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OG Xbox Forums => Hardware Forums => Xbox Audio/Video Technical => Topic started by: dmx_wyrw on May 21, 2007, 02:30:00 PM

Title: Vga Cable More Compatible
Post by: dmx_wyrw on May 21, 2007, 02:30:00 PM
Hey is there a way to make the Vga cable with the sync splitter compatible with more moniters. I have a non sync on green moniter at home and i want to be able to use the same cable on a sync on green at school.  But it may not be sync on green.  perhaps if i add switches? to by pass the sync splitter.
I am going to school for computer electronics so feel free to be technical.

I'd rather keep it all in the same cable  i have a good size box that the splitter rests in.

Thank you
Title: Vga Cable More Compatible
Post by: FrostyTheSnowman on May 21, 2007, 02:41:00 PM
The sync-splitting circuit is compatible with both types of monitors, you do not need to 'un-split' the signal.

SOG monitors support both H/V (Sync-splitting) and also SOG signals, so if you build the Sync-splitting circuit, it will work for all monitors.  happy.gif
Title: Vga Cable More Compatible
Post by: dmx_wyrw on May 21, 2007, 02:54:00 PM
Thanks for the fast reply.  I have built the circuit.  the reason i asked was another monitor that i have tried it on didn't work. perphaps it is the resistor.  The monitor would flash on and off. and as for the moniter that works     720p is a little dark  and 1080 is ghosted
Title: Vga Cable More Compatible
Post by: FrostyTheSnowman on May 21, 2007, 02:58:00 PM
QUOTE(dmx_wyrw @ May 21 2007, 03:30 PM) View Post

Thanks for the fast reply.  I have built the circuit.  the reason i asked was another monitor that i have tried it on didn't work. perphaps it is the resistor.  The monitor would flash on and off. and as for the moniter that works     720p is a little dark  and 1080 is ghosted


Yeah, the sync-splitting circuit has been known to be incompatible with some monitors, but usually messing with the resistor fixes the problem.

Have you tried a 470k resistor?

And as for the 720p/1080i issue, that would be caused by either wiring or your monitor simply not liking the widescreen resolutions.

Also, are you 100% sure that your monitor at home is not sync-on-green? Because you could actually wire the circuit incorrectly, and sync-on-green monitors would still work, but non-SOG monitors wouldn't... I've seen this happen many times before by people accidentally wiring the LM1881N chip backwards...
Title: Vga Cable More Compatible
Post by: dmx_wyrw on May 21, 2007, 08:12:00 PM
That is interesting   the  monitor that works is quite a few years older than the one that doesn't so i don't think that its S-O-G.  yes i am using 470k
Title: Vga Cable More Compatible
Post by: FrostyTheSnowman on May 21, 2007, 11:01:00 PM
Have you double-checked you wiring to be sure everything is wired as it should be?