Tue, 08 Jan 2002 15:39:35 +0100 wenzelm tuned;
Tue, 08 Jan 2002 12:47:58 +0100 nipkow added filter_filter
(0) -10000 -3000 -1000 -300 -100 -30 -10 -2 +2 +10 +30 +100 +300 +1000 +3000 +10000 +30000 tip