Plot 1 shows the ASC coherence during an imperfect A2L strech this morning. this resulted in a power-law increase in DARM below 60Hz.

We designed slightly more agressive cut-off filters for DHARD_P, CHARD_P and CHAD_Y. They , take the ASC signal below other noise above ~35Hz, even if the A2L tuning runs away a bit.

Plot 2 shows the the new (sold) and old (dashed) drive levels of the ASC.

The new filters were integrated with the ELP10 filters for DHARD_P and CHARD_P (FM4 and FM2 respectively). For CHARD_Y I copied the cut-off filter from FM9 to FM3 before modifying it in FM3. This preserves the old 40W cut-off filter. I switched Guardian over to use FM3. The new filter uses less than 7deg extra phase at the UGF. The last 50W transfer function measurment suggest that we have about 60deg at the UGF, so the filter should also work at 50W.

The ISC guardian was again checked into SVN after the modification.