F8I-DVLRCSPCSDigivance Long-Range Coverage Solution Single Band

Draft ADCP-75-126 Issue B April 2002 1209955 Rev A (Digivance™ Long-Range Coverage Solution Single Band 1900 MHz System (Installation and Operation Manual 17024-A FCC ID: F8I-DVLRCSPCS - User Manual - Part 1 DRAFT ADCP-75-126 Issue B April 2002 1209955 Rev A (Digivance™ Long-Range Coverage Solution Single Band 1900 MHz System (Installation and Operation Manual ADCP-75-126 • Issue B • April 2002 • Preface Page ii COPYRIGHT © 2002, ADC Telecommunications, Inc. All Rights Reserved Printed in the U.S.A. REVISION HISTORY TRADEMARK INFORMATION ADC and PowerWorx are registered trademarks of ADC Telecommunications, Inc. Digivance is a trademark of ADC Telecommunications, Inc. Procomm Plus is a registered trademark of Quarterdeck Corporation. 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’s Tec h ni ca l Assistance Center at 1-800-366-3891, extension 73475 (in U.S.A. or Canada) or 952-917-3475 (outside U.S.A. and Canada), or by e-mail to [email protected] ISSUEDATEREASON FOR CHANGE B04/2002Original issue. 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) 917-1717 ADCP-75-126 • Issue B • April 2002 • Preface Page iii © 2002, ADC Telecommunications, Inc. TABLE OF CONTENTS ContentPage ABOUT THIS MANUAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii RELATED PUBLICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii ADMONISHMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . viii GENERAL SAFETY PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . viii STANDARDS CERTIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix LIST OF ACRONYMS AND ABBREVIATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix SECTION 1: OVERVIEW 1INTRODUCTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 2SINGLE BAND SYSTEM OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 2.1Basic Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 2.2Base Transceiver Station Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 2.3 Handset Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 2.4Local Service Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3 2.5Remote NOC Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 3SYSTEM FUNCTIONS AND FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 3.1Fiber Optic Transport . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 3.2Control and Monitoring Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6 3.3Fault Detection and Alarm Reporting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6 3.4Powering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7 3.5Equipment Mounting and Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7 SECTION 2: DESCRIPTION 1INTRODUCTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 2HOST UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2 2.1Primary Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 2.2Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 2.3Fault Detection and Alarm Reporting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 2.4RF Signal Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3 2.5RF Signal Level Adjustments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4 2.6Propagation Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .…

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ADCP-75-126 • Issue B • April 2002 • Section 2: Description Page 2-12 © 2002, ADC Telecommunications, Inc. 4 SPECTRUM TRANSPORT MODULE The Spectrum Transport Module (STM), shown in Figure 2-5, serves as the handset servicing device for the Digivance LRCS. The STM provides the following basic functions: • Provides an RF interface (antenna ports) to the remote antenna(s). • Provides an optical interface to the HU. •Converts the digitized forward path optical signal to a digitized RF signal. •Converts the digitized RF signal to a composite RF signal. • Digitizes the reverse path composite RF signal. •Converts the digitized reverse path RF signal to a digitized optical signal. • Provides an RS-232 interface for connecting a local EMS computer. • Transports alarm, control, and monitoring information via the optical link. • Provides AC power input and battery power input. • Provides external alarm input. Figure 2-5. Spectrum Transport Module 17528-A NOTE: UNIT SHOWN INCLUDES DIVERSITY OPTION FCC ID: F8I-DVLRCSPCS - User Manual - Part 2 ADCP-75-126 • Issue B • April 2002 • Section 2: Description Page 