ADC ClearGain User Manual
ADCP-75-214
September 2006
ClearGain® 1800 MHz and 2100 MHz Dual
Inline Tower Mounted Amplifier System
User Manual
Issue 2
1383772 Rev A
ADCP-75-214 • Issue 2 • September 2006 • Preface
COPYRIGHT
© 2006, ADC Telecommunications, Inc.
All Rights Reserved
REVISION HISTORY
ISSUE DATE REASON FOR CHANGE
1 06/2006 Original
2 09/2006 Add support for 1800MHz System
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.
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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
TABLE OF CONTENTS
Content Page
ABOUT THIS MANUAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
ADMONISHMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
Certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
LIST OF ACRONYMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .vi
1 PRODUCT OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.1 General Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.2 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2 SYSTEM INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.1 Installation Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.2 Masthead Unit Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.3 PDU Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.4 Bias-T Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4 TROUBLESHOOTING 4-PORT CLEARGAIN DUAL INLINE DUAL DUPLEX TOWER MOUNTED AMPLIFIERS . . . . . . . . . . . 12
4.1 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.2 Troubleshooting Hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.3 Troubleshooting Flowchart (For Systems With Three-Port MHUs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.4 Troubleshooting Matrix. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.5 Return Loss Sweep Guide. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5 SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.1 1800 Masthead Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.2 2100 Masthead Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.3 PDU (Power Distribution Unit) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.4 Bias-T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
6 CUSTOMER INFORMATION AND ASSISTANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
ADCP-75-214 • Issue 2 • September 2006 • Preface
© 2006, ADC Telecommunications, Inc.
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ADCP-75-214 • Issue 2 • September 2006 • Preface
Blank
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© 2006, ADC Telecommunications, Inc.
ABOUT THIS MANUAL
This document describes the ADC ClearGain 1800 and 2100 MHz Dual Inline Tower Mounted
Amplifier (TMA) Systems and provides complete instructions for installing these products 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.
ADCP-75-214 • Issue 2 • September 2006 • Preface
Warn ing: 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.
CERTIFICATION
The ClearGain
requirements of EN60950.
The ClearGain
applicable CE Directives.
STANDARDS
The following is a listing of applicable regulatory standards:
Safety EN60950
EMC ETSI 300-342-2
1800 and
1800 and
2100 MHz
2100 MHz
Dual Inline TMA
Dual Inline TMA
have been tested and found to comply with the
have been tested and found to comply with all
Storage ETSI 300 019-1-1
Transport ETSI 300 019-1-2
Operation ETSI 300 019-1-4
© 2006, ADC Telecommunications, Inc.
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ADCP-75-214 • Issue 2 • September 2006 • Preface
LIST OF ACRONYMS
AISG – Antenna Interface Standards Group
ANT – Antenna
AW G – American Wire Gauge
BTS – Base Transceiver Station
LED – Light Emitting Diode
LNA – Low Noise Amplifier
MHU – Masthead Unit
OOK – On/Off Key
PDU – Power Distribution Unit
RET – Remote Electrical Tilt
RF – Radio Frequency
TMA – Tower Mounted Amplifier
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© 2006, ADC Telecommunications, Inc.
1 PRODUCT OVERVIEW
1.1 General Description
The ClearGain 1800 or 2100 MHz Dual Inline Tower Mounted Amplifier (TMA) system are
composed of some combination of three functional components: a ClearGain Power Distribution
Unit (PDU), a Masthead Unit (MHU) / Tower Mounted Amplifier (TMA), and a Bias-T.
shows where these components are located in a typical application on a communications tower.
ADCP-75-214 • Issue 2 • September 2006
Figure 1
MASTHEAD UNIT (MHU)
ClearGain
DUAL
INLINE
BIAS-T
BTS ANT
Bias-T kit
Freq: 800 - 2200MHz
Temp: -40 to +65 C
ASSEMBLED IN
Input: 5 to 24VDC
KOREA
Max Current: 2A
Date: YYYY/MM/DD
P/N: 1344027
S/N: XXXXXXXXX
DC
ClearGain PDU
G
W
R
B
- +
INPUT
NO COM NC FAIL
ALARM
RS485
BG
A
MHU
CONNECT
BASE
TRANSCEIVER
STATION
Figure 1. Functional Components of a ClearGain TMA System
OK OK OK
MHU 1 MHU 2 MHU 3
21297-B
One PDU may support up to three dual inline MHUs of the same frequency. Each MHU requires
a separate Bias-T. The ClearGain TMA system also includes power cables and alarm cables.
