Lectrosonics DM1624F User manual

DM Series
Digital Audio Processors
Models:
DM1624F
DM1612F
DM812
Firmware Versions 1.5.0 and higher
REFERENCE MANUAL
Rio Rancho, NM, USA
www.lectrosonics.com
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DM Series Digital Matrix Processors
LECTROSONICS, INC.
2

Reference Manual
Rio Rancho, NM 3
Important Safety Instructions
This symbol, wherever it appears, alerts you to the presence of uninsulated dangerous voltage inside the
enclosure -- voltage that may be sufficient to constitute a risk of shock.
This symbol, wherever it appears, alerts you to important operating and maintenance instructions in the
accompanying literature. Please read the manual.
1) Read these instructions.
2) Keep these instructions.
3) Heed all warnings.
4) Follow all instructions.
5) Do not use this apparatus near water.
6) Clean only with a dry cloth.
7) Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions.
8) Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including
amplifiers) that produce heat.
9) Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with
one wider than the other. A grounding type plug has two blades and third grounding prong. The wider blade or
the third prong are provided for your safety. If the provided plug does not fit into your outlet, consult an electri-
cian for replacement of the obsolete outlet.
10) Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles, and the
point where they exit from the apparatus.
11) Only use attachments/accessories specified by the manufacturer.
12) Use only with the cart, stand, tripod, bracket, or table specified by the manufacturer, or sold with the apparatus.
When a cart is used, use caution when moving the cart/apparatus combination to avoid injury from tip-over.
13) Unplug this apparatus during lightning storms or when unused for long periods of time.
14) Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged
in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have fallen into
the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been
dropped.
15) WARNING -- TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS APPARATUS
TO RAIN OR MOISTURE.

DM Series Digital Matrix Processors
LECTROSONICS, INC.
4
Table of Contents
Important Safety Instructions................................................3
General Overview ...................................................................5
Input Processing ...................................................................7
Digital Matrix .........................................................................7
Output Processing ................................................................9
DM Series Controls and Features .......................................10
Front Panels........................................................................10
Rear Panels ........................................................................11
LCD Interface ........................................................................12
Operation with Front Panel Controls ...................................12
Boot Sequence Screens .....................................................12
General Overview - Menus and Screens ............................13
Top Menu ............................................................................13
Setup Menu.........................................................................13
Setup Screens ....................................................................13
The “Back” Button ...............................................................13
Input Setup Screen .............................................................14
Matrix Crosspoint (Xpoint) Setup Screen............................15
Preset Setup Screens.........................................................18
System Information Screen.................................................19
Stacking Multiple Units........................................................19
Locking Front Panel Controls..............................................19
Command View Screen ......................................................21
Serial Port Speed Adjustment.............................................21
Installing LecNet2™Software and USB Driver ...................23
Installation with LecNet2 Device Installer ...........................23
Manual Installation ..............................................................24
Firmware Updates ................................................................25
Using the Update Wizard ....................................................25
Serial Interface and Control Commands ............................28
Wildcards ............................................................................28
Differences between DM units ............................................28
DM General Commands .....................................................28
DM1624F Audio Input Commands ......................................31
DM1624F Matrix Crosspoint Commands............................33
DM1624F Audio Output Commands ...................................35
DM1624F Input Compressor Commands ...........................37
DM1624F Output Compressor Commands ........................38
DM1624F Output Limiter Commands .................................39
DM1624F Programmable I/O Commands ...........................40
DM1624F Rear Panel Control Commands..........................44
DM1624F ADFE Commands ................................................46
ADFE Filter Numbers Mapped to Center Frequencies .......46
DM Command Grammar Rules............................................47
Macros and Macro Control ..................................................48
About Macros......................................................................48
Rear Panel Control - Hardware............................................49

