About The Rear Camera Guide - Alpine X901D Owner's Manual

About the Rear Camera Guide

To display the guide, set "Guide Display ON/OFF Setting" (page 80) to
On. Also, to adjust the guide, see "Adjusting the Rear/Front Camera
Guide" (page 45). You can also turn off the guide in the Rear camera
display screen.
Indication mark meaning
When the car is put into reverse gear, the monitor switches to the rear
view camera image. Guides appear to help visualise the car's width and
distance from the rear bumper.
Car width extension marks (red, yellow and green in
order of distance)
If properly calibrated, the marks indicate the car's width. This
helps guide the car's path when backing up in a straight line.
The marks represent the distance from the rear of the car (from
the rear end of the bumper).
• The marks do not move in synchronisation with the steering
wheel.
• Set the marks to suit the car's width.
Distance guidance marks
The marks represent the distance from the rear of the car (from
the rear end of the bumper).
• The marks do not move in synchronisation 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
C
B
A (about 0.5 m)
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-EN