2-13 © 2002, ADC Telecommunications, Inc. 4.1Primary Components The STM consists of an electronic circuit board assembly, power supply, duplexer, and fan assembly that are mounted within a powder-coated sheet metal enclosure. The metal enclosure provides a mounting point for the electronic components and controls RF emissions. Except for the fan unit, the electronic components are not user replaceable. The STM is designed for use within the RU cabinet. Except for the LPA interface connector, all controls, connectors, indicators, and switches are mounted on the STM front panel for easy access. A carrying handle is provided on the front of the STM to facilitate installation and transport. 4.2Mounting The STM mounts on a shelf within the RU cabinet. A runner on the bottom of the STM meshes with a track on the mounting shelf. The runner and track guide the STM into the installed position. The electrical interface between the STM and LPA is supported by a D-sub female connector located on the rear side of the STM. A corresponding D-sub male connector mounted at the rear of the RU cabinet mounting shelf mates with the STM connector. Captive screws are provided for securing the STM to the mounting shelf. 4.3Fault Detection and Alarm Reporting The STM detects and reports various faults including remote unit fault, optical fault, power fault, temperature fault, power amplifier fault, and external (door open) fault. Various front panel Light Emitting Diode (LED) indicators turn from green to red or yellow if a fault is detected. The status of the STM, the alarm state (major or minor), and other alarm information is summarized and reported over the optical fiber to the HU and also over the service interface. In addition, the alarm state of the HU is received over the optical fiber and reported to the service interface. This information may be accessed remotely through the NOC/NEM interface or locally through the EMS software GUI. 4.4Antenna Cable Connection The antenna cable connections between the STM and the antenna are supported through either one (non-diversity unit) or two (diversity unit) N-type female connectors. On non-diversity units, a single connector is used for the antenna cable which carries both the forward and primary reverse path RF signals. On diversity units, a second connector is used for the diversity antenna cable which carries only the diversity reverse path RF signals. The STM does not connect directly to the antenna but instead connects to a lightning protector that is mounted on the bottom of the RU cabinet (see Section 3.5). A coaxial jumper cable is provided (included with the enclosure) for connecting the STM connector to the lightning protector. 4.5RF Signal Level Adjustment The STM is equipped with a digital attenuator for adjusting the signal level of the forward path RF output signal. The remote forward path attenuator adjusts the level of the output RF signal at the RU antenna port and will add from 0 to 30 dB of attenuation to the output signal level. ADCP-75-126 • Issue B • April 2002 • Section 2: Description Page 2-14 © 2002, ADC Telecommunications, Inc. The attenuator can be set in 1 dB increments. The attenuator is software controlled and is adjusted through the NOC/NEM interface or the EMS software GUI. 4.6Optical Connection Fiber optic connections between the STM and the HU are supported through either two (non- diversity unit) or three (diversity unit) SC-type optical connector ports. On non-diversity units, one port is used for connecting the forward path optical signal and the other port is used for connecting the primary reverse path optical signal. On diversity units, a third optical port is used for connecting the diversity reverse path optical signal. 4.7Service Interface Connection The service interface connection between the STM and a local laptop computer loaded with the EMS software is supported by a single DB-9 female connector. The service interface connector provides an RS-232 DTE interface. The STM service interface connector supports local communications with both the STM and the corresponding HU. 4.8Powering The STM is powered by 120 or 240 Va c (50 or 60 Hz) power which is supplied through a three- conductor AC power cord. The power cord is provided with the RU cabinet. One end of the cord is hard-wired to the AC power outlet box and the other end is terminated with a molded-on plug cap. The power cord connects to a 3-wire AC cord connector mounted on the STM front panel. A switch on the STM front panel provides AC power On/Off control. The STM (and the connected LPA) may be powered by a 24 Vdc back-up battery system which is available as an accessory kit. A connector is provided on the STM front panel for connecting the wiring harness for the back-up battery system. 4.9Cooling Continuous air-flow for cooling is provided by a single fan mounted on the…

