SUMMARY: hooking up a cg3/cg4 to video...

From: Diab Jerius (
Date: Tue Nov 26 1991 - 15:06:19 CST

sorry about the late summary, i've moved...

my original query:

> i'm trying to hook a cg3/cg4 framebuffer output to some sort of video
> projector/large screen monitor. has anyone done this before? also,
> what are the horizontal scan frequencies of the cg3/cg4 outputs?

the responses were few enough that i've appended the relevant parts.
thanks to:

diab jerius harvard-smithsonian
internet: center for astrophysics
voice: (617) 496-7575 60 garden st., m/s 81, cambridge, ma 02138

Here, at the Delft University of Technology (EE Dep.), we use a
Sony 1270 VP type to do big screen video projection. We drive it
from both SUN and H-P workstations. Works without any problem ....

Erik Platzbecker |
Network Theory Section |
Department of Electrical Engineering |
Delft University of Technology | FAX : +31-15-623271
PObox 5031, 2600 GA Delft, The Netherlands | Phone : +31-15-783896
     We project all sorts of Suns & other high-res. equipment. We use a
Barco ceiling-mount projector. They make several styles, depending on your
requirements, including a "portable" back-projection unit. It's about the
size of a chest of drawers, but it has the advantages of being sort of
portable, and always adjusted correctly since its screen is built-in.

     I think the CG4 frame buffer works at 67hz. vertical, and 62.5Khz.
horizontal. The CG6 works at the same rates, but I'm not sure about the

                                               - Dave Edwards
                                                 MITRE Corp
If I remember right, the H scan frequency is 66Khz or so. We have an
Electrohome projection system that works. It may not be the best these days.
Might want to check out Hitachi or NEC.

Russ Poffenberger DOMAIN:
Schlumberger Technologies UUCP: {uunet,decwrl,amdahl}!sjsca4!poffen
1601 Technology Drive CIS: 72401,276
San Jose, Ca. 95110 Voice: (408)437-5254 FAX: (408)437-5246

This archive was generated by hypermail 2.1.2 : Fri Sep 28 2001 - 23:06:16 CDT