Ashly nX Series Operating Manual page 26

Operating Manual - nX, nXe, and nXp 150W/75W Power Amplifiers
Autoleveler advanced parameters continued: (see image on previous page)
Threshold Below Target - Determines the relative input signal level above which the autoleveler increases gain, below
which no action is taken.
Ratio - This is the ratio of the input level change in dB to output level change in dB. It determines the degree of boost
or cut applied to a signal to maintain the target level. The higher the ratio, the closer the signal above threshold will approach
the target level. However, a higher level also increases how aggressive the autoleveler maintains that gain.
Gain Change Rate - Prevents sudden, choppy-sounding level changes to an input signal having a wide dynamic range.
Hold Time - This is the time after the input signal falls below the threshold during which the autoleveler's gain is held
constant before it returns to unity gain. Hold time is used in conjunction with gain change rate to arrive at a natural-sounding
auto leveler action.
Both the advanced and basic control views have a visible meter bar. It shows the gain or attenuation applied by the
auto leveler in 1 dB steps.
Ducker
The ducker is used to attenuate the level of selected channels when one or more
trigger channels has signal preset. This is typically used in paging applications where a
common input signal such as background music needs to be attenuated when signal is
applied to a specific channel (e.g., a paging microphone).
Parameters
Ducker Type - Available types are high and low priority trigger, filibuster, and
ducked program.
Trigger Threshold - The signal level on a trigger channel at which point all
ducked program channels are attenuated.
Ducking Release - This determines the time the ducked program stays attenuated
after the trigger input signal has fallen below its threshold.
Ducking Depth - Determines how much attenuation is applied to input channels
set for ducked mode.
Duck At Mixer(s) - Disables any attenuation being applied to the input and
enables the ability for each output channel's matrix mixer to apply the attenuation.
Ducker Types
High Priority Trigger - When signal is present on this channel, all channels set to "Ducked Program", "Low Priority
Trigger" and "Filibuster", are fully attenuated (muted).
Low Priority Trigger - When signal is present on this channel, all channels set to "Ducked Program" will be attenu-
ated by the depth specified on that channel. All channels also set to filibuster will be fully attenuated (muted).
Filibuster - When signal is present on this channel, all channels set to "Ducked Program" will be attenuated by the
depth specified on that channel. All channels also set to "Filibuster" are fully attenuated. Only one filibuster channel is allowed
to be above the threshold at any given time, the rest are fully attenuated. The filibuster input does not allow other signals to
return to normal until 1/2 second after it has fallen below its threshold.
Ducked Program - Sufficient signal present on any trigger channel will cause this channel to be attenuated by the
specified depth.
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