Navigation System: Description and Operation: Overview

Navigation System

OVERVIEW
The navigation system provides audible and visual route guidance information to enable the driver to reach a desired destination. The system allows the driver to choose the desired route using minor or major roads and will present 3 routes to the driver based on user preferences. Directions to hospitals, museums, monuments and hotels are also available. The navigation computer uses map information stored on a DVD (digital versatile disc) to determine the best route for the journey and provide the driver with details of directions and approaching junctions.
The navigation system has various levels of user control through the Touch-screen and JaguarVoice system. System volume adjustment can be made using the ICP (integrated control panel), Touch-screen and steering wheel controls.
There are 3 navigation system variants specific to various markets. On all systems the GPS (global positioning system) signal is received by the GPS (global positioning system) antenna located in the roof pod antenna module.
The European navigation system includes the TMC (traffic messaging channel) function, which receives traffic information from an FM antenna integrated into the heated rear window. On a pre-selected route the system will offer re-routing options depending on traffic conditions.
The Japanese navigation system includes the VICS (vehicle information and communication systems) function. The VICS (vehicle information and communication systems) supplies information to enable the navigation computer to re-route the navigation guidance or to inform the vehicle driver of traffic conditions in the vehicles vicinity. Information is provided to the system through an FM antenna integrated into the heated rear window and a VICS beacon located in the LH upper side of the instrument panel.
The NAS (North American specification) variant does not include any additional traffic information systems.
The navigation system is primarily controlled from the Touch-screen which is located in the center of the instrument panel. Control signals from the Touch-screen are sent on the MOST (media oriented systems transport) ring to the navigation computer. The navigation computer uses a dedicated GVIF (gigabit video interface) bus to transmit video signals to the Touch-screen.
Depending upon the audio system version fitted the navigation audio output signals are sent on the MOST (media oriented systems transport) ring to the IAM (integrated audio module) or the power amplifier for speaker output.