RRU5935E Hardware Description Issue 02 Date 2020-05-30 HUAWEI TECHNOLOGIES CO., LTD. Copyright © Huawei Technologies Co., Ltd. 2020. All rights reserved. No part of this document may be reproduced or transmitted in any form or by any means without prior written consent of Huawei Technologies Co., Ltd. Trademarks and Permissions and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd. All other trademarks and trade names mentioned in this document are the property of their respective holders. Notice The purchased products, services and features are stipulated by the contract made between Huawei and the customer. All or part of the products, services and features described in this document may not be within the purchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information, and recommendations in this document are provided "AS IS" without warranties, guarantees or representations of any kind, either express or implied. The information in this document is subject to change without notice. Every effort has been made in the preparation of this document to ensure accuracy of the contents, but all statements, information, and recommendations in this document do not constitute a warranty of any kind, express or implied. Huawei Technologies Co., Ltd. Address: Huawei Industrial Base Bantian, Longgang Shenzhen 518129 People's Republic of China Website: https://www.huawei.com Email: support@huawei.com Issue 02 (2020-05-30) Copyright © Huawei Technologies Co., Ltd. i RRU5935E Hardware Description Contents Contents 1 RRU5935E Hardware Description........................................................................................ 1 1.1 Changes in RRU5935E Hardware Description............................................................................................................... 2 1.2 RRU Introduction..................................................................................................................................................................... 2 1.2.1 RRU Exterior...........................................................................................................................................................................2 1.2.2 RRU Functions....................................................................................................................................................................... 5 1.2.3 RRU Ports................................................................................................................................................................................ 5 1.2.4 RRU Technical Specifications........................................................................................................................................... 8 1.2.5 RRU Indicators...................................................................................................................................................................... 8 1.2.6 Optical Modules................................................................................................................................................................. 10 1.3 RRU Cables.............................................................................................................................................................................. 12 1.3.1 RRU Cable List.................................................................................................................................................................... 12 1.3.2 RRU PGND Cable............................................................................................................................................................... 13 1.3.3 RRU Power Cable............................................................................................................................................................... 14 1.3.4 CPRI Optical Fiber............................................................................................................................................................. 15 1.3.5 RRU RF Jumper................................................................................................................................................................... 21 1.4 RF Cable Connections for RRU5935E with external antennas.............................................................................. 