I just built the KDSP2 and found that the SSB Low Pass filter setting on filter 1 does not work as expected. The noise bandwidth is reduced instead of being wide. I have set the high frequency cutoff to 2.5 KHz for now. Any settings above 2.5 KHz also do not appear to function properly. Is there a known solution to this problem ? 73, Bob Johansen WB2SRF