Reference Manual
Rio Rancho, NM 5
General Overview
As digital technology continues to advance in a va-
riety of markets and products, considerable benefits
also evolve in audio processing systems for installed
sound systems that employ multiple microphones and
loudspeakers in a common acoustical space. The
DM Series digital processors take advantage of these
advances with hardware/software designs that address
modern applications in boardroom, courtroom, sound
reinforcement and teleconferencing systems.
The latest generation DSP microchips and microproces-
sors are the core of the engineering of the DM Series
products. The focus and purpose is to meet the require-
ments of modern applications and also the demands for
convenience and automation.
The DM can be configured either via a front panel
mounted LCD and controls, or LecNet2™, a user-
friendly, yet powerful control program. LecNet2™ offers
quick configuration and full command of the system
through a USB or RS-232 compatible interface. Once
configured, the units operate independently.
All models in the DM Series offer the same signal pro-
cessing functions, and vary only by the number of audio
inputs and outputs available. The DM’s basic structure
consists of three stages: Input, Matrix and Output.
(See DM1624F Signal Flow Block Diagram below and
DM1624F Functional Block Diagram .)
Each input channel includes a high quality analog
preamplifier, with digital and analog level control to
maximize signal to noise ratio and minimize distortion,
followed by a 24-bit A-D converter. Extensive digital
signal processing is provided on each input channel.
Each input channel is processed and filtered as needed
and the signal is delivered into the matrix.
The digital matrix mixer distributes each input signal to
any selected combination of outputs, with level control
at each crosspoint. The matrix processes the signals
and delivers them to the assigned outputs and com-
municates with other devices in the system. Each
output receives signals from the mixing matrix, the pink
noise generator or the tone generator as needed for
setup, diagnostics or operation. Each of the 24 outputs
includes extensive signal processing to optimize the
mixed signal for the intended purpose, such as sound
reinforcement, recording or teleconferencing.
Multiple units can be stacked together using the Digi-
tal Audio Network Interface (DANI). DANI connects
the digital audio outputs of the master and slave units
through standard RJ45 connectors.
When multiple units are stacked, mixing data and the
digital audio are passed between the slave units and
the master unit through the DANI. Multiple units can be
stacked in a master/slave configuration to expand the
number of inputs to hundreds of channels.
The audio and data from all units in the stack are gath-
ered in the matrix in the master unit, which is where the
final mix signals are generated. The first 12 final mix
signals from the master are back propagated through
the DANI to each slave. (See DM Series Back Propa-
gation Diagram.) These signals are available on the
slave unit outputs 1 through 12. If a slave unit is also a
DM1624F, outputs 1 through 12 are also repeated on
outputs 13 through 24. Each output channel on a slave
unit retains its own processing (filters, compressor, etc.)
even though the signal mix is the same as that channel
on the master unit. (See diagram on page 12).
DM1624
Master
DM1624
Slave
DM1624
Slave
1
24
Outputs
DM1624 Master
with
DM1624 Slaves
DM1624
Master
DM1612
Slave
DM812
Slave
1
24
1
12
1
12
Master and
Slave Outputs
Outputs
Outputs
DM1624 Master
with
DM1612 or DM812 Slaves
12
13 Master only
Outputs
DM1612
Master
DM1612
Slave
DM812
Slave
1
1
12
1
12
Outputs
Outputs
DM1612 Master
with
DM1612 or DM812 Slaves
12
Outputs
1
Outputs
12
Outputs
1Outputs
12
1(13)
12(24)
Outputs
1(13)
12(24)
16 by 24+2
Automatic
Mixing
Matrix
Input #1
Processing
Input #16
Processing
Output #1
Processing
Output #24
Processing
Tone
Generator
1 kHz, 0 dBu
Pink Noise
Generator
0 dBu
24 Output Submixes
2 Expansion Submixes
26 Automixing Aux. Data
2 Expansion Signals
26 Automixing Control Data
24 Output Submixes
2 Expansion Submixes
26 Automixing Aux. Data
2 Expansion Signals
26 Automixing Control Data
.
.
.
.
.
.
DM1624F Signal Flow Block Diagram
(Typical of DM Series)

DM Series Digital Matrix Processors
LECTROSONICS, INC.
6
16 by 24 (+ 2) Automatic Mixing Matrix
1 kHz Tone
Generator
Pink Noise
Generator
Cluster of Four
SHARC
®
DSPs
SHARC is a registered trademark of Analog Devices,Inc.
USB
Port
RS-232
Port
Prog I/O
Port
LCD
Buttons &
Rotary
Micro
Controller
Prog I/O Conn
2 x DB25
LecNet 2 Conn
1/8 '' Jack
Front & Rear
USB B Conn
Control
Signals
16
22
Tx
Tx
Rx
Rx
Digital
Audio
Network
Interface
(DANI)
24 + 2 Submixes + Mixing Control
24 + 2 Submixes + Mixing Control
12 + 2 Mixes + Mixing Control
12 +2 Mixes + Mixing Control
Sync Audio Frame Sync
Quad RJ-45 Conn
Signal Processing
Signal Processing
Signal Processing
Signal Processing
Signal Processing
Signal Processing
Signal Processing
Signal Processing
Signal Processing
Signal Processing
Signal Processing
Signal Processing
Signal Processing
Signal Processing
Signal Processing
Signal Processing
16 Mi c/Line Inputs
In 1
In 8
In 7
In 6
In 9
In 5
In 4
In 3
In 2
In 13
In 12
In 11
In 10
In 16
In 15
In 14
24 Outputs (16 Li ne + 8 Mic/Line)
Out 1
Out 9
Out 8
Out 7
Out 6
Out 5
Out 4
Out 3
Out 2
Out 12
Out 11
Out 10
Out 20
Out 19
Out 18
Out 17
Out 16
Out 15
Out 14
Out 13
Out 24
Out 23
Out 22
Out 21
Signal Processing D/AOut
Atten
M
S
Signal Processing D/AOut
Atten
M
S
Signal Processing D/AOut
Atten
M
S
Signal Processing D/AOut
Atten
M
S
Signal Processing D/A
M
S
Signal Processing D/A
M
S
Signal Processing D/A
M
S
Signal Processing D/A
M
S
Signal Processing D/A
M
S
Signal Processing D/A
M
S
Signal Processing D/A
M
S
Signal Processing D/A
M
S
Signal Processing D/AOut
Atten
M
S
Signal Processing D/AOut
Atten
M
S
Signal Processing D/AOut
Atten
M
S
Signal Processing D/AOut
Atten
M
S
Signal Processing D/A
M
S
Signal Processing D/A
M
S
Signal Processing D/A
M
S
Signal Processing D/A
M
S
Signal Processing D/A
M
S
Signal Processing D/A
M
S
Signal Processing D/A
M
S
Signal Processing D/A
M
S
A/DProg
Phan .
On/Off
A/DProg
Phan .
On/Off
A/DProg
Phan .
On/Off
A/DProg
Phan .
On/Off
A/DProg
Phan .
On/Off
A/DProg
Phan .
On/Off
A/DProg
Phan .
On/Off
A/DProg
Phan .
On/Off
A/DProg
Phan .
On/Off
A/DProg
Phan .
On/Off
A/DProg
Phan .
On/Off
A/DProg
Phan .
On/Off
A/DProg
Phan .
On/Off
A/DProg
Phan .
On/Off
A/DProg
Phan .
On/Off
A/DProg
Phan .
On/Off
DM1624F Functional Block Diagram