22 Issue 02 (2020-05-30) Copyright © Huawei Technologies Co., Ltd. ii RRU5935E Hardware Description 1 RRU5935E Hardware Description 1 RRU5935E Hardware Description Overview This document provides reference for planning and deploying a BOOK RRU5935E (referred to as RRU in this document) and describes cable connections of the RRU. Product Version The following table lists the product versions related to this document. Product Name Solution Version Product Version RRU5935E SRAN13.1 and later versions V100R013C10 and later versions For details about the software versions of RF modules, see Software and Hardware Compatibility Description. Intended Audience This document is intended for: ● Base station installation personnel ● System engineers ● Site maintenance personnel Organization 1.1 Changes in RRU5935E Hardware Description This chapter describes changes in RRU5935E Hardware Description. 1.2 RRU Introduction This chapter describes the exterior and function of the RRU as well as the ports and indicators on the RRU. 1.3 RRU Cables Issue 02 (2020-05-30) Copyright © Huawei Technologies Co., Ltd. 1 RRU5935E Hardware Description 1 RRU5935E Hardware Description This chapter describes RRU cables. 1.1 Changes in RRU5935E Hardware Description This chapter describes changes in RRU5935E Hardware Description. 02 (2020-05-30) This is the second commercial release. Compared with Issue 01 (2020-02-22), this issue does not include any new information. Compared with Issue 01 (2020-02-22), this issue includes the following changes. Topic Change Description the whole document Added the RRU with an external antenna. Compared with Issue 01 (2020-02-22), no information is deleted from this issue. 01 (2020-02-22) This is the first commercial release. Compared with Draft A (2019-11-30), this issue does not include any new topics or changes, or exclude any topics. Draft A (2019-11-30) This is a draft. 1.2 RRU Introduction This chapter describes the exterior and function of the RRU as well as the ports and indicators on the RRU. 1.2.1 RRU Exterior This section describes the exterior and dimensions of an RRU. RRU5935E RRUs include RRU5935E with external antennas and RRU5935E with internal antennas. The following figure shows an RRU. Issue 02 (2020-05-30) Copyright © Huawei Technologies Co., Ltd. 2 RRU5935E Hardware Description 1 RRU5935E Hardware Description Figure 1-1 RRU exterior (RRU with an internal antenna) Figure 1-2 RRU exterior (RRU with an external antenna) The following figure shows RRU dimensions. Issue 02 (2020-05-30) Copyright © Huawei Technologies Co., Ltd. 3 RRU5935E Hardware Description 1 RRU5935E Hardware Description Figure 1-3 RRU dimensions You can obtain the RRU name, RRU frequency band and power supply information from the nameplate on the cover plate. The following figure shows the positions of the nameplate on the RRU. NOTE The actual nameplate may differ from what is shown in the figure. Figure 1-4 Positions of the nameplate (1) Nameplate (2) Module name (3) Frequency band Issue 02 (2020-05-30) Copyright © Huawei Technologies Co., Ltd. (4) Power supply type 4 RRU5935E Hardware Description 1 RRU5935E Hardware Description 1.2.2 RRU Functions This section describes main functions of an RRU. The Remote Radio Unit (RRU) consists of the high-speed interface unit, signal processing unit, power amplifier, duplexer, extension ports, and power module. The following figure shows the functional structure of the RRU. NOTE ● The following figure shows the functional structure of an RRU with internal antennas. Function units of the RRU with external antennas are the same as those of the RRU with internal antennas except the antenna system. ● For details about the extension ports, see 1.2.3 RRU Ports. Figure 1-5 Functional structure of an RRU The RRU performs the following functions: ● Receives downlink baseband data from the BBU and sends uplink baseband data to the BBU. ● Receives RF signals from the antenna system, down-converts the signals to intermediate frequency (IF) signals, amplifies the IF signals, performs analogto-digital conversion, and up-converts RF signals to the transmit (TX) band. ● Multiplexes receive (RX) and TX signals on the RF channel so that these signals can share the same antenna channel, and filters the RX and TX signals. 