Quadratt 1U Quad attenuator, attenuverter, mixer and DC voltage source Manual (English) Revision: 2021.07.
TABLE OF CONTENTS COMPLIANCE 2 INSTALLATION 3 Before You Start 3 Installing Your Module 4 OVERVIEW 6 Usage Examples 6 FRONT PANEL 8 Controls 8 Inputs & Outputs 9 TECHNICAL SPECIFICATIONS 11 Quadratt 1U Manual 1
COMPLIANCE This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Changes or modifications not expressly approved by Intellijel Designs, Inc. could void the user’s authority to operate the equipment.
INSTALLATION This module is designed for use within an Intellijel-standard 1U row, such as contained within the Intellijel 4U and 7U Eurorack cases. Intellijel’s 1U specification is derived from the Eurorack mechanical specification set by Doepfer that is designed to support the use of lipped rails within industry standard rack heights. Before You Start Intellijel Eurorack modules are designed to be used with a Eurorack-compatible case and power supply.
You can use a tool like ModularGrid to assist in your planning. Failure to adequately power your modules may result in damage to your modules or power supply. If you are unsure, please contact us before proceeding. Installing Your Module When installing or removing a module from your case always turn off the power to the case and disconnect the power cable. Failure to do so may result in serious injury or equipment damage.
Once connected, the cabling between the module and power supply should resemble the picture below: Before reconnecting power and turning on your modular system, double check that the ribbon cable is fully seated on both ends and that all the pins are correctly aligned. If the pins are misaligned in any direction or the ribbon is backwards you can cause damage to your module, power supply, or other modules.
OVERVIEW Quadratt is a four channel active/buffered attenuverter and summing mixer. Each channel has a knob, which can function as a unipolar attenuator or a bipolar attenuverter, depending on the setting of its corresponding two-position switch. Each input is normalled to a precision +5V DC voltage source. With nothing plugged into the jacks, each knob controls a voltage range of 0 -to- +5V or -5V -to- +5V depending on the position of the mode switch.
into the bass frequencies. Do this by setting Channel A’s polarity switch to -/+, then turning the corresponding attenuator knob counterclockwise past 12:00. Because nothing is plugged into Quadratt’s OUT A, OUT B contains a sum of Channels A and B, giving you both the reduced note range and the lower frequencies you desire.
FRONT PANEL Controls [1] Channel A attenuator Attenuates the voltage level present at IN A. The behaviour of the knob depends on the position of the corresponding polarity switch. The attenuation amount is linear. [2] Channel A polarity switch This is a 2-position switch that sets the polarity of the OUT A signal. UNI: With the switch in the left UNI position, the channel functions as a standard attenuator.
[5] Channel C attenuator Behaves the same as the Channel A attenuator but for channel C. [6] Channel C polarity switch Behaves the same as the Channel A polarity switch but for channel C. [7] Channel D attenuator Behaves the same as the Channel A attenuator but for channel D. [8] Channel D polarity switch Behaves the same as the Channel A polarity switch but for channel D. Inputs & Outputs [A] IN A Input for channel A.
[C] IN C Input for channel C. With no cable plugged in, Quadratt sends 5V into Channel C, which you can attenuate (or invert) with the Channel C attenuator knob. [D] IN D Input for channel D. With no cable plugged in, Quadratt sends 5V into Channel D, which you can attenuate (or invert) with the Channel D attenuator knob. [E] OUT A Output for channel A, which is the attenuverted value of IN A. [F] OUT B Output for channel B, which is the attenuverted value of IN B.
TECHNICAL SPECIFICATIONS Width 28 hp Maximum Depth 25 mm Current Draw 24 mA @ +12V 23 mA @ -12V Quadratt 1U Manual 11
