Ovrrbu-bts. Pdf
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- Điều hướng trang này:
- Environment Requirement
- AirLink 8000 1/30/00 BASE TRANSCEIVER STATION Release 1.00 2 - 34 1.17.3 System Level Parameters
| AirLink 8000
1/30/00 BASE TRANSCEIVER STATION Release 1.00 2 - 33 1.17.2 ENVIRONMENTALS 1.17.2.1 RBU and UPS (Indoor equipment) 1.17.2.2 SU and NTU (Outdoor equipment) Environment Requirement Temperature -10º C to +55º C ambient air Humidity 95% Relative humidity at 30º C, non-condensing Air Pressure 70 to 106 Kpa Shock Basic shipping and handling shock Cooling provisions Forced air convection cooling, Fans & Filter (BTS) Desiccants None Exposure Must withstand UV radiation, water, dust, dirt, sand, etc. EMC/EMI per ETSI 300/339 Safety UL and CE Mark Coatings Protection from humidity and corrosion Environment Requirement Temperature -30º C to +55º C ambient temperature, derated for Altitude. Weight SU: 3.4kg max.; NTU: 340 gm; UPS: 6.8 kg Humidity 100% RH, Condensing Rain 150mm per hour Ice Accumulation 10 mm on exposed surfaces Air Pressure 70 to 106 Kpa Wind Gusts 240 km/hr Shock Basic shipping and handling shock Cooling provisions Natural Convection Only, No Forced Air Cooling Desiccants No desiccants Exposure Must withstand UV radiation, water, dust, dirt, sand, etc. EMC/EMI Per ETS 300 339 as a guide Safety Designed to meet IEC En 60950 Coatings: Protective coatings against humidity and corrosion AirLink 8000 1/30/00 BASE TRANSCEIVER STATION Release 1.00 2 - 34 1.17.3 System Level Parameters Method of Operation Full duplex. Frequency pairs are used, one for the forward channel and the other for the reverse channel. CDMA Method Direct sequence spread spectrum (DSSS), forward and reverse channels Spreading Rate 2.7 Mcps. Forward Error Correction Trellis coding and Viterbi decoding in both forward and reverse channels. Frequency Plan Four bands currently supported: 2.0 to 2.3 GHz as defined by ETSI DE/TM 04031 2.1 to 2.3 GHz as defined by ITU-R F.283-5 2.5 to 2.7 GHz as defined by ITU-R F.283-5 3.4 to 3.6 GHz as defined by CEPT Rec.1403-E Frequency channels In the currently supported plans, each band is divided into 14 MHz channel pairs. Each channel is divided into 4, 3.5 MHz sub-channels Encryption Forward and reverse channels. Voice and data signals: PN scrambling. Control signals: authentication encrypted. Voice Compression Voice mode only: A-law companding with ADPCM. A-law only for fax and modem (ADPCM bypassed). For less band- width efficient cases, voice mode can be used with A-law only, and no ADPCM compression. tải về 0.71 Mb. Chia sẻ với bạn bè của bạn:
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