Intellijel MMOD II Manuel utilisateur

µMOD II Manual

µMOD II

Ring Modulator / Analog Logic

Manual Revision: 1.0

µMOD II Manual

Table of Contents

Table of Contents

Overview

Installation

Before Your Start

Installing Your Module

Front Panel

Controls

Inputs & Outputs

Analog Logic

Technical Specifications

Page 1

µMOD II Manual

Overview

The µMod II is a multi-function module designed for combining audio or CV signals in a variety

of ways. Apart from a versatile ring modulator / four quadrant multiplier it also performs analog

logic functions useful for generating new combinations of waveforms.

The principle of operation is to take two signals, called X and Y, and produce a series of output

signals that are derived from the sources using a variety of analog methods.

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Page 2

µMOD II Manual

Installation

Intellijel Eurorack modules are designed to be used with a Eurorack-compatible case and power

supply.

Before Your Start

Before installing a new module in your case you must ensure your case’s power supply has

sufficient available capacity to power the module:

● Sum up the specified +12V current draw for all modules, including the new one. Do the

same for the -12 V and +5V current draw. The current draw will be specified in the

manufacturer's technical specifications for each module.

● Compare each of the sums to specifications for your case’s power supply.

● Only proceed with installation if none of the values exceeds the power supply’s

specifications. Otherwise you must remove modules to free up capacity or upgrade your

power supply.

You will also need to ensure you have enough free space (hp) as well as free power headers in

your case to fit the new module.

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

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.

Ensure the 10-pin connector on the power cable is connected correctly to the module before

proceeding. The red stripe on the cable must line up with the -12V pins on the module’s power

connector. The pins are indicated with the label -12V, a white stripe next to the connector, the

words “red stripe”, or some combination of those indicators.

Page 3

µMOD II Manual

Most modules will come with the cable already connected but it is good to double check the

orientation. Be aware that some modules may have headers that serve other purposes so

ensure the cable is connected to the right one.

The other end of the cable, with a 16-pin connector, connects to the power bus board of your

Eurorack case. Ensure the red stripe on the cable lines up with the -12V pins on the bus board.

On Intellijel power supplies the pins are labelled with the label “-12V” and a thick white stripe:

Page 4

µMOD II Manual

If you are using another manufacturer’s power supply, check their documentation for

instructions.

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.

After you have confirmed all the connections, you can reconnect the power cable and turn on

your modular system. You should immediately check that all your modules have powered on

and are functioning correctly. If you notice any anomalies, turn your system off right away and

check your cabling again for mistakes.

Page 5

µMOD II Manual

Front Panel

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Controls

1. QUADRANT - The quadrant knob controls shifts the multiplication in to the positive or

negative quadrants. For standard ring modulation, set the knob at the 12 o’clock

position.

Page 6

µMOD II Manual

2. X +/- - This three position switch controls the rectification of the X input. When in the

middle position the input waveform is unaltered. When at + only the positive half of the

waveform is passed through. When at – only the negative half is passed through.

3. Y +/- - This switch functions the same as the X +/- but for the Y channel.

4. X Attenuator - This knob controls the attenuation of the X signal. It is unaltered when

the knob is fully clockwise.

5. Y Attenuator - This knob functions the same as the X attenuator but for the Y channel.

Inputs & Outputs

A. X - X signal input.

B. Y - Y signal input.

C. RING - Ring modulator output.

D. SUM - This output is the result of adding the X and Y inputs, X + Y.

E. DIFF - This output is the result of subtracting the X input from the Y input, Y – X.

F. MAX - This output is the maximum of the X and Y signals at any given point in time. It’s

the analog equivalent of the digital OR operation.

G. MIN - This output is the minimum of the X and Y signals at any given point in time. It’s

the analog equivalent of the digital AND operation.

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Page 7

µMOD II Manual

Analog Logic

The analog logic section of the module produces waveforms that are a combination of the X and

Y inputs. This is well suited to creating complex CV from basic waveforms, or creating new

interesting forms of audio.

The diagram below illustrates what’s possible by combining sine and saw waveforms of two

different frequencies via the various logic outputs:

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Page 8

µMOD II Manual

Technical Specifications

Width

6 hp

Maximum Depth

35 mm

Current Draw

41 mA @ +12V

41 mA @ -12V

Page 9

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