Extron Electronics MLC 104 Plus Series - Manual (Page 20)

Operation, Features, and Cabling, cont’d
MLC 104 Plus Series • Operation, Features, and Cabling 2-4
PRELIMINAR
Y
power it off. By default, only one of these two buttons can be selected (active)
at once. Via Global Configurator (GC) software, other functions and relays
can be associated with each of these buttons.
N To avoid conflicts with the front panel lockout PIN feature, Extron recommends
configuring the Display Power buttons so that the MLC sends projector/display
commands upon the button release instead of on the button press.
b
Input selection buttons — These buttons, labeled 1 through 4, can
be configured to perform a variety of functions. Each button can
be configured for input selection and to execute the IR or RS-232
commands of your choice, or trigger event scripts and/or port
monitoring. By default they are a mutually exclusive group: only
one of these buttons can be selected at a time. Also, by default
each button is associated with an Extron input switching Simple
Instruction Set (SIS ™ ) command (1!, 2!, 3!, and so forth) and
bidirectional communication via the MLC’s MLS RS-232 port. See
the picture at right.
Alternatively, the buttons can be reconfigured (via software) to
select different inputs and to trigger different commands. See chapters 3 and
4 for details.
Press an input selection button to select the desired audio and video input
on the projector or an optional Extron switcher. The button for that selection
lights brighter and remains lit brighter until a different input is selected.
N When these input selection buttons are configured for input switching, there is a
default 0.5 second delay between when one input is selected and when a different
input can be selected. This allows time for the projector to adjust to the change
of sync signals. The delay period is adjustable.
If the MLC is used without an optional switcher and the MLC has been set up
for use with a projector, the selectable inputs on the MLC correspond to the
number of inputs available on the projector. If an optional Extron switcher is
connected to the MLC, all four input buttons are selectable. Which buttons
are or aren’t configured for input switching can be set via Global Configurator.
N When an input selection button is designated for input switching, pushing that
button causes the MLC to send out an SIS input change command via the MLS
RS‑232 connector. In addition it can make the MLC send projector control
commands through the Display RS‑232/IR port, send a digital output signal, or
send a serial command via the MLS RS‑232 port.
The default Extron SIS commands sent for each input via
the MLS connector are shown at right. If desired, you
can reassign (remap) any input from 1 to 99 to these
input buttons. Button remapping can be convenient if a
switcher is slaved to (controlled by) the MLC.
Volume control
c
Volume knob and LEDs — Rotate this knob clockwise to increase the audio
volume, counterclockwise to decrease volume. Volume can be adjusted via
this front panel knob, the corresponding knob on an SCP control panel, the
Volume up/down buttons on an IR 402 remote control, or via RS-232/Telnet/
Web browser control.
The Global Configurator software lets you select whether this knob controls
the projector’s audio levels or the optional switcher’s audio levels. If the knob
controls the projector’s audio levels, you can specify incremental adjustments
or range-based adjustments (via device driver only). See chapter 3 and the
software’s help file for details.
1!
2!
3!
4!
1
2
3
4
Button Command
Input 1 1!
Input 2 2!
Input 3 3!
Input 4 4!