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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