> If it is going to have BNC connectors, they it probably should have 50 > ohm termination resistors. > > But, if you are going to use a VGA "D" connector, the I would use 75 ohm. > > This is a constant issue with many things -- 50 ohm vs 75 ohm. > > If you are going to use BNC connectors and 50 ohm, you really need to > design the circuit board so the three traces also have 50 ohm impedance. > Otherwise with ps rise times the trace will cause ringing if the > propagation time for the trace is more than half the rise time.
Uhm... are you saying that displays with BNCs are 50 Ohm? And that the cables with HD-15 on one end and BNC on the other have matching transformers hidden inside? I'm thinking not. _______________________________________________ Open-graphics mailing list [email protected] http://lists.duskglow.com/mailman/listinfo/open-graphics List service provided by Duskglow Consulting, LLC (www.duskglow.com)
