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Andrew 2400 Operation And Maintenance Manual

Distribution line amplifier
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OPERATION AND MAINTENANCE MANUAL
For the
MODEL 2400
DISTRIBUTION LINE AMPLIFIER
MANUAL NO. 385700-4006
REVISION 6
The information set forth in this document and all rights in and to inventions
disclosed herein, and patents which might be granted thereon disclosing,
employing or covering the materials, methods, techniques or apparatus
described herein are the exclusive property of Andrew Corporation.
This document is an operation and maintenance manual. No disclosure or
reproduction of the information or drawings shall be made of any other
purpose without the prior written consent of Andrew. Use of the information
contained herein to fabricate or assemble any item in whole or in part is
expressly prohibited
.
2601 Telecom Parkway, Richardson, Texas 75082-3521
TEL (972) 952 9700 FAX (972) 952-0000

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  • Page 1 This document is an operation and maintenance manual. No disclosure or reproduction of the information or drawings shall be made of any other purpose without the prior written consent of Andrew. Use of the information contained herein to fabricate or assemble any item in whole or in part is...

  • Page 2: Safety Summary

    385700-4006-006 SAFETY SUMMARY SAFETY SUMMARY High voltage is used in the operation of this equipment. Death on contact may result, if personnel fail to observe the following safety precautions: • Do not be misled by the term “Low Voltage.” Potentials as low as 50 Volts may cause death under adverse conditions.
  • Page 3 385700-4006-006 LIST OF ABBREVIATIONS AND ACRONYMS WARNING The Distribution Line Amplifier is an unlicensed device operating under the conditions of FCC part 15 regulations. This equipment is intended to be installed and operated by professional parties. It is the responsibility of those parties to insure that the equipment is operated in compliance with the applicable FCC part 15 specifications.
  • Page 4 385700-4006-006 LIST OF REFERENCE DOCUMENTS LIST OF REFERENCE DOCUMENTS Andrew Catalog 37 (or latest version) Drawings: Assembly, Line Amplifier 385700-4000 Document use is restricted to that described on cover...

  • Page 5: Table Of Contents

    385700-4006-006 TABLE OF CONTENTS TABLE OF CONTENTS CHAPTER 1............................1-4 GENERAL MANUAL INFORMATION..................1-4 PREPARATION FOR STORAGE OR SHIPMENT ..............1-4 1.2.1 Storage..........................1-4 1.2.2 Shipment ........................... 1-4 DESCRIPTION OF EQUIPMENT ....................1-5 1.3.1 Type of Equipment ......................1-5 1.3.2 Purpose of the Equipment....................1-5 LOCATIONS AND DESCRIPTIONS OF MAJOR COMPONENTS ...........
  • Page 6 385700-4006-006 TABLE OF CONTENTS CHAPTER 3............................3-1 WIRING PROTECTION AND GROUNDING................3-1 STARTUP AND SHUTDOWN PRODECURES................. 3-2 3.2.1 DLA Startup........................3-2 3.2.2 Normal Operation ......................3-2 3.2.3 Shutdown .......................... 3-2 CHAPTER 4............................4-1 TROUBLESHOOTING....................... 4-1 CORRECTIVE MAINTENANCE ....................4-2 4.2.1 Remove and Replace DLA....................4-2 TEST PROCEDURES .......................
  • Page 7 385700-4006-006 TABLE OF CONTENTS LIST OF FIGURES Figure 1-1 Distribution Line Amplifier (4 port)............... 1-6 Figure 1-2 DLA Block Diagram .................... 1-8 Figure 1-3 DLA Internal View ....................1-9 Figure 2-1 DLA Forward Direction Interconnect Diagram............. 2-3 Figure 2-2 DLA Forward Direction Interconnect Diagram............2-4 Figure 2-3 DLA Input VAC Pin-outs ..................

  • Page 8: General Manual Information

    385700-4006-006 INTRODUCTION CHAPTER 1 INTRODUCTION 1.1 GENERAL MANUAL INFORMATION This manual contains instructions for the operation, maintenance, and support of the Distribution Line Amplifier (DLA) assembly. This manual describes the amplifier assembly in detail. It provides the necessary information for qualified technical personnel to install, repair, and maintain the Distribution Line Amplifier to the line replaceable unit (LRU).

  • Page 9: Description Of Equipment

    The DLA is a FCC approved bi-directional amplifier that is used with spread spectrum transceivers that operate in the ISM 2400-2483.5 MHz frequency band. The 4 versions of the DLA are shown in Table 1-1. The models differ in the number of RF ports and the type of control interface.

