33
Optical bus
It connects the central display and operating unit
to the navigation computer.
As it is very important for the navigation system
to have trouble-free data interchange, this con-
nection has been implemented by an optical
fibre cable.
In optical data transfer digital information is con-
verted into a series of light pulses and launched
into the optical fibre cable.
The advantage of optical fibre technology com-
pared with metallic leads is that data flow is
immune to electromagnetic fields.
These fields occur in every lead through which a
current flows. Leads which run parallel or cross
each other can interfere with each other. This
includes electromagnetic radiation, e.g. mobile
radio, which can also affect data transfers.
As optical bus connectors are highly sensitive to
damage, they must be provided with protective
caps during installation work.
Protective cap
Optical waveguide connector
Light pulses in optical waveguide
Digital information
Analogue or digital information
S274_131, 132
S274_129
S274_130
Electrons in metallic leads
Electromagnetic box of a
lead bearing current
Errors in data
transfer
Electromagnetic box of a
lead bearing current
No errors in
data transfer
S274_134, 135
ProCarManuals.com
To Next Page
Loading...
