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ASUS PA32UCX

 
 
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Author tristansummers
ZRO
Male
#46 | Posted: 4 Mar 2021 19:59 
In order to set brightness and contrast while calibrating, it is easier to control the display by ddc. As there doesn't seem to be a ddc option in colourspace, and only one piece of hardware that isn't a probe can be connected, which is resolve, the only way i found was to use the asus software, which only works when usb and hdmi are connected to the same computer. Which doesn't work as it's only connected to the decklink, hence thinking maybe it's easier to close loop calibrate and miss out the Resolve machine complications
Maybe there is a way to have a remote version of colourspace running on the resolve machine, to control the asus. Guess I'm used to having ddc options in calman.
tristansummers

Author Steve

INF
Male
#47 | Posted: 4 Mar 2021 20:05 
I do not trust DDC controls - and set the peak luma via the OSD. There is no guarantee what the DDC is actual adjusting.
(Peak luma is all you need to set.)
Using the OSD to limit the backlight brightness means you will be minimising the black level, when calibrating for SDR.

That is why the User Guide says: "Before proceeding further, peak luma levels for the desired standard - SDR or HDR - should be set via the display's OSD Brightness control, using Manual Measure with a 100% white patch."

Steve
Steve Shaw
Mob Boss at Light Illusion

Author tristansummers
ZRO
Male
#48 | Posted: 4 Mar 2021 20:06 
Because to set contrast otherwise = press menu button, press down 4 times, across once, down once then realise you can't see the patterns because the menu is in the way, then move the probe because the menu goes all the way to the centre of screen.
It really needs a puck, dials, remote device control or something. I've just been spoilt by the Dolby.
tristansummers

Author Steve

INF
Male
#49 | Posted: 4 Mar 2021 20:08 
I have no such issues, using the 'joystick' on the back/side of the display...
But not sure which ASUS models have that control?

Steve
Steve Shaw
Mob Boss at Light Illusion

Author tristansummers
ZRO
Male
#50 | Posted: 4 Mar 2021 20:12 
That's what I'm trying to do!
Thanks for the input though.
Do appreciate it.
This is the only thread for this display, which is the only low rent over1000nit peak Dolby capable display at present.
tristansummers

Author Steve

INF
Male
#51 | Posted: 4 Mar 2021 20:16 
There are a couple of such displays, but all have similar FADL issue.
At the moment, the ASUS does seem to be the better option.

But, I do expect to see micro-led becoming the future choice....

Steve
Steve Shaw
Mob Boss at Light Illusion

Author evankultang
ZRO
#52 | Posted: 13 May 2021 21:44 
I just purchased the Asus PA32UCX and calibrating through LightSpace. I'm using Parallels to run LightSpace, and this could be why I'm unable to directly connect to the display for it's iTPG or LUT upload. I may need to purchase a windows laptop in the future.

My immediate concern is assessing the display before my return window ends. I've noticed that the dynamic dimming prevents SDR calibration. If you measure full screen white, and then a checkerboard pattern of black and white rectangles, the measured white is noticeably lower on the patterned screen. I thought the point of the backlight was to locally adjust to content? It seems as though the whole backlight is changing.

Is this behavior different in "high brightness mode"/HDR? If it isn't, I don't see how this display could ever be accurately profiled. Or perhaps the dynamic dimming works properly/locally in that mode?

Author Steve

INF
Male
#53 | Posted: 13 May 2021 21:52 
If the ASUS shows in Windows Device Manager I suspect you should be able to connect to it.
Are the correct drivers loaded?

And with the ASUS you should be using full screen patches, not windowed.
With FALD It's kinda the opposite of the ABL issue you have with other display technologies.

Steve
Steve Shaw
Mob Boss at Light Illusion

Author evankultang
ZRO
#54 | Posted: 13 May 2021 22:35 
Drivers installed, but no dice.

Using the full screen patches did produce a better result with dynamic dimming in SDR, but doing the same comparison after calibration of whites across different screens still showed wonky results... ~100 nits full screen, but then 93 in a checkerboard pattern. Disappointing!

Author Steve

INF
Male
#55 | Posted: 14 May 2021 07:35 
As stated, FALD is effectively the inverse of ABL.
So yes, you will see differences with checkerboards test patterns, or small patch windows, vs. full screen.

If you have the drivers installed, and cannot connect, it must be a Mac issue.
Have you checked any firewall?

Steve
Steve Shaw
Mob Boss at Light Illusion

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