User's Manual

Table of Contents
1 INTRODUCTION ..................................................................................................................................1
2 SCOPE .................................................................................................................................................1
3 APPLICABLE DOCUMENTS...............................................................................................................1
4 SPECIFICATIONS................................................................................................................................1
5 SYSTEM OVERVIEW...........................................................................................................................3
5.1 M
OBILE COMPONENTS ........................................................................................................................3
5.2 F
IXED COMPONENTS ...........................................................................................................................3
5.3 RF T
RANSMISSION SCHEME ................................................................................................................4
5.4 S
YSTEM TIMING ..................................................................................................................................4
6 VTU COMPONENTS............................................................................................................................5
6.1 VTU S
YSTEM ENCLOSURE ..................................................................................................................5
6.1.1 GPS Receiver ..........................................................................................................................5
6.1.2 Radio........................................................................................................................................5
6.1.3 System Controller ....................................................................................................................6
6.2 A
NTENNAS AND CABLES ......................................................................................................................6
6.3 O
PTIONAL COMPONENTS.....................................................................................................................6
6.3.1 Switch Box (Alarms and Indicators).........................................................................................6
6.3.2 Relay Box (Vehicle Controls)...................................................................................................6
7 VTU CONNECTORS AND CONNECTIONS........................................................................................7
7.1 I
NPUTS...............................................................................................................................................9
7.2 O
UTPUTS .........................................................................................................................................10
7.3 P
OWER ............................................................................................................................................10
7.4 A
NTENNAS........................................................................................................................................10
8 VTU OPERATIONS............................................................................................................................11
8.1 VTU S
TARTUP..................................................................................................................................11
8.2 VTU O
PERATING MODES ..................................................................................................................11
8.2.1 OUT OF SERVICE Operating Mode......................................................................................11
8.2.2 IN SERVICE Operating Mode................................................................................................12