Schippmann CS-8-Serie Bedienungsanleitung Seite 39

CS-8 ol HDH6/VDL6 Rev1.04, Feb. 2015
6 db, 12 db, 18 db, 24/36 db A/B-output jacks: The jacks (15-22) provides
the different slopes at the filter stages 1, 2, 3, 4 and 6 (see Fig.3). The slope
switch (23)
selects for both filters VCF A and VCF B commonly the stage 4 (24
db/octave) or stage 6 (36 db/octave) for the output jacks 21 (VCF A) and 22
(VCF B). Fig. 5 illustrates for the HDH6/VDL6 different slopes.
level [dB] level [dB]
cutoff-frequency
cutoff-frequency
HDH6 VDL6
6 12 18 36 36 18 12 6
slope [db/octave]
slope [db/octave]
signal frequency signal frequency
Fig. 5 HDH6/VDL6 slopes
Note: Subtracting of an output with a higher slope from one with a lower
slope, regardless whether within the same filter A or B (intra) or between two
filters (inter) (e.g. 6 db (A) minus 12 db (B)) will result into band-passes. With
the inter-variant the band with can be adjusted by the two cutoff-frequencies,
additionally.
Restriction: With these subtractions for the HDH6 the new won low-pass slope
is always 6 db/oct., whereas the high-pass slope will have the slope of the
higher slope output (e.g. 6 db - 18 db = band-pass 18/6 db/oct.). With the
VDL6 the relationships turns around (e.g. 6 db - 18 db = band-pass 6/18
db/oct.)
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