ClearGain Tower Mounted Amplifier System 800/1900 MHz User Manual

ADCP-75-123 Issue 5 July 2004 ClearGain Tower Mounted Amplifier System 800/1900 MHz User Manual 1294153 Rev A

Preface COPYRIGHT All Rights Reserved Printed in the U.S.A. REVISION HISTORY Issue 1 04/2000 Original. Issue 2 07/2002 Updated to include dual mode systems. Issue 3 11/2002 Updated to add details to technical drawings and change mounting options. Issue 4 07/2003 Removed front and back covers. No technical changes. Issue 5 07/2004 Update Bias-T and mounting bracket drawing TRADEMARK INFORMATION ADC and ClearGain are registered trademarks of ADC Telecommunications, Inc. 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. This disclaimer of liability applies to all products, publications and services during and after the warranty period. This publication may be verified at any time by contacting ADC Technical Assistance Center at 1-800-366-3891, extension 63475 (in U.S.A. or Canada) or 952-946-3475 (outside U.S.A. and Canada), or by e-mail to bcg_tac@adc.com. ADC Telecommunications, Inc. P.O. Box 1101, Minneapolis, Minnesota 55440-1101 In U.S.A. and Canada: 1-800-366-3891 Outside U.S.A. and Canada: (952) 938-8080 Fax: (952) 946-3292 Page ii

Preface TABLE OF CONTENTS Content Page ABOUT THIS MANUAL......................................................................... v ADMONISHMENTS........................................................................... v LIST OF ACRONYMS.......................................................................... v 1 PRODUCT OVERVIEW.................................................................... 1 1.1 General Description................................................................ 1 1.2 Functional Description.............................................................. 2 1.3 System Types.................................................................... 3 1.3.1 800 Dual Duplex Fullband or 1900 Dual Duplex Fullband............................... 3 1.3.2 1900 Dual Duplex with 800 Bypass (1900 MHz Amplified Only)........................... 5 1.3.3 800/1900 Dual Duplex, Dual Band............................................... 6 1.3.4 1900 Dual Duplex with 800 Bypass (800 and 1900 MHz Both Amplified)..................... 7 1.4 MHU Dimensions.................................................................. 8 2 SYSTEM INSTALLATION.................................................................. 10 2.1 MHU Installation................................................................. 10 2.1.1 Installation of the MHU on the Mast............................................. 11 2.1.2 Installing the MHU Ground Cable............................................... 11 2.1.3 Installing Coaxial Cables.................................................... 12 2.2 PDU Installation................................................................. 12 2.2.1 Mechanical Attachment of PDU................................................ 12 2.2.2 Installation of PDU Cables................................................... 14 2.2.3 Setting the DIP Switch on the PDU.............................................. 15 2.3 Bias-T Installation................................................................ 16 2.3.1 Mechanical Attachment and Cable Connections..................................... 16 2.3.2 Additional Lightning Protection................................................ 16 3 TROUBLESHOOTING.................................................................... 17 3.1 Troubleshooting Procedure (For Systems With Two-Port MHUs)................................. 17 3.2 Troubleshooting 2-port ClearGain Dual Duplex Tower Mounted Amplifiers.......................... 17 3.2.1 Troubleshooting.......................................................... 19 3.2.2 Troubleshooting Hints...................................................... 20 3.3 Troubleshooting Flowchart (For Systems With Three-Port MHUs)................................ 20 3.4 Troubleshooting Matrix............................................................. 22 3.5 Return Loss Sweep Guide........................................................... 23 4 MHU SPECIFICATIONS................................................................... 24 4.1 DD800 Full Band Masthead Unit...................................................... 24 4.2 DD1900 Full Band Masthead Unit...................................................... 26 4.3 DD1900 Full Band With 800 Bypass Masthead Unit......................................... 27 4.4 Dual Band 800/1900 Mhz Full Band Masthead Unit.......................................... 29 5 CUSTOMER INFORMATION AND ASSISTANCE................................................... 31 Page iii

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Preface ABOUT THIS MANUAL This document describes the ADC ClearGain 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. An admonishment identifies a possible hazard and then explains what may happen if the hazard is not avoided. The admonishments in the form of Dangers, Warnings, and Cautions must be followed at all times. These warnings are flagged by use of the triangular alert icon (seen below), and are listed in descending order of severity of injury or damage and likelihood of occurrence. Danger: Danger is used to indicate the presence of a hazard that will cause severe personal injury, death, or substantial property damage if the hazard is not avoided. Warning: Warning is used to indicate the presence of a hazard that can cause severe personal injury, death, or substantial property damage if the hazard is not avoided. Caution: Caution is used to indicate the presence of a hazard that will or can cause minor personal injury or property damage if the hazard is not avoided. LIST OF ACRONYMS ANT -- Antenna (Port on MHU) BTS -- Base Transceiver Station MHU -- Masthead Unit PDU -- Power Distribution Unit RF -- Radio Frequency MHU -- Masthead Unit TMA -- Tower Mounted Amplifier Page v

