AS4000 Wireless Local Loop System Central Terminal Level Control Unit Operators Manual 605-0000-428 Issue 1.
Central Terminal Level Control Unit Operators Manual 605-0000-428 Issue 1.
Central Terminal Level Control Unit Operators Manual Preface 605-0000-428 Issue 1.2 Date 5/11/98 Notice 1. This manual is subject to revision. 2. All rights reserved. 3. Right of modification reserved. 4. This manual is supplied without liability for errors or omissions. 5. No part of this manual may be reproduced or used except as authorised by contract or other written permission. 6.
Central Terminal Level Control Unit Operators Manual 605-0000-428 Issue 1.
Central Terminal Level Control Unit Operators Manual Preface 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. 3.
Central Terminal Level Control Unit Operators Manual Preface 605-0000-428 Issue 1.2 Date 5/11/98 NOTE Airspan products do not contain hazardous substances (as defined in UK ‘Control of Substances Hazardous to Health Regulations 1989’, and the ‘Dangerous Substances Regulations 1990’).
Central Terminal Level Control Unit Operators Manual Preface 605-0000-428 Issue 1.
Central Terminal Level Control Unit Operators Manual 605-0000-428 Issue 1.
Central Terminal Level Control Unit Operators Manual ICL 001 605-0000-428 Issue 1.2 Date 5/11/98 ISSUE CONTROL LIST Title Title Page ICL-001 IXL-001 GSI-001 DLP-001 Page 1 of 2 Issue 1.2 1.2 1.2 1.2 1.
Central Terminal Level Control Unit Operators Manual 605-0000-428 Issue 1.
Central Terminal Level Control Unit Operators Manual IXL 001 605-0000-428 Issue 1.2 Date 5/11/98 INDEX TASK LIST PREFACE: 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............................................................
Central Terminal Level Control Unit Operators Manual IXL 001 605-0000-428 Issue 1.
Central Terminal Level Control Unit Operators Manual IXL 001 605-0000-428 Issue 1.
Central Terminal Level Control Unit Operators Manual 605-0000-428 Issue 1.
Central Terminal Level Control Unit Operators Manual GSI 001 605-0000-428 Issue 1.2 Date 5/11/98 INTRODUCTION 1. Purpose of Document This document describes the operation of the ACC (CT) Rack Level Control Unit 2. 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.
Central Terminal Level Control Unit Operators Manual 605-0000-428 Issue 1.
Central Terminal Level Control Unit Operators Manual GSI 002 605-0000-428 Issue 1.2 Date 5/11/98 LEVEL CONTROL UNIT 1. Introduction The Level Control Unit (LCU) is used during system commissioning and routine maintenance. The Unit can be used to commission the Central Terminal, and set to poll each modem shelf hourly or daily to ensure the receiver setting is at its optimum. One Level Control Unit may be shared by up to four modem shelves in a single rack. 2.
Central Terminal Level Control Unit Operators Manual 605-0000-428 Issue 1.2. Date 5/11/98 Antenna Port 1 Antenna Port 2 Coupler Coupler To Element Manager ‘B’ Shelf 1 & 2 Tx 1, 2, 3, 4 Rx Shelf 3 & 4 Tx Sitespan PC RF Combiner Shelf Digi Board X25 PAD or Modem Shelf 1 Modem Shelf 2 Modem Shelf 3 Modem Shelf 4 Level Control Unit Communication lines to each shelf controller Includes keypad and display for user I/O Figure 1.
Central Terminal Level Control Unit Operators Manual GSI 002 605-0000-428 Issue 1.2. Date 5/11/98 3. 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. Knowledge of the path loss between the Level Control Unit and RF antenna port allows the LCU to instruct the Shelf Controller to adjust RF receive level as required.
