- Posts: 2
- Joined: Fri May 17, 2019 3:37 pm
- Real Name: Bob Zeilstra
The Front and Rear (or Blackmagic calls this Main in the menu) SDI outputs are different. The Front SDI port is limited to 3G SDI output (up to 1080p60), while the Rear/Main SDI output is capable of outputting a 12G SDI signal (this suggests that they are likely using different SDI driver chips for each connector).
The Front and Rear/Main SDI connectors also have separate output format settings in the Monitor section of the menu (including the 3G SDI output level, which could be relevant if the NewTek Connect Spark only accepts one 3G SDI format level).
I'm not sure what resolution you are shooting at, but you should definitely check the SDI output settings of both the Front and Main SDI outputs to see if there are any differences. I would also try switching to different video resolutions, frame rates, and see if there is a difference in how the NewTek Connect Spark behaves with each signal format.