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ADCP-75-126 • Issue B • April 2002 • Section 3: Host Unit Installation Page 3-6 © 2002, ADC Telecommunications, Inc. Figure 3-4. WDM Mounting Shelf and WDM Module Installation 4HU MOUNTING PROCEDURE The HU may be mounted in either a 19-inch or 23-inch EIA or WECO equipment rack. Both US standard and metric machine screws are included for rack mounting the HU. When loading the HU in a rack, make sure the mechanical loading of the rack is even to avoid a hazardous condition such as a severely unbalanced rack. The rack should safety support the combined weight of all the equipment it holds. In addition, maximum recommended ambient temperature for the HU is 50º C (122º F). Allow sufficient air circulation or space between units when the HU is installed in a multi-rack assembly because the operating ambient temperature of the rack environment might be greater than room ambient. Use the following procedure to install the HU in the equipment rack: 1. The HU is shipped with the mounting brackets installed for 19-inch rack installations. If mounting the HU in a 19-inch rack, proceed to step 4. If mounting the HU in a 23-inch rack, proceed to step 2. 2. Remove both mounting brackets from the HU (requires TORX screwdriver with T20 bit) and save screws for reuse. Warning: We t conditions increase the potential for receiving an electrical shock when installing or using electrically powered equipment. To prevent electrical shock, never install or use electrical equipment in a wet location or during a lightning storm. Note: To insure that all optical connectors remain dust-free during installation, leave all dust caps and dust protectors in place until directed to remove them for connection. 16888-A WDM MODULE WDM MOUNTING SHELF FCC ID: F8I-DVLRCSPCS - User Manual - Part 3 ADCP-75-126 • Issue B • April 2002 • Section 3: Host Unit Installation Page 3-7 © 2002, ADC Telecommunications, Inc. 3. Reinstall both mounting brackets so the long side of the bracket is flush with the HU front panel as shown in Figure 3-5. Use the screws removed in step 2 to re-attach the brackets to the HU chassis. Figure 3-5. Installing the Mounting Brackets for 23-Inch Rack Installations 4. Position the HU in the designated mounting space in the rack (per system design plan) and then secure the mounting brackets to the rack using the four machine screws provided (use #12-24 or M6 x 10 screws, whichever is appropriate) as shown in Figure 3-6. Figure 3-6. HU Rack Mount Installation Note: Provide a minimum of 3 inches (76 mm) of clearance space on both the left and right sides of the HU for air intake and exhaust. 16882-A REMOVE AND REINSTALL MOUNTING BRACKETS AS SHOWN FOR INSTALLATION IN 23-INCH RACKS 16883-A ADCP-75-126 • Issue B • April 2002 • Section 3: Host Unit Installation Page 3-8 © 2002, ADC Telecommunications, Inc. 5CHASSIS GROUND CONNECTION A stud is provided on the rear side of the chassis for connecting a grounding wire to the chassis. Use the following procedure to connect the grounding wire to the chassis and to route the grounding wire to an approved earth ground source. 1. Obtain a length of #18 AW G (1.00 mm) insulated stranded copper wire for use as a chassis grounding wire. 2. Terminate one end of the wire with a ring terminal. 3. Locate the chassis ground stud at the rear of the HU as shown in Figure 3-7. Figure 3-7. Chassis Ground Stud 4. Attach the ring end of the wire to the chassis ground stud (see Figure 3-7). 5. Route the free end of the chassis grounding wire to an approved (per local code or practice) earth ground source. 6. Cut the chassis grounding wire to length and connect it to the approved ground source as required by local code or practice. 