MMWAVEICBOOST: Clear steps (please) for implementing Hardware Trigger through sync_in trigger signal in pin 9 of J5 in Mmwaveicboost (Documentation if available)

Hi all

I am trying to implement hardware trigger on the MMWAVEICBOOST.

I am supplying a 3.3V pulse into pin9 on the J5 connector (SYNC_IN). I have followed the advice on setting pulse width less than 1us but greater than or equal to 25ns. I have also followed the suggestion of sync_in pulse periodicity >= frame trigger delay + frame periodicity.

However, for some reason, I still cannot trigger frames reliably in Mmwave Studio. Sometimes the DCA1000EVM just doesn't capture any data at all, even after pressing DCA1000 ARM and Trigger Frame in Mmwave Studio.

Is the sync_in signal voltage okay at 3.3V or should it be 5v? Any other help would be appreciated!

Thank you.