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Airspan AS4000 Operator's Manual

Wireless local loop system
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AS4000
Wireless Local Loop System
Central Terminal
Level Control Unit
Operators Manual
605-0000-428
Airspan Communications Corporation
Issue 1.2 Date 5/11/98

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Summary of Contents for Airspan AS4000

  • Page 1 AS4000 Wireless Local Loop System Central Terminal Level Control Unit Operators Manual 605-0000-428 Airspan Communications Corporation Issue 1.2 Date 5/11/98...
  • Page 2 Central Terminal Level Control Unit Preface Operators Manual 605-0000-428 Issue 1.2 Date 5/11/98 This Page Intentionally Blank Page 2 of 8...
  • Page 3 6. This equipment is conditioned by the requirement that no modifications are made to the equipment unless the changes or modifications are expressly approved by the Airspan Communications Corporation 7. Prerequisite skills: Personnel installing, commissioning, and maintaining the Airspan products must have a basic knowledge of telephony and radio communications, and have experience in installing, commissioning and maintaining telecommunications products.
  • Page 4 Central Terminal Level Control Unit Preface Operators Manual 605-0000-428 Issue 1.2 Date 5/11/98 This Page Intentionally Blank Page 4 of 8...

  • Page 5: Electrostatic Discharge (Esd)

    Central Terminal Level Control Unit Preface Operators Manual 605-0000-428 Issue 1.2 Date 5/11/98 Safety Instructions - Warnings and Cautions SAFETY 1. Read and follow all warning notices and instructions marked on the product or included in this manual 2. Do not allow anything to rest on the power cord and do not locate the product where persons could step or walk on the power cord.
  • Page 6 Substances Hazardous to Health Regulations 1989’ , and the ‘ Dangerous Substances Regulations 1990’ ). At the end of any Airspan product’ s life cycle, the customer should consult with ACC to ensure that the product is disposed of in conformance with the relevant...
  • Page 7 Central Terminal Level Control Unit Preface Operators Manual 605-0000-428 Issue 1.2 Date 5/11/98 User Response Form Mail: Airspan Communications Limited Fax: (44) 895 4677182 Cambridge House Oxford Road Uxbridge Middlesex UB8 1UN Document Rating Excellent Good Average Below Average Poor...
  • Page 8 Central Terminal Level Control Unit Preface Operators Manual 605-0000-428 Issue 1.2 Date 5/11/98 This Page Intentionally Blank Page 8 of 8...

  • Page 9: Issue Control List

    Issue 1.2 Date 5/11/98 ISSUE CONTROL LIST Title Issue Date Issue Details Title Page November 1998 Issue ICL-001 November 1998 Issue IXL-001 November 1998 Issue GSI-001 November 1998 Issue DLP-001 November 1998 Issue Page 1 of 2 © Copyright Airspan Communications Corporation 1998...
  • Page 10 Central Terminal Level Control Unit ICL 001 Operators Manual 605-0000-428 Issue 1.2 Date 5/11/98 CHANGE TYPE/DATE PURPOSE PAGES AFFECTED Draft Issue #, Month Year Page 2 of 2...
  • Page 11 Safety Instructions Warnings and Cautions User Response Form ACCESS: ICL, IXL Issue Control List ICL-001 Index Task List IXL-001 GENERAL SYSTEM INFORMATION: GSI Introduction.GSI-001 1. Purpose of Document....................1 2. Prerequisite skills......................1 Page 1 of 4 © Copyright Airspan Communications Corporation 1998...
  • Page 12 Central Terminal Level Control Unit IXL 001 Operators Manual 605-0000-428 Issue 1.2 Date 5/11/98 Abbreviations Alternating Current Automatic Gain Control Customer Premises Equipment Customer Radio Unit Central Terminal Direct Current Digital Multi Meter Digital Radio System ISDN Integrated Services Digital Network ITU-T International Telecommunications Union -Telecommunications Loop Disconnect...

  • Page 13: Related Documentation

    Central Terminal Level Control Unit IXL 001 Operators Manual 605-0000-428 Issue 1.2 Date 5/11/98 Related Documentation Fixed Assignment 605-0000-430 System Overview 605-0000-431 System Operations and Maintenance Manual 605-0000-432 Central Terminal - Equipment Rack Installation & Commissioning 605-0000-433 Central Terminal - Antenna/Feeder Installation & Commissioning 605-0000-434 Hardware Overview 605-0000-435 Material Return and Repair 605-0000-436 Subscriber Terminal Installation &...
  • Page 14 Central Terminal Level Control Unit IXL 001 Operators Manual 605-0000-428 Issue 1.2 Date 5/11/98 This Page Intentionally Blank Page 4 of 4...

  • Page 15: Purpose Of Document

    This document describes the operation of the ACC (CT) Rack Level Control Unit Prerequisite skills This manual is intended for use by persons familiar with the Airspan product having attended the ACC CT training course prior to performing the procedures in this practice.
  • Page 16 Central Terminal Level Control Unit GSI 001 Operators Manual 605-0000-428 Issue 1.2 Date 5/11/98 This Page Intentionally Blank Page 2 of 2...

