Select the signal source – Lectrosonics DMPA12 User Manual
Page 14
DMPA12 Installation Guide
LECTROSONICS, INC.
14
Select the Signal Source
The input signal to the amplifier is taken from the DANI
(digital audio network interface) or from a tone or pink
noise source generated in the amplifier. It is useful to
use the tone or pink noise source during initial setup
to verify proper connections and signal routing to the
loudspeakers.
With a DM processor installed and microphones or
other audio sources are available, the sound system
can be operated during setup. The signals in the system
are delivered to the DMPA12 amplier via the DANI bus,
back propagating from the Master to the Slaves, and
forward propagating from Slaves to the Master. This
bi-drectional signal flow allows for a variety of configura-
tions in the setup.
Back propagated signals from the Master to the Slaves
on the DANI are labeled “Final Mix 1,” “Final Mix 2” and
so on. The term Final Mix refers to the mix at each out-
put of the Master unit in the system.
Forward propagated signals moving upward from the
Slaves toward the Master are labeled “FP Main Mix 1,”
“FP Main Mix 2,” etc.
There are also expansion buses that provide two addi-
tional sources for both the back and forward propagated
sources. These include “Exp” in the source name in the
pull down dialogue box.
The DMPA12 is usually positioned at the bottom of the
stack, configured as a Slave, with inputs coming from
the back propagated signals from the Master.
This will provide Final Mixes 1 through 12, plus the two
Exp Final Mix signals from the Master unit.
NOTE: The DMPA12 must first be connected
directly to a computer to allow the signal sources
and levels to be set. This is mandatory to allow
signal flow through the unit, as the factory default
settings have no source selected and the outputs
are turned off.
If the system design utilizes 24 Final Mix signals at the
output of the Master, two DMPA12 amplifiers must be
positioned at the top of the stack, one as the Master
and the other as a Slave just below the Master.
In this configuration the Master and the Slave just below
it will have access to FP Main Mix signals 1 through 24,
plus the Exp bus signals, which will include all signals
from all slave units in the system.
Tone and noise sources
Matrix output sources
Master
Slave
Slave
Slave
Slave
EXPANSION
A
B
TX
RX
RX
TX
EXPANSION
A
B
TX
RX
RX
TX
EXPANSION
A
B
TX
RX
RX
TX
EXPANSION
A
B
TX
RX
RX
TX
EXPANSION
A
B
TX
RX
RX
TX
Audio Final Mix and
Data Back Propagation
Audio Submix and
Data Forward Propagation
Master
Slave
Slave
Slave
DMPA12 Slave
EXPANSION
A
B
TX
RX
RX
TX
EXPANSION
A
B
TX
RX
RX
TX
EXPANSION
A
B
TX
RX
RX
TX
EXPANSION
A
B
TX
RX
RX
TX
EXPANSION
A
B
TX
RX
RX
TX
Audio Final Mix and
Data Back Propagation
Output Channels 1 - 12
Slave
Slave
Slave
Slave
Slave
EXPANSION
A
B
TX
RX
RX
TX
EXPANSION
A
B
TX
RX
RX
TX
EXPANSION
A
B
TX
RX
RX
TX
EXPANSION
A
B
TX
RX
RX
TX
EXPANSION
A
B
TX
RX
RX
TX
DMPA12 Slave
EXPANSION
A
B
TX
RX
RX
TX
DMPA12 Master
EXPANSION
A
B
TX
RX
RX
TX
Output Channels 1 - 12
Output Channels 13 - 24
Audio Submix and
Data Forward Propagation