LA Audio GCX20 - Manual (Page 10)

Page 10
The led still indicates Gate open-Gate closed but is dimmed when
BYPASS is 'in'.
Range on the GCX20 is fixed at -80dB so gated signals are effectively
muted.
LINK
switch
In LINK mode Channel 1 becomes the MASTER controller for both
channels. The controls, switches and leds associated with Channel 2 are
in-operative in this mode.
The GCX20 combines the signals from both channels so that the input to
either channel (exceeding Threshold) triggers the gate.
4.2 COMPRESSOR SECTION
THRESHOLD
control
This control sets the signal level above which compression starts. The
Threshold range is -30dBu (CCW) to +20dBu (CW).
RATIO
control
Ratio defines the amount of compression applied to the input signal once it
has exceeded the Threshold level. A Ratio setting of 2:1, for example
means that for every 2dB that the input exceeds the Threshold, the output
will increase by 1dB. The following graph shows the relationship between
input and output levels for various Ratios -
INPUT
OUTPUT 1:1
2:1
4:1
10:1
20:1
THRESHOLD
0dB
0dB