User's Manual

Galaxy Tracking Systems, L.L.C. Technical Documentation - VTU
1.0 INTRODUCTION
This document is intended to provide a description of the operation and interfaces of the
Vehicle Transceiver Unit (VTU.
2.0 SCOPE
This document describes
the operation and use of the Vehicle Transceiver Unit (VTU).
3.0 APPLICABLE DOCUMENTS
Vehicle Location and Tracking System (VLaTS)
Vehicle Tracking Unit (VTU) Installation Guide Revision 1
24 February 1999
Vehicle Location and Tracking System (VLaTS)
Mobile Tracking Unit (MTU) User’s Guide
7 Sept 1999
4.0 Specifications
VHF Receiver:
Frequency: Multiple frequency operation within band
Frequency Band: 150 - 174 MHz band typical
Modulation Format: GMSK
Deviation: +/-1.5 kHz
Transmission Rate: 9,600 Baud, 7-bit even parity, 1 stop bit (12.5 kHz BW)
Sensitivity: -114 dBm
VHF Transmitter:
Frequency: Multiple frequency operation within band
Frequency Band: 150 - 174 MHz band typical
Internal Stability: +/- 1.5 ppm
Modulation Format: GMSK
Deviation: +/- 1.5 kHz
Transmission Rate: 9,600 Baud, 7-bit even parity, 1 stop bit (12.5 kHz BW)
Transmit Power: 2.0 Watts (at 13.5 VDC)
Harmonic Suppression: >50 dBc
GPS Receiver:
Update rate: 1 Hz
Position Accuracy: 2m 2D RMS with Differential GPS (included)
100 m 2D RMS when Differential not available
Velocity Accuracy: 0.1 m/sec
Time Accuracy: 130 ns w/ SA on
Acquisition Time: Hot Start: < 3 seconds
Warm Start: < 20 seconds
Cold Start: < 2 minutes
Number of Channels: 12 (All-in-View)
Inputs / Outputs
Inputs: 4 Discrete Switch Inputs
Outputs: 4 Discrete Outputs, 15 mA
Use or disclosure of data contained on this sheet is subject to the restriction on the title page of this report.