Re: far away monitors

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Salvador Cabaruvias (sal++at++sgidev.mdc.com)
Thu, 3 Jul 1997 09:38:46 -0700

On Jul 2, 10:36am, Hendrik-Jan van Veen wrote:
> Subject: Re: far away monitors
> On Jul 1, 11:25, Leonardo Topa wrote:
> > Subject: far away monitors
> >
> > we need to move the monitor, keyboard and mouse of an ir-onyx2
> > equipped with a DG5-8 approx. 60 meters away from the main rack.
>
> We worked up to 40 meter with very high quality video cables (separate
> cables for RGBHV). If you need long distances and high bandwidth (e.g.,
> 2048x1180_72 gives 174Mpixels/sec) consider the ultra-high quality
> videocables that are used for camera's in the television industry. Just
> to mention a possibility (no price info):
>
> DIN 47394 96 IEC/75-17-1 2.7/17.3
> {2.7mm copper inner conductor, 22mm sheating, 3.6dB attenuation per
> 100m at 200MHz!}
>
> This is a very FAT cable but it gives you less than 3dB attentuation
> with 60m length! You have to solve connector problems though. Standard
> BNC won't fit to this cable, but you need to convert from 13W3 to RGBHV
> single cables anyway.
>
> The cable solution is probably the cheapest if you consider using
> multiple channels from your DG5-8 (otherwise consider Lightwave
> devices). Cables solutions for mouse/keyboard/serial tend to be
> difficult for long distances. You might need something else here, look
> into PC terminal switchers.
>
>

Sorry for being late to the party, but here is my 2 cents, we have our
monitors 200 ft away from IRs, in one case for Motion Base Simulator (MBS) and
the other in Fixed Base Simulator (FBS). We solved the problem two ways
because of different needs.

For the MBS, we used Covid Video Amplifiers which allows upto 300 ft without
signal loss, and is configured 1 input/4 outputs but doesn't solve the keyboard
and mouse issue. This is okay for MBS since we doen't do development there, so
the video signal is split, SGI monitors stay next to the IR, and video is
sent up to monitors on the MBS.

For the FBS, the oposite is true, we do alot of development there, so we
selected the Lightwave, which provides the video, keyboard, mouse
inputs/outputs. It is more expensive than any of other solutions mentioned
but I feel is worth it. Since we are in the simulator developing Performer
code there, having the IR interface right there was a great time saver.
for the MBS

-- 
---------------------------------------------------------------.
Salvador Cabaruvias       |     sal++at++sgidev.mdc.com             |
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CSSL                      |   "Well I be done seen about every | 
McDonnell Douglas             thing when I see an elephant     |
(310) 593-6719            |   fly"  --Dumbo--                  |
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