4. Device Concept
IR Interface
ATTENTION! The device has no built-in Infrared receiver and transmitter. For the complete usage attach
the supplied IR emitter unit to the IR OUT and the IR detector unit to the IR IN connectors.
Technical Background
ATTENTION!
The Infrared signal transmission is similar to the serial data communication. The MMX4x2 series matrix
the TPS interface. The signal is in pronto HEX format in both cases.
Block diagram of the IR interface
option is the command injection mode (like at serial interface in the previous section) where you can send IR
INFO: Infra section.
INFO:
Disabling Output Signal Modulation section.
Control by IR Signal - Example
The Concept
An IR detector is attached to the Infrared input port of the Matrix and IR signals are sent by the Remote
controller. A pair of active speakers are also connected to the analog audio output port of the Matrix.
The volume can be controlled via the Matrix by using the remote controller in the following way:
▪ Set an action in Event Manager as follows: if the volume control buttons are pressed on the Remote
controller, it shall increase or decrease the volume of the analog audio port of the Matrix. In this case
you can control the audio device via the Matrix remotely. See the details about the Event Manager
settings in the Event Manager section.
TIPS AND TRICKS:
protocol commands, see the details in the section.
Advanced IR functionality
DIFFERENCE:
With Event Manager (see more details in the Event Manager section)
The code can be saved into an action in the Event manager with the following parameters:
▪ Category: Infra
▪ Expression: Send pronto hex
▪ Port: D1
▪ Pronto hex: <custom_code> .The maximum length of the code can be 184 characters (184 bytes).
With LW3 protocol command (for more information, see the Infrared Message Sending)
Sending Bigger-endian pronto hex code is also available, see the Sending Pronto Hex Codes in Big-endian
Format via IR Port.
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