User's Manual

Table of Contents
1 INTRODUCTION .................................................................................................................................. 6
2 SCOPE .................................................................................................................................................6
3 APPLICABLE DOCUMENTS ..............................................................................................................6
4 SPECIFICATIONS ...............................................................................................................................6
5 SYSTEM OVERVIEW ..........................................................................................................................7
5.1 M
OBILE COMPONENTS........................................................................................................................ 7
5.2 F
IXED COMPONENTS .......................................................................................................................... 8
5.3 RF TRANSMISSION SCHEME ............................................................................................................... 8
5.4 SYSTEM TIMING..................................................................................................................................8
6 VTU COMPONENTS............................................................................................................................ 9
6.1 VTU S
YSTEM ENCLOSURE ................................................................................................................. 9
6.1.1 GPS Receiver.......................................................................................................................... 9
6.1.2 Radio .......................................................................................................................................9
6.1.3 System Controller.................................................................................................................... 9
6.2 A
NTENNAS AND CABLES ...................................................................................................................10
6.3 O
PTIONAL COMPONENTS .................................................................................................................. 10
6.3.1 Switch Box (Alarms and Indicators) ...................................................................................... 10
6.3.2 Relay Box (Vehicle Controls) ................................................................................................10
7 VTU CONNECTORS AND CONNECTIONS ..................................................................................... 11
7.1 I
NPUTS............................................................................................................................................. 13
7.2 OUTPUTS .........................................................................................................................................14
8 VTU OPERATIONS............................................................................................................................14
8.1 VTU S
TARTUP .................................................................................................................................14
8.2 VTU OPERATING MODES ................................................................................................................. 15
8.2.1 OUT OF SERVICE Operating Mode ..................................................................................... 15
8.2.2 IN SERVICE Operating Mode ...............................................................................................15