Barco port3 and port 4/5 question

No, this is not the case for all models,




Port 3 offers some video improvement over 5, mostly in noise levels on the 808 series and the likes. However, the Barco Data and Graphics 800 series do have a port 3 interface, but it is used for CGA/EGA purposes only and not capable of displaying full color video. Think about that before running to the store to buy a port3 cable or make your own convertor. It wont work on an 800.

I have checked it and you are absolutely right port 3 can operate without port4/5 in working condition

Bjorn is right. The video input circuits are separate. Port 3 takes a different path through the projector than does 4/5.

Thanks for checking

I have a BG808s & a older BG1209 and play a lot both on Port 3 (DB9) and Port 5 RGB 5 BNC input for comparison from same source, two cable. Yes, Port 3 has better PQ but only 5% better not significant noticeable, which you usually won't notice in watching movie unless with still image or slow motion frame by frame shoot out. The Barco engineer who calibrate my projector told me it is due to Barco has improved on VGA electric circuit design on Port 3 (separate from Port 4/5).


BG808s is a later model its Port 5 does can accept both negative and positive syn Polarity while the older 1209 or 808 (non S model) port 5 only accept negative synch (no positive synch).