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1 PRODUCT OVERVIEW 1.1 General Description The ClearGain Power Distribution Unit (PDU) 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. Figure 1 shows where these components are located in a typical application on a communications tower. MASTHEAD UNITS (MHU) FULL BAND OR BYPASS OR DUAL BAND BTS ANT 800BP BTS 1900ANT 1900ANT BTS 800ANT Bias-T ClearGain PDU (SINGLE MODE OR DUAL MODE) Power Distribution Unit + Ð INPUT NO COM NC FAIL MHU OK OK OK OK OK OK ALARM DISCONNECT MHU 1 MHU 2 MHU 3 MHU 4 MHU 5 MHU 6 17850-C BASE TRANSCEIVER STATION Figure 1. Functional Components of a ClearGain System Page 1

The MHU may be any of the three types shown. The PDU may be either single mode or dual mode. One PDU may support multiple MHUs. Each MHU requires one Bias-T. The ClearGain system also includes power cables and alarm cables. 1.2 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. The ClearGain system also provides alarming and lightning protection. Figure 2 depicts how the system components are involved in system function. As shown: ANTENNA MHU DOWNLINK FILTER/LNA COAXIAL CABLE TO ANTENNA UPLINK BASE STATION BTS ANT COAXIAL CABLE RF SIGNALS DC POWER FAULT DETECTION SITE ALARM JUMPER CABLE POWER ClearGain PDU Power Distribution Unit Bias-T MHU RX/TX + Ð INPUT NO COM NC FAIL MHU OK OK OK OK OK OK ALARM DISCONNECT MHU 1 MHU 2 MHU 3 MHU 4 MHU 5 MHU 6 GROUND DC POWER FAULT DETECTION 17860-C Figure 2. System Function Page 2

The MHU located on top of the tower, performs the amplifier function on the uplink signal. Two subcomponents of the MHU, an RF filter and a Low Noise Amplifier (LNA), are involved in the amplifier function. The downlink signal is not amplified. The PDU located in the base station, provides DC current for use in the amplifier function. The PDU outputs the DC current through a front port from which it travels by way of a short linkage cable to the Bias-T. The injection of the DC current onto the coaxial cable will not cause interference with signal transmission. The PDU also monitors the status of all MHUs simultaneously by sensing their current draws. If any of the MHUs fails, or if there is a cut or short circuit in the coaxial cable, the PDU gives an alarm to the BTS. The PDU thus also monitors the condition of the coaxial cable, not just the MHU. The PDU also has built-in lightning protection. The Bias-T located on the coaxial cable, is a passive device that physically injects the DC current onto the coaxial cable. The Bias-T injects the current into the center pin of the coaxial cable. A single PDU supports multiple MHUs (with one Bias-T required for each MHU). The number of filters/lnas supported depends on the system type. 1.3 System Types There are four types of ClearGain PDU systems. Two of these system types are single power, meaning a single bandwidth is amplified. The other two system types are dual mode, meaning two bandwidths are amplified. The four system types are described in the topics below. 1.3.1 800 Dual Duplex Fullband or 1900 Dual Duplex Fullband In this single power system, diagrammed in Figure 3, from one to six signals of the same bandwidth are amplified. The bandwidth may be 800 MHz or 1900 MHz. Page 3

MHU 3 MHU 2 MHU 1 RX TX COAXIAL CABLE TO ANTENNA LNA RX TX IF MULTIPLE BASE STATION BTS ANT JUMPER CABLE COAXIAL CABLE SITE ALARM BTS RF CONNECTION POWER ClearGain PDU (SINGLE MODE) Power Distribution Unit Bias-T MHU 1 MHU 2 MHU 3 GROUND RX/TX + INPUT NO COM NC FAIL MHU OK OK OK OK OK OK ALARM DISCONNECT MHU 1 MHU 2 MHU 3 MHU 4 MHU 5 MHU 6 17849-C Figure 3. 800 Dual Duplex Fullband or 1900 Dual Duplex Fullband Page 4

