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ADC ClearGain User Manual

Tower mounted amplifier system 900/1800 mhz
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ADCP-75-154
Issue 3
August 2006
®
ClearGain
Tower Mounted
Amplifier System 900/1800 MHz

User Manual

1379659 Rev A

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Summary of Contents for ADC ClearGain

  • Page 1: User Manual

    ADCP-75-154 Issue 3 August 2006 ® ClearGain Tower Mounted Amplifier System 900/1800 MHz User Manual 1379659 Rev A...

  • Page 2: Adcp

    DISCLAIMER OF LIABILITY Contents herein are current as of the date of publication. ADC reserves the right to change the contents without prior notice. In no event shall ADC be liable for any damages resulting from loss of data, loss of use, or loss of profits and ADC further disclaims any and all liability for indirect, incidental, special, consequential or other similar damages.

  • Page 3: Table Of Contents

    TROUBLESHOOTING ..............11 TROUBLESHOOTING 2-PORT CLEARGAIN DUAL DUPLEX TOWER MOUNTED AMPLIFIERS ..... 12 Troubleshooting .
  • Page 4 ADCP-75-154 • Issue 3 • August 2006 • Preface Blank Page iv © 2006, ADC Telecommunications, Inc.

  • Page 5: About This Manual

    ADCP-75-154 • Issue 3 • August 2006 • Preface ABOUT THIS MANUAL This document describes the ADC ClearGain 900/1800 MHz tower mounted amplifier system and provides complete instructions for installing this product on a communications tower. ADMONISHMENTS Important safety admonishments are used throughout this manual to warn of possible hazards to persons or equipment.
  • Page 6 ADCP-75-154 • Issue 3 • August 2006 • Preface Blank Page vi © 2006, ADC Telecommunications, Inc.

  • Page 7: Product Overview

    ADCP-75-154 • Issue 3 • August 2006 1 PRODUCT OVERVIEW General Description The ClearGain tower mounted amplifier system is composed of some combination of three functional components: the ClearGain Power Distribution Unit (PDU), the Masthead Unit (MHU), and the Bias-T.

  • Page 8: Functional Description

    Functional Description The basic purpose of a ClearGain tower mounted amplifier system is to amplify the uplink signal just after the antenna. This is done to compensate for the loss in signal strength that occurs in passage of the signal through the coaxial cable to the Base Transceiver Station (BTS) at the base of the tower.

  • Page 9: Mhu Dimensions

    9 0 0 D u a l D u p le x 2 - P o r t T B T S A N T 63 MILLIMETERS 18790-A Figure 3. 900 Narrow Band MHU Dimensions Page 3 © 2006, ADC Telecommunications, Inc.
  • Page 10 1 8 0 0 D u a l D u p le x 2 - P o r t T B T S A N T 63 MILLIMETERS 18791-A Figure 5. 1800 Narrow Band MHU Dimensions Page 4 © 2006, ADC Telecommunications, Inc.

  • Page 11: System Installation

    The kit may be used for tube diameter 30-140 mm. C l e a r G a i 16775-C ANY ClearGain MHU (DETAILS MAY VARY) Figure 6. MHU Long Bolt Mounting Bracket Kit Components Page 5 © 2006, ADC Telecommunications, Inc.
  • Page 12 5. Place the ClearGain MHU as close to antenna as possible. Attach the rest of the fasteners to the bracket system. Fasten the remaining washers and nuts. Verify that the MHU is tightly in place.

  • Page 13: Pdu Installation

    When mounting the PDU on a masonry surface, it is important that the bolts (especially the upper bolts) be located as close as possible to the center of bricks or blocks. Masonry mounting screws are not provided. Page 7 © 2006, ADC Telecommunications, Inc.
  • Page 14 8, is available that will allow the PDU to be mounted on a19-inch rack. If mounting the PDU on a rack, refer to the installation drawing provided with the mounting bracket. MOUNTING BRACKET 18223-A Figure 8. PDU Rack Mount Bracket Page 8 © 2006, ADC Telecommunications, Inc.
  • Page 15 4. Connect the power cable to the site DC power connector. (The power cable has three leads. Red is positive, Black is negative, and Yellow/Green is for ground.) 5. Connect the power cable to the “INPUT” connector on the PDU front panel. Page 9 © 2006, ADC Telecommunications, Inc.
  • Page 16 DIP switch to “ON”. Figure 11. Example of DIP Switch Setting on the PDU (Switches 1, 2, 3, and 6 Set to “Down” to Indicate Use of MHU Ports 1, 2, 3, and 6) Page 10 © 2006, ADC Telecommunications, Inc.