  • Page 17: Architecture Overview

    Mode setting for each Shelf Controller i.e. Continuous mode, hourly poll, daily poll, automatic level control suspended. Other channel configuration data such as frequency and PN code is automatically extracted from each shelf controller. Page 1 of 14 © Copyright Airspan Communications Corporation 1998...
  • Page 18 Modem Shelf 1 Modem Shelf 2 Modem Shelf 3 Modem Shelf 4 Communication lines to Level Control Unit each shelf controller Includes keypad and display for user I/O Figure 1. LCU Connections to AS4000 CT Rack Page 2 of 14...

  • Page 19: Principles Of Operation

    Central Terminal Level Control Unit GSI 002 Operators Manual 605-0000-428 Issue 1.2. Date 5/11/98 Principles of Operation The Level Control Unit periodically acquires a full low rate RF downlink / uplink through RF cabling coupled into the CT transmit / receive antenna ports.
  • Page 20 Central Terminal Level Control Unit GSI 002 Operators Manual 605-0000-428 Issue 1.2. Date 5/11/98 Level Control Unit 4.1. Mechanical The Level Control Unit is fitted at the base of the Central Terminal Rack and measures 600mm wide, 300mm deep. 100mm high. Terminal Shelf 4 Shelf 1...
  • Page 21 Central Terminal Level Control Unit GSI 002 Operators Manual 605-0000-428 Issue 1.2. Date 5/11/98 Select A Shelf 0 E - 1 - T Display <Shlf 1>_ Shlf 2 0 - - Shlf 3 Shlf 4 - - - Next Shelf Main Menu Previous Shelf Previous Menu...
  • Page 22 Central Terminal Level Control Unit GSI 002 Operators Manual 605-0000-428 Issue 1.2. Date 5/11/98 Note: The shelf selection menu can be reached from any point down the menu tree by keying F5. F6 returns the user to the previous menu. Data Entry / Menu Selection The up and down arrow keys are used to move between options and fields on the display.

  • Page 23: Menu Displays

    Central Terminal Level Control Unit GSI 002 Operators Manual 605-0000-428 Issue 1.2. Date 5/11/98 Menu Displays Note : # = Numerical value * = Alphabetical character 6.1. Status The status display is shown at all times and indicates the current selected shelf, transmit or receive polling, and state of communication with shelf controller.
  • Page 24 Central Terminal Level Control Unit GSI 002 Operators Manual 605-0000-428 Issue 1.2. Date 5/11/98 6.2. Shelf Selection Menu This menu is used to select the shelf, of which the LCU operation and configuration information needs to be displayed and set respectively. Once the shelf has been selected all the subsequent menus display the current shelf identifier.
  • Page 25 Central Terminal Level Control Unit GSI 002 Operators Manual 605-0000-428 Issue 1.2. Date 5/11/98 6.5. Link Information Menu This menu displays the following information: Current Shelf Id, RF channel number, Uplink status and transmit signal power, Downlink status and recovered signal power. Shelf RF Channel SH :4...
  • Page 26 Central Terminal Level Control Unit GSI 002 Operators Manual 605-0000-428 Issue 1.2. Date 5/11/98 6.7. Configuration Information Menu This menu displays: Current Shelf Id, PN code, RW Code RF channel number and Mode. This menu cannot be used to alter any of the displayed parameters. Config SH:2 RW code PN Code No...
  • Page 27 Central Terminal Level Control Unit GSI 002 Operators Manual 605-0000-428 Issue 1.2. Date 5/11/98 mode is used during commissioning or maintenance operations only, It is only possible to have one shelf at a time in continuous mode. Attempts to put a second shelf in continuous mode are rejected until an option other than continuous mode is chosen for the first shelf.
  • Page 28 Central Terminal Level Control Unit GSI 002 Operators Manual 605-0000-428 Issue 1.2. Date 5/11/98 This option is used if the LCU does not obtain the uplink during level control operation. 6.13. Version The Version Screen gives copyright and informs of the software version and compile date.

  • Page 29: Setting Up Rx Sensitivity Using The Level Control Unit

    4. If the LCU is being set-up for the first time Select Path Loss Set. Shelf: 1 & 2 Loss (dB):###.# 0-- Enter the sum of the component losses for the system. The losses for the cable are recorded on a cable attenuation record Page 1 of 4 © Copyright Airspan Communications Corporation 1998...
  • Page 30 Central Terminal Level Control Unit DLP 001 Operators Manual 605-0000-428 Issue 1.2 Date 5/11/98 attached to the top of the cable. Cable A is supporting modem shelves one and two. Cable B is supporting modem shelves three and four. 454-0010-019 Issue x CABLE ATTENUATION 1865 x.xx...
  • Page 31 Central Terminal Level Control Unit DLP 001 Operators Manual 605-0000-428 Issue 1.2 Date 5/11/98 Shelf RF Channel SH :1 RX signal Level RF: 8 UL: Y + 0.8dBm 0-- Uplink DL: Y -98.0dBm 0-- Downlink TX signal Level Y = Link Acquired N = No link Wait for both uplink and downlink signal acquisition.
  • Page 32 Central Terminal Level Control Unit DLP 001 Operators Manual 605-0000-428 Issue 1.2 Date 5/11/98 If any errors occur the LCU will stop the level control operation and set the operation mode to Idle automatically. When this occurs view the Error Menu for the source of this error.

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