From: Peter Oslej (peterO++at++vrm.sk)
Date: 01/19/2001 08:31:17
Hello Max,
thank you for answer. Please see my details bellow and enclosed gfxinfo :
----- Original Message -----
From: Max Waterman <maxw++at++sgi.com>
To: Peter Oslej <peterO++at++vrm.sk>
Sent: Thursday, January 18, 2001 5:46 PM
Subject: Re: Onyx genlocking
> Peter Oslej wrote:
> >
> > Hello all,
> >
> > I still remember performer-info mail exchange about genlock
synchronisation
> > Onyx's pipes last year.
> > Now we are facing the same problem. We have to run 4 channels
application
> > on 2 pipes Onyx2 with
> > continuous screen. We have done :
> >
> > 1. Pipe 0 is connected by 13W3+2BNC adaptor and coax cable (55 Ohm ) to
>
> I'm not sure what the impoedence of the cable should be, but it should all
> be terminated with a 75 ohm terminator, so I suspect the cable should be
> 75 ohm too.
>
> > Pipe1 to Genlock IN connector.
> > (13W3+2BNC adaptor has lable 018-0834-002 Rev. A , but coax cable
has to
> > be connected by H sync BNC connector !! ;
>
> OK, you have the more modern pig-tail cable, which has the sync's labelled
> correctly.
>
> > by V sync BNC is not able to syncronize the second pipe)
>
> How do you detetmine that it isn't sync'd? You should be able to syn
> the pipes with the V sync, but you'll (obviously) only sync every vsync).
> If you make the H connector output a composite sync (H+V) then you'll
> sync to both, which is fine too. You can alter what comes out of the H
> with ircombine. You *need* to have it as H-sync only if you're running
> stereo vfo's.
>
I have set SyncOutput to Composite by ircombine. When I connect to V sync,
Pipe 1 is not running ,it is black...
> >
> > 2. With /usr/gfx/ircombine we set external source for pipe 1. Pipe 1 is
> > running genlocked with pipe 0. /usr/gfx/gfxinfo -vv
> > says : Source : External Genlocked : True (Should be genlocked)
>
> Yup, that should be definitive. If it says it's genlocked, then it should
> be. I haven't heard of gfxinfo being wrong.
>
> >
> > 3.We run perfly -G town.pfb (G means gangdraw ); When pipes are not
> > genlocked , performer warns about
> > shifting phase between pipes when running multipipes apps , now
after
> > genlocking is silent -> pipes should be genlocked.
>
> perfly just does some measurements, which can be inaccurate. Pay attention
> to gfxinfo rather than perfly output.
>
> >
> > BUT runnig perfly the image on the edge bettween pipes is jumping,
> > skipping .... -> pipes do not swap the same buffer on the same
> > time . Why ?
>
> What vfo's are you running? What combination? Send us the output of
> gfxinfo (withouth -vv).
See enclosed gfxinfo.
For what purposes is SwapReady connector ?
Should I connect it on pipes ?
PfPipeWindows man pages in the "Gang Swap" section says about second
condition :
connecting SwapReady connector on pipes with " simple BNC cable of any
Ohms."
I try this , but no changes (still skipping )
Thanks forward
Peter Oslej
>
> >
> > Can somebody help me ?
>
> Yes, this is what customer support is for. Please call us.
>
> Thanks.
>
> Max.
>
> >
> > Thank you
> >
> > Peter Oslej
> > VRM Ltd.
> > Slovakia
> >
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> > Open Development Project: http://oss.sgi.com/projects/performer/
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>
>
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