Manuale UtenteSommarioIntroduction to Metro Cell14Metro Cell product objectives14Key features14Physical layout of outdoor Metro Cell19Physical layout of Indoor Metro Cell21Digital equipment architecture25Environmental control27Thermal design27Indoor digital rack (DR) of the Metro Cell30Outdoor radio enclosure (RE) physical architecture32Module interrelationships35Subsystem description38Outdoor Metro Cell power systems38DEI physical layout38Backhaul interface39Surge protection39AC power entry and distribution39DC power and distribution40Power, protection and grounding architecture41Backup batteries and sensors41Indoor Metro Cell power systems43AC power Input43DC power input46DC power distribution (FRMs)46Indoor and outdoor Metro Cell distribution module48Battery management52Power distribution53Grounding55Battery backup55CEM principle functions56CEM Interconnect board (IB)60CEM dc voltages60Timing and frequency systems60Global positioning system timing module (GPSTM)60Antennas63Gps antennas63Control Module (CM)63CDMA traffic systems64CORE64Flexible RF modules (FRM)68Transmit / Receive Module (TRM)72Duplexer/LNA Preselector/LNA Module (DPM) - 1900 MHz73Duplexer/LNA module - 800 MHz751900 FRM Triplexer Module (FRMTM)76Electro-optical Module (EOM)77Power amplifier (PAM)78Fan / alarm controller board78Basestation communication network (BCN) distribution80DE / RF module signalling83Signal flow83Forward link baseband signal flow83Field Replaceable Units (FRU)84Outdoor Metro Cell85Software90Specifications92Glossary94Dimensioni: 1,84 MBPagine: 105Language: EnglishApri il manuale