Ecler SAM614 Manual De Instrucciones página 8

For adjusting one channel's input sensibility we recommend you to consider following
guideline: Position the volume potentiometer to position 10 while all other channels are at 0. Start the
sound source at its maximum level and adjust so that the 0dB LED of the output level indicator (OUT
A / B section) sporadically flashes. The +6dB LED should never light up.
Repeat this process with all channels where sound sources will be connected. Make sure
that when all channels are mixed together, the +6dB LED is not permanently lit, but instead
sporadically flashes. Should the former happen, repeat the entire operation attenuating more each
channel.
6.3. Channel indicators
Besides the A / B output assign indicators (see section 5.1), the SAM614 has two useful
indicators on each of its channels.
The SP Signal Presence indicator (5) shows that signal is effectively present on the
channel input.
The CLIP indicator (6) warns that the channel is almost saturated. As a rule of thumb this
indicator should never stay lit permanently.
6.4. Equalization
Tone controls (9-11-13) provide a gain/attenuation of ±15dB for each of the three bands,
which are centered at 100Hz, 2kHz and 10kHz. Because of the intended applications of this unit, it has
a tone control system that needs a screwdriver to be used in order to perform the adjust, thus avoiding
any error during the normal use procedure.
6.5. Level indicators
These indicators (14) monitorize the signal level present on each output bus, before the
final volume control.
6.6. Audio monitoring
The signal present on the output buses A or B can be monitored through the PHONES
output (17). The pushbutton (15) selects the desired bus.
6.7. Ground loops, background noise
You should always make sure that the signal sources coming to the unit, as well as all
devices connected to its outputs, do not have their grounds interconnected, that is; ground must never
come from two different devices. Should this ever happen, noises could occur and seriously interfere
the sound quality.
Cable shielding, when connected to the chassis, must never be interconnected, so as to
avoid ground loops.
The SAM614 mixer has been designed for the lowest possible background noise.
Independently from the electronic design itself, background noise level will directly depend on the right
installation and use of the mixing unit.
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