发展中国家的1 800兆赫的移动电话的信号助推器的转发

Product:DCS 1800 MHz Mobile Phone Signals Booster Repeater Amplifier 60dB! Description This is for a brand new DCS 1800 MHz Signals Booster Repeater for Mobile Phones The Booster can strengthen the GSM signals at your premises; no more drop calls or experiencing poor mobile phone calls! One Year Extended Replacement Warranty! Half price of Street Price ! Background DCSmobile networks are everywhere around the world but depending on where a mobile phone is located, regrettably the quality of theDCS signals differ significantly from excellent to poor. The item in auction is designed to address the signals strengthissue by boosting the signals in two directions (Full Duplex) : 1. signals transmitted from a mobile phone are received by the signal booster over the air via the booster's indoor antenna and these signals are amplified and retransmittedover the air via the booster's outdoor antenna to a nearby cellular phone base station. 2. signals transmitted from a cellular phone base station are received over the air by the booster via the booster's outdoor antenna and these signals are amplified and retransmittedover the air via the booster's indoor antenna to a mobile phone. TheDCS Booster can be viewed as an intermediate agent to help to set up a reliable wireless link between a mobile phone and theDCS mobile networks infrastructure. The Booster is particularly useful in zones with poorDCS coverage such as basements, car parks and tunnels. It can also be used in offices, homes, supermarkets, cinemas and hotels etc. It is specifically designed for indoor uses. The Booster employed advanced filtering technology to reject the out of bands signals in the amplification stages, this results in crystal clear voice communication for an establishedDCS call as theDCS uplink and downlink signals are effectively isolated . Its AGC (Automatic Gain Control) mechanism ensures an optimum power is provided for the cell phone site as well as the mobile phone; all these are performed without user's intervention.How the Booster benefits youReduce drop calls and improveDCS voice communication quality. Specifications Up-link Frequency: 1710-1785 MHz Down-link Frequency: 1805-1880 MHzUp-link Gain :55 dBDown-link Gain : 60 dB 5,000 sq. ft. indoor coveragePower output: 17 dBmPass band ripple: <5dB Out of band rejection: (BW-60dB)<42MHz, (BW-70dB)<45MHz I/O return loss<-8dB Noise figure<8dB Inter modulation Attenuation (Po=13dBm)<-40dBc Ambient temperature-10 50 degree Power supply: AC110 220V±10% 45 55HzWorking voltage: DC5V Compliance StandardTo the GB6993-86 standard Electromagnetic compatibilityTo the ETS300 694-4 standard Functiona) Power supply LED b) Power Output LED*****Important!!!***** Please note that the Booster works forDCS networks operating at theDCS standard frequencies shown above.PLS MAKE SURE THE ABOVE FREQUENCY CAN WORKWELL ATYOURLOCATION! Package: *DCS Signal Booster Panel ×1* Outdoor Yagi antenna X 1(mounting bracelet included)* Indoor whip antenna X 1* Signal cable X 1 * English user manual ×1 *Power adapter X 1