Today the ITF unlocked every time the SSFS boost was activated, except for one trial. Around the gps 1221332726 the ITF survived to the boost activation (fig. 1), then it unlocked after a few seconds due to different reasons; in the meanwhile, SSFS was behaving normally. Maybe some good adjustment was performed in that trial, but there is the possibility that the lock survived by chance. Locking at the error signal, one can notice that it was exactly crossing zero when the boost was activated (fig. 2). The activation of the boost on MC side happened when the error signal was already stabilized around zero (fig. 3).

Going back to the old successful lock acquisitions, one can see that the last one had the same lucky characteristic (fig 4). The previous ones look to me quite different in the way of activating the boost: sometimes I see a much longer ramp in the switch, sometimes the ramp is short but it seems that on SSFS side the boost is engaged well before the switch changes value.

Hopefully the magic adjustment will be applied again and the problem will disappear. If not, there is the possibility that the problem comes from the ramp.