Setting Up OmniScope for Gamut Error Checking

Gamut errors occur when colors fall outside the acceptable range for broadcast or digital standards. This guide covers how to configure OmniScope for effective gamut error checking.

Detecting Out-of-Gamut Signal

Connecting with DeckLink / UltraStudio

To accurately detect out-of-gamut signals when monitoring through DeckLink or UltraStudio devices, set your signal to Video range and enable Retain sub-black and super-white data in the Video Monitoring settings:

DaVinci Resolve Video Monitoring settings

In OmniScope, verify that the video range settings for your I/O card are correctly configured:

OmniScope I/O card signal range settings

For monitoring in RGB format, enable the Expect video range checkbox to capture all out-of-gamut values.

Using OpenFX Plugin in Resolve

If you're connecting via the OpenFX plugin in DaVinci Resolve, confirm that you're using Video range signal in the Timeline settings of the OFX:

OFX plugin timeline signal range

The OpenFX plugin transmits sub-black and super-white signals to OmniScope, enabling comprehensive gamut checking.

Configuring OmniScope

With the signal sources set up, disable automatic signal scaling to the full range so that adjustments made in Resolve are preserved:

Disable automatic signal scaling

Once disabled, out-of-range signals will be directly visible in the waveforms:

Out-of-gamut values visible in waveforms

Enable the Gamut Check in the QC menu and start the Error Logger. This creates a list of all gamut error events, which can be exported to a CSV file:

QC Error Logger

For more details on signal range configuration, see Signal Range.