Chippmann Omega-PhiCS-8 Series, Руководство пользователя

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CS-8 Series Omega-Phi Rev1.04, Oct. 2015
-22-
FM result
(not Thru zero)
(Half-wave)-Rectifier
(Index=2)
-1
1
1
2
3
Fig. 5c FM with Index=2 and half-wave rectifying
This is the mode of every typical oscillator. When the input voltage at the U
Lin
-
input becomes zero or lower, nothing more will happen; the oscillator stops.
And it's also evident that the result is not periodic.
Rect -switch: This switch determines the mode of the rectifier. In position "Full"
it works as shown in Fig. 5b and in position "Half" as in Fig. 5c.
8.4.1. The FM VCA
Fig. 3a above shows, that the rectifier is fed with the bias and a further external
modulation input signal. This modulation signal will be applied at the
FM -jack: It channels the input unabated to an VCA-input. These input voltages
shouldn't exceed 10 V, if linear working of the VCA is wished, best is 5 V.
Index/Depth -controller: The
Depth
-controller attenuates the modulation
signal at jack 2 (Envelope symbol) between 0 and 1. This signal will be added
to the value of the
Index
-controller. In case that nothing is applied at
Depth
or
it's in full CCW position in the first instance
Index
, turning from the middle
position (no effect) to full CW, the modulation depth will increase. Turning it to
the left up to full CCW, nothing more will happen. At
Depth positive as
negative voltages could be applied, which either increases or decreases the
index value. By turning the
Index
-controller to the left high (positive)
modulation voltages at the
Depth
-controller can be cut.
Coupling -switch: This switch selects the kind of coupling the VCA-FM-input to
the rectifier. In position "AC" (capacitive decoupled) only alternating voltages
with frequencies higher than 8 Hz will be processed. This kind of coupling