1.2.3 RRU Ports This section describes ports on the RRU panels. An RRU has a bottom panel, cabling cavity panel, and indicator panel. Issue 02 (2020-05-30) Copyright © Huawei Technologies Co., Ltd. 5 RRU5935E Hardware Description 1 RRU5935E Hardware Description RRU with an internal antenna The following figure shows the ports on the RRU panels. Figure 1-6 Ports on the RRU panels The following table describes ports and indicators on the RRU panels. Table 1-1 Ports and indicators on the RRU panels Item Silkscreen Description 1. Ports in the cabling cavity CPRI0 Optical port 0, connected to the BBU or an upper-level RRU CPRI1 Optical port 1, connected to a lower-level RRU or the BBU L Power supply socket, For details about RRU power cable appearance and specifications, see 1.3.3 RRU Power Cable. N PE 2. Indicators RUN For details, see 1.2.5 RRU Indicators. ALM ACT VSWR Issue 02 (2020-05-30) Copyright © Huawei Technologies Co., Ltd. 6 RRU5935E Hardware Description 1 RRU5935E Hardware Description Item Silkscreen Description CPRI0 CPRI1 RRU with an external antenna The following figure shows the ports on the RRU panels. Figure 1-7 Ports on the RRU panels The following table describes ports and indicators on the RRU panels. Issue 02 (2020-05-30) Copyright © Huawei Technologies Co., Ltd. 7 RRU5935E Hardware Description 1 RRU5935E Hardware Description Table 1-2 Ports and indicators on the RRU panels (RRU with an external antenna) Item Silkscreen Description 1. Ports at the bottom A TX/RX port A (4.3-10 female connector) B TX/RX port B (4.3-10 female connector) C TX/RX port C (4.3-10 female connector) D TX/RX port D (4.3-10 female connector) CPRI0 Optical port 0, connected to the BBU or an upper-level RRU CPRI1 Optical port 1, connected to a lower-level RRU or the BBU L Power supply socket, For details about RRU power cable appearance and specifications, see 1.3.3 RRU Power Cable. 2. Ports in the cabling cavity N PE 3. Indicators RUN For details, see 1.2.5 RRU Indicators. ALM ACT VSWR CPRI0 CPRI1 1.2.4 RRU Technical Specifications This section describes technical specifications of an RRU, including supported modes, frequency bands, RF specifications, engineering specifications, and antenna capabilities. For details about technical specifications of an RRU5935E, see RRU5935E Technical Specifications. 1.2.5 RRU Indicators There are six indicators on an RRU. They indicate the running status. For detailed positions of RRU indicators, see 1.2.3 RRU Ports. The following table describes RRU indicators. Issue 02 (2020-05-30) Copyright © Huawei Technologies Co., Ltd. 8 RRU5935E Hardware Description 1 RRU5935E Hardware Description Table 1-3 RRU indicators Silkscre en Color Status Description RUN Green Steady on There is power supply, but the board is faulty. Steady off There is no power supply, or the board is faulty. Blinking (on for 1s and off for 1s) The board is running properly. Blinking (on for 0.125s and off for 0.125s) Software is being loaded to the board, or the board is not started. Steady on Alarms are generated, and the module must be replaced. Steady off No alarm is generated. Blinking (on for 1s and off for 1s) Alarms are generated. The alarms may be caused by the faults on the related boards or ports. Therefore, you need to locate the fault before deciding whether to replace the module. Steady on The module is running properly with TX channels enabled or the software is being loaded without RRU running. Blinking (on for 1s and off for 1s) The board is running properly with TX channels disabled. Steady off No VSWR alarm is generated. Steady on VSWR alarms are generated. Steady green The CPRI link is functioning properly. Steady red An optical module fails to receive signals because the optical module is faulty or the optical fiber is broken. Blinking red (on for 1s and off for 1s) The CPRI link is out of lock because of mutual lock of dualmode clock sources or mismatched data rates over CPRI ports (you are advised to check the system configuration to identify the fault). ALM ACT VSWR CPRI0 Issue 02 (2020-05-30) Red Green Red Red or green Copyright © Huawei Technologies Co., Ltd. 9 RRU5935E Hardware Description 1 RRU5935E Hardware Description Silkscre en CPRI1 Color Red or green Status Description Steady off The SFP module is not properly installed, or the optical module is powered off. Steady green The CPRI link is functioning