1.3.2 1900 Dual Duplex with 800 Bypass (1900 MHz Amplified Only) In this single power system, diagrammed in Figure 4, from one to six 1900 MHz signals are amplified. 800 MHz signals, if present, pass through the MHU without being amplified. 1900 ANT 800 BP MHU 3 MHU 2 MHU 1 RX TX LNA RX TX BASE STATION DC BLOCK REQ'D. SEE NOTE BYPASS 800 BP BTS 1900 ANT IF MULTIPLE COAXIAL CABLES TO ANTENNAS JUMPER CABLE COAXIAL CABLE BTS RF CONNECTION POWER SITE ALARM ClearGain PDU (SINGLE MODE) Power Distribution Unit Bias-T MHU 1 MHU 2 MHU 3 RX/TX + INPUT NO COM NC FAIL MHU OK OK OK OK OK OK ALARM DISCONNECT MHU 1 MHU 2 MHU 3 MHU 4 MHU 5 MHU 6 17851-C GROUND NOTE: The proper installation of the ADC ClearGain "1900 Dual Duplex with 800 bypass 3-Port TMA" requires a customer provided DC block. (i.e. Microlab/FXR DC Block HR-D36). If this TMA is to be used in a standalone configuration, then the DC block must be inserted between the 800BP port and the 800MHz antenna. A Single PDU Device would be required to power this TMA. The DC at this port would be used to power an existing SMARTop DD800 in a "daisy-chain" fashion that is already installed. A Dual PDU Device would be required to power the CG1900w.800bypass + a SMARTop DD800. A DC block would not be required in this configuration. Figure 4. 1900 Dual Duplex with 800 Bypass (1900 MHz Amplified Only) Page 5

1.3.3 800/1900 Dual Duplex, Dual Band The dual power system, diagrammed in Figure 5, shows from one to six 1900 MHz signals and from one to six 800 MHz signals amplified using a dual mode PDU with from one to six dual band MHUs. When using only a single frequency service the inactive service side must be terminated until dual band operation is established. Attach a standard 50 Ohm load to the TTA connector that does not have a coax jumper routed to an antenna. 1900 ANT 800 ANT MHU 3 MHU 2 MHU 1 TX RX RX TX LNA LNA TX RX RX TX IF MULTIPLE BASE STATION 1900 ANT BTS 800 ANT COAXIAL CABLES TO ANTENNAS JUMPER CABLE COAXIAL CABLE SITE ALARM BTS RF CONNECTION POWER ClearGain PDU (DUAL MODE) Power Distribution Unit Bias-T MHU 1 MHU 2 MHU 3 + Ð INPUT NO COM NC FAIL MHU OK OK OK OK OK OK ALARM DISCONNECT MHU 1 MHU 2 MHU 3 MHU 4 MHU 5 MHU 6 GROUND RX/TX 17861-C Figure 5. 800/1900 Dual Duplex, Dual Band Page 6

1.3.4 1900 Dual Duplex with 800 Bypass (800 and 1900 MHz Both Amplified) In this dual power system, diagramed in Figure 6, from one to six 1900 MHz signals and from one to six 800 MHz signals are amplified using a dual mode PDU, from one to six bypass MHUs, and from one to six fullband MHUs (which are presumed to already exist on the tower). 1900 ANT 800 BP MHU 3 MHU 2 MHU 1 EXISTING MHU RX TX LNA RX TX BYPASS IF MULTIPLE BASE STATION 800 BP BTS 1900 ANT COAXIAL CABLES TO ANTENNAS JUMPER CABLE COAXIAL CABLE SITE ALARM BTS RF CONNECTION POWER ClearGain PDU (DUAL MODE) Power Distribution Unit Bias-T MHU 1 MHU 2 MHU 3 + Ð INPUT NO COM NC FAIL MHU OK OK OK OK OK OK ALARM DISCONNECT MHU 1 MHU 2 MHU 3 MHU 4 MHU 5 MHU 6 GROUND RX/TX 17862-C Figure 6. 1900 Dual Duplex with 800 Bypass (1900 and 800 MHz Both Amplified) Page 7

1.4 MHU Dimensions 9.75 IN. (24.8 CM) ClearGain 13.1 IN. (33.2 CM) 800 Dual Duplex 2-Port TMA BTS ANT 3.25 IN. (8.3 CM) 17876-B Figure 7. 800 Fullband MHU Dimensions 11.2 IN. (28.5 CM) ClearGain 12.5 IN. (31.8 CM) 1900 Dual Duplex 2-Port TMA BTS 1900ANT 2.7 IN. (6.9 CM) 17877-B Figure 8. 1900 Fullband MHU Dimensions Page 8

11.2 IN. (28.5 CM) ClearGain 12.5 IN. (31.8 CM) 1900 Dual Duplex with 800 bypass 3-Port TMA 800BP BTS 1900ANT 2.7 IN. (6.9 CM) 17879-A Figure 9. 1900 With 800 Bypass MHU Dimensions 11.2 IN. (28.4 CM) ClearGain 13.1 IN. (33.3 CM) 800/1900 DUAL BAND DUAL DUPLEX 3-PORT TMA 1900ANT BTS 800ANT 5.75 IN. (14.6 CM) 17863-A Figure 10. 800/1900 Dual Band MHU Dimensions Page 9

