Is this SGI monitor truly fixed frequency?
Jared
Just got a 19" SGI monitor model 9330812 (HL7965KW-SG) for use with my
peecee. My question is, do I have to use a fixed frequency video card
with this. The specs say that it has a horizontal range of 30-78 KHz
and a vertical range of 50-130Hz. These ranges seem pretty wide for
something that is "fixed". I am using the monitor with a
fixed-frequency video card right now, but the card is not supported
under XFree86. I have a RivaTNT card that is supported and I would love
to use it, but I don't want to damage the monitor (and whether the Riva
would work in the monitor before I go to the trouble of installing it).
I know this is sort of off the beaten SGI track, but any help would be
appreciated.
thanks,
Jared
Rick McLeod
>
> Hi,
>
> Just got a 19" SGI monitor model 9330812 (HL7965KW-SG) for use with my
> peecee. My question is, do I have to use a fixed frequency video card
> with this. The specs say that it has a horizontal range of 30-78 KHz
> and a vertical range of 50-130Hz. These ranges seem pretty wide for
> something that is "fixed".
This monitor is not a "fixed frequency" monitor, but a "multisync"
or "autosync" monitor.
> I am using the monitor with a
> fixed-frequency video card right now, but the card is not supported
> under XFree86.
So, you mean by "fixed-frequency", that it only will work at a
VGA resolution and nothing else? Most video cards that support
resolutions above the standard VGA (640x480) do in fact supply
something more than one fixed frequency.
I have a RivaTNT card that is supported and I would love
> to use it, but I don't want to damage the monitor (and whether the Riva
> would work in the monitor before I go to the trouble of installing it).
> I know this is sort of off the beaten SGI track, but any help would be
> appreciated.
The monitor you have should be able to support 1280x1024 easily,
so I wouldn't think that the RivaTNT card would cause it any
trouble.
mcleod
--
Rick McLeod mcl...@sgi.com
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Developer Technical Program differences of degree, between
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All standard disclaimers apply
mar...@soundtech-lg.com
Rick,
Correct me if I'm wrong, but I think there is still one problem overlooked...
this monitor does not have separation of sync signal inputs, does it??. The
sync input is sent in along with the green input. Pc adapter cards have
separate sync pinouts. If I'm wrong, can you tell me if the 9330814 TFS6705KW
would be the same situation?
Silicon Graphics 9330812 (HL7965KW-SG)
Specifications
Input Signal
Video Signal : Analog
H Frequency : 30-78 KHz
V Frequency : 50-130 Hz
Sync Signal : Green, Composite
There are two primary measures of the maximum effective pixel addressability
and refresh rate that a monitor is capable of. The maximum rate that a
monitor can refresh the screen is measured in Hertz (cycles/second) and is
called the vertical refresh rate (or vertical scan rate). The horizontal
scan rate is the number of times that the monitor can move the electron beam
horizontally across the screen, then back to the beginning of the next scan
line in one second. Most early analog monitors were fixed frequency, meaning
that they were intended to work only at one specific vertical refresh rate
(often 60 Hz) and one horizontal rate (often this is expressed as a number
of pixels, but this isn't really the same). Most older SUN, SGI and other
workstation monitors were of this type. Generally, these monitors are
limited in their applications, since they require that the incoming video
signal falls within narrow timing specifications. These type of monitors also
typically use composite video signals (with sync on Green), so are not
compatible with most of today's PC graphics conntrollers. Also note that even
if the composite video signal issue is overcome, there are additional issues
related to attempting to use such monitors with a PC. Among these are DOS
text mode support.
Let me know please~~~
Martin
-----------== Posted via Deja News, The Discussion Network ==----------
http://www.dejanews.com/ Search, Read, Discuss, or Start Your Own
Rick McLeod
The 13W3 connection does allow for separate sync inputs. I
don't have the specifications for this particular monitor
available to me right now, but on many of our systems we
provided composite sync on pin 3, horizontal drive on pin 4
and vertical drive on pin 5 of the 13W3. This is in addition
to the sync signal superimposed on the green analog line.
>
> Silicon Graphics 9330812 (HL7965KW-SG)
> Specifications
>
> Input Signal
> Video Signal : Analog
> H Frequency : 30-78 KHz
> V Frequency : 50-130 Hz
> Sync Signal : Green, Composite
>
> There are two primary measures of the maximum effective
> pixel addressability and refresh rate that a monitor
> is capable of. The maximum rate that a monitor can
> refresh the screen is measured in Hertz (cycles/second)
> and is called the vertical refresh rate (or vertical scan
> rate). The horizontal scan rate is the number of times
> that the monitor can move the electron beam horizontally
> across the screen, then back to the beginning of the next
> scan line in one second.
Well, yes you're correct here.
