EN
- 4 -
CONTROLS AND FUNCTIONS
FRONT PANEL
1.-
INPUT LEVEL
: gain control of the input signal.
2.-
PROCESS ON-OFF
: switch to activate or deactivate audio signal processing in order to suppress
feedback.
3.-
OUTPUT LEVEL
: gain control of the output level.
4.-
MIC IN-LINE IN
: input, line or microphone signal level selector.
5.-
PHANTOM
: 48 V phantom power supply selector for condenser microphones.
6.-
L, R
: LED input signal level indicators. To have a suitable signal/noise ratio and to optimize the
processing and detection of sound feedback, regulate the input gain control so that the input signal
level is approximately -6 dBu.
7.-
CLIP
: LED input signal distortion indicator. When the LED indicator lights up, it shows that processor
input is saturated. In this case, lower the input signal gain level.
8.-
MONO/STEREO
: mono or stereo mode selector. In mono mode feedback is detected in the left channel.
In stereo mode it is detected in both channels.
9.-
LOCK
: LED indicator of the filter parameter update mode.
HPF/LPF: button to choose parametric notch filter update mode.
Press once, the LED LOCK indicator will light up and activate the HPF mode (Hold Parametric Filters).
Once the last notch filter has been adjusted, the filter parameters are fixed and feedback detection is
stopped. In this case the ATTENUATION control has no effect.
Press the button again, the LED LOCK indicator will switch off and the UPF mode (Update parametric
filters) is activated. After the last notch filter being inserted detection continues and if necessary the
previously inserted filters are reused. In this case the ATTENUATION control has affects the filters.
10.-
SENSITIVITY
: feedback detection sensitivity can be adjusted with the sensitivity selector from the MIN
to the MAX position through 15 sensitivity levels.
In the RESET/STOP position all the notch filters are reset and feedback detection is stopped, at the
same time as the LED LOCK and ATTENUATION indicators start blinking.
11.-
ATTENUATION
: notch filter attenuation update mode LED indicator.
MPF/RPF: button to choose parametric notch filter attenuation update mode. Press it once, the LED
indicator will light up and activate the RPF (Release Parametric Filter) mode. The system will
progressively reduce, and could even deactivate, the attenuation of the active notch filters if they are not
necessary. If new feedback is produced, the attenuation of the filters will increase again.
Pressing the button again, the LED ATTENUATION indicator will turn off and will activate the MPF
(Maintain Parametric Filter) mode. Therefore the filter attenuation stays fixed once adjusted.
12.- LED power indicator.
13.-
POWER
: on/off switch.
