Ashly nX Series Operating Manual page 24

Operating Manual - nX, nXe, and nXp 150W/75W Power Amplifiers
Pluggable DSP Block Descriptions
1) Dynamics Controls
Limiter
The limiter is a compressor with a fixed infinite ratio. Use
a limiter to absolutely prevent signal from exceeding a designated
peak level. The limiter function allows for threshold, attack time and
release time adjustments. It also offers link group assignment for link-
ing to another channel's limiter, so that action on one channel affects
all linked channels. For a more natural sounding gain reduction that
allows some signal above threshold, use the compressor function.
Parameters:
Threshold - The signal level at which the limiter begins to
apply gain reduction to the signal. Threshold range is -20dBu to +20dBu.
Ratio - The amount of gain reduction applied to signal above
threshold. Fixed at infinite, there is no signal increase above threshold.
Attack Time - The rate in mS/dB that gain reduction occurs
after the signal level crosses threshold.
Release Time - The rate in mS/dB that any gain reduction
stops after the signal level drops below threshold.
Link Group - Group to which all parameters are assigned,
for simultaneous adjustment to multiple limiters
Show Meter On Graph Checkbox - Overlays the input/output level meters on the limiter graphical display.
Detector Type - Fixed at peak detect for the limiter.
Compressor
The compressor function allows for user-adjustable thresh-
old, ratio, attack time, release time and detector type. The compressor
also offers link group assignment for linking to another channel's
compressor, so that action on one channel affects all linked channels.
An attenuation bus assignment is provided to allow multiple limiters
to force their gain reductions to track each other, ie for stereo signals.
For peak limiting with infinite ratio, use the limiter function.
Parameters:
Threshold - The signal level at which the compressor begins to
apply gain reduction to the signal. Threshold range is -20dBu to +20dBu.
Ratio - The amount of gain reduction applied to signal level
above threshold. Range is 1.2:1 to infinite.
Attack Time - The rate in mS/dB that gain reduction occurs
after the signal level crosses threshold.
Release Time - The rate in mS/dB that any gain reduction
stops after the signal level drops below threshold.
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