Proxima DP8400x User Manual page 17

You can also connect to your video device using a BNC cable. Connect the
BNC connectors of the BNC cable to the appropriate Computer 3 connec-
tors on the projector. Connect the other end to the video port on your video
device. Use the A/V cable's audio connectors as described on the previous
page (the yellow connectors on the A/V cable are not used).
When 4 BNCs are connected, the projector handles a composite synch on H.
When 3 BNCs are connected, the projector handles a composite synch on G.
connect BNC cables
R G B V
H
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