Myron&Davis NV8ACC1 - Manual (Page 67)

If the back up sensors are connected, but
the reverse camera is not, the figure on the
right will be displayed.
If both the back up camera
and sensors are connected, the
screen will display as figure on right.
Camera picture only displayed if
back up sensors are not connected.
Without camera
connected
Camera connected
When back up sensors are connected
without a camera, it will only show an
analog car image and detected distance
on the screen
When back up sensors are connected
to left and right sensors and the distance
between is less than 1.2 m, but more than
0.3m, the monitor will display left and
right sensor signpost and actual distance