  • Page 17: Bias-T Installation

    1. Check that the power is fed into the PDU. PDU alarm output is activated if there is no DC fed in it, or if DC is out of the range (20-50 VDC) or polarity is incorrect. Page 11 © 2006, ADC Telecommunications, Inc.

  • Page 18: Troubleshooting 2-Port Cleargain Dual Duplex Tower Mounted Amplifiers

    5. Shut the transmit power OFF from the BTS, and disconnect the coaxial cable from the Antenna side of the Bias-T. Measure that the Bias-T feeds 12VDC to the MHU. 4 TROUBLESHOOTING 2-PORT CLEARGAIN DUAL DUPLEX TOWER MOUNTED AMPLIFIERS If trouble is visually indicated by LED’s or no illumination on a specific TMA, swap Bias-T cables on PDU ports to see if trouble remains or moves.
  • Page 19 ANYWHERE IN BETWEEN THE BIAS-T AND THE TMA IT MUST BE ABLE TO PASS DC. CHECK IF EXTERNAL JUMPERS OR SURGE PROTECTORS PRESENT. SHELTER HARD LINE TEST POINT Figure 13. Tower Mounted Amplifiers Page 13 © 2006, ADC Telecommunications, Inc.

  • Page 20: Troubleshooting

    3. Antenna/cable analyzer checks. Measure the in-band RL/VSWR of the system _______dB or ratio. Check distance to Fault for anomalies. Typical RL Sweep 4. Re-connect Bias-T with a T adapter. Verify voltage on the T adapter _______VDC. Normal is 13VDC. Page 14 © 2006, ADC Telecommunications, Inc.

  • Page 21: Troubleshooting Hints

    • Normal in-band RL should be greater than 14dB. If less than 14dB, check protector, feedline, jumpers and antenna. • Mark receive and transmit bands to verify correct filtering. • Check distance to fault to identify any anomalies on the feedline. Page 15 © 2006, ADC Telecommunications, Inc.

  • Page 22: Mhu Specifications

    280 x 250 x 85 mm Weight 5.5 kg Color Silver Housing Aluminum ° ° ENVIRONMENTAL Operating Temperature –40 C to +65 Outdoor Protection IP65 QUALITY MTBF < 500,000 hours Lightening Protection IEC 801-5 and IEC 1312 Page 16 © 2006, ADC Telecommunications, Inc.

  • Page 23: Dd900 Full Band Masthead Unit

    332 x 250 x 83 mm Weight 6.6 kg Color Silver Housing Aluminum ° ° ENVIRONMENTAL Operating Temperature –40 C to +65 Outdoor Protection IP65 QUALITY MTBF < 500,000 hours Lightening Protection IEC 801-5 and IEC 1312 Page 17 © 2006, ADC Telecommunications, Inc.

  • Page 24: Dd1800 Masthead Unit

    BTS Connector 7/16 DIN receptor INTERMODULATION Intermodulation –120 dBm ° ° ENVIRONMENTAL Operating Temperature –40 C to +65 Outdoor Protection IP65 QUALITY MTBF < 500,000 hours Lightening Protection IEC 801-5 and IEC 1312 Page 18 © 2006, ADC Telecommunications, Inc.

  • Page 25: Customer Information And Assistance

    Contents herein are current as of the date of publication. ADC reserves the right to change the contents without prior notice. In no event shall ADC be liable for any damages resulting from loss of data, loss of use, or loss of profits and ADC further disclaims any and all liability for indirect, incidental, special, consequential or other similar damages.

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