Digital Telephone Hybrid
Rio Rancho, NM
9
Digital Matrix
The digital matrix provides signal routing and commu-
nication with other devices in the system, and applies
automatic mixing and level control. (See
Digital Matrix
Functional Block Diagram
.)
Automixer Cell
The Automixer Cell is the core of the matrix. It is where
level control for the automatic mixing algorithm, mixing
mode and crosspoint gain is applied to data gathered
from other channels and devices. The cell receives data
from the master unit in a multiple unit stacked configura-
tion and from the slave units farther down in the chain.
Power of the Mix
The Power of the Mix is the reference used to determine
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 with the control
panel that determines the level at the output.
Mixing Mode
The automatic mixing algorithm applies a
patented gain proportional algorithm (
US
Patents #5,414,776
and
#5,402,500
) al-
lowing 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 - In Direct mode the automixing algo-
rithm is bypassed.
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 se-
lected when it is required that the input
applied to the crosspoint dominates the
output channel
only when all other inputs
are inactive.
Digital Matrix Functional Block Diagram
(Typical Matrix Crosspoint)
+
Automixer
Cell
Submix
Submix
Crosspoint Gain
-70 to 20 dB
1 dB steps
Mixing Mode
- Auto
- Direct
- Override
- Background
Audio Input
Power of the Mix
Power of the
Submix
Power of the
Submix
DMTH4 Functional Block Diagram
Содержание DMTH4
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