Power Of The Mix; Crosspoint Gain; Mixing Mode; Output Processing - Lectrosonics DM84 Reference Manual

DM84 Digital Matrix Processor

Power of the Mix

The Power of the Mix is the reference used to deter-
mine the gain to be applied to each individual output
channel. In a multi-unit stacked configuration, this data
is sent to the slaves from the master unit.

Crosspoint Gain

Crosspoint Gain is the gain selected either with the
LCD interface or the GUI that determines the level
appearing at the output.

Mixing Mode

The automatic mixing algorithm applies a patented gain
proportional algorithm ( US Patents 5,414,776 and
5,402,500 ) allowing each input assigned to a particular
output to behave differently relative to the other inputs
assigned to the output.
Four different mixing modes are available:
Auto - In Automatic mode the input applied to the
crosspoint is mixed into the output channel using
the the Adaptive Proportional Gain automixing
algorithm in the normal manner. This is the most
common setting.
Direct - Direct mode bypasses the automixing
algorithm.
Override - Override mode is selected when it is
required that the input applied to the crosspoint
always dominates the output channel when it
becomes active.
Background - Background mode is selected when
it is required that the input applied to the crosspoint
dominates the output channel only when all other
inputs are inactive.
Phantom - Phantom mode is selected when it is
required that an input applied to the crosspoint
participate in the automixing algorithm as in Auto
mode, but with a twist - the signal received from
that input does not actually appear in the mix.
NOTE: The M/S (master/slave) switch selects the
signal that the output channel will deliver when the
unit is operating as a slave in a "stacked"
configuration.
Digital
Tx Rx Audio
Network
Rx Tx
Interface
(DANI)
Quad RJ -45 Conn
Typical Output Channel
12
24 + 2 Submixes + Mixing Control
12+ 2 Mixes + Mixing Control
12+2 Mixes + Mixing Control
24 + 2 Submixes + Mixing Control

Output Processing

Each output can receive signals from either the matrix, the
pink noise generator, the tone generator, or, if it is operat-
ing in a multi-unit "stacked" configuration, from the master
unit Digital Audio Network Interface (DANI) source.

Output Source Select

The digital matrix delivers the audio signals used in
normal operation. The pink noise source can be used
for sound masking during operation, and for equaliza-
tion during setup. The tone generator is used for level
adjustments and signal routing diagnostics.
The Master/Slave switch selects whether the audio
signal at the output channel will come from the digital
matrix or the DANI source. When the unit is operating
as a slave, the signal will come from the DANI source.

Mic/line Output Channels

All outputs include an attenuator to reduce the output
level from line to mic level. The passive attenuator does
not change the signal to noise ratio of the signal, but
simply applies 40 dB of attenuation to reduce the signal
level.
IMPORTANT: Even though the output level
adjustment provides up to 70 dB of attenuation, a
line level output should not be used to deliver a
mic level signal. Using a line level output will
cause the signal to noise ratio to be reduced by 40
dB. Always use the mic level option for mic level
signals.
M
S
Signal Processing
1 kHz Tone
Generator
Pink Noise
Generator
Out
D/A
/
Atten
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