forums.naturalpoint.com

I also had a similar issue when trying to convert timestamps in Motive. It felt like there was a clear gap between the time systems, and it took a long time to figure out how to convert correctly. If you can experiment with conversion tools or consult the community documentation, it might help.

You can obtain the ground (GND_IN) from the eSync2's common ground. Most electronic devices have a ground pin or pad that you can use. Check the eSync2 documentation for a designated ground pin.