Alpine iLX-407 Owner's Manual page 53

Distance guidance lines
The marks represent the distance from the rear of the
car (from the rear end of the bumper).
• The marks do not move in synchronization with the
steering wheel.
• We recommend that you measure the actual distance
to the marks when parked on a level surface.
• Depending on the condition of the car or road surface, the
range of vision may vary.
• The camera has a limited range of vision. Objects at extreme
angles to the camera (e.g. under the bumper or at opposite
ends of the bumper) may not be in the its field-of-vision.
• The rear camera image may have a tint which is different
from the actual surroundings.
• Depending on the car, the guidance may deviate to the right
or left. This is not a malfunction.
■
Distance guidance mark
The distance guides represent the ground level distance
from the rear bumper. It is difficult to accurately estimate
the distance to objects above ground level.
In the following example, the distance to A is 0.5 m and the
distance to B is 1 m.
<Screen>
<Positions of A, B and C>
about 1 m
In the screen, according to the distance guidance marks,
the truck seems to be parked about 1 m away (at the
position B). In actual fact, however, if you reversed to
position A, you would collide with the truck.
In the screen, positions A, B and C seem to be located in
order of proximity. However, in actual fact, the position
A and C are the same distance, and B is farther away
than positions A and C.
• The car width extension mark represents the distance to the
road surface. The distance to an object on the road is not
accurately represented by the guides.
Error between the screen and the actual road
surface
In the following conditions, errors are produced between
the screen guidance and the actual road surface. (The
illustrations represent a case when the camera is installed in
the standard position.)
■
When there is a steep upward slope behind
the car (example)
<Screen>
Distance guidance marks
<Situation of the car>
C
B
A
(about
0.5 m)
The distance guidance mark represents the distance to a
flat road surface. Therefore in the case of an upward
slope behind the car, the distance guides are displayed
closer to the rear bumper than the actual distance. For
example, if there is an obstacle on the upward slope, it
may appear farther away than its actual position.
Also, an error may occur between the guidance and the
actual path of the car on the road surface.
Actual distances
Error Error
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