Due to the difficulty to engage the SSFS I tried to reduce the attenuation on the IMC locking loop (from 31 dB to 29dB) and it worked we could switched on the SSFS and were able to go on with the ITF locking.
Due to the difficulty to engage the SSFS I tried to reduce the attenuation on the IMC locking loop (from 31 dB to 29dB) and it worked we could switched on the SSFS and were able to go on with the ITF locking.