A feed forward for the 150 Hz line subtraction has been tested (the same signal and the same technique in use for the 50 Hz line). A factor of 10 reduction has been achieved, but there is also some noise injected around the central frequency.

A second attempt has been performed, using MC_Z_CORR (frequency noise) instead of ENV_CEB_UPS. The forwarded correction is much cleaner in the second case, and the result is promising, but unfortunately there was no time to find a good setting for the control of FF parameters. For this reason, the 150 Hz FF is left off.