Reference Manual
Rio Rancho, NM 7
Input Processing
Each input channel provides individual stages for gain,
delay, filtering and compression. (See Typical Input
Signal Processing Blocks.) Processing levels can be
set up with the front panel LCD or with the software GUI
provided with the units. (Details on the signal process-
ing stages are available in the Help available with the
LecNet2™ software.) There are 16 Input Processing
Blocks in the DM1624F and DM1612FF and eight in the
DM812.
Input Gain
The input preamplifier applies software controllable gain
with both analog and digital components, with the ratio
between them automatically optimized for maximum
signal to noise ratio. A single control point is provided
to simplify setup. A level indicator and clipping indicator
are provided in the GUI display.
Delay
A digital delay follows the input stage. A delay of up to
1 second can be applied in 0.5 ms increments.
Filters
Six digital filters are provided to compensate for differ-
ences between various microphones and other audio
sources.
ADFE Filters
Six ADFE (automatic digital feedback eliminator) filters
are provided on each input to suppress acoustic feed-
back that may occur. Applying ADFE at the input rather
than at the output allows the filters to deal exclusively
with the unique characteristics of the individual input
channel rather than with the composite of multiple chan-
nels that appear at any one output.
Compressor
A sophisticated compressor stage is provided following
the other stages to control the dynamic characteristics
of the input. The compressor provides control over
threshold, compression ratio, plus attack and delay time
constants.
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
configuration and from the slave units farther down in
the chain.
Typical Input Signal Processing Block
+
Automixer
Cell
Submix
Submix
Crosspoint Gain
-70 to 20 dB
1 dB steps
Mixing Mode
- Auto
- Direct
- Override
- Background
- Phantom
Audio Input
Power of the Mix
Power of the
Submix
Power of the
Submix
Digital Matrix Functional Block Diagram
(Typical Matrix Crosspoint)

DM Series Digital Matrix Processors
LECTROSONICS, INC.
8
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 ap-
pearing 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 us-
ing 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 be-
comes 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 - This special mode is useful in mix-
minus reinforcement systems with difficult acoustic
environments where system gain is lacking and
cross coupling between loudspeaker zones is tak-
ing place. The Phantom mode allows an input ap-
plied to the crosspoint to participate in the automix-
ing algorithm as in Auto mode, but with a twist - the
signal received from that input does not actually
appear in the mix at that output.
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.
NOTE: certain output channels
provide an attenuator to reduce the
signal to microphone 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 a mic/line switchable
output for mic level signals.
1 kHz Tone
Generator
Pink Noise
Generator
Tx
Tx
Rx
Rx
Digital
Audio
Network
Interface
(DANI)
24 + 2 Submixes + Mixing Control
24 + 2 Submixes + Mixing Control
12 + 2 Mixes + Mixing Control
12 +2 Mixes + Mixing Control
Quad RJ-45 Conn
Signal Processing D/AOut
Atten
M
S/
Digital Matrix
Typical Output Channel
The Phantom mode is available only when us-
ing DM1624F firmware version 1.5.0 or higher
and then only if the Phantom mix mode option is
enabled. This setting is only available when actu-
ally connected to a DM processor. It is not available
when working offline.
In a mix-minus reinforcement system with a one-to-
one relationship in the input and output numbering, the
matrix typically follows a pattern similar to the follow-
ing illustration. In this example the shaded crosspoints
(magenta/pink color) are enabled, but configured for
the Phantom Mode. These crosspoints participate in
the auto mixing algorithm, but the actual signal from the
input is not present in the mix. This allows each input
to attenuate the return path to loudspeakers near by
attenuating that crosspoint.
IMPORTANT: Phantom crosspoints must be
enabled and the gain set on each one to adjust its
effect on the NOM attenuation in that output group.

