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All DSP functions are adjusted using the WinControl
software application. Detailed information on the use of
WinControl is beyond the scope of this manual, and users
should consult the WinControl Help files.
Level controls
The gain of each analogue input and each digital input
may be adjusted independently over the range -70 dB to
+20 dB. Nominal input level with 0 dB gain is 0 dBV, and
the maximum input level is +19 dBV (peak).
The source of DSP audio input 1 and 2 (either analogue or
Dante
) is software configurable.
™
The output level of each amplifier channel can also be set
independently, with a range of 80 dB.
Note that after the inputs have been summed, there is
also a master level control ("Volume"), which provides a
single-point adjustment of the output levels of all amplifier
channels.
Polarity (phase) inversion is also available for each input
and output.
EQ adjustment
The DSP section provides very comprehensive signal
equalisation for both inputs and outputs. Each analogue
input and each digital input has its own 4-band parametric
equaliser. Each amplifier channel has its own 8-band
parametric equaliser. These provide up to 25 dB of cut or
boost per band (depending on filter type selected) over the
range 10 Hz to 24 kHz, with per-band selection of filter type.
Output equalisation can be used to construct crossover
filtering to allow the IndustryAmps to be used with multi-
way loudspeaker systems. Input equalisation permits
tailoring of individual input signals for optimum clarity.
Matrix
A matrix is provided so that any of the sixteen inputs can
be routed to any of the amplifier outputs. Where more than
one input is selected to go to the same output then the
inputs are summed.
16
AXYS
Autogain
The DSP section includes an autogain algorithm which can be
set to automatically adjust the overall volume level according
to the ambient noise level detected by a microphone
connected at the ANS mic input. The algorithm measures the
ambient noise in gaps in the programme material being fed
via the IndustryAmp. Once enabled, the amount of additional
gain per dB of ambient noise increase can be controlled, as
well as the threshold at which gain adaption begins.
The autogain algorithm can also be used to provide a level
attenuation depending on a "volt free" input on the ANS mic
input (pins '+' and '-'). When the input is open circuit then the
autogain provides no reduction in overall volume, when the
input is short circuit the predefined reduction in volume set by
the autogain comes into affect.
Delay
Delay may be inserted in the output channel of the audio
signal chain.
SURVEILLANCE FUNCTIONS
The IndustryAmp incorporates various surveillance features
to ensure continuous operation in critical applications.
Auto-input switching
Normal configuration of the IndustryAmp is for up to
sixteen inputs to be permanently summed, so that signals
on all enabled inputs are always fed through the system
(matrix selection dependent)
However, if wished, priorities may be assigned to individual
inputs so that audio through the system is normally derived
from one input only. The inputs are then monitored, either
for presence of pilot tone, or for a continuous signal level
above a pre-determined threshold. In the event of non-
detection of the pilot tone or input signal, the signal source
can be switched to that on an alternative input.
This arrangement is primarily intended to provide
redundancy; by utilising more than one audio distribution
path, a high degree of system of security can be gained.
IndustryAmp-DN User Manual Rev 3.0
®
201911/IAMPDN_3.0
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