6 COAXIAL CABLE CONNECTIONS The RF interface between the HU and the BTS is supported through either two (non-diversity) or three (diversity) type N female connectors mounted on the HU front panel. On non-diversity units, one connector provides the coaxial cable connection for the forward path (downlink) signal and the other connector provides the coaxial cable connection for the reverse path (uplink) signal. On diversity units, a third connector provides the coaxial cable connection for the diversity reverse path (uplink) signal. Note: Be sure to maintain reliable grounding. Pay particular attention to ground source connections. 16169-A ADCP-75-126 • Issue B • April 2002 • Section 3: Host Unit Installation Page 3-9 © 2002, ADC Telecommunications, Inc. In many installations, it is usually necessary to install an external attenuator in the forward path link between the HU and the BTS. The procedure for determining the value of the external attenuator is provided in SECTION 4: OPERATION. The HU should be mounted as close as possible to the BTS to minimize cable losses. Use the following procedure to route the forward and reverse path coaxial cables and connect them to the HU: 1. Obtain the required lengths of high performance, flexible, low loss 50-ohm coaxial communications cable (RG-400 or equivalent) for all coaxial connections. 2. Route the forward and reverse path coaxial cables and the diversity reverse path cable (if the HU supports diversity) between the HU and the BTS interface (per system design plan) and cut to the required length. Allow sufficient slack for dressing and organizing cables at the HU and for installing an external attenuator in the forward path link. 3. Terminate each cable with a type N male connector following the connector supplier’s recommendations. 4. Connect the forward path cable to the FORWARD RF IN connector on the HU front panel as shown in Figure 3-8. Figure 3-8. Forward and Reverse Path Coaxial Cable Connections 5. Connect the reverse path cable to the REVERSE RF OUT connector on the HU front panel (see Figure 3-8). 6. If the HU supports diversity, connect the diversity reverse path cable to the REVERSE 2 RF OUT connector on the HU front panel (see Figure 3-8). 7. Dress and secure cables at the HU. 8. Complete all remaining c…

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ADCP-75-126 • Issue B • April 2002 • Section 4: Operation Page 4-3 © 2002, ADC Telecommunications, Inc. 2.1Turn-Up Procedure Use the following procedure to turn-up the system: 1. Temporarily disconnect the external alarm system or notify the alarm system provider that testing is in progress. 2. If turning-up multiple HU and RU systems that have not been configured for operation before, temporarily disconnect the CAN cables from the NET IN and NET OUT ports of each HU. 3. Determine if the forward path composite input signal level at the Host Unit FORWARD RF IN port is between –10 and –40 dBm and adjust level by installing an external attenuator if required. Refer to Section 2.3 for the calculation and adjustment procedure. 4. Connect the EMS computer (if not already connected) to the SERVICE connector on the HU or STM front panel. If necessary, a separate laptop computer loaded with the EMS software can be temporarily connected and used to initially configure the system. 5. Place the ON/OFF switch on the HU in the ON position (press I). 6. Place the ON/OFF switch on the STM in the ON position (press I). 7. Wait 6 to 8 seconds for the HU and the RU modules to initialize and then observe the LED indicators on the HU, STM and LPA. Refer to Section 5 for the troubleshooting procedures if the indicators do not respond as specified. 8. Start up the Digivance EMS software program. The EMS main window will open as shown in Figure 4-1. Note: The EMS software should be installed on a PC-type computer and the PC’s COM port should be configured to interface with the HU. For information about installing the EMS software and configuring the PC’s COM port, refer to the Digivance Element Management System Software User Manual (ADCP-75-125). Note: By default, all HU’s and RU’s are programmed with the same site number and name. This can cause problems for the Digivance EMS if multiple HU’s with the same site number and site name are networked together through the CAN interface. It is therefore advisable to temporarily disconnect the CAN interface cables from the HU until a unique site number and name can be entered for each HU and its corresponding RU. HOST UNITSPECTRUM TRANSPORT MODULELINEAR POWER AMPLIFIER POWER – Green AC POWER – GreenFAIL – Off STANDBY – OffSTANDBY – Off SHUTDOWN – Red HOST UNIT – GreenHOST