Does UltraStudio Monitor 3G work if connected to 4k monitor?

I got a LG 42inch TV for HDR content creation.
As of now I edit 4k footage on 1920x1080p 25fps timeline, my out put is mostly 1080p but at times I need 4k output too so I change timeline resolution to 4k & then output to 4k.

Planning to buy UltraStudio Monitor 3G which supports the following HDMI 2.0

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In Resolve there are separate output monitoring settings where it shows multiple resolution.

My understanding is that when I connect it to a 4K display through DaVinci Resolve, by default the 4k monitor will receive an HD signal, and the display itself will upscale it to 4K, but the UltraStudio Monitor 3G does not perform the upscaling.

I will have additional choice in Resolve output monitoring to select UHD resolution as seen below

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This UHD output solution will not be true 1:1 signal but doable, any downside to it, am I missing something?

Well, it works in UHD (not 4K), but you need to set your monitor settings accordingly (see attachment).
The downside is the load of such additional scaling. It works fine on my machine in 25 fps, but if your hardware is already on the edge for smooth playback, this may tip it. But without that setting you'll get a center crop. You need to make sure to switch it back for final rendering.
We all hope that BM might one day make a UHD version of that nice little device. But until now, there's nothing that compares for the price.

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Hi Uli,
Based on your feedback I got the Ultrastudio Monitor 3g & got it working in just 10 mins however I have landed in opposite kind of a problem which neither I anticipated nor I am able to understand why its happening.

As I plugged in for the very first time my 1920x1080p timeline shows full screen on 4k LG 42" TV, ideally it should show 1:1 pixel thus should have shown the output on 1920x1080 area of a UHD TV screen. I checked Super Resolution is set to OFF on TV so it should not be up scaling the incoming signal from UltraStudio 3g.

Ultrastudio

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I have tried all possible combination within Resolve input / output scaling however cant get 1:1 1920x1080 output without scaling on 4k tv.

Here are few of my settings which if you look at & can tell me how to get 1920 output?

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I checked Super Resolution is set to OFF on TV so it should not be up scaling the incoming signal from UltraStudio 3g.

It's an HD only device, the scaling is coming from your LG, not from Resolve or the Mini Monitor.

Good Luck

Yepp, it‘s the TV doing that. Actually, I don’t know any consumer UHD TV that doesn’t automatically upscale HD from its input.

Solved the problem although not sure sure if this is the right way to solve it.

1080p on UHD TV

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I had to switch Master settings> timeline format> Pixel aspect ratio Set to CinemaScope.

Pixel aspect set to cinemascope

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When I switch it back to Pixel aspect ratio > Square
I get full screen view on UHD screen

UHD view with Square pixel

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LG TV has options but I had already turned that off so its always set to "Just Scan" the incoming signal which in this case is limited to 1080p 25fps, it was Resolve which was upscaling the signal.

olved the problem although not sure sure if this is the right way to solve it.

It's not, the TC overlays are obviously way outside a 1920X1080 1:1 image.

it was Resolve which was upscaling the signal

Again, it's not, now you're just looking at an upscaled 960X540 image. On my LG "Just Scan" only means that you're getting the full image without ~5% overscan, not 1:1

Good Luck

It's not, the TC overlays are obviously way outside a 1920X1080 1:1 image.
Again, it's not, now you're just looking at an upscaled 960X540 image. On my LG "Just Scan" only means that you're getting the full image without ~5% overscan, not 1:1

Good Luck

I tried various settings so in 1 setting the TC overlays come over the image but shows stretched for cinemascope & the other setting shows TC & Image in correct ration but TC doesn't align over the image anymore, so I am confused now what is happening.

I have logged a case with LG service engineer who will visit to solve the problem if he can but meanwhile I asked ChatGPT about Just scan.

The "Just Scan" feature on LG C3/C4 TVs adjusts the way incoming video signals are displayed by disabling any unnecessary overscan processing. Overscan is a process where the TV zooms in slightly on the image, cropping off the edges of the frame. This is often done to hide unwanted visual artifacts that can appear along the edges of some broadcast signals.

When "Just Scan" is turned on, the TV displays the full, unaltered image as it is received from the source, showing every pixel without any cropping. This is particularly useful when you want a 1:1 pixel mapping, such as when connecting a computer or gaming console, where accuracy and full frame are essential.

Here's a quick overview of when you might use it:

Gaming: Ensures that no part of the game screen is cut off.
Computer Connections: Allows the screen to match the computer’s output exactly.
Content Creation/Editing: Allows you to view the entire image exactly as it is, which is important for accurate visual representation.

In summary, "Just Scan" is useful for situations where you want to avoid losing any part of the picture and ensure pixel-perfect display, ideal for precise visual work.

Can you share settings which you think might solve the problem in Resolve, or you think that LG TV doesn't let user play 1920x1080p at 1:1 pixel ratio?

If it doesn't then only option left with me is to return this Ultrastudio monitor 3g & will be forced to buy the bulky UltraStudio mini 4k which is 10X the cost & have features which I wont even need.

As mentioned in first post I work with UHD footage in Full HD timeline & need to monitor in full HD only, rarely (5% of times) I need to output in UHD.

Since your computer is portable, why not take it to some shops and try to find a TV that has the option?
I don't think that you can do anything in DR, since the Mini Monitor is definitely never sending UHD.
It's the TV doing that.

If you use clean feed output at UHD and set the mismatch to center crop then you'll get 1:1 from an HD timeline. Other than that it's likely a new monitor or the US4K Mini.

Good Luck

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If you use clean feed output at UHD and set the mismatch to center crop then you'll get 1:1 from an HD timeline. Other than that it's likely a new monitor or the US4K Mini.

Good Luck

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Thanks for the reply,
actually I have noticed that when I feed my TV via Ultrastudio Monitor 3g Resolve doesn't show me Clean feed option at all, if I remove the Ultrastudio 3g & directly connect via hdmi 2.1 cable, Resolve shows the option of clean feed & then your settings which you shared works fine & now I see center of TV showing me 1920x1080p video.

So basically Ultrastudio is not working as intended or I am missing something. Desktop Video Setup 14.2.1 is installed which is latest.

SO to test I have now added on TV HDMI 4 directly & HDMI 1 is connected via Thunderbolt 3 cable to Ultrastudio monitor 3g.
When these both are connected I can switch from HDMI 1 to HDMI4 of TV but resolve suddenly starts showing me the clean feed option but wont show correct image scaling on HDMI 1 (Ultrastudio3g) but will show correct option on (directly) HDMI 4 .

Utter confusion as to what is going on, I thought it would be simple plug & play with few settings within Resolve but seems like some things are not right.

Both Resolve and the US3G are working as intended. The monitor is not working as you expected. For the third or fourth time the US3G is only HD. If the monitor won’t pull true 1:1 then there’s no combination of settings that will deliver 1:1 on a 4k monitor.

Good Luck

You need to understand that the UM 3G is not just another GPU card.
It’s a designed to do nothing else but deliver the source out of DR without any influences by the OS straight to a calibrated display.
A so-called clean feed is a full size display out of your regular GPU card, which may look different more often than not.

If the monitor won’t pull true 1:1 then there’s no combination of settings that will deliver 1:1 on a 4k monitor.

UPDATE
LG factory engineer confirmed me that 42" TV cannot do 1:1 signal display within 1920x1080 area on a 4k monitor, its designed to display the incoming signal as 4k.

So I was wrong in my understanding.