Not receiving all fMRI triggers

We recently purchase a Cedrus Lumina 3G controller to run an fMRI experiment. However when we run the experiment the controller is only receiving every second fMRI trigger. The controller is connected to a Semens 3T scanner through the Siemens fMRI trigger converter Any advice On how to rectify this would be appreciated.

Hello Alfred, what version of the firmware does your Lumina controller have? you can download and use our Xidon software to find out.

Firmware version 2.2.8

Version 2.2.9 is the one that fixes the issue with triggers. Please see the webpage Updating the Lumina Controller’s Firmware.