Folder Fiberdas 3.indd

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FiberDAS The Fiber Optic Distributed Antenna System has been designed with and for the wireless industry to meet in-building system performance, monitoring, packaging and cost requirements. It is a flexible multiband, multi-user solution used to extend coverage into venues such as offices, arenas, shopping malls and campuses. The FiberDAS can be used in conjunction with repeaters, micro and macro base stations. - 850 MHz, 900 MHz, 1800 MHz, 1900 MHz and UMTS systems - Full band permits multicarrier/multiuser application - Designed for 4 dB optical loss (6 km run length) - Single mode fiber for easy installation - Easy installation is achieved with optical connectors and automatic gain leveling for true ”plug and play” functionality - Compatibility with any standard indoor coverage antenna Overview FiberDAS is a product that offers extended indoor coverage for mobile communication. It operates on 850 MHz, 900MHz, 1800 MHz, and 1900 MHz as well as the frequencies for UMTS. FiberDAS consists of a Hub Unit and up to 16 Remote Units linked to the Hub via optical fiber. The server antennas are connected to the Remote Units which are distributed throughout the building in a way that offers the desired coverage. Each Hub can support Remote Units for one or two frequency bands. Possible configurations for one FiberDAS system are for example 1 to 16 Remote Units for UMTS or 1 to 8 remote units for 900 MHz combined with 1 to 8 remote units UMTS. It is also possible to combine signals from several operators into one FiberDAS system or to use one Hub Unit for two sectors from the same base station. Input to the FiberDAS is an RF signal tapped off a base station or a repeater. Couplers, attenuators and splitters make up the Entry Shelf which needs to be designed for every installation separately. Hub Unit The Hub Unit consists of a 19 inch wide rack with a height of 3 HU. It can be placed in any suitable indoor area, preferably with close access to the base station or the repeater from which the RF input will be tapped. The Hub Unit is powered by 110 - 230 VAC. A back-up battery ensures 15-20 minutes of full operation in case of a power failure. There are eight slots for Plug-in Transceivers. Each Plug-in Transceiver can be connected to two Remote Units. One Hub Unit can support two different frequency bands. Hub Unit Functionality Within the Hub Unit the input RF signal from the base station or the repeater is split and distributed to the Plug-in Transceivers. In the Plug-in Transceiver the RF signal is first split in two, then translated to an optical signal (1310 nm) and finally sent via a single mode optical fiber to on or two Remote Units. The uplink signal returned from the Remote Units is translated back to RF, combined and made accessible on the ”RF Out” connectors on the Hub Unit rear panel. Hub Unit Input and Output The input RF signal from the base station or the repeater is connected to the Hub Unit via the ”RF In” N-connectors on the rear panel. If one input signal is used the Tx signal should be split and linked to both ”RF In” connectors. If two input signals are used (on different frequency bands) the different Tx signals should be linked to separate ”RF In” connectors. The equivalent connections need to be made for the Rx signal. The connectors for the optical fiber are SC/APC type. The fiber can be connected directly to the Hub Unit or via a patch panel. There are also connections for communications with other Hub Units and an optional modem access on the rear panel. On the front panel are LEDs to indicate the status of the system as we as a serial connection for access to the FiberDAS optional control software. Remote Unit The Remote Units are distributed throughout the area or building to be covered. They can be mounted on a wall or above a suspended ceiling. Antennas are connected to the Remote Units via flexible RF cable. The front panels of the Remote Units are cast in plastic and can easily be removed and repainted to match the design of the environment. The size of the Remote Unit is 32 x 17 cm and the weight is approximately 2 kg. There are Remote Units for different frequency ranges; 850 MHz, 900 MHz, 1800 MHz, 1900 MHz and UMTS. There are also some dual band options. The output power in the downlink is 14-17 dBm per carrier for 2 carriers depending on frequency band and access type. Gain in the downlink is 14 dB ± 2.5 dB and in the uplink 24 dB ± 2 dB. Noise figure in the uplink is below 9dB. For more specific characteristics please see the data sheet. The Remote Units are powered by 12-24VDC which can be supplied by a Remote Power Supply or a Central Power Supply. Remote Unit Functionality The Remote Units are connected to a Hub Unit via two single mode optical fibers. The optical