We are still having the resonance issue of CC2. As we reported, we could lock CC2 wih bandwidth of kHz. However, sometimes if the resonance is excited by some random vibration. We have resonance at 3.2kHz. This limits our CC2 bandwidth. For example, sometimes we could only lock it with bandwidth of 400Hz(first picture shows this). The resonance is shown in the attached picture if we increase the gain.