> Most early analog monitors were fixed frequency, meaning
> that they were intended to work only at one specific
> vertical refresh rate (often 60 Hz) and one horizontal rate
> (often this is expressed as a number of pixels, but this
> isn't really the same).
Again, correct. But I don't understand the need for the
fundamentals here. I am fully aware of all this.
> Most older SUN, SGI and other workstation monitors were
> of this type. Generally, these monitors are limited in
> their applications, since they require that the incoming
> video signal falls within narrow timing specifications.
Unless, of course, the monitors were "autosync" or "multisync"
monitors like the 7965 we've been talking about. The fact that
the specifications for Horizontal and Vertical Frequencies
are *ranges* implies that the monitors are capable of working
within these ranges. This means that they are not fixed
frequency monitors.
> These type of monitors also typically use composite video
> signals (with sync on Green), so are not compatible with
> most of today's PC graphics conntrollers.
Unless, like the 7965, there are sync capabilities in the
monitor connection.
> Also note that even if the composite video signal issue
> is overcome, there are additional issues related to
> attempting to use such monitors with a PC. Among these are DOS
> text mode support.
Well, yes, there are old CGA modes that may be outside the
range of some multisync monitors. But if you use a VGA card
in your system and take advantage of the SVGA modes most of
these monitors will work just fine.
>
> Let me know please~~~
I thought I had already....
mar...@soundtech-lg.com
Sorry, I meant to place quote marks around the basic tech description in my
post. That was a description I had found in my own desperate search for
information on the SGI 9330814 TFS6705KW (Mitsubishi). It wasn't meant to
instruct, more to establish a starting point of general info relating to the
fixed freq. monitor to PC adapter problems. If you have access to info on the
13w3 pinout/signals on this monitor I would be most grateful. The main board
also has empty solder pads for an HD15 VGA connector, and and also an empty
9pin connector location as well. Mitsubishi used this same board for some of
their other monitor models as well I gather.
Thank you in advance,
Martin
In article <36F690C5...@esprit.engr.sgi.com>,
-----------== Posted via Deja News, The Discussion Network ==----------
mar...@soundtech-lg.com
Rick, I found this at
http://www.monitorworld.com/Cables/video_standards.html#13W3SGI Wondering if
this pinout holds true for all SGI monitors, in particular the 9330814
TFS6705KW ??
"13W3 SGI (Silicon Graphics)
1024 x 768 & 1280x1024
30-82kHz, 60-76Hz
Silicon Graphics manufacturers high end computers that are used in graphic
rendering and CAD/CAM applications. This computer generally operated at
two different frequencies (48kHz and 64kHz), which is determined upon boot
up. This computer type outputs sync RsGsBs, RGsB, RGVS and RGBHV.
Signal Type: Analog
Pin A1 - Red/Red Ground
Pin A2 - Green/Green Ground
Pin A3 - Blue/Blue Ground
Pin 1 - Monitor Type 3
Pin 2 - Monitor Type 0
Pin 3 - Composite Sync
Pin 4 - Horizontal Drive
Pin 5 - Vertical Drive
Pin 6 - Monitor Type 1
Pin 7 - Monitor Type 2
Pin 8 - Digital Ground
Pin 9 - Digital Ground
Pin 10 - Sync 2 "
Thanks again,
Martin
In article <36F690C5...@esprit.engr.sgi.com>,
mcl...@sgi.com wrote:
-----------== Posted via Deja News, The Discussion Network ==----------
Pauley, Ken
are surplus. We thought we might use them with some of our office PC's so
we picked up a 13W3 to HD15 adapters thinking it would be plug and play.
Can someone tell me if this will work at all, or if they know what I can do
to make this work?
Thanks
Ken Pauley
mailto:ken.p...@kla-tencor.com
mar...@soundtech-lg.com
You're entering into a big can of worms possibly, then on the other hand, you
may be able to just adapt the wiring, but first check here:
http://gama.inesc.pt/public/Info/REPAIR/F_Sync_Green1.html#SYNCGREEN_003
Lots of non-standardization on 13w3 plugs, and sync signal schemes.
Martin
In article <7d9gf1$5c...@sunami.kla-tencor.com>,
-----------== Posted via Deja News, The Discussion Network ==----------
Joe McCarthy
It is not hard to hook up the 20D11 monitors to a PC. You just need the right
cables and adapters. Software Integrators sells cables and adapters to do this.
Check out http://www.si87.com for more info.
Joe
"Pauley, Ken" wrote:
> I am in a similar situation. We have a bunch of SGI GDM-20D11 monitors that
> are surplus. We thought we might use them with some of our office PC's so
> we picked up a 13W3 to HD15 adapters thinking it would be plug and play.
> Can someone tell me if this will work at all, or if they know what I can do
> to make this work?
>
> Thanks
> Ken Pauley
> mailto:ken.p...@kla-tencor.com
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