Alpine iLX-507E Owner's Manual page 54

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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.)
54
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ALPINE iLX-F509E 68-41657Z84-A (EN)
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When there is a steep upward slope behind
the car (example)
<Screen>
C
B
A
Distance guidance marks
(about
0.5 m)
<Situation of the car>
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