UNIT – Green Digital Display – FORCED SHUTDOWN REMOTE UNIT – Green STM – Green DRIVE – Green, Ye l l o w, or RedPA – Green PORT 1/PORT 2 – GreenVSWR – Green PORT 3 – Green (diversity unit only) PORT 1/PORT 2 – Green PORT 3 – Green (diversity unit only) FCC ID: F8I-DVLRCSPCS - User Manual - Part 4 ADCP-75-126 • Issue B • April 2002 • Section 4: Operation Page 4-4 © 2002, ADC Telecommunications, Inc. Figure 4-1. Digivance Element Management System Main Window 9. Open the View drop down menu and connect to the Host and Remote pair by selecting “NotNamed/NotNamed”. The HOST Alarms display and the REMOTE Alarms display will open within the main window as shown in Figure 4-2. 10. Download the system software to both the Host and the Remote unit. Refer to Section 2.2 for details. Figure 4-2. Selecting Display Tabs Click to view drop down menu Clicking on the tabs in this list will open the cor- responding display. Host/Remote pair site name ADCP-75-126 • Issue B • April 2002 • Section 4: Operation Page 4-5 © 2002, ADC Telecommunications, Inc. 11. Click on the HOST Config tab and on the REMOTE Config tab (see Figure 4-2). The HOST Config display and the REMOTE Config display will open within the main window. 12. Enter the Site Name and Site Number for both the HOST and the REMOTE unit. Refer to Section 2.4 for details. 13. Reconnect the CAN cables to the HU’s NET IN and NET OUT ports. 14. Verify that no Major (except Major Extern Alarm) or Minor alarms are being reported in either the HOST or REMOTE Alarm displays and that all alarm fields (except Major Extern Alarm) are green. 15. Click on the HOST RF tab (see Figure 4-2). The HOST RF display will open within the main window. 16. Enter the Host Fwd Att (Forward Attenuation) values. This sets the forward input RF signal level at the HU. Refer to Section 2.5 for details. By default, this value is set to 0 dB. If the DRIVE LED on the HU front panel was red, it should turn green when this step is completed. 17. Determine if the RF output power at the STM ANTENNA is at the correct level per channel up to a composite maximum of 43.5 dBm. Refer to Section 2.6 for details. 18. Click on the REMOTE LPA tab (see Figure 4-2). The REMOTE PA display will open within the main window. 19. Enter the Remote Fwd Att value. This adjusts the RF output signal level at the STM ANTENNA port. Refer to Section 2.7 for details. By default this value is set to 0 dB. 20. Place the RF ON/OFF switch (on LPA front panel) in the ON position. 21. Verify that the SHUTDOWN LED indicator (on LPA front panel) turns from red to off and the Digital Display message changes from FORCED SHUTDOWN to NORMAL OPERATION. 22. Click on the HOST RF tab (see Figure 4-2). The HOST RF display will open within the main window. 23. Enter the Host Rev Att (Reverse Attenuation), and Host Div Rev Att (Diversity Reverse Attenuation) values. This sets the reverse output RF signal levels at the HU. Refer to Section 2.8 for details. 24. If a delay adjustment is required per the system design plan, enter the Host Fwd Delay, Host Rev Delay, and Host Div Rev Delay values. By default, the delay values are set to 0. Refer to Section 2.9 for details. 25. If a separate laptop computer loaded with the EMS software was used to initially configure the system, disconnect the laptop computer from the SERVICE connector on the HU front panel. Note: Each HU and RU pair will generally remain permanently connected to a PC-type desktop computer loaded with the EMS software. When two or more systems are connected together through the CAN interface, only one EMS computer is required to manage the networked HU and RU systems. The EMS comp…

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ADCP-75-126 • Issue B • April 2002 • Section 4: Operation Page 4-16 © 2002, ADC Telecommunications, Inc. Figure 4-12. HOST RF Display 5. Right-click on the Host Rev Att section of the display (see Figure 4-12). The Host Rev Att pop-up screen will open as shown in Figure 4-13. Figure 4-13. Host Rev Att Pop-Up Screen 6. Enter the attenuation value that will provide the required gain. Refer to Ta b l e 4 - 2 for the attenuation values and the corresponding gain values. 7. Click OK to close the pop-up screen and to make the changes take effect. 8. Repeat the process for the diversity reverse path by right-clicking on the Host Div Rev Att section (see Figure 4-12) and then entering the required attenuation value in the Host Div Rev Att pop-up screen. 