OverviewAs shown in Figure 2-1, the BTS3902E is an integrated base station with the following main units: transmission interface unit, main processing unit, baseband processing unit, and RF unit. Figure 2-1 BTS3902E Structure The function of each unit is as follows: l Transmission interface unit Provide ports for communication with the RNC and the operation and maintenance (O&M) channels to LMT or M2000. l Main processing unit Manages the entire BTS3902E in a centralized manner in terms of O&M and signaling processing. Also, provides the system clock. l Baseband processing unit Schedules and processes the uplink and downlink user-plane data on the Iub interface. l RF unit Modulates, demodulates, processes, and combines and divides baseband signals and RF signals. l Power Amplifier (PA) Amplifies low-power RF signals. l Duplexer Allows a common antenna to receive and transmit signals. It also filters receive and transmit signals. Ports The BTS3902E has a modular structure with ports on the bottom panel, cabling cavity panel, and LED area. Table 2-1 shows ports on the BTS3902E. Table 2-1 Ports on the BTS3902E
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