Lectrosonics DM1612, Справочное руководство

Страница: 14 / 48

14
DM Series Digital Matrix Processors
Activity Indicator
Output Gain
-70 - +20 dB
1 dB steps
One of 24 Output Signal Processing Blocks
Nine Filter
Stages
Delay Compressor Limiter
Level Meter
Off, LP, HP, BP,
PEQ, LS, HS
6 or 12 dB/oct.
Butterworth or Bessel
when applicable
0 - 5s
0.5 ms steps
Threshold
Comp. Ratio
Attack TC
Release TC
Indicator
Activity Indicator
Gain Reduction Indicator
Threshold
Comp. Ratio
Attack TC
Release TC
Output Signal Processing Stages
Each output channel provides a delay, nine filters, plus a
compressor and limiter to idealize the channel for its
function in the sound system.
Digital Delay
Delay on the output signal is normally used for time
alignment when loudspeakers are positioned in different
locations with overlapping coverage patterns that cause
comb filtering. The signal can be delayed up to 5
seconds in 0.5 ms increments to eliminate comb filtering
and improve intelligibility.
Filters
Up to nine filters can be implemented at each output to
idealize the output channel equalization and implement
crossover networks for bi-amped or tri-amped loud-
speaker systems.
The filter types include:
Low pass
High pass
Band pass
Parametric EQ
Low shelving
High shelving
Filter slopes can be selected with 6 or 12 dB per octave
Butterworth or Bessel parameters. Multiple filters can
be assigned to creater steeper slopes in 6 dB steps.
Compressor and Limiter
A versatile compressor and limiter are provided at each
output to control the average level and dynamics of the
audio signal, and restrict the maximum output level to
optimize the channel for its purpose. Compression is
often needed when the channel is feeding a recorder,
and limiting is often used to protect a loudspeaker
system and reduce distortion and amplifier overload.
Compressor adjustment parameters include:
Threshold
Attack
Release
Compression ratio
Makeup gain
Limiter adjustment parameters include:
Threshold
Attack
Release
Output Gain and Level Indicator
The output level can be adjusted from - 70 dBu to +20
dBu in 1 dB steps to perfectly match the requirements of
the device being fed by the channel. A bar graph is
provided by the on screen GUI to accurately indicate the
output level as it operates and is adjusted.