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SDI-GPI Link

Connect » Real-Time Signal Transfer » Video Interfacing & Conversion » Standalone interfacing, signal processing and conversion »

The SKAARHOJ SDI-GPI Link box will accept 16 digital inputs from your video infrastructure and convert them into Blackmagic Camera Control Tally signals. This will for instance enable any video switcher with tally contact closure outputs to send essential tally information to your supported Blackmagic cameras such as URSA Mini (+Pro) or Studio Camera series.


Features how does it work DB25 Connector Configuration Example of possibilities in the web interface

From the factory the box is configured to control camera IDs 1-8. When input 1-8 is closed to GND, the red tally flag for camera 1-8 respectively will be set on the SDI output from the box. Likewise input 9-16 (on the same DB25 connector) will result in green tally (preview) being set on the SDI output.



If you want tally control of camera IDs other than 1-8 or if you want just red tally for camera 1-16 for instance, you simply configure the inputs in the web interface (see picture).



The SDI input should be connected to your source for the camera return feed. This would typically be a program output and possibly enriched with CCU data via either an ATEM switcher, the SKAARHOJ RCP, ATEM CCU console or the Blackmagic Arduino Shield. The SDI Tally box passes through all CCU information and only overrides Tally information.



Camera Support

The Blackmagic 3G-SDI Arduino Shield supports the following formats: 720p50, 720p59.94, 720p60, 1080i50, 1080i59.94, 1080i60, 1080p23.98, 1080p24, 1080p25, 1080p29.97, 1080p30, 1080p50, 1080p59.94 and 1080p60, but the camera doesn´t have to be running the same video format as the program input, so you can use cameras in Ultra HD while the camera protocol is sent over HD signal to the camera.


Supported Hardware Devices

Check out the UniSketch page to see which types of hardware devices supported in the SDI-GPI Link.


Connection Diagram principle sketch for setup with the SDI-GPI Link Principle sketch for setup with the SDI-GPI Link



Image Gallery have a look

SDI-GPI Link Features




  • 1 x DB25 Connector

  • 16 Digital inputs

  • Blackmagic 3G-SDI Arduino Shield

  • UniSketch OS


Physical Specifications




  • Enclosure Size 12.7 x 8 x 4.9 cm

  • Weight 0.315 kg


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