Further Considerations; Ground Loops; Audio Connections; Background Noise - Ecler NUO2 Manuel Utilisateur

Both standard and "eternal" potentiometers share the same type of connection. To install the "eternal" crossfader,
please follow these steps.
5.2.8. Replaceable VCA Faders and Crossfaders / "eternal" upgrade
Once any of these components has reached the end of its operating life, it can be easily replaced following these
simple steps:
1. Remove the buttons and the four screws on the bottom panel.
2. Remove the two screws that hold the potentiometer to be replaced, and take it out of the mixer.
3. Disconnect the multipin connector.
4. Replace the part with an identical one or with the "eternal" crossfader.
5. Connect the multipin connector.
6. Place the fader back in the mixer and secure it with the two screws.
7. Secure the bottom cover plate with its screws and insert the buttons back in.
Always use original ECLER replacement parts.
5.2.9. MASTER Levels
The NUO3 features two main output level controls MASTER 1 (23) and MASTER 2 (22). The OUT 1 (36-37) level
is controlled by the MASTER 1 level knob. The OUT 2 (38) level is controlled by the MASTER 2 level knob.
MASTER 1 and MASTER 2 are affected by the corresponding BAL (25-24) balance control knobs.

6. FURTHER CONSIDERATIONS

6.1. Ground loops

Ensure at all times that no signal sources reaching the mixing desk and no devices connected to its output have
their earths interconnected; that is, earth should never reach them via two or more different paths, as this could
lead to humming which could even interfere with sound reproduction quality. In order to avoid earth loops, ensure
that the shielding of cables, if connected to the chassis, are never connected with each other.

6.2. Audio connections

As a general rule of thumb, make the signal connections as short as possible and use the best connectors and
cable available. Cables and connectors are frequently held cheap, forgetting that a bad connection can result in a
poor sound quality.

6.3. Background noise

The use of active circuitry can yield, depending on the configuration, to a significant noise level. The NUO3 has
been designed for the minimum possible noise. Anyway, the noise level will always depend on the correct use and
installation of the mixer. It is not the same setting up the FADER at "2" and the MASTER at "10" that the other way
round; FADER at "10" and MASTER at "2". In the first case you get a poor signal to noise ratio that will be fully
amplified by the master while on the second we have a good signal to noise ratio only amplified by "2". As a result,
the background noise is greater in the first case than in the second one.
6.4. Cleaning
The front panel should not be cleaned with dissolvent or abrasive substances because silk-printing could be
damaged. To clean it, use a soft cloth slightly wet with water and neutral liquid soap; dry it with a clean cloth. Be
careful that water never gets into the unit through the holes of the front panel.
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