas that require coverage. Application The LRCS is the only long-range RF distribution solution to offer a fully digital platform. By using patented 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. 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 are rolled out, networks with a LRCS backbone will be ready. ADC’s digital RF transport technology accommodates enhancements, such as free space optical laser links instead of physical fiber connections for even faster deployment and CWDM capabilities. The CWDM option allows multiple transmit and receive paths over a single fiber cable, potentially reducing annual fiber lease costs. Free space optical laser links and millimeter wave solutions overcome fiber availability issues. The LRCS offers a flexible architecture to distribute wireless capacity. Its versatility and small size allow service providers to quickly deploy networks in areas where zoning restrictions often hinder installation of base stations. Centralization of base station capacity can also be realized using LRCS. This allows service providers to further benefit by reducing capital expenditures and annual operating costs. System Description The LRCS transports digitalized RF signals to difficult coverage areas such as congested city center locations, tunnels and canyons. 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 enhanced base transceiver station (EBTS) site or co-located with other Host Units at a centralized base station radio (BR) suite. The RF signal is transported digitally over fiber optic cable connecting the Host Unit to a Remote Unit. The Digivance LRCS Remote Unit is positioned at the area requiring coverage and interfaces with an antenna to distribute the RF signal. The distance between the LRCS Host Unit and Remote Unit is limited mainly by time delay requirements of system modulation standards (iDEN®, GSM, CDMA, W-CDMA, 1xEV-DO, etc.), which is typically several kilometers. Alpha Omni-Cell Base Station Digivance LRCS Host Unit 110 VAC BTB Sector Alpha Sector Beta High Power Duplexer High Power Duplexer CWDM CWDM CWDM Digivance LRCS Remote Unit 110 VAC CWDM Alpha Omni-Cell Sector Gamma High Power CWDM Digivance LRCS Remote Unit Duplexer 48 VDC Alpha Omni-Cell 110 VAC CWDM Digivance LRCS Remote Unit 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 2 Digivance® LRCS 800/900, 1900 and Tri-Band 800/900 and 1900 MHz Systems Host Unit The rack-mountable LRCS Host Unit is typically located at an EBTS or a facility building housing a suite of EBTSs. 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 EBTS 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 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 • System mode (active/standby) • Indicate 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 LRCS Remote Unit is typically in 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 signals 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 software, the LRCS Remote Unit also features front panel alarm reporting. LEDs on the front panel of the Remote Unit will change color depending on the status of the unit. LED displays provide information regarding the following items: • Power • System mode (active/standby) • Indicate faulty unit • RF conditions • Power amplifier fault • Antenna fault system (VSWR) 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. 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 3 Digivance® LRCS 800/900, 1900 and Tri-Band 800/900 and 1900 MHz Systems Alarm and Management System ADC`s Digivance EMS provides operational and maintenance capability for the LRCS. The DigivanceEMS 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. NoC ASCII Terminal Remote Unit 1 Up to 20 km or more Remote Unit 2 Up to 20 km or more Remote Unit 24 Up to 20 km or more Site Manager: • EMS • SNMP host Site 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. 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 800/900, 1900 and Tri-Band 800/900 and 1900 MHz Systems SPECIFICATIONS 800/900 Mhz 1900 Mhz Forward Path System Bandwidth: 23 MHz 18 MHz – 800 Band 5 MHz – 900 Band 25 MHz; AD Sub Band is 20 MHz (Digitization bandwidth and duplexer 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 851 to 869 and 935 to 940 MHz 83.7 dB (Adjustable) -40 dB, bandwidth ≤30 MHz 6 microseconds (excluding fiber) -60 dBc 10 dB -60 dBc at remote output (two tone) -20 dBm at maximum attenuation 2.5 dB 35 watts at PA output; 23 watts at antenna port 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) 83.8 dB (Adjustable) -40 dB, bandwidth 35 MHz 2.5 microseconds (excluding fiber) -60 dBc 10 dB -55 dBc at remote output (two tone) -40 to -10 dBm 2.5 dB 40 watt at PA output; 25 watt at antenna port 7% (TDMA/EDGE) 4° (GSM) 0.98 rho factor (CDMA) System Bandwidth: 23 MHz 18 MHz – 800 Band 5 MHz – 900 Band 25 MHz; AD Sub Band is 20 MHz (Digitization bandwidth and duplexer bandwidth are ≥25MHz) Frequency range Gain: out-of-band rejection: Intrinsic hardware delay: Intermodulation: Noise Figure: ... - tailieumienphi.vn
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