All NewTek products currently only support 3G SDI Level A signals. If a connected source is not appearing, ensure it is not 3G SDI Level B. Further information about SMPTE 424M standards can be found on various online sources.
This applies to current models as well including:
TriCaster 2 Elite
NewTek NC1 I/O
TriCaster 410 Plus
Current as of 9/06/2020