Support (#5) - doublefil bug? (#4) - Message List

Hello, I just encountered a strange thing using doublefil: When I type

|sh> create spike 0.05 40 1 20

|sh> create spike 0.05 60 1 20

|sh> doublefil bp_0.01_0.11_4

The amplitude of the first trace (length=40s) is significantly smaller (approx. 10 times) than the amplitude of the second trace.

bp_0.01_0.11_4 was created as follows:

|sh> makef

filter type: bp

FFT (f) or recursive (r) filter: f

input type (f=Hz,t=sec,w=ang.freq.): f

corner 1: freq/time: 0.1

corner 2: freq/time: 0.11

order of filter: 4

name of output file (no extension): bp_0.1_0.11_4

command /home/hase/shpackage/sh/util/butfreq bp f 0.1 0.11 -o=4 -f=BP_0.1_0.11_4

Is there anything I missed concerning signal processing or is there a problem in SH? Thanks, a lot, Katrin