Lab.gruppen LUCIA 120/1-70, Quick Start Manual, Page: 8 / 36

8
Set-up and Operation
Auto Standby / Power-up
LUCIA amplifiers do not have a power switch. The amplifier will turn on
automatically when AC power is connected to the unit; it will go into
standby mode if no signal is present at any input for 20 minutes. When in
standby, the amplifier will power up in two seconds when a signal above
the preset threshold (-54 dBu default) is present at any channel input.
GPIO Configuration: Two Ouput
Low Impedance Models
Default functionality is as described below for General Purpose Inputs and
Output (GPIO).
Remote volume control
– The default functionality for the GPI is
independent control of output volume; please note that this control is in
series with the control of from the front panel. There are two ways to do
this:
• Connect a GPO from a control device that outputs 0 – 3.3 V
– Pins 5 and 6 connect to an internal relay to provide
amplifier fault indication. The relay is closed when the amplifier is on and
operating normally. The relay opens if a fault in either the output channel(s)
or in the power supply interrupts normal operation of one or both channels.
Optional GPIO modes
– The Matrix models allow other GPIO functions to be
enabled by applying changes to the amplifier firmware. See the full Operation
Manual for more information.
for control. Their grounds also need to be connected; see full
Operational Manual for further instructions.
• Connect a remote volume control potentiometer per channel to
pins 1 through 4 of the GPIO connector as shown below.
(The Vcc voltage output is 3.3 V).
– Connect an external contact closure to Ground
and GPI2 as shown in the diagram following. Wake-up happens within 0.5
s after contact closure.
– Pins 5 and 6 connect to an internal relay to provide
amplifier fault indication. The relay is closed when the amplifier is on
and operating normally. The relay opens if a fault in either the output
channel(s) or in the power supply interrupts normal operation of one or
both channels.
Optional GPIO modes
– The Matrix models allow other GPIO functions
to be enabled by applying changes to the amplifier firmware. See the full
Operation Manual for more information.
Individual volume control
R
R
Common volume control
R
GPIO Configuration: Mono High-Impedance
The Default functionality is as described below for General Purpose Inputs
and Output (GPIO).
Remote volume control
– Connect a remote volume control
potentiometer to Ground, GPI1 and Vcc as shown in the diagram
following. Volume control is after input mixing. (The Vcc voltage output
is 3.3 V).
R
DSP/Matrix Configuration
The LUCIA models include a mix matrix and a comprehensive suite
of DSP features. In nearly all applications for this type of amplifier, the
included features eliminate the need for an external mixer or processing
unit. Also, the default DSP and matrix configuration allows “out of the
box” installation with no further configuration required for many typical
applications.
Default preset
– The default matrix and DSP configuration is as follows
for the M models:
SPEAKER 1 = IN 1; volume attenuated with GPI 1 (and front knob)
SPEAKER 2 = IN 2; volume attenuated with GPI 2 (and front knob)
Out 3 = In 1 (-6 dB) + In 2 (-6 dB); volume attenuated with GPI 1
Out 4 = In 1 (-6 dB) + In 2 (-6 dB); volume is not affected by GPI
Software download and installation
– Very intuitive configuration
software is available that allows selection of which preset to use
(optimized for different loudspeakers) and what dynamics processing to
use. This application is available for free download from
www.labgruppen.com/support.
USB connection
– A USB connection is provided for firmware updates
and downloading presets to the LUCIA. For complete information please
refer to the full Operation Manual.
– Please refer to the full Operation Manual for
detailed information on custom configuration of DSP functions using the
LUCIA configuration application.
Third-party control
– The LUCIA models have a built-in RS-232 serial
interface, enabling third-party products to control and monitor LUCIA.
For more information on RS-232 serial interface usage, please refer to the
“LUCIA Serial Dongle – RS-232 Quick Start Guide”, which can be downloaded
from http://labgruppen.com/support/download-quick-start-guide