Re: iR genlock problems

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Javier Castellar (javier++at++sixty.asd.sgi.com)
Wed, 27 Nov 1996 17:42:10 -0800

> I am using pipes 0 and 1 at 2++at++1280x1024_60 and pipe 2 at 8++at++640x480_60, but I
> have no better luck when all pipes are at 1280x1024++at++60.
>
> Pipe 0's vertical sync is cabled to Pipe 1's genlock in. Pipe 1's gelock out
> is cabled to Pipe 2's genlock in. Pipe 2's genlock out is terminated. A
> scope shows that Pipe 2's genlock out is getting a 60Hz pulse, as expected,
> i.e., no obvious signal problem through the pipes.
>
> Using ircombine, pipe 0's sync is set INTERNAL; pipe 1 and 2's syncs are set
> EXTERNAL.

You have to provide as well the external sync format.
In the "Edit Globals" window, under the sync type (INTERNAL in first pipe and
EXTERNAL in second and third) you have to type 1280x1024_60.vfo.

sync: EXTERNAL
sync format: <the format to sync>.vfo

The iR DG4 has the ability to genlock with nearly any signal, as soon as you
said so.

In order to check if it is genlocked please use:

/usr/gfx/gfxinfo -v | grep Sync

I will be in IITSEC during next week, if is more urgent try to contact my
admin.

It know that it works, I have personally genlocked our 3 pipe iR, a 3 pipe
Onyx2 and nice 4 pipe Onyx2.

Try to genlock first couple by couple (i.e. 0->1 ) to be sure the cables are
right, one by one. It will reduce the number of variables.

Remember to terminate the last genlock out.

-Javier

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