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Andrew Multimode Power Distribution Unit Installation And Operation User Manual

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Installation and Operation
User Guide

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Summary of Contents for Andrew Multimode Power Distribution Unit

  • Page 1 Installation and Operation User Guide...
  • Page 3 Purpose and Intended User of this Manual ................ 1 Scope ..........................1 Glossary of Abbreviations....................1 Reference Documents ....................... 1 Radio Frequency Radiation Hazard ................... 2 High Current Hazard......................2 Electrostatic Discharge (ESD) ................... 2 Dual Band Systems ......................3 Single Band System ......................
  • Page 4 * + + ! " # " & " ! " # $ ! & ' ' & ) ' ( $ " & $ & ) + ) $ # $ $ - ' ' - ' - # $ $ &...
  • Page 5 This manual provides a complete description of the Multimode Power Distribution Unit (PDU) along with installation and operating instructions for its use in general purpose applications. The intended user of this manual is an engineer or technician with adequate and specific experience in installing base transceiver station (BTS) and antenna line equipment such as base station antennas and tower mounted amplifiers (TMAs).
  • Page 6 All operations relating to the installation of the PDU must be executed in accordance with industry approved safety standards and practices. The installer shall also follow the safety practices recommended by the BTS provider to insure that the BTS operation is not compromised. % &...
  • Page 7 This section provides single sector illustrations of several RF path configuration examples. While frequency bands vary and variations can occur, the examples provide guidance for many common situations. Contact your Andrew Corporation Sales Representative for recommendations on applicable system components. "...
  • Page 8 1 + . / 0 In Figure 2, dual-band, diplexed Andrew OneBase™ TMAs are used with shared feeders and shared antennas. OneBase™ diplexers at the BTS level incorporate DC redundancy circuitry, automatically routing the DC to the feeder and blocking the opposite branch.
  • Page 9 2 + . / 0 Figure 3 shows a TMA system with Andrew OneBase™ TMAs and separate feeders for each band. The OneBase™ dual-band TMAs incorporate DC redundancy circuitry that allows DC supply for both bands to be provided to either BTS/Node-B port.
  • Page 10 To Antenna To Antenna To BTS RX/TX Bias Tee Feeder To BTS RX/TX Tower Base Station Bias Tee Harness Black: 1 Gray or Yellow: 2 White: 3 To Sector 2 Red: 4 Green: 5 To Sector 3 Blue: 6 Alarm Cable Blue: NO White: COM To EAI...
  • Page 11 The PDU provides DC power conversion, regulation, and distribution to power TMAs at a cell site. Each PDU can power up to six TMAs via six Bias Tees. Two different output current ranges are supported for compatibility with a variety of TMA types. A shunting block on the rear panel allows selection of the desired output current range.
  • Page 12 light indicates supply voltage is within specified range. D otherwise. REEN light indicates internal voltage is within specified range. A D LED may indicate PDU REEN malfunction or short circuits present at more than two outputs. " , : ! light indicates voltage and current is within normal range for each output.
  • Page 13 The Power Cable is illustrated in Figure 7. Two color-coded or number-coded 18 – 24 AWG wires in a common jacket are attached to a pluggable terminal block on one end for connection to the PDU. The opposite end is unterminated. Power Cables are available in a selection of lengths and can be trimmed to the desired length on site.
  • Page 14 Figure 9: Standard Bias Tee Harness Figure 10: Sector-split Bias Tee Harness 2 ) 3 A Rack Extender (see Figure 11) is used when installing the PDU in a standard EIA 23” rack. The extender plate is attached to the left or right side of the PDU using the enclosed hardware. Figure 11: Rack Extender November-2007 Bulletin II-102051-EN •...
  • Page 15 Select the installation location. The PDU installs in a standard 19” rack (or 23” rack using a Rack Extender) in a climate controlled environment. It can be mounted in any orientation. Ensure optimum airflow around the instrument for cool operation and maximum life expectancy. Inspect the equipment.