Reference Manual
Rio Rancho, NM 9
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
Some outputs include an attenuator to reduce the out-
put 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.
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. (See Typical Output
Signal Processing Block.)
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 sec-
onds 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 sys-
tem 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.
Activity Indicator
Output Gain
-70 - +20 dB
1 dB steps
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
Typical Output Signal Processing Block

DM Series Digital Matrix Processors
LECTROSONICS, INC.
10
DM Series Controls and Features
DM1624F - 16 inputs, 24 outputs
Front Panels
The front panels of the DM Series include a USB port
and LCD interface in addition to Power On/Off and other
system controls. The front panel controls can be locked
out with special button presses to prevent tampering
and inadvertent adjustments. (See Locking/Unlocking
Front Panel Controls.
The control interface is the same for all three models,
since the difference between them is simply the number
of inputs and outputs.
POWER On/Off Switch
The POWER On/OFF Switch is used to turn the DM
unit on (1) or off (0).
LCD Interface
The LCD Interface is a graphics type interface that can
be used to set up and operate a DM system or provide
feedback on system operation.
PUSH FOR MENU/SELECT Rotary Control
The PUSH FOR MENU/SELECT rotary control is used
to select a menu, submenu or setup screen and for
selecting or setting operating parameters. This control
is often used for minor tweaking after the original setup
has been downloaded from a computer system via the
USB port.
USB Port
Standard USB Version 1.1 connector for setup and con-
trol of the DM from a Windows-based computer system
with USB interface.
Reserved Button
Currently used with the BACK Button to lock or unlock
the front panel controls.
BACK Button
The BACK button is used to return to the previous
screen or menu.
Item Select Buttons
The Item Select Buttons are used to select items from
setup screens.
POWER On/Off SwitchUSB Port
PUSH FOR MENU/SELECT
Rotary Control
BACK Button
LCD InterfaceReserved Button
Item Select Buttons
DM1612F - 16 inputs, 12 outputs
DM812 - 8 inputs, 12 outputs

Reference Manual
Rio Rancho, NM 11
Rear Panels
DM1624F - 16 inputs, 24 outputs
DM1612F - 16 inputs, 12 outputs
DM812 - 8 inputs, 12 outputs
POWER Plug
RS232 Port
USB Port Programmable Input and
Output Ports
DANI Audio Inputs and Outputs
POWER Plug
Standard NEMA 5-15 three-pin power plug capable of
accepting 100-240 VAC, 47-63 Hz.
RS-232 Port
A serial RS-232 interface is provided for setup and
control via a computer, or for connecting RS-232 serial
control devices from other companies.
USB Port
Standard USB Version 1.1 connector for setup and con-
trol of the DM from a Windows-based computer system
with USB interface.
Programmable Input and Output Ports
Programmable inputs or outputs used to enable control
over a variety of parameters or to indicate either chan-
nel activity or the current state of a programmable input.
DANI
DANI, or Digital Audio Network Interface, is used to
connect the digital audio outputs of the master and
slave units in stacked configurations.
Audio Inputs and Outputs
Analog audio input and output connectors. The function
of these inputs and outputs is consistent between units.
Only the number of analog inputs and outputs vary.

DM Series Digital Matrix Processors
LECTROSONICS, INC.
12
PUSH FOR
MENU/SELECT
BACK
LCD Interface
Operation with Front Panel Controls
Some adjustments, such as levels and mute status, can
be made to DM Series processors without a computer
using the front panel LCD interface. While it is highly
recommended that the supplied DM Control Panel soft-
ware (GUI) be used, the ability to make minor adjust-
ments without a computer is often valuable.
Direct interaction with the processor is provided using
the front panel buttons, the PUSH FOR MENU/SELECT
rotary encoder control and the LCD. A variety of menus
and setup screens are provided. This interface is used
mainly for minor adjustments to rear panel input and
output levels. The GUI is used for other functions, such
as system setup and control.
Rotary encoder control. Rotate
to highlight a menu item or adjust
operating parameter and press to enter
a submenu or setup screen.
BACK button used to return to
previous menu.
Item select buttons used on setup screens.
NOTE: Adjustments made with the LCD controls
are real time. As each setting is made, the result
will be heard immediately.
Boot Sequence Screens
The first screen displays the model number.
A second screen briefly displays the serial number and
the firmware version.
The display then returns to the first screen showing the
model number, indicating that the unit has completed
boot sequence.
Used with the BACK button to lock or
unlock the front panel controls.

