DPW Design AV2 Manual

DPW Design Ikke kategoriseret AV2

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Side 1/4
AV2
Attenuverter
The base-function of the AV2 is a dual attenuverter. To the two attenuverters a mixer with an
attenuverter on the output and a comparator is connected.
The combination of simple functions makes this a very useful module to have in your toolbox.
The unit can be used as a utility module for control voltages or to run audio through. It is DC
coupled.
Input A and B
When nothing is connected to A or B the input of the attenuverter is
normalled to +5V.
This gives the possibility to set the output from -5V to +5V DC out via the
knob.
When something is connected to A or B that signal can be attenuated or inverted and attenuated
via the knob. In the middle position the output is zero. Max clockwise you get 1 times amplification
through the module and any signal passes through unaffected. Max counter clockwise the
amplification is -1 times. That is 180 degrees out of phase with the input.
The LEDs shows the output voltage. Green is positive and red is negative voltage.
SUM
SUM is the sum of A and B after their attenuverters.
The knob on SUM is an attenuverter as on A and B.
The LED shows the output voltage. Green is positive and red is negative voltage.
DPW Design, Häradsvägen 200, 14171 Segeltorp, Sweden
www.dpw.se MAN-AV2 Rev B
A>B
A>B is a comparator that is comparing A and B after the attenuverters.
If A is more positive than B the output A>B will go high. If B is the highest the output will go low.
The output is -5V to +5V and has a volume control.
The output can be used as a logical control signal or as a squarewave audio output that can be
PWM modulated depending on A and B.
The LED shows the output voltage. Green is positive and red is negative voltage.
The LED shows the level before the output volume control so you can see how the comparator is
reacting before turning up the volume out.
Device specs
Module size: 5 hp wide, 30 mm deep with power cable connected.
Input impedance: 50 kohm
Output impedance: 1 kohm
Bandwidth: More than 300 kHz.
Power requirements: +/-12V. Max power consumption 45 mA
Connect the power cable with the red stripe down towards the -12V marking.
The unit is protected for reverse power.
Use case examples
A few examples of use cases more than just as dual attenuverter, a 2 channel mixer och a
comparator. Something to get your imagination going.
Bipolar to unipolar
A normal LFO has an output of +/-5V, that is 10V peak to peak. If you have a module
that requires a unipolar signal in you can do that with the AV2. The peak to peak
needs to be reduced to 5V and the signal needs to be moved to be just possitive
voltages.
Connect your LFO to A and set the potentiometer to halfway between the zero and
max clockwise as shown in the picture. You have now set the voltage to half of
whats in on A.
Don't connect anything on B and set the potentiometer to the same possition as A.
This gives a 2,5V DC voltage out on B.
Turn SUM max clockwise and use SUM as your output. Here is your unipolar signal.
If you look at the SUM LED. It shall only be green. If it flashes red when the FLO signal is low, just
turn B up a little more to move the signal more away from the negaive side.
PWM modulation
Connect a sine or triangle audio signal to A. Set the A knob to max clockwise position.
Connect a sine or trangle LFO to B. Set the amount of PWM with the B knob.
A>B is the audio out in this case.
If you want an extra fat and wide PWM stereo sound you can use two AV2 modules connected to
the same sources and set the controls of the two a bit different.
DPW Design, Häradsvägen 200, 14171 Segeltorp, Sweden
www.dpw.se MAN-AV2 Rev B

Produkt Specifikationer

Mærke: DPW Design
Kategori: Ikke kategoriseret
Model: AV2

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