VTU-3 Users Guide Author: Revision#: Document ID: Document Name: Ed Gyte 0.
VTU-3 Users Guide Copyright Copyright 2004 by LoJack Corporation. All rights reserved. This document contains proprietary information protected by copyright. This document is intended for use by LoJack internal customers and should be disclosed within the customer’s organization on a “need to know” basis. This document shall not be reproduced by any means, stored on magnetic media, or made available directly or indirectly to any third party, without prior written consent of LoJack Corporation.
VTU-3 Users Guide FCC Information This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment.
VTU-3 Users Guide Document History Version Status 0.
VTU-3 Users Guide Table Of Contents Section 1 About this Document ...............................................................................................6 1.1 Purpose ...........................................................................................................................6 1.2 Organization ....................................................................................................................6 1.3 Typographical Conventions ..............................................
VTU-3 Users Guide Section 1 About this Document 1.1 Purpose This document is designed to explain the purpose, functionality and the operation of the latest innovations in the LoJack Stolen Vehicle Recovery System. 1.2 Organization This document is designed as a reference source. It is not intended to replace or redefine current procedures.
VTU-3 Users Guide 1.3 Typographical Conventions Several type faces and text formats are used throughout this guide. Please refer to the following formatting in the text to help you identify special information.
VTU-3 Users Guide Section 2 VTU-3 INTERFACE As you can see in Figure 1 the VTU3 (PTCIII) is similar to the display units on previous tracking units (PTCI and PTCII). Reply Code Direction Indicator Signal Strength Indicator System Menu Mode Button Scan/Enter Button Up Arrow Down Arrow Figure 1 VTU3 Display Unit On the left side of the unit is a screen that displays information about a Vehicle Locating Unit (VLU) installed in the target vehicle.
VTU-3 Users Guide A major difference between the VTU3 and previous display units is the display in the lower center of the screen. This display is the “MODE INDICATOR”. The MODE INDICATOR shows what mode the Up and Down buttons are in. In Figure 1 the menu indicates “VX” (there is a symbol of a speaker “X”next to the V). This menu selection indicates that the buttons are in the Master Volume control mode. In Figure 2, the MODE INDICATOR “B” indicates that the buttons are in the Brightness control mode.
VTU-3 Users Guide When the menu is in the “Brightness” (B) mode it can be manual or automatic; in automatic mode, the intensity of the display will be changed by the amount of ambient light falling on the display unit. The brighter the ambient light the higher the display intensity will go, the lower the ambient light the lower the intensity will go. This feature is provided to eliminate the need for an operator to adjust the display while traveling through different ambient light environments.
VTU-3 Users Guide Volume Indicator Up & Down Controls Figure 4 VTU3 Display Unit (Master Volume Control mode) When the VTU3 is in the “Master Volume” control mode, pressing on either the up or down arrow controls will activate the “Master Volume Indicator” as shown in Figure 4. Each time the “Up” button is pushed the indicator bar will increase in length until the volume maximum is reached.
VTU-3 Users Guide that the display and the receiver unit are communicating. After the word “Scanning” appears on the screen the different ICONs can start to be displayed indicating that the system is communicating and receiving signals from different sources. 2.1 Background: VTU-3 is an extensive redesign of the LoJack Police Tracking Computer (PTCII) used for stolen vehicle recovery.
VTU-3 Users Guide 2.5 Smart Audio: 'Smart Audio' has been included in VTU-3 and is incorporated in several ways. First, as previously explained, the volume control reports back as “V” is adjusted. Next, when a 'Stolen LoJack' is decoded, at any signal strength, a clean beep will be presented. This is because the electronics handles-all the decisions regarding squelch and noise and interpretation of the LoJack signal. Tower signals, and other interference, will be ignored.
VTU-3 Users Guide Glossary Acronyms: A Ack AES AJD Acknowledgement (Tower to Tower Communications – International term) Anti Jam Disable Base Ack BBU BOM Acknowledgement by TRTU Battery Back-up Unit Bill Of Material CP Command Post DSP Digital Signal Processor ETSI European Telecommunications Standards Institute FCC FSK Federal Communications Commission Frequency Shift Keying GPRS GPS GSM General Packet Radio Service Global Positioning System Global System for Mobile Communications IA ITU In
VTU-3 Users Guide Q QA Quality Assurance RAS RLU3 RMS ADC RT RTC RTU RTU Lite Registration and Activation System Ruggedized VLU3 ????? Remote Transmitter Remote Transmitting Computer (term obsolete See RTU) Remote Transmission Unit, collective term for a site Repeater with intelligence SAC SNDECODE SNMP Sector Activation Computer Secret Number Decoder application Simple Network Management Protocol TBC TBD TDM TR Switch TTU To Be Confirmed. To Be Defined.
VTU-3 Users Guide Definitions Activation Code .. The code associated with a LoJack Unit that is used for activating or deactivating the unit. Adaptive configuration A supported configuration in which the VLU-5N will synchronize to a TRTU, and operate its receiver with a duty cycle in order to reduce average current consumption. When an Adaptive unit is out of range of a TRTU or TRU, it will operate its receiver continuously, hence drawing more current than when synchronized.
VTU-3 Users Guide LoJack Timed Remote Transmitter Unit (LoJack TRTU)........Synchronous LoJack TRTUs that incorporate precise timing control, facilitating the use of time-windowed synchronization of VLUs. The TRTU system uses different timing than the LoJack system LoJack Unit (LJU)A LoJack vehicle mounted module, which can be activated by a compatible system and tracked by a tracking receiver. Also referred to as Vehicle Transceivers (VTs) or Vehicle Location Units (VLUs). Low Current configuration (LC)..
VTU-3 Users Guide Standard Message A message generally sent from the TRTU system to the VLUX unit. Standard messages conform to the original LoJack message format Timed Remote Transmitter Unit (TRTU).......... Refers to a system of synchronous RTUs which incorporate precise timing control, facilitating the use of time-windowed synchronization of VLU5Ns. The LoJack TRTU system and the TRTU systems use different timing. TRACKER Network Unit (TNU) A name for a TRACKER version of a VLU-5N.