Reference Manual
Rio Rancho, NM 13
PUSH FOR
MENU/SELEC
T
BACK
General Overview - Menus and Screens
Item Select buttons
The information presented in the front panel LCD
includes a TopMenu, various Setup Menus and support-
ing Setup Screens. Pressing the PUSH FOR MENU/
SELECT control opens the TopMenu.
Top Menu
Pressing the PUSH FOR MENU/SELECT control after a
DM completes the Boot Sequence opens the TopMenu.
The TopMenu lists the Setup Menus used to access the
Setup Screens used to configure the DM’s operating
parameters. Rotate the control to highlight a item from
the list, then press the control to select that item.
Setup Menu
The Setup Menu lists the various setup screens used
to set the operating parameters for the system’s inputs,
mixing matrix and outputs. A fourth item on the list is
used to set the system as a Master or Slave unit. Ro-
tate the PUSH FOR MENU/SELECT control to highlight
an item on the list, then press the control to select that
item.
Setup Screens
The Setup Screens are used to change system operat-
ing parameters for the selected channels. The Setup
Screen will display the type of setup (Input, Matrix,
Outputs or General) in the upper left corner and, if
necessary, the channel or channels that the action will
be performed.
A row of setup actions along the bottom of the LCD are
selected via one of the six Item Select Buttons. This
example shows an Input Setup Screen with the RPG
(Rear Panel Gain) button selected for Channel 1. The
gain is currently set for 0 dB.
The “Back” Button
Returns LCD to previous screen. Also used with upper
button to change lock code.

DM Series Digital Matrix Processors
LECTROSONICS, INC.
14
Input Setup Screen
The Input Setup Screen is used to control the rear
panel analog inputs. The settings are accomplished in
“real time,” i.e., you will immediately hear the result of
any changes. When finished, use the front panel BACK
button to exit the Input Setup Screen and return to the
Setup Menus.
Channel
Parameter
Display Area
Items List
Screen Title
⇓
⇓
To open the Input Setup Screen, navigate to the Setup
Menu, highlight Inputs and press the PRESS FOR
MENU/SELECT control.
There are four sections to the Input Setup Screen:
Screen Title, Items List, Parameter Display Area and
Channel. The various entries in the Items List are
accessed via the Item Select Buttons below the LCD.
The Channel is the currently selected channel and the
Parameter Display Area displays the name and current
setting of the various parameters that can be adjusted
through this screen.
Input Channel Select
This section is used to view or change the current input
channel. This section is selected by pressing the asso-
ciated Item Select Button. Rotate PUSH FOR MENU/
SELECT until the desired channel number is displayed
in the upper right corner of the LCD.
NOTE: Select the input channel to be modified
with the item select buttons before moving to the
following steps.
RP Gain
RPG is used to view or change the attenuation ap-
plied to the rear panel input for the selected analog
input channel. Select RPG by pressing the Item Select
Button below RPG. Rotate the PRESS FOR MENU/
SELECT control until the desired Rear Panel Gain is
displayed in the Parameter Display Area.
This setting is normally controlled by hardware (such as
variable resistors or switches) connected to the pro-
grammable input ports on the rear panel of the unit.
NOTE: RP Gain is an attenuator only, with a range
from 0 dB to -30 dB.
Gain
GAI is used to view or change the input gain for the se-
lected channel. Select GAI by pressing the associated
Item Select Button. Rotate the PRESS FOR MENU/
SELECT control until the desired input channel gain is
displayed in the Parameter Display Area.
Up to 70 dB of gain that can be applied to each input
ranges (-10 dB to +60 dB) in 1 dB increments.
Mute
MUT is used to view or change the mute state (Mute
or Unmute) of the selected channel. Select MUT by
pressing the associated Item Select Button. Rotate the
PRESS FOR MENU/SELECT control to select Mute or
Unmute. In this example, Input 1 is Unmuted - in other
words, the sound from this channel is turned on.
Phase Inv
INV is used to set the audio phase invert status (Off
or On) of the selected input channel. Select INV by
pressing the associated Item Select Button. Rotate the
PRESS FOR MENU/SELECT control to turn on or off
the audio phase invert function.