signal received from the Hub Unit is translated to an RF signal which is amplified, filtered and output to the antenna. The output level can be adjusted in 2 dB steps for optimum coverage. In the uplink the received RF signal is translated to an optical signal and sent back to the Hub Unit via the optical fiber. The system performance is specified for 4 dB optical loss. Remote Unit Input and Output The Remote Units have one RF port for connection to an indoor antenna. Via splitters several antennas can be connected to one Remote Unit. This though reduces the output power per antenna. The connectors for the optical fiber are SC/APC type. Power Supply Remote Power Supply The Remote Power Supply is powered by 110 - 240 VAC and supplies DC power to the Remote Unit. A back-up battery ensures 15-20 minutes of full operation in case of a power failure. One Remote Power Supply is needed for each Remote Unit. The unit is similar in design to the Remote Units. Also on this unit the cover can be removed and painted in a suitable color. The size is 32 x 12 cm and the weight is approximately 2 kg. Central Power Supply The central Power Supply supplies DC power to up to 16 Remote Units. It should be located near the Hub Unit so that the cabling to the Remote Units (optical fiber and power cord) can be coordinated. The Central Power Supply is powered by 90 - 264 VAC. A back-up battery ensures 15-20 minutes of full operation in case of a power failure. Installation FiberDAS is easy to install since any standard telecom grade single mode fiber can be used. The cables can be terminated on site with SC/APC optical connectors. The SC/APC connectors plugs directly into the Remote Units and via a patch panel to the Hub Unit. The Remote Transceiver uses field-installable SC/APC optical connectors eliminating he need for pre-cut cables and fiber. Built-in optical loss compensation automatically equalizes the gain in both the transmit- and receive- paths. In this way the transmit RF power is known for a given input RF power and the receive path sensitivity is optimized. The only adjustment that can be made during installation of the system is a manual setting of the static transmit power to optimize the coverage. This is done via a potentiometer on the Remote Units (the units do not need to be opened). This is to be seen as a one time adjustment performed only in connection to the installation. The Remote Units and the Remote Power Supply units can be mounted on wall mounting brackets which make the final installation very easy. Installation Example This example shows a building with a roof antenna. The signal is tapped down to a repeater and via an entry shelf to the Hub Unit. The entry shelf is designed for each specific case. It ensures that the signal levels are correct and that the FiberDAS system does not influence other systems in negative way. The remote units are placed at suitable locations and antennas are attached. The number of remote units needed depends on a number of parameters, such as room layout, walls, etc. A pair of single mode fibers is installed between each remote unit and the hub. As an alternative the input signal can be tapped directly off a base station via a suitable entry shelf. Specications Uplink RF Parameters Frequency Gain (over full band and 850 MHz 900 MHz 824 - 849 MHz 890 - 915 MHz 24 dB ± 2 dB 24 dB ± 2 dB 24 dB ± 2.5 dB 24 dB ± 2.5 dB 24 dB ± 2.5 dB (Band any 15 MHz) ± 1 dB ± 1 dB ± 1 dB ± 1 dB ± 1 dB Noise Figure (per link) Input/Output VSWR ≤ 9 dB ≤ 9 dB ≤ 9 dB ≤ 9 dB ≤ 9 dB <1.5:1 <1.5:1 <1.5:1 <1.5:1 <1.5:1 850 MHz 900 MHz 1800 MHz 1900 MHz optical loss range) 1800 MHz 1900 MHz 1710 - 1785 MHz 1850 - 1910 MHz UMTS 1920 - 1980 MHz Amplitude Flatness Downlink RF Parameters Frequency Output Power Adjustment Range 824 - 849 MHz 935 - 960 MHz 1805 - 1880 MHz 1930 - 1990 MHz UMTS 2110 - 2170 MHz ≥ 12 dB in 2dB steps; user adjustable Gain (over full band and 14 dB ± 2.5 dB optical loss range) Amplitude Flatness (Band any 15MHz) ± 1 dB ± 1 dB ± 1 dB ± 1 dB ± 1 dB Input/Output VSWR <1.5:1 <1.5:1 <1.5:1 <1.5:1 <1.5:1 850 MHz 900 MHz 1800 MHz 1900 MHz UMTS 2 Carriers 14 14 17 17 14 4 Carriers 11 11 14 14 11 8 Carriers 8 8 11 11 8 16 Carriers 5 5 8 8 5 Output Power/Carrier (dBm) Intermodulation & Spurious Meets GSM 05.05 and 11.26 & 3GPP TS25.106 Output Noise Power <-100 dBm/Hz Optical Parameters Wavelength Optical Loss Range Optical Connector Fiber Operating Temperature 1310 +/- 20 nm 4 dB SC/APC, >50 dB return loss Single mode +5° to +45° C Maximum RF Input Power Uplink Downlink +5 dBm +26 dBm Electrical Hub Shelf 100 - 240 VAC, 47 - 63 Hz,<70W w/8 Plug-Ins Hub Transceiver Unit Remote Transceiver unit 6W Single band: +12 V to +24 V, 12 W AVITEC AB, Address: Box 20116, S-161 02 BROMMA, SWEDEN Phone:+46-8-475 47 00 Fax:+46-8-475 47 99 E-mail: [email protected]