Behringer ABACUS Quick Start Guide - Page 7
Channel 4 Fall Cv Input
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12 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) CHANNEL 3 ATTENUVERTER - Use this control to attenuate (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) CHANNEL 1 ATTENUVERTER - Use this control to attenuate (CW) or invert (CCW) the output of Channel 1 after Rise/Fall processing. Does not pass internal voltage unless processing is taking place. (21) CHANNEL 4 ATTENUVERTER - Use this control to attenuate Quick Start Guide 13 (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 - Outputs the processed voltage from Channel 2. (28) CHANNEL 3 OUTPUT - Outputs the processed voltage from Channel 3. (29) CHANNEL 4 OUTPUT - Outputs the processed voltage 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.