Help with Sun video
ard at p850ug1.demon.co.uk
Tue Oct 28 14:11:21 CDT 2008
> I'm hoping someone can shed light on this. For the past week, I've been
> battling to get my Sun Ultra-60 video switchable through a Belkin 8-port
> KVM switch. The monitor is a Samsung 214T 20" LCD.
> - Connect monitor directly to workstation with a 13W3 Sync-On-Green
> adapter (no passthrough of sync signals): Works fine.
> - Connect monitor directly to workstation with a 13W3 adapter that brings
> out H+V sync: Works fine.
Does this adapater do anything to the green signal? Is it possile that
the monitor is still using sync-on-green and ignroing the H and V Syncs
from the adapter (if, indeed, they're even active)?
> - Connect either of the above to a port on the KVM switch: Switch does
> not recognize that anything is connected and refuses to pull in the relay
> (I can hear an audible click from any channel with recognized video). The
> status LED on the KVM keeps flashing to say "no one there!". Obviously no
> - Purchase Belkin Sun adapter box from eBay and connect it between the U60
> and the KVM: KVM recognizes that video is there and pulls in the relay.
Does this just connect ot the video port on the switch, or to the
keyboard and/or mouse ports as well? It wouldn't suprise me if checking
for +5V on, say, the keyboard port was part of the 'I have a computer
If it does just connect to the video port, it's possible that the swithc
needs active sync signals on the H and/or V lines. Have you stuck a
'scope on the outputs of the adapter to see just which signals are active?
> The monitor _seems_ to believe that something is there, as the blinking
> green "nothing attached to me" LED goes solid on. However, nothing ever
> appears on the screen. I tried all DIP switch settings on the adapter
> (connected to Sun monitor sense lines).
> - In desperation, connect monitor directly to HD15 port on the Belkin
> adapter: Same thing. Solid green LED, no display.
Do you use the same connector on the monitor in all tests, or are the
first 2 using BNC sockets or similar? It's possible the the monitor
wi;ll not accept sync-on-green over the DE15 connector.
It would be intereting to know what, if anything, is coming out on the H
and V lines of that adapter
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