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DUAL/STEREO COMPRESSOR/NOISE GATE CN-220
The side test switch, allow monitor the output signal obtained after the key filters to
set up by ear the signal that we want to open the noise gate. It is a push button,
because of that upon releasing it, the noise gate will return to its normal state.
This switch will be used only during the sound check since it disables the compressor and
noise gate effect.
NOTE:
The SIDE TEST switch, connect directly the key filters output with the unit output. Therefore,
disable the compressor section, and the noise gate BYPASS switch.
STEREO:
In stereo mode at the channel 2, this switch monitor the output signal obtained after
the channel 2 key filters, but the noise gate trigger with the signal obtained of the channel 1 and
channel 2 key filters average.
ACTIVITY LED’s (SHUT — OPEN)
The activity LED’s show the noise gate operation. The SHUT red LED indicate that
the key filters signal level output, which trigger the noise gate, is bellow the threshold set
up. The other OPEN green LED report that the key filters signal level output, which trigger the
noise gate, is above the threshold set up.
If the BYPASS switch is not depressed, when the SHUT red LED light, the noise gate will be
decreasing the input signal gain, and when the OPEN green LED light, the signal will pass
unchanged through the noise gate.
STEREO:
In stereo mode, the channel 2 activity LED’s, won’t indicate the channel 2 noise gate
operation. The channel 1 activity LED’s will indicate the operation of both noise gates.
HP AND LP KEY FILTER CONTROLS
The lateral filters, filter the signal that will arrive to the noise gate
detector, allowing to trigger the noise gate only with the desired instrument,
or with the wanted bandwidth, avoiding false gating.
The high pass filter (HP) can vary between 30 Hz to 4 KHz, and the low
pass filter can vary between 200 Hz and 20 KHz, allowing an adjustment in all the audible
band
STEREO:
Like starting point, it is convenient adjust both filters of both channels (channel 1 and 2)
with the same settings since the control on both channels is obtained by the two signals trigger
average.
THRESHOLD CONTROL
The threshold control allows set up the level above the signal will pass
unchanged through the noise gate. If the level is bellow this threshold, the noise
gate will be decreasing the input signal gain.
The threshold control can vary between —50 and +20 dBu.
ATTACK TIME SWITCH
The noise gate attack time is defined, as the delay in the noise gate opening (allow
to pass the signal unchanged) when a signal rise above the threshold level set up.
With the ATTACK switch depressed, the noise gate attack time will be configured in
AUTO mode. In this mode, the noise gate detector adapts the attack time to the input program
content, allowing an easy and quick noise gate adjustment on the part of the user.