properly. Steady red An optical module fails to receive signals because the optical module is faulty or the optical fiber is broken. Blinking red (on for 1s and off for 1s) The CPRI link is out of lock because of mutual lock of dualmode clock sources or mismatched data rates over CPRI ports (you are advised to check the system configuration to identify the fault). Steady off The SFP module is not properly installed, or the optical module is powered off. NOTE ● To query the indicator status, run the LST RRU command. For example: LST RRU: CN=0, SRN=60, SN=0; ● To turn off an indicator, run the MOD RRU command. For example: MOD RRU: CN=0, SRN=60, SN=0, LEDSW=OFF; ● To turn on an indicator, run the MOD RRU command. For example: MOD RRU: CN=0, SRN=60, SN=0, LEDSW=ON; 1.2.6 Optical Modules An optical module transmits optical signals between an optical port and an optical fiber. Optical modules can be classified as single-mode and multimode optical modules, which can be distinguished as follows: ● The puller of a single-mode optical module is blue and the puller of a multimode optical module is black or gray. ● The transmission mode is displayed as "SM" on the label of a single-mode optical module and "MM" on the label of a multimode optical module. Optical modules must be used in pairs on both ends of an optical fiber. The following table describes the mapping. Issue 02 (2020-05-30) Copyright © Huawei Technologies Co., Ltd. 10 RRU5935E Hardware Description 1 RRU5935E Hardware Description NOTICE Each type of optical module has its own mapping. If different types of optical modules are used, performance risks may arise, for example, alarms, bit errors, and interrupted links. Table 1-4 Optical module mapping Optical Module Type Mapping Between the BBU and RRU SFP duplex (two-fiber bidirectional, duplex for short) optical module SFP duplex optical modules with the same specifications are used on both sides. SFP BIDI (single-fiber bidirectional, BIDI for short) optical module SFP BIDI optical modules are used on both sides, or the DSFP optical module is used on the BBU side and the SFP BIDI optical module is used on the RRU side. ● The receive and transmit wavelengths of an optical module on both sides have the mapping relationship. For example, if the receive and transmit wavelengths of the optical module on the BBU side are 1270TX/1330RX, those on the RRU side are 1330TX/1270RX. ● Except for wavelengths, the specifications of optical modules are the same. For details about the DSFP optical module, see the hardware description of the corresponding BBU. NOTE ● The exterior and label on an optical module in this section are for reference only. ● The rate of the optical module to be installed must be the same as the rate of the CPRI port. ● Only Huawei-certified optical modules meeting the following requirements can be used for Huawei wireless devices: ● Requirements of devices on which optical modules are to be installed ● Laser safety requirements in the IEC 60825-1 standard ● General safety requirements in the IEC 60950-1 standard ● For part numbers for Huawei Wireless certificated and provided SFP and QSFP optical modules, see Spare Parts Catalog. ● The supported maximum remote distance varies depending on the optical module. For details, see section "CPRI Optical Fiber" in "Base Station Cables". CPRI optical fibers are configured based on application scenarios. SFP Optical Module The following figure shows the exteriors of SFP optical modules. Issue 02 (2020-05-30) Copyright © Huawei Technologies Co., Ltd. 11 RRU5935E Hardware Description 1 RRU5935E Hardware Description Figure 1-8 SFP optical modules a: duplex optical module b: BIDI optical module There is a label on each optical module, which provides information such as the rate, wavelength, and transmission mode, as shown in the following figure. Figure 1-9 Label structure (1) Rate (2) Wavelength (3) Transmission distance (4) Transmission mode 1.3 RRU Cables This chapter describes RRU cables. 