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RRU3908

The RRU3908 is an outdoor RF remote radio unit designed for modulation, demodulation, and data processing of baseband and RF signals, featuring a modular structure with multiple ports for connectivity. It supports various configurations for GSM and UMTS carriers, with specific output power ratings and receiver sensitivity specifications. The unit is built to withstand harsh environmental conditions, meeting various technical and EMC standards.

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12 views6 pages

RRU3908

The RRU3908 is an outdoor RF remote radio unit designed for modulation, demodulation, and data processing of baseband and RF signals, featuring a modular structure with multiple ports for connectivity. It supports various configurations for GSM and UMTS carriers, with specific output power ratings and receiver sensitivity specifications. The unit is built to withstand harsh environmental conditions, meeting various technical and EMC standards.

Uploaded by

Daniel Zuniga
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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RRU3908 Multi-Mode Base Station

Transceiver Product Description

1.1 RRU3908
The RRU3908 is an outdoor RF remote radio unit, which performs modulation, demodulation,
data processing, and combining and dividing for baseband signals and RF signals.

1.1.1 Appearance of the RRU3908


Figure 1-1 shows the RRU3908.

Figure 1-1 RRU3908

1.1.2 Ports on the RRU3908


The RRU3908, which has a modular structure, has its external ports located at the bottom of
the module and in the cabling cavity.

Table 1-1 Ports on the RRU3908

Port Quantity Description

CPRI_E 1 Eastward optical or electrical port, 1.25Gbit/s


CPRI_W 1 Westward optical or electrical port, 1.25Gbit/s
EXT_ALM 1 Alarm port
ANT_TX/RXA 1 Antenna ports for connecting to the antenna system
ANT_TX/RXB 1
RX_IN/OUT 1 Inter-RRU port
RET 1 Port for the RET antenna communication

Issue 1.1 (2009-08-05) Huawei Proprietary and Confidential Page 1 of 6


Copyright © Huawei Technologies Co., Ltd.
RRU3908 Multi-Mode Base Station
Transceiver Product Description

Table 1-2 Buttons and terminals on the RRU3908

Label Description
RST Reset button
VSWR -
RTN+ Terminals for power cables
NEG-

1.1.3 Typical Configuration of RRU3908


Table 1-3 lists the typical configuration of RRU3908 in compliance with the specifications for
multi-carrier base station (Class2) in 3GPP TS 45.005 V8.2.0.

Table 1-3 Typical configuration of RRU3908


Number of Number of Output Power per Output Power per
GSM Carriers UMTS Carriers GSM Carrier (W) UMTS Carrier (W)

1 0 40 0
2 0 40 0
3 0 20 0
4 0 15 0
5 0 12 0
6 0 10 0
1 1 40 30
1 1 30 40
1 2 30 20
2 1 20 30
2 1 15 40
2 2 15 20
3 1 10 30
3 2 10 10
4 1 7.5 20
4 2 7.5 10
5 1 6 20
0 1 0 40
0 2 0 30

Issue 1.1 (2009-08-05) Huawei Proprietary and Confidential Page 2 of 6


Copyright © Huawei Technologies Co., Ltd.
RRU3908 Multi-Mode Base Station
Transceiver Product Description

0 3 0 20
0 4 0 15

 At the 1800 MHz band, only GSM is supported in terms of software currently; UMTS and LTE are
unsupported in terms of software currently, but they are supported in terms of hardware.
 The output power in 8PSK mode is 1.8 dB less than that in GMSK mode.

Table 1-4 lists the typical configuration of RRU3908 in compliance with ETSI TS 100 910
V8.20.0.

Table 1-4 Typical configuration of RRU3908


Number of Number of Output Power per Output Power per
GSM Carriers UMTS Carriers GSM Carrier (W) UMTS Carrier (W)
1 0 20 0
2 0 20 0
3 0 15 0
4 0 15 0
5 0 10 0
6 0 10 0
1 1 20 40
2 1 15 30
2 2 10 20
3 1 10 30
1 2 20 20
3 2 10 15
0 1 0 40
0 2 0 30
0 3 0 20
0 4 0 15

The output power in 8PSK mode is 1.8 dB less than that in GMSK mode.

Issue 1.1 (2009-08-05) Huawei Proprietary and Confidential Page 3 of 6


Copyright © Huawei Technologies Co., Ltd.
RRU3908 Multi-Mode Base Station
Transceiver Product Description

Technical Specification

1.2 Technical Specifications of the DBS3900


Table 1-5describes the technical specifications of the DBS3900.