9. Click OK to close the pop-up screen and to make the changes take effect. Right-click here to open the Host Rev Att pop-up screen Right-click here to open the Host Div Rev Att pop-up screen FCC ID: F8I-DVLRCSPCS - User Manual - Part 5 ADCP-75-126 • Issue B • April 2002 • Section 4: Operation Page 4-17 © 2002, ADC Telecommunications, Inc. 2.9Enter Host Forward and Reverse Delay The forward and reverse delay function allows entry of from 0 to 63 μsec of delay in the forward and reverse paths. This feature is used when multiple systems are used to transport the same channel and there is a significant difference in the path delay between systems. Additional delay may be entered to balance the overall system delay. The amount of delay required must be calculated by the RF engineer and should be included in the system design plan. The default setting is 0 μsec. Use the following procedure to change the forward and reverse path delay: 1. Click on the HOST RF tab. The HOST RF display will open within the EMS main window as shown in Figure 4-14. Figure 4-14. HOST RF Display Table 4-2. Reverse Path Setting ATTENUATION SETTING GAIN PROVIDED ATTENUATION SETTING GAIN PROVIDED ATTENUATION SETTING GAIN PROVIDED 0 dB →30 dB 11 dB →19 dB22 dB →8 dB 1 dB29 dB12 dB18 dB23 dB7 dB 2 dB28 dB13 dB17 dB24 dB6 dB 3 dB27 dB14 dB16 dB25 dB5 dB 4 dB26 dB15 dB15 dB26 dB4 dB 5 dB25 dB16 dB14 dB27 dB3 dB 6 dB24 dB17 dB13 dB28 dB2 dB 7 dB23 dB18 dB12 dB29 dB1 dB 8 dB22 dB19 dB11 dB30 dB0 dB 9 dB21 dB20 dB10 dB---- 10 dB20 dB219 dB---- Right-click here to open the Host Fwd Delay pop-up screen Right-click here to open the Host Rev Delay pop-up screen Right-click here to open the Host Div Rev Delay pop-up screen ADCP-75-126 • Issue B • April 2002 • Section 4: Operation Page 4-18 © 2002, ADC Telecommunications, Inc. 2. Right-click on the Host Fwd Delay section of the display (see Figure 4-14). The Host Fwd Delay pop-up screen will open as shown in Figure 4-15. 3. Obtain the value of the forward delay as specified in the system design plan. 4. Enter the forward path delay value and click OK to close the pop-up screen and to make the changes take effect. 5. Repeat the process for reverse delay and diversity reverse delay by right-clicking on the appropriate delay section (see Figure 4-14) and then entering the required delay value in the pop-up screen. 6. Click OK to close each pop-up screen and to make the changes take effect. Figure 4-15. Host Fwd Delay Pop-Up Screen ADCP-75-126 • Issue B • April 2002 • Section 5: Maintenance Page 5-1 © 2002, ADC Telecommunications, Inc. SECTION 5: MAINTENANCE 1SYSTEM MAINTENANCE OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 1.1Tools and Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1 2FAULT DETECTION AND ALARM REPORTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2 3FAULT ISOLATION AND TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6 4TEST PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-11 4.1Optical Power Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-11 4.2Optical Loopback Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12 5MAINTENANCE PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-13 5.1Scheduled Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-14 5.2Remote Unit Cabinet Filter Cleaning Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-14 5.3Host Unit Fan Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-15 5.4Spectrum Transport Module Fan Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-17 5.5Linear Power Amplifier Fan Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-19 _________________________________________________________________________________________________________ 1 SYSTEM MAINTENANCE OVERVIEW This section explains the Digivance LRCS fault detection and alarm reporting system, provides a method for isolating and troubleshooting faults, and provides test and maintenance procedures. The Digivance LRCS requires minimal regular maintenance to insure continuous and satisfactory operation. Components that require regular replacement, cleaning, or testing include the HU and RU fans and the RU air-filter and back-up battery, Maintenance also includes diagnosing and correcting service problems as they occur. When an alarm is reported, it will be necessary to follow a systematic troubleshooting …

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