1.3.1 RRU Cable List This section describes the cables for the RRU. It also describes the connectors at the two ends of the cables and the cable connections of the RRU. Table 1-5 lists RRU cables. Issue 02 (2020-05-30) Copyright © Huawei Technologies Co., Ltd. 12 RRU5935E Hardware Description 1 RRU5935E Hardware Description Table 1-5 RRU cables Cable One End The Other End Connector Connected to... Connector Connected to... RRU PGND Cable OT terminal (M6, 6 mm2 or 0.009 in.2) Ground terminal on the RRU OT terminal (M8, 6 mm2 or 0.009 in. 2) Ground terminal on the ground bar RRU Power Cable (with an ODM) Female fast AC-EPC1 connector (pressfit type) PWR port on the RRU Cord end terminal OUTPUT port on the ODM RRU Power Cable (without an ODM) Female fast AC-EPC1 connector (pressfit type) PWR port on the RRU Depending on the power supply equipment External power supply equipment CPRI Optical Fiber (with an ODM) DLC connector CPRI port on the RRU FC connector, SC connector, or DLC connector CPRI input port on the ODM CPRI Optical Fiber (without an ODM) DLC connector CPRI port on the RRU DLC connector CPRI port on a board in the BBU RRU RF Jumper 4.3-10 male connector RF ports on the RRU 4.3-10 male connector or N male connector Antenna system NOTICE Select cables based on the type of the connector at the other end of the cable on live networks. NOTE RRU RF jumpers are not delivered for RRUs with internal antennas. 1.3.2 RRU PGND Cable An RRU PGND cable connects an RRU and a ground bar, ensuring the proper grounding of the RRU. The maximum length of an RRU PGND cable is 30 m (98.42 ft). Issue 02 (2020-05-30) Copyright © Huawei Technologies Co., Ltd. 13 RRU5935E Hardware Description 1 RRU5935E Hardware Description Exterior An RRU PGND cable is green or green and yellow. Both ends of the PGND cable are OT terminals. If the customer prepares the PGND cable, a copper-core cable with a cross-sectional area of 6 mm2 (0.009 in.2) or larger is recommended. Figure 1-10 shows the exterior of a PGND cable. Figure 1-10 Exterior of a PGND cable 1. OT terminal (M6) 2. OT terminal (M8) One OT terminal must be added to each end of the PGND cable onsite. 1.3.3 RRU Power Cable RRU power cables feed AC power into RRUs from the power equipment. If a power device provided by the customer is used, the recommended specification of the circuit breaker on this power device is 16 A. Appearance The cross sectional area of the RRU AC power cables ranges from 1.5 mm2 to 2.5 mm2 (0.0023 in.2 to 0.0039 in.2). The outer diameter of the power cables ranges from 8.6 mm to 12.5 mm (0.34 in. to 0.49 in.). Figure 1-11 shows the exterior of the cable. Figure 1-11 RRU power cable (1) Female fast AC-EPC1 connector (pressfit type) Installation Position Table 1-6 describes the installation position of an RRU AC power cable. Issue 02 (2020-05-30) Copyright © Huawei Technologies Co., Ltd. 14 RRU5935E Hardware Description 1 RRU5935E Hardware Description Table 1-6 Installation position of an RRU AC power cable One End Connecting to... The Other End Connecting to... Female fast AC-EPC1 connector (pressfit type) of the AC power cable connecting the AC power port in the RRU cabling cavity Onsite power device Cable Description Table 1-7 describes the RRU power cable. Table 1-7 Pin assignment for the wires of the RRU AC power cable on the RRU side Pin Assignment Wire Color L Brown N Blue PE Green and yellow NOTE The cable colors and structures differ in different countries and regions. 1.3.4 CPRI Optical Fiber CPRI optical fibers are classified into multimode optical fibers and single-mode optical fibers. They transmit CPRI signals. A multimode optical fiber connects a BBU to an RRU or connects two RRUs. The maximum length of a multimode optical fiber connecting a BBU and an RRU is 150 m (492.12 ft). The default length of a multimode optical fiber connecting two RRUs is 10 m (32.81 ft). If the distance between two RRUs exceeds 10 m (32.81 ft), contact Huawei engineers. The single-mode optical fiber can be divided into two types: single-mode optical fiber directly connecting a BBU to an RRU or connecting two RRUs (shortened to directly connected single-mode optical fiber) and single-mode optical fiber connecting an ODF to a BBU or RRU (shortened to single-mode pigtail). The length of the directly connected single-mode optical fiber cannot exceed the maximum allowed remote distance between the BBU and RRU. The maximum length of the single-mode pigtail between an ODF and a BBU is 20 m (65.62 ft). The maximum length of the single-mode pigtail between an ODF and an RRU is 70 m (229.66 ft). Issue 02 (2020-05-30) Copyright © Huawei Technologies Co., Ltd. 15 RRU5935E Hardware Description 1 