Table 1-5 Technical specifications of the DBS3900


Item Specification

Band Frequency RX Band (MHz) TX Band (MHz)


Band
900 MHz 890 to 915 935 to 960
880 to 905 925 to 950
850 MHz 824 to 849 869 to 894
1800 MHz 1,710 to 1,755 1,805 to 1,850
1,740 to 1,785 1,835 to 1,880
1900 MHz 1,850 to 1,890 1,930 to 1,970
1,870 to 1,910 1,950 to 1,990
Capacity BBU3900 S24/24/24
GSM
RRU3908 6TRX per RRU3908
（
GSM Class2 ）
RRU3908 G5U1 or G4U2
（
GSM Class2 ）
+UMTS
RRU3908 4 carriers per RRU3908
UMTS
RRU3908 6TRX per RRU3908
（
GSM ETSI ）
RRU3908 G3U2
（
GSM ETSI ）
+UMTS
Receiver Mode 1-way Receiver 2-way Receiver Description
sensitivity Sensitivity Sensitivity
(dBm) (dBm)

Issue 1.1 (2009-08-05) Huawei Proprietary and Confidential Page 4 of 6


Copyright © Huawei Technologies Co., Ltd.
RRU3908 Multi-Mode Base Station
Transceiver Product Description

Item Specification
UMTS –125.5 –128.3 The receiver sensitivity at the
antenna connector of the Node B
according to 3GPP TS 25.104,
12.2 kbps, BER not exceed 0.001.
–126.2 –129.0 The receiver sensitivity (at the
central frequency point) is
measured at the antenna connector
on condition that the AMR service
at 12.2 kbit/s is used and the BER
is not higher than 0.001.
GSM –113 –116 -
Clock Line clock, GPS clock, BITS clock, clock of the Oven Controlled Crystal Oscillator
synchronization (OCXO) in free-run mode, and IP clock
Dimension (H x RRU3908: 485mm × 380mm × 170mm (with the housing)
W x D) RRU3908: 480mm × 356mm × 140mm (without the housing)
Weight RRU3908: 21 kg (without the housing)
RRU3908: 23 kg (with the housing)
Input power RRU3908: –48 V DC; voltage range: –36 V DC to –57 V DC
Power Mode Configuration Output Power Typical Power Maximum Power
consumption (900MHz) per Carrier Consumption Consumption (W)
(W) (W)
GSM (Class2) 3×2 20 760 910
3×4 20 730 1,070
3×6 12 730 1,070
GSM GSM 3 × 2 + 20/20 870 1,090
(Class2)+UM UMTS 3 × 1
TS
GSM 3 × 4 + 10/20 820 1,050
UMTS 3 × 1
GSM 3 × 4 + 10/10 820 1,050
UMTS 3 × 2
UMTS 3×1 20 490 590
3×2 20 640 790
3×3 20 880 1,100
3×4 15 880 1,110
GSM (ETSI) 3×2 20 650 840
3×4 10 790 980
3×6 10 1,000 1,350

Issue 1.1 (2009-08-05) Huawei Proprietary and Confidential Page 5 of 6


Copyright © Huawei Technologies Co., Ltd.
RRU3908 Multi-Mode Base Station
Transceiver Product Description

Item Specification
GSM(ETSI)+ GSM 3 × 1 + 20/20 770 890
UMTS UMTS 3 × 1
GSM 3 × 2 + 10/20 810 990
UMTS 3 × 1
GSM 3 × 3 + 10/20 890 1,130
UMTS 3 × 1
Operating BBU3900 –20°C to +55°C
temperature
RRU3908 –40°C to +45°C (with solar radiation of 1,120 W/m2)
–40°C to +50°C (without solar radiation)
Relative humidity BBU3900 5% RH to 95% RH
RRU3908 5% RH to 100% RH
Air pressure 70 kPa to 106 kPa
Protection rating BBU3900 IP20
RRU3908 IP65
Max distance 40km ( between BBU and RRU )
Storage ETSI EN300019-1-1 class1.2 "Weather protected, not temperature-controlled storage
locations"

Transportation ETSI EN300019-1-2 class 2.3 "Public transportation"


Anti-seismic IEC 60068-2-57 (1999-11) Environmental testing -Part 2-57: Tests -Test Ff:
performance Vibration-Time-history method
YD5083-99: Interim Provisions for Test of Anti-seismic Performances of
Telecommunications Equipment (telecom industry standard in People's Republic of
China)
EMC The DBS3900 meets the Electro Magnetic Compatibility (EMC) requirements and
complies with the following standards:
R&TTE Directive 1999/5/EC
R&TTE Directive 89/336/EEC
3GPP TS 25.113 V3.2.0 (2000-06)
ETSI EN 301489-1/23
ETSI EN 301908-1 V2.2.1 (2003-10)
ITU-R SM.329-10

Issue 1.1 (2009-08-05) Huawei Proprietary and Confidential Page 6 of 6


Copyright © Huawei Technologies Co., Ltd.

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