28 Oct
2008
28 Oct
'08
4:34 p.m.
On Tue, 28 Oct 2008, Tony Duell wrote:
Not sure what you mean. If there's sync-on-green, it will be there. The
second adapter just happens to pass through H&V sync also. Both work when
the monitor is connected to the workstation through them. These are
strictly passive adapters - not to be confused with the Belkin adapter
which has active circuitry and handle keyboard and mouse along with video.
It connects to all of the above. I've already heard from just about
everyone (thanks!) that the +5V keyboard power is what it's looking for to
activate the port in the first place. One of the things I want to run
through it is video from one of my Amigas, so it appears I'll need to
build up a little 5V supply with a keyboard connector that I can use to
fool that port (since the Amiga 1200 has its own keyboard and mouse).
Sorry. In all cases I'm using a PC-standard VGA-VGA (HD15M-HD15M) cable.
I'm starting to suspect that the Belkin converter box may be defective, in
that it appears sync _is_ getting through while video is not. I can't
think of any other reason why the monitor comes out of standby and yet
displays a black screen. Will get a scope on it soonish and see what's
coming out.
Steve
--
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
video.
- 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
connected' detection. 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.