UltraStudio 4K Mini monitoring

How to use OmniScope with UltraStudio 4K Mini and a reference monitor on the same Mac

If you're using the Blackmagic UltraStudio 4K Mini with HDMI out to a reference monitor and OmniScope shows no signal, the fix is a simple SDI loopback cable.

Quick Tip: OmniScope + UltraStudio 4K Mini setup

The Problem

The UltraStudio 4K Mini sends your video over HDMI to the reference monitor, but OmniScope needs an SDI signal to analyze the video. Without an SDI input, OmniScope has nothing to capture.

The Solution

Connect a short SDI cable from the SDI OUT port back into the SDI IN port on the UltraStudio 4K Mini. This creates a loopback that feeds the same video signal back for OmniScope to capture.

Signal Flow

The full signal path looks like this:

1. Mac sends video over Thunderbolt to the UltraStudio 4K Mini

2. HDMI OUT goes to the reference monitor (your monitoring stays exactly the same)

3. SDI OUT loops back into SDI IN via a short SDI cable

4. OmniScope captures the signal from the SDI input

You're simply adding a parallel path for scopes — your existing monitoring workflow is not affected.

Setup Summary

Connection	From	To
Thunderbolt	Mac	UltraStudio 4K Mini
HDMI	UltraStudio 4K Mini	Reference Monitor
SDI (loopback)	SDI OUT	SDI IN

OmniScope Configuration

Open OmniScope, go to Connect To and select the UltraStudio 4K Mini as your input device.

That one SDI loopback cable is usually the missing piece when OmniScope shows no signal with the UltraStudio 4K Mini.