Ground Loops; Background Noise - Ecler DVA2-10c Bedienungsanleitung

4. CONSIDERATIONS

4.1. Ground loops

Ensure at all times that no signal sources reaching the device and no devices connected to
its inputs 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 the video reproduction
quality. In order to avoid earth loops, ensure that the shieldings of cables, if connected to the
chassis, are never connected with each other.

4.2. Background noise

The use of active circuitry can yield, depending on the configuration, to a significant noise
level. The SVA1-5c, DVA1-5c and DVA2-10c distribution amplifiers have been designed for the
minimum possible noise. Anyway, the noise level will always depend on the correct use and
installation of the unit.
4.3. Cleaning
The control panel must not be cleaned with any dissolvent, abrasive or petroleum
derivated substance else paint and silk-printing could be damaged.
Whenever cleaning should be necessary use a soft cloth slightly wet with water and
neutral liquid soap. Be careful that no liquid gets into the unit. Never use sharp or erosive objects to
scratch the control panel.
Should any liquid get into the unit, do not use any cleaning sprays; send the unit to the
nearest ECLER Technical Service.
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