The board appears to be an oscillator, injecting a 60Hz signal into the frequency detection cct.
It's a peripheral cct. meaning that as long as the software recieves a signal from the cct, it's happy.
It will be interesting to see how Stern is going to get around this, as any detection cct. can be circumnavigated eventually, even to the point of locating the signal on the MPU board.
