From: Michael Logan (mlogan++at++mail.arc.nasa.gov)
Date: 08/13/2001 11:06:52
Thanks to everyone who replied to this in July. Nigel, below,
pointed me to a French company that did have something usable.
I thought I'd share the experience.
Analog Way sells a box called the Graphics Switcher GS64 which
downconverts a variety of signals to to VGA or SVGA. The box
runs somewhere around $2500.. The support seems quite
good as well.
We bought ONE, not two yet, and seems to work quite nicely
if the output is connected to a normal monitor, or to a Kaiser
ProView-50ST. The signal is good, and the quality is
surprisingly good.
However, the Nvision HMD isn't quite working.. The picture
is tearing among the colors at the top of the eye, and shifted
near the bottom of the eye.
The Nvision Datavisor box works great with VGA input from
a PC, or from an Indigo2 using 4++at++640x480_60_ext format,
so I know both boxes are fine. Its just when I put the
GS64 together with the Nvision things don't work out quite
right.
The Nvision Datavisor is doing a VGA->FieldSequential
conversion itself, so maybe the signals aren't quite compatible
or something, but at least the Octane2 can now drive a
Kaiser Proview HMD.
I'm glad I found a "sort of" solution - well under $15k.
Michael Logan
NASA Ames Research Center
Human Factors and Performance Branch
"Caughey, Nigel (NBC, CNBC Europe)" wrote:
> HI Michael,
>
> If you need a down-converter check out Analogue Way, I've just put 22 in for
> our video wall ( I was using it to hertz rate change & genlock ), but it's
> nice kit.
>
> Nigel
>
> --
> Nigel Caughey
> CNBC Europe - Data Systems Manager
> Phone +44 207 653 9305 Cell +44 774 8182841
>
> -----Original Message-----
> From: Michael Logan [mailto:mlogan++at++mail.arc.nasa.gov]
> Sent: 18 July 2001 23:32
> To: info-performer++at++sgi.com
> Subject: OT: Dual-channel octane2 & a HMD
>
> Sorry for the non-performer-like question, but I could use some
> advice on how to use my HMD on the Octane2.
>
> I want to drive a N-vision VGA HMD and there aren't any VGA
> formats to choose from. The lowest res is 1024x768.
>
> Does anyone have an Octane2/V12/Dual-channel video format
> for 640x480?
>
> Will the VPro*.def files in the /usr/gfx/vfc/rules directory and
> VFC-1.2 allow me to do what I want?
>
> Cabling is another issue, but I'll keep searching the net on that
> topic...8)
>
> thanks,
>
> Mike Logan
>
> Human Factors Research Laboratory
> NASA Ames Research Center
> Moffett Field, CA
>
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This archive was generated by hypermail 2b29 : Mon Aug 13 2001 - 11:09:25 PDT