Central Terminal Level Control Unit Operators Manual GSI 002 605-0000-428 Issue 1.2. Date 5/11/98 4. 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 FRU Fail 7 OK Shelf 4 3 2 1 Shelf 1 1 Shelf 3 1 Shelf 2 1 Front DC In A 1 B TX Dip/ Filter LNA Left Side Right Side 4.2.
Central Terminal Level Control Unit Operators Manual GSI 002 605-0000-428 Issue 1.2. Date 5/11/98 Select A Shelf 0E1- T 0- - - - _ Shlf 2 Shlf 3 Shlf 4 Display Next Shelf Previous Shelf Main Menu F1 Select Keys F2 F3 F4 F5 7 8 9 4 5 6 1 2 3 - 0 . F6 Previous Menu DEL Enter Key The menus are classified into three distinct types: Selection, Status and Configuration Menus. They are used to select options, display information i.e. read only, and enter information i.e.
Central Terminal Level Control Unit Operators Manual GSI 002 605-0000-428 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. 5. Data Entry / Menu Selection The up and down arrow keys are used to move between options and fields on the display. The carriage return key will then be used to confirm the option.
Central Terminal Level Control Unit Operators Manual GSI 002 605-0000-428 Issue 1.2. Date 5/11/98 6. 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.
Central Terminal Level Control Unit Operators Manual GSI 002 605-0000-428 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. Select a Shelf 0-1-T >Shlf 1< Shlf 2 0-Shlf 3 Shlf 4 0-- 6.3. Status/Configuration/Version Selection Menu SH: 3 Configure >Status< Ver 6.4.
Central Terminal Level Control Unit Operators Manual GSI 002 605-0000-428 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 Uplink Downlink SH :4 RF: 8 UL: Y DL: Y 0-0-+ 0.8dBm 0--98.0dBm 0-- RX signal Level TX signal Level Y = Link Acquired N = No link 6.6.
Central Terminal Level Control Unit Operators Manual GSI 002 605-0000-428 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. PN Code No RF Channel Shelf Operating Mode Config SH:2 PN: # RW:## RF: ## PL:##.# Mode: **** 0-0------ RW code Path Loss (dB) 6.8. Error Information Menu This menu will display the error status for the given shelf..
Central Terminal Level Control Unit Operators Manual GSI 002 605-0000-428 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. This menu will also display the current shelf identifier.
Central Terminal Level Control Unit Operators Manual GSI 002 605-0000-428 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. This will be displayed automatically when the hand held terminal is plugged in and can be reviewed form the Status/Configuration Selection Menu. LCU (C)ACL 1998 Oct 28 1998 Ver 6 7.
Central Terminal Level Control Unit Operators Manual DLP 001 605-0000-428 Issue 1.2 Date 5/11/98 SETTING UP RX SENSITIVITY USING THE LEVEL CONTROL UNIT 1. Setting up RX sensitivity using the Level Control Unit 1. Use Sitespan/ Element Manger to enter the set point for the required receive levels. If no set point is set the unit will default to -98dBm. 2. From the shelf selection menu, using the keypad select a Shelf. Use arrow keys to scroll between options and enter key to select.
Central Terminal Level Control Unit Operators Manual DLP 001 605-0000-428 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. A 454-0010-019 Issue x CABLE ATTENUATION MHz dB 1865 - x.xx 1880 - x.xx 1895 - x.xx 2049 - x.xx 2067 - x.xx 2088 - x.xx 2330 - x.xx 2346 - x.xx 2362 - x.xx 3431 - x.xx 3452 - x.xx 3477 - x.
Central Terminal Level Control Unit Operators Manual DLP 001 605-0000-428 Issue 1.2 Date 5/11/98 Shelf RF Channel Uplink Downlink SH :1 RF: 8 UL: Y DL: Y 0-0-+ 0.8dBm 0--98.0dBm 0-- RX signal Level TX signal Level Y = Link Acquired N = No link Wait for both uplink and downlink signal acquisition.
Central Terminal Level Control Unit Operators Manual DLP 001 605-0000-428 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.