© 2006, ADC Telecommunications, Inc.
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ADCP-75-214 • Issue 2 • September 2006
1.2 Functional Description
The basic purpose of a ClearGain Dual Inline TMA 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 TMA system improves the performance of the BTS by providing
12dB of uplink (reverse path) gain with a low noise figure. The ClearGain TMA system
provides visual and dry contact output alarming and lightning protection. Figure 2 depicts how
the system components are involved in system function.
COAXIAL
CABLE
ANTENNA
STATION
BASE
COAXIAL CABLE
TO ANTENNA
RF SIGNALS
DC POWER
FAULT DETECTION
ANT A
BTS A
JUMPER
CABLES
ANT B
ClearGain
MHU
BTS B
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© 2006, ADC Telecommunications, Inc.
BTS ANT
Bias-T kit
Freq: 800 - 2200MHz
Temp: -40 to +65 C
ASSEMBLED IN
Input: 5 to 24VDC
KOREA
Max Current: 2A
Date: YYYY/MM/DD
P/N: 1344027
S/N: XXXXXXXXX
DC
GROUND
INPUT
G
B
- +
W
R
SITE
ALARM
NO COM NC FAIL
ALARM
POWER
RX/TX (A)
RX/TX (B)
DC POWER
FAULT DETECTION
Figure 2. System Function
ClearGain PDU
ABG
RS485 MHU 1 MHU 2 MHU 3
CONNECT
OK OK OK
MHU
21305-B
ADCP-75-214 • Issue 2 • September 2006
MHU – located as close to the antenna as possible, performs the amplifier function on the
uplink signal. Three subcomponents of the MHU, two RF cavity filters, and a Low Noise
Amplifier (LNA), are involved in the amplifier function. Downlink signal is not amplified but
passed through an RF cavity filter.
PDU
– located in the base station, provides DC current to power the LNAs and On/Off Key (OOK)
modem signal for use in the Remote Electrical Tilt (RET). 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 power onto the coaxial cable will not cause interference with signal transmission.
The PDU monitors the MHUs simultaneously by sensing their current draws. If any of the
MHUs fail, or if there is a cut or short circuit in the coaxial cable, the PDU sends 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 PDU has a connector for RET communication with the BTS. The data bus is a two-wire bidirectional configuration and can be used for RS-485 communications link between the BTS
and PDU. The OOK modem is AISG standard compliant.
Bias-T – located on the coaxial cable, is a passive device that physically injects DC power onto
the coaxial cable to provide powering for the MHU. Bias-T may be installed indoors or
outdoors. There are four Bias-T connector options:
• 7/16 DIN male to the BTS; 7/16 DIN female to the ANT
• 7/16 DIN female to the BTS; 7/16 DIN male to the ANT
• N male to the BTS; N female to the ANT
• N female to the BTS; N male to the ANT
A single PDU supports three dual inline MHUs (with one Bias-T required for each dual inline
MHU). The Bias-T may be plugged into either of the RF cables to power the MHU.
2 SYSTEM INSTALLATION
2.1 Installation Overview
Installation consists of three main steps:
1. Installing the MHU: mechanical attachment, coaxial cables and ground cable.
2. Installing the PDU: mechanical attachment, operation power, alarms and ground cable.
3. Installing the Bias-T: mechanical attachment, coaxial cables, power cable and ground cable.
2.2 Masthead Unit Installation
Pole mounting kits are provided for installing the MHU. See Figure 3. Before any installation,
check that the ClearGain MHU has no visible damages or defects. Place ClearGain MHU as
close to the antenna as possible.
© 2006, ADC Telecommunications, Inc.
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