RRU5935E Hardware Description NOTE ● The ODF is an outdoor transfer box for optical fibers, which interconnects the singlemode pigtail and trunk single-mode optical fiber. ● The ODF and trunk single-mode optical fiber are provided by the customer and must comply with the ITU-T G.652 standard. ● A multimode optical fiber is used together with a multimode optical module, and a single-mode pigtail is used together with a single-mode optical module. Selection Principle The following table lists the principles for selecting CPRI optical fibers. Table 1-8 Principles for selecting CPRI optical fibers Remote Distanc e of Optical Fibersa CPRI Data Rate (Gbit/s) of the Optical Module Selection Principle Connects...to... Description ≤ 150 m (492.12 ft) 2.5 to 6.144 Multimode optical fiber/Directly connected singlemode optical fiber 9.8 to 25 Directly connected single-mode optical fiber Connects a BBU to an RRU or AAU, or connects two RRUs or AAUs When multiple RRUs or AAUs are cascaded, multimode optical fibers and single-mode optical fibers can be used together. ≤ 20 km (12.43 mi.) ≤ 25 Single-mode optical fiber (single-mode pigtail and trunk single-mode optical fiber) Connects a BBU to an RRU or AAU, or connects two RRUs or AAUs The single-mode pigtail at the RRU/AAU or BBU side is connected to the trunk singlemode optical fiber by using an ODF. ≤ 70 m (229.66 ft) 40/100 OM3 multimode optical fiber Connects a BBU to an AAU 70 m to 100 m (229.66 ft to 328.08 ft) 40/100 OM4 multimode optical fiber Short-distance connection between the BBU and AAU Issue 02 (2020-05-30) Copyright © Huawei Technologies Co., Ltd. 16 RRU5935E Hardware Description 1 RRU5935E Hardware Description Remote Distanc e of Optical Fibersa CPRI Data Rate (Gbit/s) of the Optical Module Selection Principle Connects...to... Description 100 m to 10 km (328.08 ft to 32808.4 0 ft) 40/100 Single-mode optical fiber (single-mode pigtail and trunk single-mode optical fiber) Connects a BBU to an RRU or AAU, or connects two RRUs or AAUs The single-mode pigtail at the RRU/AAU or BBU side is connected to the trunk singlemode optical fiber by using an ODF. a: The remote distance of optical fibers is the distance between the BBU and the first RRU or AAU or the distance between two RRUs or AAUs. Exterior Multimode optical fiber or directly connected single-mode optical fiber: It can be a dual-core optical fiber with DLC connectors as shown in Figure 1-12 or a single-core optical fiber with LC connectors as shown in Figure 1-13. Figure 1-12 Dual-core optical fiber with DLC connectors (1) DLC connector (2) Breakout cable (3) Label on the breakout cable Figure 1-13 Single-core optical fiber with LC connectors (1) LC connector Issue 02 (2020-05-30) Copyright © Huawei Technologies Co., Ltd. 17 RRU5935E Hardware Description 1 RRU5935E Hardware Description NOTE ● When an optical fiber connects a BBU3900/BBU3910/BBU5900 to an RRU, the breakout cables on the BBU side and on the RRU side are 0.34 m (1.12 ft) and 0.03 m (0.098 ft), respectively. ● When an optical fiber connects a BBU3910A/BBU3910C to an RRU, the breakout cables on the BBU side and on the RRU side are both 0.03 m (0.098 ft). ● When an optical fiber connects two RRUs, the breakout cables on both sides are 0.03 m (0.098 ft). The following figure shows the connection of the multimode optical fiber or directly connected single-mode optical fiber between a BBU and an RRU as an example. Figure 1-14 Connection of the multimode optical fiber or directly connected single-mode optical fiber between a BBU and an RRU (1) Multimode optical fiber or directly connected single-mode optical fiber between a BBU and an RRU OFD06 trunk optical fiber: It connects a BBU to an OFD06 and has 12 LC connectors at each end, as shown in the following figure. Issue 02 (2020-05-30) Copyright © Huawei Technologies Co., Ltd. 18 RRU5935E Hardware Description 1 RRU5935E Hardware Description Figure 1-15 OFD06 trunk optical fiber (1) LC connector (2) Breakout cable (3) Label on the breakout cable Single-mode pigtail: It has a DLC connector at one end and an FC, LC, or SC connector at the other end, as shown in the following figure. Figure 1-16 Single-mode pigtail (1) DLC connector Issue 02 (2020-05-30) (2) Breakout (3) Label on the cable breakout cable (4) FC connector Copyright © Huawei Technologies Co., Ltd. (5) LC connector (6) SC connector 19 RRU5935E Hardware Description 1 RRU5935E Hardware Description NOTE ● When a single-mode pigtail connects a BBU to an ODF, the breakout cables on the BBU side and ODF side are 0.34 m (1.12 ft) and 0.8 m (2.62 ft), respectively. ● When a single-mode pigtail connects an RRU to an ODF, the breakout cables on the RRU side and ODF side are 0.03 m (0.098 ft) and 0.8 m (2.62 ft), respectively. The following figure shows the connection of a single-mode pigtail. Figure 1-17 Connection of the single-mode pigtail (1) Single-mode pigtail between a BBU and an (2) Single-mode pigtail between an RRU and ODF an ODF The OM3 and OM4 multimode optical fibers have the same exterior. Each end of such a cable has an MPO connector. The MPO connector with a strap connects to the BBU and the MPO connector without a strap connects to the AAU, as shown in the following figure. Figure 1-18 OM3/OM4 multimode optical fiber (1) MPO connector (2) Strap (3) MPO connector When baseband interconnection is used between indoor and outdoor BBUs or between cabinets, both ends of the multimode optical fiber are MPO connectors, as shown in the following figure. Issue 02 (2020-05-30) Copyright © Huawei Technologies Co., Ltd. 20 RRU5935E Hardware Description 1 RRU5935E Hardware Description Figure 1-19 Optical fiber for MPO-based interconnection (UBBP-UBBP) (1) MPO connector Label Description The following table describes the labels on the breakout cables of a CPRI optical fiber and recommended cable connections. Table 1-9 Labels on the breakout cables of a CPRI optical fiber Label on the Breakout Cable Installation Position Connection Between a BBU and an RRU or Between an OFD06 and an RRU Connection Between RRUs Connection Between a BBU or RRU and an ODF 1A CPRI RX port on the RRU CPRI RX port on RRU 1 RX port on the BBU or CPRI RX port on the RRU 1B CPRI TX port on the RRU CPRI TX port on RRU 1 TX port on the BBU or CPRI TX port on the RRU 2A OFD06 or TX port on the BBU CPRI TX port on RRU 0 ODF 2B OFD06 or RX port on the BBU CPRI RX port on RRU 0 ODF 1.3.5 RRU RF Jumper The 1/2" RRU RF jumper transmits and receives RF signals between an RRU and an antenna. A fixed-length RF jumper used by an RRU is 2 m (6.56 ft), 3 m (9.84 ft), 4 m (13.12 ft), 6 m (19.68 ft), or 10 m (32.81 ft). A variable-length RF jumper used by an RRU has a maximum length of 10 m (32.81 ft). Issue 02 (2020-05-30) Copyright © Huawei Technologies Co., Ltd. 21 RRU5935E Hardware Description 1 RRU5935E Hardware Description NOTE ● When the distance between an RRU and an antenna is less than 10 m (32.81 ft), one end of the RF jumper is connected to an RF port at the bottom of the RRU, and the other end is connected to the antenna. ● When the distance between an RRU and an antenna is greater than 10 m (32.81 ft), it is recommended that one end of the RF jumper be connected to an RF port at the bottom of the RRU, the other end be connected to one end of the feeder, and the other end of the feeder be connected to the antenna. ● If the customer prepares the RF jumper, the length of the RF jumper should be as short as possible and not exceed 2 m (6.56 ft.). Exterior For an RF jumper, one end is connected to a 4.3-10 male connector, and the other end is connected to a connector based on onsite requirements, which is a 4.3-10 male connector or N male connector. Figure 1-20 shows an RF jumper with two ends connected to 4.3-10 male connectors. Figure 1-20 (1) 4.3-10 male connector 1.4 RF Cable Connections for RRU5935E with external antennas RF cable connections for the RRU vary depending on the configurations of the RRU and antenna. Description of RF Cable Connections This section describes the RF cable connections for the RRU serving a single sector. The following table lists the RF cable connections for the RRU. Issue 02 (2020-05-30) Copyright © Huawei Technologies Co., Ltd. 22 RRU5935E Hardware Description 1 RRU5935E Hardware Description Table 1-10 RF cable connections for the RRU RRU Model Specifications of a Single RRU Scenari o Illustration of Cable Connections RRU5935E For details, see the Typical Power Configuration Reference for RRU in corresponding RRU 4T4R See Figure 1-21. Technical Specifications. Illustration of Cable Connections Figure 1-21 RF cable connections for the RRU Issue 02 (2020-05-30) Copyright © Huawei Technologies Co., Ltd. 23