Intellijel Quad User manual

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Quad Inverter Manual
Quad Inverter
Quad CV Inverter / Audio Buffer
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Manual Revision: 2018.05.16 
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Quad Inverter Manual
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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
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.
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.
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Quad Inverter Manual
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Most modules will come with the cable already connected but it’s a good idea to double check
the orientation before proceeding. 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 words “-12V” and a thick white
stripe.
If you are using another manufacturer’s power
supply, check their documentation for
instructions.
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Once connected, the cabling between
a module and power supply should
resemble the photo shown to the right.
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.
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Quad Inverter Manual
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Operation
Intellijel’s Quad Inverter contains four voltage inverters [A - D] — each with an
input jack [1] on top and an output jack [2] beneath it. Each output is a buffered
inversion of the input signal. For example, if you send +3V DC to the input jack,
the inverted output will be -3V DC.
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Similarly, if you send a waveform to an input, the output will be an inverted copy
of that waveform. This is particularly useful when you want a control voltage
(such as an LFO or envelope) to inversely impact the parameter it’s modulating.
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The output of each inverter is normalled to the inverter immediately below it. So if
you patch a signal into Inverter A and patch nothing into InverterB, then the
signal is passed through from the output of A to the input of B, where it’s inverted
(again), making it identical to the signal appearing at the input of InverterA.
Similarly, if you also leave the InverterC input open, then the input to InverterA
is inverted a third time, making the output of InverterC identical to the output of
InverterA.
NOTE: Quad Inverter does not function as a stand-alone gate inverter (since
inverting a gate is not actually the same thing as inverting a voltage). For this you
need a logic inverter, such as the Intellijel Plog. You may, however, feed an output
from a Quad Inverter into a Triatt or Quadratt to offset the voltage such that gate
inversion occurs. 
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Quad Inverter Manual
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Technical Specifications
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Width
2 hp
Maximum Depth
29 mm
Current Draw
4 mA @ +12V
17 mA @ -12V
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