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using gtx 275 .. how to connect video monitor and tv to card?



 
 
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  #1  
Old January 3rd 13, 09:10 PM posted to alt.comp.hardware.pc-homebuilt
johns
external usenet poster
 
Posts: 658
Default using gtx 275 .. how to connect video monitor and tv to card?

I tried using a dvi splitter on just the first dvi port .. one to
monitor, one to hdmi ( dvi to hdmi )
port on the tv. Whooeee! That did not work at all. The tv generated
some kind of goofy
problem with the card clock, and the whole thing went nuts. So, is it
possible to put
the tv on the 2nd dvi port on the back of the 275, and tell that port
it is going to a tv ..
without goofing up the first port timing and frame rate going to the
monitor ? I would like
to be able to choose which one I'm using, and shut the other off
without disturbing the
setup ... just want something like a desktop icon to choose which
monitor.

johns
  #2  
Old January 4th 13, 12:49 AM posted to alt.comp.hardware.pc-homebuilt
Paul
external usenet poster
 
Posts: 13,364
Default using gtx 275 .. how to connect video monitor and tv to card?

johns wrote:
I tried using a dvi splitter on just the first dvi port .. one to
monitor, one to hdmi ( dvi to hdmi )
port on the tv. Whooeee! That did not work at all. The tv generated
some kind of goofy
problem with the card clock, and the whole thing went nuts. So, is it
possible to put
the tv on the 2nd dvi port on the back of the 275, and tell that port
it is going to a tv ..
without goofing up the first port timing and frame rate going to the
monitor ? I would like
to be able to choose which one I'm using, and shut the other off
without disturbing the
setup ... just want something like a desktop icon to choose which
monitor.

johns


The high speed digital signals consist of "data+" and "data-".
The two signals behave the exact opposite of one another. And,
that's called differential signal transmission. The signals
are normally terminated by a single resistor across the two signals,
on the receiving display device.

Simple-minded passive splitters, they send "data+" to one monitor, and
"data-" to the other monitor. The signal level is around half of
the normal amplitude.

A better solution, is an active buffer.

http://www.gefen.com/kvm/dproduct2.jsp?prod_id=3571

There is one DVI in, and two DVI out. Of the two DVI out,
one is designated the "primary" output. The EDID (resolution
table) of the primary monitor, is used by the OS when it
comes time to select a resolution. The EDID of the second
monitor is disconnected. The second monitor is "slaved"
(not in control of its own destiny).

In order for the slave to receive a valid signal, you have
to find a resolution that both display devices share.
With the primary device only connected, you use the Windows
display control to set the display to that "common" value.
Then, when the secondary display is connected to the second
connector, it receives a valid signal right away. (It isn't
that important to do it that way, and I'm mainly explaining
this to give some idea how it works.)

If you just connect both monitors, and select a resolution
to drive the Primary display, without thought to the
secondary, then the secondary will pop up its OSD
and say "Out Of Range" to the incoming signal. When
a resolution they both share is selected, then both
screens will have the same content viewable.

That works better than the missing "mirror mode", removed
from the Nvidia driver years ago.

Summary: Buy an active buffer. Read the manual for it
before you buy, to understand how it works.

Note - when I use a Gefen product as an example, it
doesn't mean to run out and buy one. Gefen stuff is
expensive. The above box is $350, and has its own
wall adapter. There's no particular reason such
a box should cost $350. Look around.

Here's one for $80. Users aren't that pleased, perhaps
because the manual sucks and didn't explain things well ?

http://www.newegg.com/Product/Produc...82E16817422028

That one includes a power adapter, so you know it's "active"
and not a ripoff "passive" type.

OK, the manual has no details, as to which output connector
is the "primary" and has the EDID connected to the computer.
So this is a "buy and pray" product.

http://aluratek.com/cms/legacy/downl...ADS04F_QSG.pdf

*******

At the $350 price point, not only would I expect a DVI splitter,
I would expect a scalar as well. In the crappy example I made
up below, the scaler scales the output to a lower resolution that
the secondary monitor supports. The secondary monitor EDID is
read by the scaler. The primary monitor EDID is read by
the computer. This is the kind of function I'd expect for
$350.

