A、To save antennas
B、To share PCM links
C、To share RBS equipment
D、To simplify the installation
E、To be able to reuse frequencies
更多“Why are base stations sometimes cascade connected? （）”相关的问题
A、Because they are not engaged in the distress traffic B、they will affect the transmission of the distress traffic C、The powers of these stations are very weak D、They are not in charge of search and rescue
A、A.SAR party and the ship in distress B、B.SAR authorities and the ship in distress and survival craft C、C.A ship station and any coast station D、D.Ship stations and shore-based communication network
A、the station bill is posted in each compartment B、temporary personnel and visitors are advised of emergency stations C、names of crew members are listed on the station bill D、no changes are made to the station bill
A、the Muster List ("Station Bill") is posted in each compartment B、temporary personnel and visitors are advised of emergency stations C、names of crew members are listed on the Muster List ("Station Bill") D、no changes are made to the Muster List ("Station Bill")
A、between ship stations and shore-based communication networks B、concern the management and operation of ships C、may have an impact of the safety on ships D、all of A, B, C
A、Up to four sites can share one PCM link. B、Several TRXs can share one antenna system. C、The mobile can listen to two base stations at the same time. D、Only one base station is needed per site. E、Sending and transmitting can be performed from the same antenna.
A、every station in one chain to transmit at the same time B、each station to transmit without reference to another station C、on-line transmission of single-line transmitters at the same time D、each station to only depend on the master for synchronization and signal ratio
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