A trainable transmitter comprises a user interface and a memory. The memory comprises control data configured to control a plurality of remote control devices. The transmitter further comprises a transmitter circuit configured to generate and transmit signals in response to an input received by the user interface and comprises a control circuit. The control circuit is configured to retrieve the control data from the memory in response to actuation of the user interface. The control circuit is further configured to control the transmitter circuit to transmit a plurality of control messages comprising coded transmissions for a plurality of remote control devices. The coded transmissions for the remote control devices are interleaved over a shared temporal period.
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