RF Module and RRH main blocks
6 RF Module and RRH main blocks
6.1 RF Module main blocks
24
The RF Module includes the following functional blocks:
RF Baseband (RF BB)
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RF control
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Provides three optical interfaces with the System Module or other RF
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modules (OBSAI RP3_01)
Provides the external alarm interface
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Most of the module internal connections are made through this block
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Processes signals and module control functionalities
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Transmitter
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Direct conversion from TX interface to TX RF
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Digital power control
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TX Double Power and IDD support
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Predistortion transmitter
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Receiver
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Dual down conversion from RX RF to RX baseband signal
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Diversity reception
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Power Amplifier (PA)
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Amplifies signal coming from RF BB TX output and feeds it to TX input of the
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filters
RF Front end
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Includes three duplexers and three diversity RX filters with LNAs and RF test
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loops
Processes air interface RF signals for selected channels
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Provides connection for Flexi Antenna Line to Flexi Multiradio Base Station
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Supports usage of NSN Masthead Amplifier (MHA) units
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Provides the supply voltage for MHA unit via antenna line(s)
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Contains integrated bias-Ts with over-current and undercurrent alarm
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detection/protection
Power supply unit (PSU)
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Contains power input and distribution of internal supply voltages
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Fan assembly
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Consists of three separate fans and a fan plate which mechanically mounts to the
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fan shroud
Flexi Multiradio BTS Radio Module and Remote Radio
DN0951745
Head Description
Issue: 05