Reference Manual
Rio Rancho, NM 15
(Routing input channel 1 to output channel 1.) Chang-
ing either input or output channel changes the matrix
crosspoint.
To change the output channel, press the Item Select
Button below OUT in the Item List. Rotate PUSH FOR
MENU/SELECT until the desired output channel is
displayed.
To change the input channel, press the Item Select
Button below IN in the Item List. Rotate PRESS FOR
MENU/SELECT until the desired input channel is dis-
played. Press PRESS FOR MENU/SELECT to set the
current matrix crosspoint input to the selected channel.
NOTE: Select the desired matrix crosspoint before
making the following adjustments.
MixMode
Defines the mixing mode used to combine the inputs to
the selected matrix crosspoint. Four modes are avail-
able: Auto, Direct, Override and Background. (See Digi-
tal Matrix, Mixing Mode for a description of the various
mixing modes.)
To view or change the mixing mode for the selected
crosspoint, press the Item Select Button below MIX in
the Item List, then rotate PUSH FOR MENU/SELECT
to display the desired mixing mode in the Parameter
Display Area.
Gain
Select GAI to view or change the gain for the selected
crosspoint. After the desired input and output have been
selected, adjust the gain to be applied at this cross-
point. Values range from -70 dB to +20 dB in 1 dB
increments.
PhanPwr
PHA is used to turn phantom power on or off for the
selected input channel. Select PHA by pressing the
associated Item Select Button. Rotate PUSH FOR
MENU/SELECT change the current setting.
Matrix Crosspoint (Xpoint) Setup Screen
The Matrix Setup Screen is used to apply automatic
mixing and level control to the digital matrix crosspoints.
The settings are accomplished in “real time,” i.e., you
will immediately hear the result of any changes. When
finished, use the front panel BACK button to exit the
Input Setup Screen and return to the Setup Menus.
Input
Channel
Parameter
Display Area
Items List
Screen Title
Output
Channel
⇓
⇓
To select the Matrix setup screen, navigate to the Setup
menu, highlight Matrix and press the PRESS FOR
MENU/SELECT control.
There are four sections to the Matrix (Xpoint) Setup
Screen: Screen Title, Items List, Parameter Display
Area, and Input and Output Channels. The various
entries in the Items List are accessed via correspond-
ing Item Select Buttons below the LCD. The Input and
Output Channel are the currently selected channels
and the Parameter Display Area displays the name and
current setting of the various parameters that can be
adjusted through this screen.
In/Out Channel Select
The In/Out Channel Select Screen is used to config-
ure individual matrix crosspoints. The selected input
and output channels for the current matrix crosspoint
are displayed at the upper right section of the LCD. In
this example the settings for crosspoint 1,1 are shown.

DM Series Digital Matrix Processors
LECTROSONICS, INC.
16
Mute
Select MUT to view/change the mute state of the se-
lected crosspoint. Rotate the encoder knob to toggle
between choices Mute and Unmute.
Outputs Setup Screen
The Outputs Setup Screen controls the rear panel
outputs. The settings are accomplished in “real time,”
i.e., you will immediately hear the result of any changes.
When finished, use the front panel BACK button to
exit the Outputs Setup Screen and return to the Setup
Menus.
Parameter
Display Area
Items List
Screen Title
Output
Channel
⇓
⇓
To open the Outputs Setup Screen, navigate to the
Setup Menu, highlight Inputs and press the PRESS
FOR MENU/SELECT control.
There are four sections to the Input Setup Screen:
Screen Title, Items List, Parameter Display Area and
Channel. The various entries in the Items List are
accessed via the Item Select Buttons below the LCD.
The Channel is the currently selected channel and the
Parameter Display Area displays the name and current
setting of the various parameters that can be adjusted
through this screen.
Output Select
The Output Select setting is used to view or change the
current output channel. It is accessed by pressing the
appropriate Item Select Button below the LCD. Rotate
the PUSH FOR MENU/SELECT control until the ap-
propriate output channel is displayed in the upper right
corner of the LCD. Press the PUSH FOR MENU/SE-
LECT control to accept the selection.
NOTE: Select the desired output channel with the
item select buttons before making the following
adjustments.
RP Gain
RPG is used to view or change the rear panel gain
setting for the selected output channel. This setting
is normally controlled by hardware connected to the
programmable input ports on the rear panel of the unit,
i.e., variable resistors (pots), switches, etc. (Refer to
the Online Help supplied with the software for more
information on rear panel gain.)
NOTE: RP Gain is an attenuator only, with a range
from 0 dB to -61 dB.
RPG is accessed by pressing the appropriate Item
Select Button below the LCD. Rotate the PUSH FOR
MENU/SELECT control to set the level of attenuation,
then press the PUSH FOR MENU/SELECT control to
accept the selection.
Source
SOU is used to view or change the signal source setting
for the selected output channel. The signal sources
can be the matrix, the 1 kHz Tone generator, the pink
noise generator, or the DANI if the unit is a slave in a
stacked configuration.
SOU is accessed by pressing the appropriate Item
Select Button below the LCD. Rotate the PUSH FOR
MENU/SELECT control to set the output source, then
press the PUSH FOR MENU/SELECT control to accept
the selection.
Level
M/L is used to view or change the output channel level
setting: Mic (microphone) or Line level. The Mic setting
applies 40 dB attenuation to reduce signal level. Only
certain channels support the Mic setting, which is a
hardware feature and the number of Mic level channels
available varies with the unit.
DM1624F 8 Mic/Line Switchable Outputs
DM1612F 4 Mic/Line Switchable Outputs
DM812 4 Mic/Line Switchable Outputs