  • Page 10: Locations And Descriptions Of Major Components

    Figure 1-1 Distribution Line Amplifier (4 port) 1.4.1 Distribution Line Amplifier Principles of Operation The bi-directional Distribution Line Amplifier operates within two sub-regions of the 2400 – 2483.5 MHz ISM band. It filters and amplifies at the BDR center frequency of 2416.64 MHz.
  • Page 11 385700-4006-006 INTRODUCTION power level alarm as well as an output power alarm. The alarm levels are user adjustable. The MDR path is also referred to as the LNA channel or channel 2. The LNA channel is referenced to a pilot tone within the Distribution Line Amplifier. The pilot tone is used (1) to set the gain of the LNA channel and (2) to provide a method of detecting a faulty LNA module.

  • Page 12: Figure 1-2 Dla Block Diagram

    385700-4006-006 INTRODUCTION Transfer Relay RF Lightning RF Lightning Radiax Radiax Protection Protection Direction Control Direction Status +12 VDC Radiax Alarm PA Alarm Detector Detector Diplexer Diplexer +12 VDC LNA Alarm Detector Pilot Tone Generator -10 dBm +12 VDC AC-DC Power Supply Alarm &...

  • Page 13: Distribution Line Amplifier Major Components

    385700-4006-006 INTRODUCTION 1.4.2 Distribution Line Amplifier Major Components Refer to Figure 1-3 DLA Internal View for locations of major DLA components. The test point locations, Pilot Tone Output J3 on the Pilot Tone Board and Alarm and Control Interface Board Test Points J4, shown in Figure 1-3 are used for initial DLA adjustments and referenced later in this manual in section 2.5.

  • Page 14: Equipment Characteristics

    385700-4006-006 INTRODUCTION 1.5 EQUIPMENT CHARACTERISTICS Refer to Table 1-2 Distribution Line Amplifier Specifications. The table contains the specifications for the DLA. The table includes characteristics and specifications in three categories: technical, environmental, and physical. 1.5.1 Power and Utility Requirements The DLA operates across an AC input range of 87 to 265 VAC. No user adjustment is required.

  • Page 15: Table 1-2 Distribution Line Amplifier Specifications

    385700-4006-006 INTRODUCTION Electrical Specifications Channels Channel 1, MHz 2416.64 ± 13.5 MHz Channel 2, MHz 2467.86 ± 13.5 MHz Input and Output Impedance, ohms 50 Channel 1 (PA channel) input power -15 dBm to +5 dBm output power, adjustable +15 to +30 dBm (2 port amplifier) +12 to +27 dBm (4 port amplifier) input signal alarm, adjustable -10 dBm nominal...

  • Page 16: Chapter 2

    Check equipment for bent frames, protrusions, and dents. Pay close attention to external brackets, controls and connectors, because they are especially susceptible to damage during shipment. If you find damage to the equipment, notify Andrew Corporation’s Customer Service Center at: • 1-800-255-1479 (Inside the USA) • 708-873-2307 (Outside the USA) 2.1.2 Proper Installation of Units...

  • Page 17: Reverse Direction Configuration Interconnection

    DLA Forward Direction Interconnect Diagram for a typical 4 port configuration. For 2 port configurations, J5 and J6 ® are not connected. Refer to Andrew Catalog, -- HELIAX Coaxial Cable – for cable and connector information. Connect a nominal 120 VAC power source to the DLA connector panel POWER IN (J1) port.

  • Page 18: Figure 2-1 Dla Forward Direction Interconnect Diagram

    385700-4006-006 INSTALLATION FORWARD CONFIGURATION : DIRECTION CONTROL = NORMAL USER Control Equipment ® RADIAX ® RADIAX ALARM/CONTROL NORM PA ALARM/CONTROL NORM PA OUT2 OUT2 ® ® HELIAX ® HELIAX HELIAX NORM PA OUT1 NORM PA OUT1 NORM PA IN NORM PA IN LNA IN LNA IN BDR 1...

  • Page 19: Figure 2-2 Dla Forward Direction Interconnect Diagram

    385700-4006-006 INSTALLATION USER Control Equipment ® RADIAX ® RADIAX ALARM/CONTROL NORM PA ALARM/CONTROL NORM PA OUT2 OUT2 ® ® HELIAX HELIAX ® HELIAX NORM PA OUT1 NORM PA OUT1 NORM PA IN NORM PA IN LNA IN LNA IN BDR 1 LNA OUT LNA OUT BDR 2...

  • Page 20: Figure 2-3 Dla Input Vac Pin-Outs

    385700-4006-006 INSTALLATION 2.3.1 Connector Pin-outs Refer to Figures Figure 2-3 and Figure 2-4 for the connector pin-out information for the Distribution Line Amplifier ports. Figure 2-3 DLA Input VAC Pin-outs shows the pin assignments for the Distribution Line Amplifier POWER IN connector. The DLA Power Connector is a MIL-C-26482, Series 2 connector.

