ON-BOARD MONITOR AND NAVIGATION SYSTEM INTERFACE
The I-Bus is the main communication link.
The video module of the Mark I system is not used with the Mark II system in the US market
(reduced cost, simplified system, faster operation).
The Mark II nav computer communicates directly on the I-Bus (ARCNET not used). It
generates the RGB video signals and sends them to the On-Board Monitor LCD. It also
provides improved quality audio signals directly to the amplifier for navigation specific
audio instructions (right turn ahead).
The Mark II nav computer receives two wheel speed sensor signals from the DSC sys-
tem for monitoring vehicle speed and distance covered.
The Mark II nav computer incorporates an electronic gyro compass which takes the
place of the magnetic field sensor of the previous system.
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On-Board Monitor and Navigation Systems