Reference Manual
Rio Rancho, NM 17
All other channels operate at Line level only. When this
option is selected for an output channel that does not
support the Mic level feature, the value N/A will appear
on the screen. (See screen samples.)
M/L is accessed by pressing the appropriate Item
Select Button below the LCD. Rotate the PUSH FOR
MENU/SELECT control to set the output source, then
press the PUSH FOR MENU/SELECT control to accept
the selection.
Gain
GAI is used to view or change the gain for the selected
output channel.
GAI is accessed by pressing the appropriate Item
Select Button below the LCD. Rotate the PUSH FOR
MENU/SELECT control to set the output gain, then
press the PUSH FOR MENU/SELECT control to accept
the selection. The gain that can be applied to each out-
put is adjustable from -70 dB to +20 dB in 1 dB incre-
ments.
Mute
The MUT control is used to mute or unmute the select-
ed output channel.
MUT is accessed by pressing the appropriate Item
Select Button below the LCD. Rotate the PUSH FOR
MENU/SELECT control to set the output source, then
press the PUSH FOR MENU/SELECT control to accept
the selection. Select “Mute” to silence the output from
the selected channel, or “Unmute” to allow the output to
pass.
General Settings
The General Setup Screen is used to configure the DM
unit as a master or as a slave (M/S). The selected mode
is stored and set as the default when the unit is initially
powered up.
To open the General Setup Screen, navigate to the
Setup Menu, highlight General and press the PRESS
FOR MENU/SELECT control.
⇓
⇓
Parameter
Display Area
Items List
Screen Title
There are four sections to the Input Setup Screen:
Screen Title, Items List, Parameter Display Area and
Channel. The various entries in the Items List are ac-
cessed via the Item Select Buttons below the LCD.
Master/Slave Mode
M/S is used to configure the DM as a Master or a Slave
unit. A change made through this screen comes into
effect the first time power is cycled after the value is set.
M/S is accessed by pressing the appropriate Item
Select Button bel ow the LCD. Rotate the PUSH FOR
MENU/SELECT control to set the value (MASTER or
SLAVE), then press the PUSH FOR MENU/SELECT
control to accept the selection.

DM Series Digital Matrix Processors
LECTROSONICS, INC.
18
After cycling the power, navigate to the SysInfo screen
and check the status of the unit (see System Informa-
tion Screen). A stand-alone unit must be set to the
MASTER mode and will present itself as “Unit: 01 of 01”
on the SysInfo screen. If a unit is set to SLAVE, but is
running by itself or not connected to a Master unit, an
error message will appear at power up stating that no
Master is detected.
Preset Setup Screens
Preset setup screens differ from the other setup
screens in that changes in a Preset screen makes per-
manent changes in the DM’s nonvolatile memory.
In order for the change to become effective, the change
must be “OK’d” prior to exiting the screen to prevent ac-
cidental loss of data.
To open the Presets Setup Screen, navigate to the Top-
Menu, use the PRESS FOR MENU/SELECT control
to highlight Presets, then press the control to open the
Presets Setup Screen.
⇓
⇓
Parameter
Display Area
Items ListScreen Title
Active Setup
Default Setup
There are four sections to the Input Setup Screen:
Screen Title, Items List, Parameter Display Area and
Default/Active Setup. The various entries in the Items
List are accessed via the Item Select Buttons below the
LCD.
Using the “OK” Item on all screens
Because actions available through the Preset Control
screens result in permanent changes to the DM’s non-
volatile memory, a three-step sequence is required to
make changes.
The first step is to select the Preset Control screen and
make the necessary changes in that screen. The sec-
ond step is to use “OK” to authorize the change. Finally,
the PUSH FOR MENU/SELECT control is pressed to
change the units nonvolatile memory.
NOTE: As a safeguard, the OK button must be
pressed to confirm an action before pressing the
PUSH FOR MENU/SELECT control to initiate the
action.
In the example, the STO (store active setup) action has
been selected, with preset 1 as the destination. In the
lower screen, “OK” has been selected. When PUSH
FOR MENU/SELECT control is pressed, preset 1 will
be overwritten with the contents of the active setup. In
this case, Act: 3 is the active setup.
If “OK” had not been selected, pressing the PUSH FOR
MENU/SELECT control would have had no effect.
The Preset screens require an additional step to
apply the action selected - the OK button. This
provides a safeguard against accidental preset
activities or overwriting a stored preset.
DEF - PowUpDef
DEF is used to view or change the setting for the
powerup default preset. This preset then becomes the
active (default) configuration the next time the unit’s
power is cycled.
DEF is accessed by pressing the appropriate Item
Select Button below the LCD. Rotate the PUSH FOR
MENU/SELECT control to set the value, then, us-
ing the Item Select Button, select “OK.” Finally, press
the PUSH FOR MENU/SELECT control to accept the
selection.
FAC - SetToFac
FAC is used to reset the contents of a memory preset
location to factory default settings.
FAC is accessed by pressing the appropriate Item
Select Button below the LCD. Rotate the PUSH FOR
MENU/SELECT control to set the value, then, us-
ing the Item Select Button, select “OK.” Finally, press
the PUSH FOR MENU/SELECT control to accept the
selection.

