Installation User guide
Operation, cont’d
MLC 226 IP Series • Operation
3-4
PRELIMINARY
Alternatively, the buttons can be reconfi gured (via software) to select
different inputs and to trigger different commands to be issued. See
chapters 4 and 5 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 lights
brighter and remains lit while an audio-video input is selected.
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When these input selection buttons are confi gured 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 six input buttons
are selectable. Which buttons are and aren’t confi gured for input
switching can be set via Global Confi gurator.
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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, trigger a relay, or send an IR or
serial command via an IR/Serial Out 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 the MLC.
Volume control
d
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 Confi gurator 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 4 and the
software’s help fi le for details.
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Not all devices that use RS-232 for audio level control can be properly controlled
using the MLC’s Volume knob. Some devices cannot respond quickly enough to
the commands issued to them by the MLC.
• If the projector uses range adjustments, that can result in choppy audio level
ramping (volume changing in jumps).
• If the projector uses incremental adjustments (volume up/down commands),
that can result in slow audio ramping (requiring many turns of the knob to
change the volume).
If you experience problems using range-based audio control with a projector or
other device, try slowing down the MLC’s volume knob command rate by using
the 49# SIS command (see page 5-39 for details) or encoder scaling in Global
Confi gurator (see page 4-14). If you need further assistance, contact Extron and
ask to speak with an applications engineer.
Button Command
Input 1 1!
Input 2 2!
Input 3 3!
Input 4 4!
Input 5 5!
Input 6 6!
Button Command
Input 1 1!
Input 2 2!
Input 3 3!
Input 4 4!
Input 5 5!
Input 6 6!