Jean Daigle (jaydee++at++ATSaerospace.com)
Thu, 24 Oct 1996 14:34:03 -0400
On Oct 24, 6:03pm, knoepfle++at++igd.fhg.de wrote:
...
} this is not a performer-question, but I don't know a better a place...
Ditto.
} We want to use Shutter-Stereo on a 3-Pipe ONYX IR (format: 1024x768_120s). We
} get the stereo-sync from Pipe 0. When you wear your stereo-glasses the picture
} on Pipe 0 is ok, but on pipe 1 and 2 we see a horiz. dark bar [shutter signal
} doesn't correspond to vertical sync of the pipe].
}
} It seems that we have to genlock(!) all three pipes. We tried several ways, but
} none of them really worked.
I think all pipes must be using the same video rate in order for
genlocking to work. Is this the case with your setup? I.e., are
you running the same .cmb file on each iR pipe?
} Does anyone of you know how to do
} a) the cabeling
} b) configuration via ircombine [unfortunatelly we can't use setmon, because it
} crashes on pipe 1 and 2 :(]
}
} to genlock all three pipes ?
...
}-- End of excerpt from knoepfle++at++igd.fhg.de
a) For cabling, use video-impedance (75 ohm?) coax to cable
- pipe 0 H/C Sync Out to pipe 1 Genlock In
- pipe 1 Genlock Out to pipe 2 Genlock In
Also, terminate pipe 2's Genlock Out connector with a 75-ohm
terminator.
Here's a question for more knowledgeable people: Are the framelock
(a.k.a. Swap Ready) outputs still used on iR? If so, it's necessary
to put a BNC tee on one pipe's Swap Ready, and cable the remaining
two to it.
b) You should be able to use ircomine in command-line mode, something
like
setenv DISPLAY :0.0
/usr/gfx/ircombine -source file x.cmb -destination eeprom \
-target 0:0
/usr/gfx/ircombine -source file x.cmb -destination eeprom \
-global syncsource=EXTERNAL -target 0:1
/usr/gfx/ircombine -source file x.cmb -destination eeprom \
-global syncsource=EXTERNAL -target 0:2
/usr/gfx/stopgfx; /usr/gfx/startgfx
That is, genlock is enabled on the higher two pipes by activating
external sync. This is _not_ specified for pipe 0, which is the
sync MASTER (i.e., generates sync internally).
Also note that pipe 0's Genlock Out is _not_ the sync source. SGI
documenation sometimes refers to this as "Genlock Loop" -- it's wired
internally to Genlock In on the same pipe to facilitate driving
multiple slaves from a single master.
This being said, I still have problems with genlock on a
3-pipe Onyx iR running Performer 2.1 and IRIX 6.2.
I have cabled as above (Swap Ready & Genlock), and run setmon
on the 3 pipes with the same .cmb format, and -g specified for
pipes 1 and 2 (not pipe 0).
Everything seems fine -- no crashes, and graphics come up on
all three pipes.
However, running perfly produces dire warnings about lack of
genlock on the various pipes, and indicates rather large phase
offsets between pipes.
I ultimately conceded defeat in this matter with Performer 2.0/
IRIX 5.3/3-pipe Onyx RE^2 + MCO. Has anyone succeeded with Performer
2.1/IRIX 6.2/3-pipe Onyx iR?
Are the warnings issued by Performer spurious? If so, how can
one convince oneself that genlock is working?
I would _really_ appreciate hearing anyone's success story with
multipipe iR genlock.
Regards,
Jean Daigle.
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| Jean Daigle ATS Aerospace Inc. |
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