Reference Manual
Rio Rancho, NM 19
STO - Store To
STO is used to copy the contents of the active setup to
a selected memory preset location.
STO is accessed by pressing the appropriate Item
Select Button below the LCD. Rotate the PUSH FOR
MENU/SELECT control to set the value, then, us-
ing the Item Select Button, select “OK.” Finally, press
the PUSH FOR MENU/SELECT control to accept the
selection.
NOTE: STO is typically used the permanently store
changes made to a preset configuration so that they are
not “forgotten” when the device is powered down.
REC - Recall
REC is used to recall an existing preset configuration
from memory.
REC is accessed by pressing the appropriate Item
Select Button below the LCD. Rotate the PUSH FOR
MENU/SELECT control to set the value, then, us-
ing the Item Select Button, select “OK.” Finally, press
the PUSH FOR MENU/SELECT control to accept the
selection.
System Information Screen
The SysInfo screen provides the basic information
about the unit and its present state in the system. This
screen has four sections: firmware version, serial num-
ber, active preset and unit’s placement.
The Active Preset is the last preset recalled; however, it
may not reflect the unit’s current configuration. Changes
to the unit’s configuration may have been made after
the preset was called.
⇓Firmware
Version
Serial
Number
Active
Preset
Unit’s placement in
multiple unit chains
DM’s can be used as stand-alone units or as part of
a multiply unit chain. A unit’s placement as “01 of 01”
indicates that it is a stand-alone system. If a unit is
part of a multiple unit stack, it’s placement in that stack
would be identified – “02 or 03”, “03 of 03”, etc.
Stacking Multiple Units
When two or more units are stacked together, one must
always be configured as MASTER and all others as
SLAVE. (See General Settings, Master/Slave Mode for
setting the appropriate mode.)
In the example, three units are stacked, with the MAS-
TER on top and two SLAVE units below. The MASTER
unit is identified as “01 of 03” in the unit’s placement
section of the System Information Screen. The two
slave units are identified as “02 of 03” and “03 of 03.”
The SysInfo screen is used to verify the correct instal-
lation and wiring of multiple units. At power up, slave
units will wait for a sync signal from the master and then
position themselves in order below the master accord-
ing to their physical position in the chain. Miswiring of
the expansion cables, a bad connection or other prob-
lems will produce an error message on one or more
screens.
Locking Front Panel Controls
The front panel controls can be locked to prevent ac-
cidental configuration changes. When the front panel
controls are locked, pressing any key will result in the
Locked screen being displayed.

DM Series Digital Matrix Processors
LECTROSONICS, INC.
20
The LockSet Setup Screen is passcode protected. This
passcode is required to lock or unlock the front panel
controls.
To open the LockSet Setup Screen, navigate to the
TopMenu, use the PRESS FOR MENU/SELECT con-
trol to highlight LockSet, then press the control to open
the LockSet Setup Screen. The LockSet Setup Screen
that opens depends on whether the panel controls have
been locked, or if they are unlocked.
or
⇓
⇓
Entering the Passcode
A passcode is needed to lock or unlock the front panel
controls. This passcode consists of four Item Select
Buttons with the buttons pressed in a preset sequence.
The factory default passcode is 1,2,3,4, corresponding
to the first four Item Select Buttons reading from left to
right. The passcode can be changed, but must always
consist of a sequence of four numerals from 1 to 6 with
each number representing an Item Select Button.
1 2 3 4
The factory default passcode is 1, 2, 3, 4
from left to right.
Press the Item Select Buttons below the display in the
sequence shown at below to enter the default pass-
code.
After the passcode is entered, four symbols will appear
in the upper right section of the screen to confirm the
button presses. Press the PRESS FOR MENU/SE-
LECT control to accept the passcode.
Passcode Item Select Button
confirmation
Locked/Unlock State
If the passcode is correct the LOCKED/UNLOCKED
state will toggle to the opposite state. If the passcode is
invalid an “Invalid” error message will briefly appear.
Changing the Passcode
The unit comes from the factory with a default passcode
of 1,2,3,4. To change the passcode, navigate to the
LockSet Setup Screen. (It does not matter if the front
panel controls are locked or unlocked.)
⇓
Simultaneously press the BACK and Reserved push
buttons to open the Passcode Change screen. You will
be prompted to enter the existing passcode.
PUSH FOR
MENU/SELECT
BACK
Back Button
Reserved Button
Item Select Buttons
⇓