RRU3959/BBM/BYE/BPD An Outdoor Remote Radio Unit Which Is Powered By A Power cabinet

Overview

Overview & Function

• The RRU3959 (and RRU3959w) is an outdoor remote radio unit (RRU) used in distributed base station architectures.

• It handles RF functions: modulation, demodulation, combining/dividing baseband and RF signals. 

• It uses software-defined radio (SDR) techniques, allowing mode configurations (multi-mode, multi-band) via software. 

• It has dual transmitter / dual receiver design to boost output power / capacity.

• 

  Physical & Interface Ports
  From Table 1-1: 

  • RF ports: 2 × DIN connectors (to antenna system)

  • CPRI ports: 2 × DLC connectors (connect to BBU) 

  • Power supply port: 1 female connector (tool-less pressfit type) supplying –48 V DC (voltage range –36 V to –57 V) 

  • RET port: 1 × DB9 (for Remote Control Unit, RCU) 

  • Alarm port: 1 × DB15 (for external alarms) 

  Frequency Bands / IBW
  From the frequency spec tables: 

  Variant / Type	RX (MHz)	TX (MHz)	IBW (MHz)
  RRU3959 P900	890 – 915	935 – 960	25
  RRU3959 E900	880 – 915	925 – 960	35
  RRU3959 1800	1710 – 1785	1805 – 1880	45
  RRU3959 2100	1920 – 1980	2110 – 2170	60
  RRU3959w 1800	1710 – 1785	1805 – 1880	75

  Capacity (Single-mode / Multi-mode)

  • In GSM mode (900 / 1800), RRU3959 / 3959w supports up to 8 TRXs. 

  • In UMTS (on 900 / 2100) mode:
     • Without MIMO: up to 6 carriers
     • With MIMO: up to 4 carriers 

  • In LTE (FDD) mode:
     • RRU3959 (1800 MHz) supports 2 carriers (bandwidth 1.4, 3, 5, 10, 15, 20 MHz)
     • RRU3959 (2100 MHz) supports 4 carriers (bandwidth 5, 10, 15, 20 MHz) 
     • RRU3959w supports 2 LTE carriers (5, 10, 15, 20 MHz) 

  • Multi-mode combinations (GSM + UMTS, GSM + LTE, UMTS + LTE, etc.) are supported (within band constraints) 

  Receiver Sensitivity
  From the sensitivity table (Table 2-4)

  • GSM 900: –113.7 dBm (1-way), –116.5 dBm (2-way), –119.2 dBm (theoretical) 

  • GSM 1800: –114.0 dBm (1-way), –116.8 dBm (2-way), –119.5 dBm (theoretical)

  • UMTS 900: –125.8 / –128.6 / –131.3 dBm 

  • UMTS 2100: –126.1 / –128.9 / –131.6 dBm 

  • LTE (FDD):
     • 900: –106.3 / –109.1 / –111.8 dBm 
     • 1800: –106.6 / –109.4 / –112.1 dBm 
     • 2100: –106.9 / –109.7 / –112.4 dBm 

  Output Power
  From various “typical output power” tables, and notes:

  • In GSM mode (900 / 1800), the max per carrier is 60 W (subject to licensing). 

  • Under altitude conditions, output is de-rated: at 3,500–4,500 m → –1 dB; at 4,500–6,000 m → –2 dB. 

  • For dual LTE carriers, power spectral density (PSD) matching is recommended (i.e. equal power per bandwidth). 

  • The “typical” output per carrier depends on mode (GSM, UMTS, LTE) and number of carriers (see tables in the document) 

  Power Consumption & Input

  • Input: –48 V DC (–36 V to –57 V)

  • The RRU3959 / RRU3959w supports AC supply via external AC/DC module or OPM15M module. 

  • Power consumption typical and maximum values are measured at 25 °C; load variation influences consumption. 

  Environmental & Other Specs

  • It is designed for outdoor installation, close to the antennas. 

  • Operating temperature, protection, mechanical dimensions, etc. are part of the full spec, but I did not extract all from the sources I reviewed.

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