2 SYSTEM INSTALLATION Installation consists of three main steps: 1. Installing the MHU: mechanical attachment, coaxial cables, ground cable. 2. Installing the Bias-T: mechanical attachment, coaxial cables, power cable. 3. Installing the PDU: mechanical attachment, operation power, and alarms. 2.1 MHU Installation Each ClearGain Tower Top Amplifier (TTA) or Mast Head Unit (MHU) includes a bracket kit, ground cable and hardware for proper installation on a tower. U-bolts are provided for mounting the MHU. Figure 11 provides an exploded view. The kit may be used for tube diameter 30-140 mm (1.18-5.51 in.). ClearGain 16775-B ANY ClearGain MHU (DETAILS VARY) Figure 11. MHU Long Bolt Mounting Bracket Kit Components Page 10

2.1.1 Installation of the MHU on the Mast Note: All hardware is specified in metric units. Before any installation, check that the ClearGain MHU has no visible damages or defects. Note: The ClearGain MHU must always be installed so that the connectors point downward. Not more than a 45-degree installation angle is recommended. 1. Place the MHU so that you can attach the bracket parts into the unit. Note: The threads are sensitive to damages. 2. Place one half of the bracket (the half with the lifting hook) behind the MHU using two M8 bolts or long bolts. 3. Fasten the long screws, nuts, washers, and brackets. 4. Before you go up to the mast, verify that you have the remaining washers and nuts with you. Temporarily remove the connector protector plugs, inspect the 7/16 DIN connectors for damage, and return the connector protector plugs. 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. 2.1.2 Installing the MHU Ground Cable Good grounding of the ClearGain MHU is important to protect the unit against voltage surges. These surges could be caused by, for example, lightning. Install the ground cable as follows: 1. Connect the ground cable to MHU side using M5 attachment screw and washer. 2. Connect the other end of the cable to a good ground (site ground) with a reliable joint. GROUNDING and BONDING CONSIDERATIONS Grounding is very important in tower applications. Shipped with each MHU, is a #6 AWG, 3-foot ground cable with single hole crimp lug connectors on both ends. Installation hardware is provided to attach one end to the MHU. Keep ground wire as short and direct (no loops or knots) as possible, secure it to a good ground point (metal to metal). Following local grounding practices the single hole lug is usually re-terminated by the tower crew with a double hole lug and bolted to a dedicated tower ground bus. In the absence of a dedicated ground, the tower structure itself can be used by using a exothermic weld joint (not very common) or a mechanical ground clamp. If a clamp is used, it must be very tight and protected from corrosion effects with a corrosion preventative compound. It is recommended that the ground integrity/resistance at any mechanical junction be checked during periods of regular tower maintenance. If ground cable length is too short, customer may make a longer ground cable (#6 AWG) as long as all the mechanical connections are tight and clean. Page 11

2.1.3 Installing Coaxial Cables Caution: Before connecting any coaxial cables, ensure that the BTS transmitter output is turned off and that precautions are taken to ensure that the transmitter cannot be activated during the equipment installation. Two short coaxial jumpers should be pre-made. One will connect the BTS port to the hardline and the other will connect the ANT port to the antenna. Most installations require two good quality flexible coax jumpers, normally terminated with 7/16DIN-7/16DIN plug connectors. Check gender of hardline and check if Antenna pigtail is present, adjust accordingly for a correct match. The coaxial feeder that runs from the base station should be hooked to the BTS port of the MHU using jumper cable. The reason for the jumper cable is to ensure that mechanical forces caused by temperature change will not damage the MHU connectors. Tighten the connectors to 25 30 Nm (18.43 22.13 ft-lbs.) torque. To improve the reliability of the connection, the connector joint can be protected. This can be done, for example, by installing specific weatherproof tape over the cable connectors. Loose cable should be fixed to the tower using cable brackets. 2.2 PDU Installation 2.2.1 Mechanical Attachment of PDU Warning: Never install the Power Distribution Unit in a wet location or during a lightning storm. When installing or modifying communication lines, disconnect lines at the interface before working with uninsulated lines or terminals to prevent electrical shock. The PDU should be mounted in accordance with local code using appropriate hardware (customer provided). The PDU has two mounting holes on either side, as shown in Figure 12. Below are guidelines for standard wall mount, masonry wall mount, and rack mount of the PDU. 2.2.1.1 Standard Wall Mount When mounting the PDU on a wooden or metal surface, it is recommended that it be installed on pressure-treated plywood (customer provided) with a minimum thickness of 0.75-inch (19.0 cm). The plywood should be firmly secured to the wall studs. 2.2.1.2 Masonry Wall Mount 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. Page 12

Power Distribution Unit + INPUT COM ALARM FAIL MHU DISCONNECT MHU 1 OK NO NC OK OK OK OK OK MHU 2 MHU 3 MHU 4 MHU 6 16772-A MHU 5 Figure 12. Example of PDU Standard Wall Mount 2.2.1.3 Rack Mount A mounting bracket, shown in Figure 13, 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 PDU 18223-A Figure 13. PDU Rack Mount Bracket Page 13

