MARK I NAVIGATION COMPUTER INPUTS
The Mark I Navigation computer relies on the digitized map CD data to calculate the routes
to the selected destinations. The Nav. computer also relies on accurate input signals from
the vehicle to calculate the exact coordinates of the vehicle at all times.
Each two wire link is similar to the CAN line signal but unidirectional. When a data burst is
transmitted it is mirrored on the other wire as a self check of the data transmission.
The GPS receiver module is provided KL 30 to maintain vehicle position in memory. When
KL R is switched on the receiver module resumes monitoring the satellite radio signals
picked up from the GPS aerial. The link to the GPS antennal is a gold plated coaxial
connector.
GPS INPUT SIGNAL: The GPS receiver
module communicates with the
navigation computer over a four wire bi-
direction interface.
The Navigation computer requests the
exact coordinates of the vehicle over the
RXD-RXDN link. The GPS receiver
module responds with the data over the
TXD-TXDN link.
GPS
ANTENNA
27
On-Board Monitor and Navigation Systems
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