A few of today's unlocks, after the wind settled down, have been caused by low gain oscillation for PR_TX (Fig.1).

Increasing the gain in CARM_NULL_1F caused an unlock soon after the transition, so we introduced a gain change in ACQUIRE_LOW_NOISE_1 (line 5232 and 5275 in ITF_LOCK.py).

The modifications can easily be reverted or made transparent (by simply setting this gain to the same value in CARM_NULL_1F and LOW_NOISE_1) if need be.