2.2.2 Installation of PDU Cables There are three PDU cables: the ground cable, the alarm cable, and the power cable. Figure 14 shows the cable terminations on the front of the PDU. Connect the cables as follows: Figure 14. Cable Terminations on Front of PDU (Left to Right: Power Cable, Alarm Cable, Three MHU Cables, Ground Cable) 1. Connect the ground cable under the grounding screw on the PDU front panel. Connect the other end of the cable to the site grounding pole. 2. Connect the alarm cable leads to the base station or site alarm system. Use either Normally Open or Normally Closed contacts. Figure 15 shows the PDU alarm logic 3. Connect the other end of the alarm cable to the PDU ALARM connector. 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 14

POWER DISTRIBUTION UNIT ALARM RELAY PDU ALARM LOGIC DC INPUT OUTPUTS 16773-A NO (NORMALLY OPEN) COM (COMMON) NC (NORMALLY CLOSED) Figure 15. PDU Alarm Logic 2.2.3 Setting the DIP Switch on the PDU The PDU has a DIP switch to disconnect unused MHU outputs (see Figure 16). For the MHU outputs that are used, the DIP switch must be in the down position. Unused outputs must be disconnected by setting the DIP switch to ON. Figure 16. 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 15

2.3 Bias-T Installation 2.3.1 Mechanical Attachment and Cable Connections Caution: Prior to installing any Bias-T unit, ensure that the BTS transmitter output is turned off and that precautions are taken to ensure that the transmitter cannot be activated during the equipment installation. The BIAS-T is designed to fasten directly into BTS coax-connector or directly to the feeder cable. There is no additional mounting hardware required. The Bias-T can be installed inside or outside. Connect the Bias-T as follows: 1. Connect the ground cable to the Bias-T grounding pole (see Figure 17). Bias-T GROUND LOCATION 19729-A Figure 17. Bias-T Ground Cable Connection 2. Connect the other end of the ground cable to the site grounding pole. 3. Connect the BIAS-T BTS connector directly into the BTS coax-connector. 4. Connect the coaxial run going to the MHU to the ANT port of the BIAS-T. 5. Connect the mini coax cable to the SMB connector of the BIAS-T unit. 6. Connect the other end of the mini coax cable to the PDU front panel SMB connector TMA1 6 (whichever is being used). 2.3.2 Additional Lightning Protection If operator chooses to install further lightning protection between the MHU and Bias-T, it must allow the DC voltage to pass through the lightening protector. Page 16

3 TROUBLESHOOTING Refer to Subsection 3.1 for any a fullband system with one or more two-port MHUs. For any other system configuration, refer to Subsection 3.3. 3.1 Troubleshooting Procedure (For Systems With Two-Port MHUs) Use this procedure to troubleshoot any fullband system with one or more two-port MHUs. When something is wrong with the system, the red alarm LED on the PDU is activated and the PDU alarm output is activated. In such a case, troubleshoot for problems as follows: 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. 2. Every output has a green LED, and it must be on if the output is used. Check that all the green LED s on the used outputs are on. 3. If one of the used outputs has a LED off, there is something wrong with the PDU, Bias-T, MHU, or the feeder cable. 4. Disconnect the mini coaxial cable from the PDU and measure from the connector, that the PDU feeds 12VDC to the Bias-T. Do this measurement using a multimeter (Voltage measurement, DC). If there is 11-13 VDC found from the connector, there is something wrong with the Bias-T, MHU, or cables. 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 18VDC to the MHU. 3.2 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. Reference Figure 18. Page 17

ORIENT THE TMA SO THE RF CONNECTORS POINT TOWARDS THE GROUND. FEEDLINE JUMPER HARD LINE ANTENNA JUMPER COMMON FAILURE POINTS ARE THE ANTENNA AND FEEDLINE JUMPERS/CONNECTIONS. IF A SURGE PROTECTOR IS 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 18. Tower Mounted Amplifiers Page 18

3.2.1 Troubleshooting 1. Observe and record PDU LED status. Disable or disconnect RF from BTS. Remove any surge protectors. Disconnect Bias-T from the antenna feedline/hardline/jumper/protector. +$5' /,1( 685*( 3527(&725 3'8 2. Multimeter checks: a. Measure voltage on the Bias-T VDC. Normal is 13VDC. 3'8 b. Measure resistance of the feedline Ohms. Normal is High or Very high Ω (KΩ/ΜΩ). +$5' /,1( 3. Antenna/cable analyzer checks. Measure the in-band RL/VSWR of the system db or ratio. Check distance to Fault for anomalies. ÃÃ G% Typical RL Sweep 4. Re-connect Bias-T with a T adapter. Verify voltage on the T adapter VDC. Normal is 13VDC. Page 19

