BBU–RRU
EN
Huawei radio category illustration
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Huawei

RRU3908 V2

What it does: RF transmission / reception. TX / RX modes: 2T2R.

1 part number: 02319644; 02318969; 02318970; 02319527; 02318968; 02316743

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Main specifications

Technologies850 DC: GSM/UMTS/GU; 900 DC or AC: GSM, UMTS, LTE FDD, LTE NB-IoT and multimode combinations; LTE on 900 MHz is hardware-only unless cleared by Huawei
TX / RX modes2T2R
RF output powerPower capacity 2 × 60 W; because of the operating-temperature restriction, actual usable power capacity is limited to 2 × 40 W
Interfaces / connectorsDC RRU: two −48 V DC power connections (main and cascaded), 2 × optical/electrical CPRI, EXT_ALM, RX_IN/OUT RF interconnection, RET, and 2 × RF TX/RX (A/B). AC configuration additionally has AC-in and DC-out on the AC conversion module
FamilyHuawei RRU3908 V2 outdoor remote-radio family (SRAN /; eRAN )
Installation environmentOperating temperature: −40…+55 °C without solar radiation; −40…+50 °C with solar radiation. Operating-environment class ETSI EN 300019-1-4 Class 4.1 (non-weatherprotected locations)
IP ratingIP65
Additional technical information
Dimensions
DC: 485 × 380 × 170 mm with housing; AC: 485 × 380 × 250 mm with housing
Weight
DC: 23 kg with housing; AC: 29 kg with housing
Bandwidth
LTE FDD: 1.4/3/5/10/15/20 MHz per carrier; GSM/UMTS/NB-IoT bandwidths are not replaced by this LTE list
Capacity
GSM: 8 TRXs. UMTS: 2 carriers at 850 MHz or 4 carriers at 900 MHz. LTE FDD: 1 MIMO carrier with 1.4/3/5/10/15/20 MHz bandwidth; GU/GL mixed-mode carrier combinations are configuration-dependent
Synchronization
In mode CPRI: clock signal recovery from the incoming line; frame synchronization from REC
Chassis
Outdoor remote radio unit; documented in DC and AC configurations, with a separate AC conversion module for AC input
Modules
RRU module; AC configuration adds an AC conversion module
Architecture
Modular outdoor RRU with external ports on the bottom/cabling-cavity panels; baseband transport uses two optical/electrical CPRI ports and the radio path includes RF/IF conversion plus shared RX/TX antenna-path filtering
Details
Receives downlink baseband from the BBU and returns uplink baseband; down-converts RX RF to IF and performs amplification/A-D conversion; filters, D-A converts and up-converts TX; multiplexes and filters RX/TX on the shared antenna path

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