44
9-2 LOW-PASS FILTER CHARACTERISTIC
Section 9-2-1 shows the characteristic of the low-pass filter incorporated in the DPM-900/950 series. In
section 9-2-1, the frequency characteristic is normalized against a cutoff frequency. About the relation
between the amplitude and the phase, first obtain the ration of F/Fc, and then read it from the diagram
below.
In addition, frequency-response characteristic when cutoff frequency of the DPM-911/912/913 or
DPM-951/952 is set to FLAT is shown in the section 9-2-2 and 9-2-3.
9-2-1 Low-pass Filter Characteristic
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
10
20
-20
-18
-16
-14
-12
-10
-8
-6
-4
-2
0
2
4
0.001
0.01
0.1
1
10
遅れ
位
相[
de
g]
振幅
[d
B
]
周波数[F/Fc]
[F/Fc] F: Signal Frequency
Fc: Cutoff Frequency
A
m
pl
it
ude
[
dB
]
D
el
aye
d P
ha
se
[
de
g]
Amplitude
Phase