HARD LINE PDU PDU DC supply (18-56 VDC with 5A fuse/breaker). 5. Re-connect to original configuration and return to service. PDU should illuminate a green LED for each active TMA if there are no faults in the system. 6. Check with operators for improved performance. 3.2.2 Troubleshooting Hints If voltage is outside of the normal range, trace it back towards the fault. If no resistance or low resistance, check protector, feedline, jumpers and TMA. If high resistance, check to see if TMA is installed or for a discontinuity up to the TMA. 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. 3.3 Troubleshooting Flowchart (For Systems With Three-Port MHUs) Use the following flowchart to troubleshoot any system with one or more three-port MHUs. If directed by the flowchart, refer to the troubleshooting matrix in Subsection 3.4 or to the return loss sweep guide in Subsection 3.5. Page 20

START ANY LIGHTS ON THE PDU? YES NO CHECK SUPPLY IS 20 TO 56Vdc. The red lead is connected to the higher potential. CHECK SUPPLY FUSE/BREAKER IS OK. (5A RATING. CHECK DC CABLE AND CONNECTION.PROBLEM The red Fail led should come on when any MHU select dip switch is pushed to the down position. If the bias-t connection is not made. RED FAIL led OFF OFF MHU led YELLOW SOLID YELLOW FLASHING RESISTANCE PROBLEM FLICKERING RED FLICKERING GREEN MHU led GREEN OFF The red Fail led should come on when any MHU select dip switch is pushed to the down position. If the bias-t connection is not made. CHECK DC CONNECTIVITY TO THE MHU/TTA. PDU OR CONNECTIVITY PROBLEM WRONG CONFIGURATION OR 800MHz LNA FAULTY WRONG CONFIGURATION OR 1900MHz LNA FAULTY REFER TO TROUBLESHOOTING MATRIX (SUBSECTION 3.3) TTA ACTIVE NOTE: The proper installation of the ADC ClearGain "1900 Dual Duplex with 800 bypass 3-Port TMA" requires a customer provided DC block. (i.e. Microlab/FXR DC Block HR-D36). If this TMA is to be used in a standalone configuration, then the DC block must be inserted between the 800BP port and the 800MHz antenna. A Single PDU Device would be required to power this TMA. CHECK MHU PORT FOR 18Vdc. IF NOT PRESENT, REPLACE PDU. CHECK BIAS-T CABLE FOR 18Vdc. IF NOT PRESENT, REPLACE BIAS-T CABLE. CHECK BIAS-T FOR 18Vdc. IF NOT PRESENT, REPLACE BIAS-T. CHECK RESISTANCE OF FEEDLINE. - LO OHMS OR SHORTED; PROBLEM TOP SIDE. - HI OHMS OR OPEN IS NORMAL BUT ALSO MAY INDICATE A DISCONTINUITY. CHECK RETURN LOSS. (SUBSECTION 3.4) CHECK DISTANCE TO FAULT. CHECK FEEDLINE VOLTAGE. The DC at this port would be used to power an existing SMARTop DD800 in a "daisy-chain" fashion that is already installed. A Dual PDU Device would be required to power the CG1900w.800bypass + a SMARTop DD800. A DC block would not be required in this configuration. 18224-A Page 21

3.4 Troubleshooting Matrix CLEARGAIN MHU TYPE If directed in Subsection 3.3 to consult a troubleshooting matrix, select from the tables below based on whether the system being analyzed has a single mode or dual mode PDU. Note: ClearGain PDU DIP switches must be in the down position for each active MHU! Note: ClearGain PDU input voltage must be in the range 20-56 VDC. Table 1. Single Mode PDU FAIL LED MHU LED STATUS EXPLANATION ACTION DD1900 with 800 Red Off By-pass No Bias-T or faulty connection Check 18 VDC bypass Off Green (solid) OK MHU operational Red Yellow (flashing) Failed No DC block* on 800 port Check DC block Red Off Failed LNA failure. MHU in bypass Replace TTA Dual band 1900 & 800 Red Off Failed Wrong configuration* Change PDU DD1900 w/800 bypass & SmartTop DD800 Red Off Failed Wrong configuration* Change PDU CLEARGAIN MHU TYPE * The correct configurations for a singlemode PDU system are: single TTA only; or ClearGain DD1900 with 800 bypass plus a DC block to the 800 antenna. Table 2. Dual Mode PDU FAIL LED MHU LED STATUS EXPLANATION ACTION Dual band 1900 & 800 Red Off By-pass No Bias-T or faulty connection Check 18 VDC Off Green (solid) OK MHU operational Red Yellow (solid) Failed 800 LNA failure Replace TTA Red Yellow (flashing) Failed 1900 LNA failure Replace TTA Red Off Failed Total failure. LNA s in bypass Replace TTA DD1900 with 800 bypass Red Yellow (solid) Failed Wrong configuration with DC block Change PDU DD1900 with 800 bypass & SMARTop DD800 Red Yellow (flashing) Failed Wrong configuration without DC block Change PDU Off Green (Solid) OK MHU operational * The correct configurations for a dual PDU system are: dual band ClearGain MHU only; or ClearGain DD1900 with 800 bypass plus a DC block to the 800 antenna. Page 22