Computer ---- 1920x1080 ------ splitter/scaler ----- 1920x1080--- primary
|
+---- 640x480 --- secondary

To just digitally buffer the DVI signal, shouldn't cost
$350 to build. Unless, of course, you're running it
through a scalar, and leaving the resolution the
same anyway. (Effectively null digital regeneration.)

*******

Perhaps what you're looking for, is a KVM of some
sort, if you seek to randomly turn off one of the
monitors. But a KVM doesn't generally "broadcast" to
two monitors at the same time. So a KVM is not a splitter,
and a splitter is not a KVM, if you get my drift.

It's possible if you go to a KVM manufacturer site, you
can find something that does what you want.

You can undoubtedly get the function you seek, for
$1000 or so. But for less money, you can get something
approximately "good enough".

It really all depends, when the primary monitor has its
screen switched off with the soft power button, whether the
EDID remains available or not. In theory, the EDID should
still be working. But we can't be sure of that, and perhaps
instead the secondary monitor goes nuts and the resolution
is set to something silly. So while the active splitter
may come very close, there might still be monitor mixes,
where you'll need to leave the primary powered up.

Anyway, even if I didn't do a good job of answering
your question, at least dump the passive splitter.
Because it's just a bad idea.

Paul
  #3  
Old January 4th 13, 05:39 AM posted to alt.comp.hardware.pc-homebuilt
johns
external usenet poster
 
Posts: 658
Default using gtx 275 .. how to connect video monitor and tv to card?

Anyway, even if I didn't do a good job of answering
your question, at least dump the passive splitter.
Because it's just a bad idea.


Thanks. Looks like I've got some reading to do. I notice in my
Nvidia setup panel, there's an option to set up a tv. Wonder if
that tells one of the dvi ports its going to a tv, and don't mess
with the other monitor ? Fat chance, but ??

johns
  #4  
Old January 4th 13, 06:48 AM posted to alt.comp.hardware.pc-homebuilt
Paul
external usenet poster
 
Posts: 13,364
Default using gtx 275 .. how to connect video monitor and tv to card?

johns wrote:
Anyway, even if I didn't do a good job of answering
your question, at least dump the passive splitter.
Because it's just a bad idea.


Thanks. Looks like I've got some reading to do. I notice in my
Nvidia setup panel, there's an option to set up a tv. Wonder if
that tells one of the dvi ports its going to a tv, and don't mess
with the other monitor ? Fat chance, but ??

johns


OK, it's a GTX 275.

I tried an image search, and got a picture like this.

http://images.bit-tech.net/content_i...5-review/1.jpg

I see a mini-DIN at the top of the card, and that's your "TV"
connector. See if your card has one of those.

There are other models, that only have digital connectors
on the faceplate (no TV).

Mini-DIN come in a number of pin counts and configurations.
And whether the card is ATI or NVidia, also affects the pinout
(which pin has which signal on it).

I seem to remember a site that had the pinouts all on one
page, so you could compare them. I don't seem to have that
bookmarked, and the info on Wikipedia isn't good enough for this.

They used to provide a breakout cable with the mini-DIN, like
composite, SVideo (4 pin), or component (YPbPr). But in later
years, they'd sometimes put the connector on the card, and
not put the right cable in the box. I've got one card here,
all it comes with is an SVideo 4 pin to 4 pin cable. Whereas
the high quality output would be the analog YPbPr one (coax
connectors in red, green, and blue).

This isn't exactly it either, as this is a VIVO cable,
but at least it illustrates the notion of "breakout".
Do you remember getting a cable like this ? I suppose
if there's no mini-DIN on your card, then you
won't remember seeing one of these.

http://en.wikipedia.org/wiki/Video-in_video-out_(VIVO)

Paul
  #5  
Old January 4th 13, 04:58 PM posted to alt.comp.hardware.pc-homebuilt
Chris S.[_3_]
external usenet poster
 
Posts: 64
Default using gtx 275 .. how to connect video monitor and tv to card?


"Paul" wrote in message
...
johns wrote:
Anyway, even if I didn't do a good job of answering
your question, at least dump the passive splitter.
Because it's just a bad idea.


Thanks. Looks like I've got some reading to do. I notice in my
Nvidia setup panel, there's an option to set up a tv. Wonder if
that tells one of the dvi ports its going to a tv, and don't mess
with the other monitor ? Fat chance, but ??

johns


OK, it's a GTX 275.

