Lectrosonics DMPA12 - Manual (Page 17)

DMPA12 Installation Guide
Rio Rancho, NM 17
Front Panel Output Activity Indicators
These indicators reflect activity on the output audio
channels. Useful for setup and troubleshooting, these
tri-color LEDs are interpreted as follows:
• 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 muted using front
panel gain control
• BLINKING ORANGE a fault exists on the output
- check wiring for short circuits, etc.
Output Fault Indications
The outputs are protected from shorts and thermal
overload. When a fault exists, the output will shut down
and the front panel activity LED will blink orange. Faults
are automatically reset and the output restored when
the cause of the fault is removed.
Since the outputs are paired, sharing a common ground
connection, a fault on either output on the connector will
cause both outputs to shut down and indicate on the
front panel LEDs.
Expansion Mode Setup
When installed in a system of one or more DM series
automixers, the DMPA12 must be configured to operate
in Slave mode. However in Slave mode a Lecnet2 de-
vice cannot function as a standalone unit, unconnected
to a system containing a Master device. For this reason
the DMPA12 ships from the factory with the expan-
sion mode set to Master so that it can be operated in a
standalone manner. In this configuration it will capable
of booting up normally so that it can be configured us-
ing the control panel program. Once configured, it will
need to be switched to Slave mode prior to installation
in the Lecnet2 system.
If inadvertently set to operate in Slave mode while being
operated in a standalone manner, the DMPA12 will fail
to boot up, so it is impossible to connect to it with the
control panel in order to reverse the change. Recovery
from this situation is simple. Pressing the recessed but-
ton on the front panel of the DMPA12 will temporarily
set the expansion mode to Master, allowing it to boot
up. At this point the DMPA12 can be set back to Master
mode using the control panel program if desired.
Expansion mode changes do not take effect until power
is cycled on the DMPA12.
Of course, once configured as a Slave and installed into
a system, the DMPA12 boots up normally since it de-
tects the presence of the Master device in the Lecnet2
system.
Choose Device Setup->Expansion Mode from the Menu
Bar. A submenu of choices will open, with a check mark
next to the current value. Use the mouse to select the
desired expansion mode. The change will not take effect
until power is cycled on the DMPA12.
RS-232 Baud Rate Adjustment
The RS232 serial port on the DMPA12 is intended for
use with third party control systems. Since the serial
port capabilities of these systems varies, a means of
changing the baud rate of the RS232 port to match the
control system requirement is provided. This adjustment
affects only the RS232 port.
Choose Device Setup->RS232 Port Baud Rate from the
Menu Bar. A submenu of baud rate choices will open,
with a check mark next to the current value. Use the
mouse to select the desired baud rate. The change will
take effect immediately.