3.5 Return Loss Sweep Guide If directed in Subsection 3.3 to check return loss sweep guide, refer to the examples provided below in Figure 19. RETURN LOSS SWEEP GUIDE FOR THE RECEIVE SECTION OF THE MHUs. 0-5 -10-15 GOOD BAD RL db -20-25 -30-35 -40-45 v1 v2 v1 v2 NORMAL IN-SYSTEM SWEEP. TYPICAL. DEGRADATION FROM NORMAL SYSTEM SWEEP. RL IS STILL GOOD IN RX BAND. RECOMMEND CONNECTOR/LINE/ANTENNA CHECKS DURING NEXT SCHEDULED MAINTENANCE PERIOD WHEN TOWER CREW AVAILABLE. RESISTANCE LOOKING INTO THE FEEDLINE SHOULD INDICATE HIGH OR INFINITE OHMS. 0-5 -10-15 GOOD BAD RL db -20-25 -30-35 -40-45 v1 v2 v1 v2 ANTENNA PORT: TERMINATED WITH 50 OHM LOAD. "PERFECT ANTENNA" < 50 OHM LOAD > ANTENNA PORT: ANTENNA CATASTROPHICALLY FAILED "OPEN". ANTENNA PORT: ANTENNA CATASTROPHICALLY FUSED "SHORT". 18270-A Figure 19. Return Loss Sweep Guide Page 23

4 MHU SPECIFICATIONS As shown in Figure 1 on page 1, three types of Mastheads Units may be used in a ClearGain system: Full band Bypass Dual band The following subsections provide specifications for each MHU type. 4.1 DD800 Full Band Masthead Unit Table 3 provides specifications for the DD800 Full Band Masthead Unit. Table 3. DD800 Full Band Masthead Unit CATEGORY PARAMETER SPECIFICATION Electrical Nominal impedance of RF input and 50 Ohm outputs Frequency Range TX 869 894 MHz RX 824 849 Mhz Passband (RX) Gain 12 db Noise Figure 1.5 db Dynamic Range Input at 1 db compression: 0 dbm IIP3 +13 dbm Max Input Power +10 dbm 851 MHz Rejection <30 db Bypass Insertion Loss 2.0 db Isolation in TX Path 80 db Rejection 1850 1998 MHz 80 db Insertion Loss of TX Path (TX to 0.4 db Antenna) Passband Return Loss TX Band >18 db RX Band >18 db Intermodulation 120 dbm Maximum Input Power (RMS Power) 500 W Tx Rejection in Rx Band 40 db Power Operational Voltage 7 to 15 Vdc Operational Current 140 ± 10 ma Alarm Current Level 350 ± 10 ma Page 24

Table 3. DD800 Full Band Masthead Unit CATEGORY PARAMETER SPECIFICATION Physical Dimensions (HxWxD) 332 x 250 x 84 mm (13.1 x 9.8 x 3.3 in) Weight 7.2 kg Color Silver Housing Aluminum Connectors Antenna Connector 7/16 DIN receptor BTS Connector 7/16 DIN receptor Environmental Operating Temperature 40 C to +60 C Lightning Protection IEC 61000-4-5 Vibration Storage ETS3019-1-1 Transport ETS3019-1-2 Operation ETS3019-1-3 Regulatory EMC ETS300 342-2 Approvals FCC Part 15, Class A UL 1950 Quality MTBF 900,000 hours Page 25

4.2 DD1900 Full Band Masthead Unit Table 4 provides specifications for the DD1900 Full Band Masthead Unit. Table 4. DD1900 Full Band Masthead Unit CATEGORY PARAMETER SPECIFICATION Electrical Nominal impedance of RF input and outputs 50 Ohm Frequency Range TX 1930 1990 MHz RX 1850 1910 Mhz Passband (RX) Gain 12 db Noise Figure 1.6 db Dynamic Range Input at 1 db compression: +3 dbm IIP3 +13 dbm Max Input Power +10 dbm 1915 MHz Rejection <15 db 1916 MHz Rejection <30 db Bypass Insertion Loss 2.0 db Isolation in Tx Path 80 db Rejection 824 894 MHz 80 db Insertion Loss of TX Path (TX to Antenna) 0.4 db Passband Return Loss TX Band >18 db RX Band >18 db Intermodulation 120 dbm Maximum Input Power (RMS Power) 250 W Tx Filter Rejection in Rx Band 40 db Power Operational Voltage 7 to 15 Vdc Operational Current 140 ± 10 ma Alarm Current Level 350 ± 20 ma Physical Dimensions (HxWxD) 297 x 287 x 70 mm (11.7 x 11.3 x 2.8 in) Weight 7 kg Color Silver Housing Aluminum Connectors Antenna Connector 7/16 DIN receptor BTS Connector 7/16 DIN receptor Environmental Operating Temperature 40 C to +60 C Lightning Protection IEC 61000-4-5 Page 26

