Lectrosonics DMPA12 User Manual download pdf (Page 14)

DMPA12 Installation Guide

LECTROSONICS, INC.

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

EXPANSION

RX TX

EXPANSION

RX TX

EXPANSION

RX TX

EXPANSION

RX TX

EXPANSION

RX TX

Audio Final Mix and

Data Back Propagation

Audio Submix and

Data Forward Propagation

Master

Slave

DMPA12 Slave

EXPANSION

RX TX

EXPANSION

RX TX

EXPANSION

RX TX

EXPANSION

RX TX

EXPANSION

RX TX

Audio Final Mix and

Data Back Propagation

Output Channels 1 - 12

Slave

EXPANSION

RX TX

EXPANSION

RX TX

EXPANSION

RX TX

EXPANSION

RX TX

EXPANSION

RX TX

DMPA12 Slave

EXPANSION

RX TX

DMPA12 Master

EXPANSION

RX TX

Output Channels 1 - 12

Output Channels 13 - 24

Audio Submix and

Data Forward Propagation

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Lectrosonics DMPA12 User Manual Page 14

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