Dm84 Controls And Features; Front Panel; Usb Port; Mode Switch - Lectrosonics DM84 Reference Manual

DM84 Digital Matrix Processor

DM84 Controls and Features

Front Panel

DM84 - 8 inputs, 4 outputs
Gain Control

USB Port

Standard USB connector for setup and control of the
DM from a Windows 2000 or Windows XP computer
system with USB interface.

MODE Switch

If a unit configured to run in a slave mode doesn't
detect a master unit on powerup, it will refuse to boot
and the Status LED will blink rapidly. In this case,
pressing the MODE switch will force the unit to boot up
temporarily as a master to allow settings to be exam-
ined or changed. Cycling the power returns the unit to
the slave mode.
Pressing and holding the MODE switch while powering
up the unit places it in Software Update mode. The
Status LED will blink slowly once a firmware update is
initiated, then goes out when the process is completed.
Cycling the power exits the Software Update mode and
returns the unit to normal operation.

Front Panel Gain Controls

The gain of input and output audio channels is adjust-
able from the front panel of the DM84. This feature is
useful for system setup and adjustment, and may be left
enabled to allow users to "touch up" gains as needed
during operation.
Gain can be increased or decreased within a range
which is centered around 0 dB (unity) gain. The mini-
mum gain position has a special meaning - the channel
will be turned "off" when the control is rotated to the
fully counter-clockwise position. The range of adjust-
ment for each channel is individually programmable
using the Control Panel GUI GUI (in Device Setup
Menu) or Lecnet2 serial commands. Changes made to
the gain range settings take effect immediately and are
global in scope - the same settings are in effect no
matter what memory "preset" is loaded. The default
range is 30 dB (+/- 15 dB).
Any or all of the front panel gain controls may be
"locked out" to prevent unauthorized changes to the
system. This is also done using the Control Panel GUI
(in Device Setup Menu) or Lecnet2 serial commands.
Changes made to the gain control lock settings take
effect immediately and are global in scope - the same
settings are in effect no matter what memory "preset" is
loaded.
14
Activity Indicator MODE switch USB Port
NOTE: When the Front Panel Mute feature is
enabled, the minimum gain position has a special
meaning. The channel will be muted and the
associated activity indicator will blink RED to warn
the user that no audio is being passed. This
feature can be controlled using the supplied GUI
control panel or the serial command "fpmten."
Front Panel Input/Output Activity Indicators
These indicators reflect activity on input and output
audio channels. Useful for setup and troubleshooting,
these tri-color LEDs are interpreted as follows:
Input channels:
DARK channel is inactive
GREEN audio present (level greater than -35 dBu)
ORANGE input compressor is active
RED input is in clipping (overdriven)
BLINKING RED input has been turned off using
front panel gain control
Output channels:
DARK channel is inactive
GREEN audio present (level greater than -35 dBu)
ORANGE output compressor is active
RED output is in limiting
BLINKING RED output has been turned off using
front panel gain control
The gain of input and output audio channels is adjust-
able from the front panel of the DM84. This feature is
useful for system setup and adjustment, and may be
left enabled to allow users to "touch up" gains as
needed during operation.
Gain can be increased or decreased within a range
which is centered around 0 dB (unity) gain. The range
of adjustment for each channel is individually program-
mable using the Control Panel GUI (in Device Setup
Menu) or Lecnet2 serial commands. Changes made to
the gain range settings take effect immediately and are
global in scope - the same settings are in effect no
matter what memory "preset" is loaded. The default
range is 30 dB (+/- 15 dB). When the Front Panel Mute
feature is enabled, the minimum gain position has a
special meaning (see note above).
POWER On/Off Switch
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