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4. Put the MLC Off button that you have just programmed into macro mode by pressing
and holding the button for 3 seconds. The orange LED on the back panel, labeled
“E,” flashes rapidly five times, then turns off, indicating that the button is now
configured for macro mode.
5. Set configuration DIP switch 1 on the MLC rear panel to Off (down).
Now, with one press of the MLC Off button, you can issue the command to projector
off and respond to the projector confirmation prompt. The commands are issued in
succession at 1.5-second intervals.
Application 3: Controlling Projectors That Have Multi-coded IR
Functionality
Certain projectors, such as Philips projectors, have multiple IR codes for the same
function. Projectors with multi-coded IR functionality issue two commands for each IR
remote control button. Command “A” is initiated by the first press of the button; command
“B” is initiated by the second press. Because the buttons on the MLC 52 can store up to
four commands, it is ideal for projectors of this type.
If controlled via RS-232, projectors that have multi-coded IR functions typically have a
specific RS-232 command that selects or performs each desired function. Therefore,
there is no command “A” or “B” for RS-232 control.
This section provides instructions for using IR learning to program multiple input selection
commands onto the MLC 52 buttons from two common types of hand-held projector
remote controls that have multi-coded IR functionality.
NOTE: For best results, select a projector that has a dedicated audio and video input
for each source used in the system. Video and audio should not share an input.
Configuration for a System with a Projector Remote Control Type A
(Application 3)
A type A remote control has a discrete button for each input (see page 34). Two buttons
are designated for RGB inputs, one for S-video, and one for video (composite). Each
of these input selection buttons on the type A remote control has a command “A” and
“B” coded on it. Follow these steps to use IR learning to program the input selection
commands from the projector type A hand-held remote control onto the MLC PC and
Video buttons.
NOTE: When a command has been successfully learned, the IR learning LEDs on
the MLC rear panel flash in rapid progression from top to bottom, then back to top.
Programming RGB inputs — projector remote control type A
1. Place the rear panel configuration DIP switch 1 in the On (up) position to
enable learning mode.
2. Using IR learning, program command “A” from the RGB 1 input selection button on
the projector remote control into memory block 1 of the MLC PC button:
a. Press the PC button on the MLC front panel. The button blinks, indicating that the
MLC is ready to learn the command. On the rear panel, the bottom IR learning
LED should be flashing.
b. Within 5 seconds (while the PC button on the MLC 52 is blinking), press the
RGB 1 button on the remote control. The MLC learns command “A” for RGB 1.
Transmitting MLC
Receiving MLC
1
ON
2 3 4
1
ON
234
1
ON
234
MLC 52 MediaLink Controllers • Special Applications 39