I tried an image search, and got a picture like this.

http://images.bit-tech.net/content_i...5-review/1.jpg

I see a mini-DIN at the top of the card, and that's your "TV"
connector. See if your card has one of those.

There are other models, that only have digital connectors
on the faceplate (no TV).

Mini-DIN come in a number of pin counts and configurations.
And whether the card is ATI or NVidia, also affects the pinout
(which pin has which signal on it).

I seem to remember a site that had the pinouts all on one
page, so you could compare them. I don't seem to have that
bookmarked, and the info on Wikipedia isn't good enough for this.

They used to provide a breakout cable with the mini-DIN, like
composite, SVideo (4 pin), or component (YPbPr). But in later
years, they'd sometimes put the connector on the card, and
not put the right cable in the box. I've got one card here,
all it comes with is an SVideo 4 pin to 4 pin cable. Whereas
the high quality output would be the analog YPbPr one (coax
connectors in red, green, and blue).

This isn't exactly it either, as this is a VIVO cable,
but at least it illustrates the notion of "breakout".
Do you remember getting a cable like this ? I suppose
if there's no mini-DIN on your card, then you
won't remember seeing one of these.

http://en.wikipedia.org/wiki/Video-in_video-out_(VIVO)

Paul


This eBay seller has this.....
http://www.ebay.com/itm/261142320233...84.m1558.l2649

Any help?

Chris

  #6  
Old January 4th 13, 05:35 PM posted to alt.comp.hardware.pc-homebuilt
Paul
external usenet poster
 
Posts: 13,364
Default using gtx 275 .. how to connect video monitor and tv to card?

Chris S. wrote:

"Paul" wrote in message
...
johns wrote:
Anyway, even if I didn't do a good job of answering
your question, at least dump the passive splitter.
Because it's just a bad idea.

Thanks. Looks like I've got some reading to do. I notice in my
Nvidia setup panel, there's an option to set up a tv. Wonder if
that tells one of the dvi ports its going to a tv, and don't mess
with the other monitor ? Fat chance, but ??

johns


OK, it's a GTX 275.

I tried an image search, and got a picture like this.

http://images.bit-tech.net/content_i...5-review/1.jpg


I see a mini-DIN at the top of the card, and that's your "TV"
connector. See if your card has one of those.

There are other models, that only have digital connectors
on the faceplate (no TV).

Mini-DIN come in a number of pin counts and configurations.
And whether the card is ATI or NVidia, also affects the pinout
(which pin has which signal on it).

I seem to remember a site that had the pinouts all on one
page, so you could compare them. I don't seem to have that
bookmarked, and the info on Wikipedia isn't good enough for this.

They used to provide a breakout cable with the mini-DIN, like
composite, SVideo (4 pin), or component (YPbPr). But in later
years, they'd sometimes put the connector on the card, and
not put the right cable in the box. I've got one card here,
all it comes with is an SVideo 4 pin to 4 pin cable. Whereas
the high quality output would be the analog YPbPr one (coax
connectors in red, green, and blue).

This isn't exactly it either, as this is a VIVO cable,
but at least it illustrates the notion of "breakout".
Do you remember getting a cable like this ? I suppose
if there's no mini-DIN on your card, then you
won't remember seeing one of these.

http://en.wikipedia.org/wiki/Video-in_video-out_(VIVO)

Paul


This eBay seller has this.....
http://www.ebay.com/itm/261142320233...84.m1558.l2649


Any help?

Chris


Well, first you look at the pin count on your mini-DIN,
before jumping for joy. Notice how a 7 pin, would not
fit a 9 pin video card.

http://en.wikipedia.org/wiki/Mini-din

The 4 pin S-Video, fits just about all the connectors.

http://en.wikipedia.org/wiki/S-Video

But a full breakout cable, you'd likely need to more carefully
match it to what is on your faceplate. One of the pin counts
would be for VIVO (not likely to be on the GTX 275), while a
connector with a couple fewer pins might be video out only.
So it could well be, that the 7 pin is the right one - I'd just
advising to do your homework first, so you don't end up with a
drawer full of useless cables. They're not all fully interchangeable,
and there can even be differences between how ATI and NVidia
do it (same pin count, different pin usage).

Paul
 




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