Preliminary ADCP-75-191 Preliminary Issue B November 2005 ® Digivance LRCS 800 and 1900 MHz Systems Reverse Link Monitor User Guide 20916-A 1342358 Rev 1
ADCP-75-191 • Preliminary Issue B • November 2005 • Preface COPYRIGHT © 2005, ADC Telecommunications, Inc. All Rights Reserved Printed in the U.S.A. REVISION HISTORY ISSUE DATE B 11/2005 REASON FOR CHANGE Original release. LIST OF CHANGES The technical changes incorporated into this issue are listed below. PAGE IDENTIFIER – – DESCRIPTION OF CHANGE Original release TRADEMARK INFORMATION ADC and Digivance are registered trademarks of ADC Telecommunications, Inc.
ADCP-75-191 • Preliminary Issue B • November 2005 • Preface TABLE OF CONTENTS Content Page ABOUT THIS MANUAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v RELATED PUBLICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v ADMONISHMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ADCP-75-191 • Preliminary Issue B • November 2005 • Preface TABLE OF CONTENTS Content Page Blank Page iv © 2005, ADC Telecommunications, Inc.
ADCP-75-191 • Preliminary Issue B • November 2005 • Preface ABOUT THIS MANUAL This publication provides supplemental information about Digivance LRCS 800 and 1900 MHz Systems that are equipped with the Reverse Link Monitor (RLM) feature.
ADCP-75-191 • Issue A • June 2001 • Preface GENERAL SAFETY PRECAUTIONS Warning: Wet 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. STANDARDS CERTIFICATION FCC: The 800 MHz components of each LRCS system comply with the applicable sections of Title 47 CFR Part 22.
ADCP-75-191 • Preliminary Issue B • November 2005 1 DESCRIPTION The Reverse Link Monitor (RLM) is an optional add-on feature that is available for the Digivance 800 and 1900 MHz LRCS product line. The RLM feature provides an alarm indication if there is a loss of gain in the reverse path RF signal. The standard Digivance product provides an alarm indication if there is an internal component failure or an optical failure but does not provide an alarm if a loss of gain occurs in the reverse path RF signal.
ADCP-75-191 • Preliminary Issue B • November 2005 HOST UNIT 1 REMOTE UNIT 1 BASE TRANSCEIVER STATION RF CONTROLLER AREA NETWORK RF CONDITIONING PANEL RF HOST UNIT 2 REMOTE UNIT 2 NETWORK OPERATIONS CENTER RF CONTROLLER AREA NETWORK T1, DS0 WITH RS232 CONVERSION, OR OTHER MEDIUM HOST UNIT 3 REMOTE UNIT 3 RS-232 RS-232 ASCII ETHERNET LAN PC COMPUTER WITH EMS AND SNMP PROXY AGENT NETWORK SNMP MANAGER Figure 1.
ADCP-75-191 • Preliminary Issue B • November 2005 4 EMS SOFTWARE GRAPHICAL USER INTERFACE The RLM alarm message is recognized by the Version 7.0 EMS software and displayed as a Major alarm on the HOST Alarm screen as shown in Figure 2. When an RLM alarm message is received, the Reverse Link Fault indicator will change from green (normal) to red (alarm). Indicator for Reverse Link Monitor Figure 2.
ADCP-75-191 • Preliminary Issue B • November 2005 5 TROUBLESHOOTING AN RLM ALARM An RLM alarm indicates that the level of the reverse path RF signal has dropped by 10 dBm as referenced against a pilot tone injected at the STM and measured at the Host Unit. The reverse path gain is provided on a system level by both the Host Unit and the Remote Unit (STM). Together, the Host Unit and Remote Unit (STM) provide 30 dBm of gain in the reverse path.
ADCP-75-191 • Preliminary Issue B • November 2005 6 CUSTOMER INFORMATION AND ASSISTANCE PHONE: EUROPE Sales Administration: +32-2-712-65 00 Technical Assistance: +32-2-712-65 42 EUROPEAN TOLL FREE NUMBERS Germany: 0180 2232923 UK: 0800 960236 Spain: 900 983291 France: 0800 914032 Italy: 0800 782374 U.S.A.