  • Page 16 6 = / 0 , > . + If installing the PDU in a 23” rack, first attach the Rack Extender to either side of the PDU using the included hardware. Tighten the fasteners securely. Mount the PDU in the rack using four suitable rack screws (not included). Tighten securely. 6 8 %, 5 0 The addition of a ground cable is recommended but may not be necessary in some installations.
  • Page 17 ) *, " - " & - " " : 7 ; ! < >$ ?7 ; ! < Use a dedicated circuit for the PDU if the BTS power panel is so equipped. Install a fuse or circuit breaker with a rating in the 1-5 A range. "...
  • Page 18 6 # + Connect the Bias Tee Harness to the DC Output connector and tighten the jackscrews (Figure 16). Figure 16: Bias Tee Harness connection Route the Bias Tee Harness to the Bias Tees, attach the SMA connectors and tighten to 0.8 – 1.1 Nm (7 –...
  • Page 19 For all outputs in use, set the DC Output DIP switches to E (up) and the TMA Alarm DIP NABLE switches to E (down). See Figure 17. For any unused outputs, set the corresponding DC NABLE Output and TMA Alarm DIP switches to D ISABLE Enable Alarm...
  • Page 20 • For all outputs where DC Output DIP switches are E and TMA Alarm DIP switches are NABLED , the TMA Alarm LED is initially G and turns R in 5 s. NABLED REEN • For all outputs where TMA Alarm DIP switches are D , the TMA Alarm LED stays D ISABLED •...
  • Page 21 " Before operating, ensure all parts of the TMA system are installed and all connections completed. Also refer to instructions provided with other equipment. Turn the PDU O . Verify that all front panel LEDs stay G . Only LEDs for outputs with TMA REEN Alarm D shall be D...
  • Page 22 indications will clear once the problem is corrected. " 5 . 5 5 , , Each output is individually monitored. With associated TMA Alarm DIP switch E , current NABLED consumption outside the selected range is considered a fault condition. Once a persistent fault condition has existed on the same output for 5 s, the associated TMA Alarm LED turns R and the Alarm Interface goes into the A...
  • Page 23 Because the PDU supplies and monitors the entire TMA system, all system components should be considered when troubleshooting. The TMA system can include TMA, Bias Tee, surge arrestor, diplexer (crossband coupler), and other devices in addition to RF and DC cables and connectors as well as the PDU itself.
  • Page 24 ISABLE normally and then proceed with steps above. Technical support is available 24 hours a day, five days a week through the Andrew Customer Technical Support center (CTS). Between the hours of 11 pm Friday and 8 am Monday, immediate support is available for any critical issue causing a service outage while other support requests will be scheduled for the next business day.
  • Page 25 A functional block diagram of the PDU is shown in Figure A-1. Input OK DC2 OK TMA Alarm x 6 DC Output Power On/Off Input Current Mon DC/DC Voltage TMA 1 Conv Monitor Protection Current Mon Voltage TMA 2 Protection Alarm Interface Current Mon...
  • Page 26 Andrew TMAs are equipped with internal fault monitoring and will raise or lower their current consumption as a means to signal a fault condition to the PDU. Abnormal current consumption can also result from other problems in the DC path from PDU to TMA.
  • Page 27 + * 2 # % / & & PDU dimensions are shown in Figure A-4. The weight of the PDU without accessories is 1.1 kg. Figure A-4: Mechanical dimensions, in (mm) Bulletin II-102051-EN • Revision B November-2007...
  • Page 28 Week/Year Figure B-1: Part number label The part number and revision code should be verified to ensure the applicable Installation and Operation User Guide is used and should also be referenced when contacting Andrew Customer Technical Support. 8 " The following part numbers are included in the scope of this Installation and Operation User Guide: ! "...
  • Page 29 The model number is found on a label affixed to the packaging of the kit and should be referenced when placing an order with Andrew Customer Care. The table below lists model numbers currently issued and their configurations. Additional model numbers may be issued based on demand and customer requests.
  • Page 30 Beginning with revision 02, the Multimode PDU supports special purpose modes M A and M B in addition to the LO C and HI C modes, which are supported by all revisions. URRENT URRENT A and M B are intended for use in specific site configurations not described herein. The user will need additional information if using M A and M B in these intended configurations.
  • Page 32 ) / 2 % 4 $ ' ( ( , ' ! "# " $$" %&' & $ # +, - ! . "&&'"%/$" $ $ $$ - - " $ "1 2 ) 0 3 4 &5 .%%$' &# &...