Behringer ABACUS Quick Start Guide - Page 7

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Quick Start Guide

ABACUS

ABACUS Controls

(12)

CHANNEL 2 ATTENUVERTER

–

Use this control to attenuate

(CW) or invert (CCW) voltages

fed to Channel 2 input on socket

3 or the internally generated

voltage in the range -10 V to

+ 10 V.

(13)


–


(CW) or invert (CCW) voltages

fed to Channel 3 input on socket

4 or the internally generated

voltage in the range -5 V to

+ 6 V.

(14)

CHANNEL 4 BOTH CV INPUT

–

Accepts a voltage in the range

+/- 8 V. A positive voltage will

exponentially decrease the

total Rise/Fall time, until the

minimum is reached; a negative

voltage exponentially increases

it until it reaches maximum.

(15)

CHANNEL 1 FALL CV INPUT

–

Allows CV control of the Fall

function, in conjunction with

control 16. Accepts voltages

in the range +/- 8 V. Positive

voltages increase the Fall time

until the maximum is achieved;

negative voltages decrease it

until it reaches minimum.

(16)

CHANNEL 1 FALL TIME

–

Use this control to set the

Fall time. See table below for

maximum times according

to different settings. Can be

modulated further by feeding

a CV to socket 15.

(17)

CHANNEL 4 FALL TIME

–

Use this control to set the

Fall time. See table below for

maximum times according

to different settings. Can be

modulated further by feeding

a CV to socket 18.

(18)

CHANNEL 4 FALL CV INPUT

–

Allows CV control of the Fall

function, in conjunction with

control 16. Accepts voltages

in the range +/- 8 V. Positive

voltages increase the Fall time

until the maximum is achieved;

negative voltages decrease it

until it reaches minimum.

(19)

CHANNEL 1 CYCLE TRIGGER

–

Allows an external positive

going gate or trigger of +2.5 V

or more to trigger Channel 1’s

Cycle function.

(20)


–


(CW) or invert (CCW) the

output of Channel 1 after

Rise/Fall processing. Does not

pass internal voltage unless

processing is taking place.

(21)


–


(CW) or invert (CCW) the

output of Channel 1 after

Rise/Fall processing. Does not

pass internal voltage unless

processing is taking place.

(22)

CHANNEL 4 CYCLE TRIGGER

–

Allows an external positive

going gate or trigger of +2.5 V

or more to trigger Channel 4’s

Cycle function.

(23)

CHANNEL 1 RESPONSE

–

Use this control to vary the

response of Channel 1 from

logarithmic through linear to

exponential. See table below.

(24)

CHANNEL 4 RESPONSE

–

Use this control to vary the

response of Channel 4 from

logarithmic through linear

to exponential. See table below.

(25)

CHANNEL 1 CYCLE

– Use this

button to initiate cycling of

Channel 1; Rise and Fall will

cycle until button is pressed

again to stop the cycle. Button

is illuminated when cycling.

Button flashes when Cycle is

externally triggered via socket

19. Internal Cycle takes priority

over external trigger.

(26)

CHANNEL 1 OUTPUT

–

Outputs the processed voltage

from Channel 1

.

(27)

CHANNEL 2 OUTPUT

–


from Channel 2.

(28)

CHANNEL 3 OUTPUT

–


from Channel 3.

(29)

CHANNEL 4 OUTPUT

–


from Channel 4.

(30)

CHANNEL 4 CYCLE

– Use this

button to initiate cycling of

Channel 4; Rise and Fall will

cycle until button is pressed

again to stop the cycle.

Button is illuminated when

cycling. Button flashes when

Cycle is externally triggered via

socket 22. Internal cycle takes

priority over external trigger.

(31)

CHANNEL 1 END OF

RISE OUTPUT

– Outputs a

+ 9 V voltage at the top of the

Rise function, indicated by the

associated LED, which continues

active until the end of the

Fall cycle.

(32)

CHANNEL 1 UNITY OUTPUT

–

Outputs a 0 - +10 V voltage

following the Rise/Fall

functions when Channel 1 is

cycling; otherwise follows the

channel input unaffected by the

attenuverter. LED shows green

for a positive voltage, red for a

negative one.

Behringer ABACUS Quick Start Guide - Page 7

Channel 4 Fall Cv Input

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