DVI vs Analog ...


D

DLenos

I upgraded to a 19" LCD w/ DVI input... my 9600 AIW does not have DVI. If I
upgraded to the AIW9800 w/ DVI will I get a noticable improvement in image
display?
 
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C

Conor

I upgraded to a 19" LCD w/ DVI input... my 9600 AIW does not have DVI. If I
upgraded to the AIW9800 w/ DVI will I get a noticable improvement in image
display?
[/QUOTE]
Not that you'll notice.
 
J

J. Clarke

DLenos said:
I upgraded to a 19" LCD w/ DVI input... my 9600 AIW does not have DVI. If
I upgraded to the AIW9800 w/ DVI will I get a noticable improvement in
image display?

Maybe. Probably not.
 
B

Barry Watzman

That depends.

In most cases it's possible to adjust an analog display so that the
difference between it and DVI is insignificant. However, it requires
some knowledge and a test pattern.

Without adjustment, the difference can be very, very significant.

[What's being adjusted is the monitor's "dot clock" frequency and phase.
The "auto" settings almost never result in exactly the right settings.
The test pattern is vertial bars, alternating black and white, each
bar being one single pixel wide.]]
 
F

Fred at Home

Barry Watzman said:
That depends.

In most cases it's possible to adjust an analog display so that the
difference between it and DVI is insignificant. However, it requires some
knowledge and a test pattern.

Without adjustment, the difference can be very, very significant.

[What's being adjusted is the monitor's "dot clock" frequency and phase.
The "auto" settings almost never result in exactly the right settings. The
test pattern is vertial bars, alternating black and white, each bar being
one single pixel wide.]]

Do you have a clue?
 
F

Fred at Home

DLenos said:
I upgraded to a 19" LCD w/ DVI input... my 9600 AIW does not have DVI. If I
upgraded to the AIW9800 w/ DVI will I get a noticable improvement in image
display?
I have a 9800XT with both VGA and DVI outputs. On my Benq 19" LCD there is a
noticeable improvement in using the DVI connection.
 
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J

J. Clarke

Fred said:
Barry Watzman said:
That depends.

In most cases it's possible to adjust an analog display so that the
difference between it and DVI is insignificant. However, it requires
some knowledge and a test pattern.

Without adjustment, the difference can be very, very significant.

[What's being adjusted is the monitor's "dot clock" frequency and phase.
The "auto" settings almost never result in exactly the right settings.
The test pattern is vertial bars, alternating black and white, each bar
being one single pixel wide.]]

Do you have a clue?

Actually, he has a pretty good clue. The LCD displays I've seen lately
managed to do all right on analog on the auto settings, but some of the
older ones were pretty terrible.

In some cases you can adjust the monitor, more likely you end up having to
adjust the video board to match the monitor's needs.
 
G

gw

I am trying to connect my 19" Benq monitor to the DVI outlet using a DVI
cable. I do not get any video whatsoever. If I use the Analog cable with a
DVI adapter plug I get video just fine.
My card is the Radeon 9800 with DVI.
I initially installed the card drivers when I was connected witht he analog
cable ---is this my problem or am I missing something really easy????
Gary W
 
G

GoFishing

I am trying to connect my 19" Benq monitor to the DVI outlet using a DVI
cable. I do not get any video whatsoever. If I use the Analog cable with a
DVI adapter plug I get video just fine.
My card is the Radeon 9800 with DVI.
I initially installed the card drivers when I was connected witht he analog
cable ---is this my problem or am I missing something really easy????
Gary W

Your monitor apparently comes with both DVI and CRT connectors. My
Dell 1703FP flat panel also both connectors. When I use DVI cable, I
have to tell the panel that it is in the DVI mode by pressing a button
on the front control panel.

You may also have to somehow set your monitor to the DVI mode.

rod
 
G

gw

Thanks for the help. I have found the soft-key selection on the moniter to
switch it to DVI but the selection panel does not open up unless there is a
signal from the pc - must be a Benq "thing" If I connect to the PC with the
analog cable I can make the DVI selection but it will not stay in that
position due to the analog signal. If I connect the DVI cable then I have no
menus on the LCD. I have two almost identical systems to hoook up so I know
both moniters work the same way. I have the Geoforce VIVO DVI card in th
eother PC so it is now time to play with it...
Great way to spend Xmas day :(

All the best anyway

Gary W
 
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J

Jason Ash

To me, that's the point to track down a tech support number for BenQ, and
raise hell.

Every LCD I've seen that comes with both connectors, once switched from
one to the other, should stay that way.

A tech where I work came up with a unique (at the time) solution for a
client who needed to keep their old PCs on the desk, while still being
able to use their shiny new Dells. The client had bought the 15" Dell
LCD, with both DVI and analog inputs. The tech ran the analog cable to
the old PC, and the DVI to the Dell. The LCD had a button on the front
to switch inputs, so the client was able to easily switch from one to the
other.

Still had two keyboards and mice on the desk though, so not as perfect a
solution as a switch box would have been, but the old PCs were going away
in a month or so anyway...

Luck.

Thanks for the help. I have found the soft-key selection on the
moniter to switch it to DVI but the selection panel does not open up
unless there is a signal from the pc - must be a Benq "thing" If I
connect to the PC with the analog cable I can make the DVI selection
but it will not stay in that position due to the analog signal. If I
connect the DVI cable then I have no menus on the LCD. I have two
almost identical systems to hoook up so I know both moniters work the
same way. I have the Geoforce VIVO DVI card in th eother PC so it is
now time to play with it... Great way to spend Xmas day :(

All the best anyway

Gary W



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D

David T. Metz

Fred said:
Barry Watzman said:
That depends.

In most cases it's possible to adjust an analog display so that the
difference between it and DVI is insignificant. However, it
requires some knowledge and a test pattern.

Without adjustment, the difference can be very, very significant.

[What's being adjusted is the monitor's "dot clock" frequency and
phase. The "auto" settings almost never result in exactly the right
settings. The test pattern is vertial bars, alternating black and
white, each bar being one single pixel wide.]]

Do you have a clue?

Apparently you don't?

David
 

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