From: Eric Kunze (ekunze++at++yacko.engr.sgi.com)
Date: 03/21/2000 10:41:52
Hi Gary,
You might want to check with the references I just sent Oliver, they may
help double check your cabling, etc.
If you are running stereo, then you actually need to have the sync output
set to horizontal. IR stereo formats have a special csync output on the hsync
in order to allow field matched genlock. There were some reasons why it
couldn't go on Composite having to do with monitor compatibility. The net
result is that for stereo formats, you need to have the sync output set to
Horizontal instead of composite for IR. ircombine knows this and will auto
select horizontal as your sync output when a stereo format is selected.
Also, f you are using one of the SGI 13w3->13w3+2BNC cables that break out H
and V sync from an Onyx2, you might want to check the cable. The early models
of this cable had the H and V connectors mismarked (H is V and V is H). You
can tell if you have this problem by looking at the part number on the cable.
If it ends in -001, then it is the old(reversed) cable. The -002 cables have H
and V properly marked.
Otherwise, make sure your sync setting is external, with sync format
correctly set in the "Edit Globals" window of ircombine. Make sure the genlock
loop on pipe 1 is terminated, and you should be set. If you are trying to
genlock unusual formats, you could try genlocking 1280x1024_60 first to check
that your cabling is correct, then move to the other format.
> However, I have managed to crash two pipes (and recover)
> with the following experiment...
>
> Setup a very small additional channel with ircombine, on
> pipe zero to output sync on green. Then use that sync on
> green as the pipe 1 genlock input.
>
> gfxinfo -v then says that we are genlocked. Pipe zero went
> totally screwy when I tried to load a different cmb file - I
> had to completely power down the onyx and power up - a reset
> and/or reload of any cmb file wasn't enough :-(
This is odd. You are only using pipe 0 for output. It should act normally as
you change combinations. I can see that pipe 1 might have problems if you
changed pipe 0's combination. Are you running the genlock cabling through pipe
0?
Eric
-- Eric Kunze ekunze++at++engr.sgi.com
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