  • Page 21: Figure 2-4 Dla Alarm/Control Port Pin-Outs

    385700-4006-006 INSTALLATION Figure 2-4 DLA ALARM/CONTROL Port Pin-outs, shows the pin assignments for the Distribution Line Amplifier ALARM/CONTROL connector. Figure 2-4 DLA ALARM/CONTROL Port Pin-outs The Alarm/Control connector is a MIL-C-26482, Series 1 connector. The part is MS3124E20- 16P, KPSE07E20-16P, or equivalent. The mating connectors are MS3126F20-16S, KPSE06F20-16S, or equivalent.

  • Page 22: Distribution Line Amplifier Component Jack Locations

    385700-4006-006 INSTALLATION 2.4 DISTRIBUTION LINE AMPLIFIER COMPONENT JACK LOCATIONS The following paragraphs describe the purpose and location of the jacks for the Distribution Line Amplifier. Refer to Figure 2-5 DLA Assembly Jack Locations. The amplifier connector panel contains one data jack, ALARM/CONTROL (J2). The DLA exchanges status and control signals with USER control equipment over ALARM/CONTROL (J2) port.

  • Page 23: Preparation For Use

    385700-4006-006 INSTALLATION 2.5 PREPARATION FOR USE CAUTION Before applying power to the Distribution Line Amplifier, securely connect the RF ports to 50-ohm terminations. Failure to observe these cautions can damage the equipment. 2.5.1 Distribution Line Amplifier Setup  A Distribution Line Amplifier is part of a wayside antenna system; a RADIAX based signal distribution system.

  • Page 24: Distribution Line Amplifier Initial Operational Adjustments

    The expected input is 0 dBm. The input signal level threshold is set for 10 dB below the input level. If other levels are desired, the customer should contact Andrew with additional information when ordering the equipment. Refer to Figure 2-7 PA Module Outline, for PA adjustment points locations.

  • Page 25: Pa Input Alarm Adjustment

    385700-4006-006 INSTALLATION The spectrum analyzer, if used, should be configured as follows: Center Frequency 2416.64 MHz Span 2 MHz 30 KHz 3 Hz Ref. Level as required Attach a ≥ 10 dB, 2 watt or greater, power attenuator to the spectrum analyzer RF input. The direction control signal characteristics required will depend on the interface option installed.

  • Page 26: Pa Output Adjustment

    385700-4006-006 INSTALLATION Attach a voltmeter to J4-3 on the Alarm I/O board. (PA input alarm test point). TP1 or TP2 can be used as the ground connection. Refer to Figure 1-3 DLA Internal View for the location of the Alarm and Control Interface Board test points. Standard 0.080 test probes should be used for test points.

  • Page 27: Low Noise Amplifier (Lna) Channel (Channel 2)

    The expected signal input range is -40 to -90 dBm. If other settings are desired, the customer should contact Andrew with additional information when ordering the equipment. Refer to Figure 2-8 LNA Module Outline, for LNA adjustment points locations.

  • Page 28: Lna Output Adjustment

    385700-4006-006 INSTALLATION Center Frequency 2467 MHz Span 2 MHz 30 KHz 3 Hz Ref. Level as required Attach a 10 dB, 2 watt or greater, power attenuator to the spectrum analyzer RF input. The direction control signal characteristics required will depend on the interface option installed.

  • Page 29: Lna Output Alarm Adjustment

    385700-4006-006 INSTALLATION 2.5.2.3.3 LNA Output Alarm Adjustment NOTE The previous step must be completed before adjusting the output alarm. Attach a voltmeter to J4-2 (LNA output Alarm test point) on the Alarm I/O board. TP1 or TP2 can be used as the ground connection. Adjust R2 on the LNA until the voltage on J4-2 goes high (≥...

  • Page 30: Pa Input Signal Alarm

    J4-1 is > 1.0 VDC perform the steps outlined in section 2.5 for the PA output alarm adjustment. If after completing the amplifier setup procedure the input alarm is not < 0.7 VDC with the expected input to J4, the amplifier should be replaced. Contact Andrew for additional information.

  • Page 31: Forward Lna Channel Verification

    ± 1 dB and the amplifier setup procedure the output level of the LNA channel is not G all external test measurement cable losses are accounted for, the amplifier should be replaced. Contact Andrew for additional information. 2.5.3.2.2 LNA Output Signal Alarm This step assumes that the LNA output level has been set as explained in section 2.5.3.2.1...

  • Page 32: Pa Input Signal Alarm

    > 0.7 VDC, perform the steps outlined in section 2.5 for the LNA output alarm adjustment. If after completing the amplifier setup procedure the output alarm is not < 0.7 VDC with the previously set input level to J3, the amplifier should be replaced. Contact Andrew for additional information.

