User manual

55 000 057 - B MIXY - User Manual 3
2. Functions
The functions of the mixer are shown on the functional diagram that can be found in
annex 5.1, “General block diagram ”
2.1. “Mic/Line”
Each of these three inputs is available on a 3-pin female XLR socket, and is
electronically balanced.
If no powering is active, unbalancing an input has no negative impact on the
performance.
Microphones can be powered in « phantom » mode or “Tonader 12V”, with
separate setting for each input. In phantom mode, 12V or 48V can be selected.
Inputs 2 and 3 can also be fed from the “EXT I/O” socket, in which case no
microphone powering is available.
Channel 2 features a +/-5 dB gain trimmer, for adjusting the balance in stereo mode
or the width in M/S mode.
Input 3 can stand very strong audio levels thanks to a 20 dB attenuator, directly
activated by a button on the front panel.
2.1.1. Functions of the “MIC/Line” inputs
The following functions are available on each input, via a selection in the menu :
x Input stage gain setting, 0dB to +50dB, 10dB steps;
x Phantom power for a microphone, 12V or 48V, or “Tonader 12V” ;
x High-pass filtering, 50 Hz cut-off frequency, 18dB/octave;
x High-pass filtering, 120 Hz, 18dB/octave;
x High-pass filtering, 300 Hz, 6dB/octave, suitable for compensating
proximity effects in directional microphones;
x Polarity inversion (phase reversal) ;
x Fast limiting, with “soft knee”;
x Routing to Left or Right bus, or Center (i.e. L and R), or not routed at all ;
The “risk of overload” LED begins to light at 12 dB below overhead. A limiter can
be inserted into each channel (post-fader). Its activation is shown by a green LED
that turns red when the signal begins to limit.