16 Apr
2013
16 Apr
'13
2:20 p.m.
I used the same cable that was originally connected to the original CRT
monitor. The cable was at least 6 foot long, straight through DB9 on both
ends. I was getting blurring and ghosting on the VGA monitor using this
long cable. I did not have any terminations once I connected the Sun to the
extron 201xi. perhaps I could have put some terminating resistors on the
end of the cable connecting to the Extron. The 6 inch cable with unsheilded
straight 20 guage wires worked just fine. I found a schematic for the frame
buffer card in the SUN, and it had a resistor termination scheme along with
the 10H131 chips , but not sure what's at the Extron 202xi input. The just
sharing with the group the results. I'm sure improvements could be made to
allow for a longer cable.
On Tue, Apr 16, 2013 at 3:02 PM, Tony Duell <ard at p850ug1.demon.co.uk> wrote:
--
e-?
website. When
making my cable from the Sun to the Extron, I had to keep
it
very short ...6 inch...because the ECL had a
problem with long cables.
The
THat suprises me. An ECL line driver (and I assume that's waht Sun used)
should eb able to drive a fairly long cable provided it is of a suitable
type and correctly terminated.
What cable were you sueing, and how did you terminate it?
-tony