  • Page 33: Wiring Protection And Grounding

    385700-4006-006 OPERATIONS CHAPTER 3 OPERATIONS 3.1 WIRING PROTECTION AND GROUNDING The Distribution Line Amplifier does not have controls and indicators accessible from the outside of the unit. The DLA has two 10 Ampere fuses F1 and F2 for wiring protection on the connector panel.

  • Page 34: Startup And Shutdown Prodecures

    385700-4006-006 OPERATIONS 3.2 STARTUP AND SHUTDOWN PRODECURES The following procedures ensure that installation does not damage the equipment. 3.2.1 DLA Startup Refer to section 4.2.1, for procedures to properly install the DLA. Mount the DLA in the equipment room or in the tunnel with no connections made. To start the DLA perform the following: ®...

  • Page 35: Chapter 4

    The last column, Corrective Action, specifies the action necessary to correct the fault. After taking corrective action, perform the appropriate diagnostic procedure to verify that the correction was successful. For malfunctions that the fault isolation table does not list, contact Andrew’s technical support personnel. NOTE The following table only isolates faults to the LRU level.

  • Page 36: Corrective Maintenance

    385700-4006-006 MAINTENANCE AND TROUBLESHOOTING 4.2 CORRECTIVE MAINTENANCE This section describes the removal and replacement of the DLA. See Table 4-1 DLA Fault Isolation, to determine when to remove and replace a line replaceable unit (LRU). 4.2.1 Remove and Replace DLA Referring to Figure 4-1 Remove and Replace DLA, perform the following actions to remove the DLA (shown as Item 2) Disconnect VAC power cable from DLA (2) POWER IN (3) port.

  • Page 37: Figure 4-1 Remove And Replace Dla

    385700-4006-006 MAINTENANCE AND TROUBLESHOOTING Figure 4-1 Remove and Replace DLA Document use is restricted to that described on cover...

  • Page 38: Test Procedures

    If necessary, substitute an equivalent to the equipment listed. The following test procedures help the user verify that a DLA is faulty. Return faulty amplifiers to Andrew Corporation for maintenance and repair. Refer to paragraph 2.1.1 for equipment return information.

  • Page 39: Radiax Alarm Asserted

    Distribution Line Amplifier output port (J3 for the forward direction) the unit should be returned to Andrew Corporation. If a signal is present, the user should confirm that the amplifier output is below the levels indicated on the configuration sheet attached to the Distribution Line Amplifier.

  • Page 40: Loss Of Pilot Tone Signal

    The expected output at the pilot tone module J3 port is a nominal - 10 dBm signal at 2401 ± 2 MHz. If this signal is not present, the Distribution Line Amplifier should be returned to Andrew Corporation. If the signal is present, reattach the cable from J3 of the pilot tone module to the LNA module AUX RF input port.

  • Page 41: Chapter 5

    1-1 Distribution Line Amplifier (4 port) shows all of the items on the list. To procure any of the parts, contact Andrew Corporation or the appropriate vendor for the part. The parts list includes three columns: Description, Part Number, and Quantity (Qty). The Description column identifies the specific part, beginning with the assembly or line-replaceable unit (LRU) that contains it.

  • Page 42: Table 5-2 Parts List

    385700-4006-006 ORDERING INFORMATION Table 5-2 provides a list of replaceable parts and mating connectors for the amplifier assemblies. Description Part Number Distribution Line Amplifier 385700-4000 Mating Power Connector Assembly (J1) MS3475W14-4S Mating Alarm/Control Connector (J2) MS3126F20-16S or KPSE08F20-16S AC Fuses (F1, F2) Bussman MDA-10 Table 5-2 Parts List Document use is restricted to that described on cover...

  • Page 43: Chapter 6

    385700-4006-006 MECHANICAL INFORMATION CHAPTER 6 MECHANICAL INFORMATION Figure 6-1 DLA Mechanical Outline Document use is restricted to that described on cover...

  • Page 44: Chapter 7

    385700-4006-006 ALARM/CONTROL TEST CIRCUIT CHAPTER 7 ALARM/CONTROL TEST CIRCUIT The following schematic can be used to construct a test fixture to control the direction of the DLA and to monitor the status of the various Figure 7-1 Document use is restricted to that described on cover...
  • Page 45 385700-4006-006 ALARM/CONTROL TEST CIRCUIT Document use is restricted to that described on cover...
  • Page 46 385700-4006-006 ALARM/CONTROL TEST CIRCUIT Document use is restricted to that described on cover...
  • Page 47 385700-4006-006 ALARM/CONTROL TEST CIRCUIT Document use is restricted to that described on cover...
  • Page 48 385700-4006-006 ALARM/CONTROL TEST CIRCUIT alarms. The test fixture connects to J2 Alarm/Control of the DLA. This test fixture requires an external 24 VDC supply. The circuit should be mounted within a metal enclosure so that the required cable shielding integrity is maintained. Document use is restricted to that described on cover...

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