14
100
10
1
%
dB
Hz
Do
uble
in
te
gr
ati
on
Sin
gle
in
teg
rat
ion
Modulation limits
Max.
modulation
0.1
1
10
100
1000
20
0
-20
-40
Fig. 8: Frequency response of the integrators
180°
-180°
0
90°
-90°
0.1
1
10
100
1000
Fig. 9: Phase response of the integrators
Overload at
Integrator
Input
In some cases signal components with high frequency
and magnitude may overload the amplifier although no
overload can be detected at the M68 output. The over-
load LED remains dark. This can occur due to the at-
tenuation of higher frequencies by the integrator
(compare Fig. 8). To avoid possible overload, make
sure to check the signal level in the switch position
„ACC“ (integrator off) before using the integrator. If an
overload condition should be indicated, reduce high
frequency components by an appropriate low pass
frequency.
