We recently got a Lumina 3G+ controller to use in an fMRI study, but we are having problems to receive the scanner triggers. The Lumina is connected to a 3T Siemens MRI scanner and to a MacBook Pro (macOS Big Sur, 11.5.1), and is set to Keyboard mode using ASCII (firmware 2.2.8). The problem is that sometimes the trigger is received and sometimes not. This seems completely random, and in any case the trigger light (on Lumina) never turns on. We tried a Lumina controller from other research group that has an older firmware (version 2.0) and this does not occur, i.e., every trigger is received and everything runs normally. Any idea on what might be happening?
Any feedback is appreciated.
Thanks in advance,