Table 4. DD1900 Full Band Masthead Unit CATEGORY PARAMETER SPECIFICATION Vibration Storage ETS3019-1-1 Transport ETS3019-1-2 Operation ETS3019-1-3 Regulatory EMC ETS300 342-2 Approvals FCC Part 15, Class A UL 1950 Quality MTBF 900,000 hours 4.3 DD1900 Full Band With 800 Bypass Masthead Unit Table 5 provides specifications for the DD1900 Full Band With 800 Bypass Masthead Unit. Table 5. DD1900 Full Band With 800 Bypass Masthead Unit CATEGORY PARAMETER SPECIFICATION Electrical Nominal impedance of RF input and outputs 50 Ohm Frequency Range TX 1930 1990 MHz RX 1850 1910 Mhz Passband (RX) Gain 12 db Noise Figure 1.6 db Dynamic Range Input at 1 db compression: +3 dbm IIP3 +15 dbm Insertion Loss of TX Path (TX to 0.4 db Antenna) 1915 MHz Rejection <15 db 1916 MHz Rejection <30 db Bypass Insertion Loss 2.0 db Isolation in Tx Path 80 db Rejection 824 894 MHz 80 db Max Input Power +10 db Passband Return Loss TX Band >18 db RX Band >18 db Intermodulation 120 dbm Maximum Input Power (RMS Power) 250 W Power Operational Voltage 7 to 20 Vdc Operational Current 140 ± 10 ma Alarm Current Level 350 ± 20 ma Page 27

Table 5. DD1900 Full Band With 800 Bypass Masthead Unit CATEGORY PARAMETER SPECIFICATION Physical Dimensions (HxWxD) 297 x 287 x 70 mm (11.7 x 11.3 x 2.8 in) Weight 7 kg Color Silver Housing Aluminum Connectors Antenna Connector 7/16 DIN receptor BTS Connector 7/16 DIN receptor Environmental Operating Temperature 40 C to +60 C Lightning Protection IEC 61000-4-5 Vibration Storage ETS3019-1-1 Transport ETS3019-1-2 Operation ETS3019-1-3 Regulatory EMC ETS300 342-2 Approvals FCC Part 15, Class A UL 1950 Quality MTBF 900,000 hours Page 28

4.4 Dual Band 800/1900 Mhz Full Band Masthead Unit Table 6 provides specifications for the Dual Band 800/1900 Mhz Full Band Masthead Unit. Table 6. Dual Band 800/1900 MHz Full Band Masthead Unit CATEGORY PARAMETER SPECIFICATION Electrical Nominal impedance of RF inputs and outputs 50 Ohm Frequency Range TX 800 869 894 MHz TX 1900 1930 1990 MHz RX 800 824 849 Mhz RX 1900 1850 1910 Mhz Filter Bandwidth 25/60 MHz Passband (RX) Gain 12 db Noise Figure (800) 1.5 db Noise Figure (1900) 1.6 db Dynamic Range Input at 1 db compression: +0 dbm IIP3 +13 dbm Max Input Power +10 dbm 851 MHz Rejection <30 db 1915 MHz Rejection <15 db 1916 MHz Rejection <30 db Bypass Insertion Loss 2.0 db Isolation in Tx Path 80 db Insertion Loss of TX Path (TX to Antenna) 0.4 db Passband Return Loss TX Band >18 db RX Band >18 db Intermodulation 120 dbm Maximum Input Power (RMS Power) 800 MHz: 500 W; 1900 MHz: 250 W Tx Filter Rejection in RX Path 40 db Power Operational Voltage 7 to 20 Vdc Operational Current 280 ± 10 ma Alarm Current Level 350 520 ma Physical Dimensions (HxWxD) 357 x 287 x 149 mm (14.1 x 11.3 x 5.9 in) Weight 13 kg (28.66 lbs.) Color Silver Housing Aluminum Connectors Antenna Connector 7/16 DIN receptor BTS Connector 7/16 DIN receptor Environmental Operating Temperature 40 C to +60 C Lightning Protection IEC 61000-4-5 Page 29

Table 6. Dual Band 800/1900 MHz Full Band Masthead Unit CATEGORY PARAMETER SPECIFICATION Vibration Storage ETS3019-1-1 Transport ETS3019-1-2 Operation ETS3019-1-3 Regulatory EMC ETS300 342-2 Approvals FCC Part 15, Class A UL 1950 Quality MTBF 900,000 hours Page 30

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