The highline camera has a control module that allows for the steering wheel angle to produce bending lines on the screen to show where you are going.
The lowline is just a static image.
Both oem styles use an rgbs connector. This is the only video input on the RNS. If you want to use an aftermarket composite video camera you need a composite to RGBS converter box as well. All aftermarket composite cameras are lowline. PAL or NTSC doesn't matter, its the connector type that you need to be concerned with.
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