Marantz RX7001 Mode D'emploi page 12

How to Install the RF Extender
2 Attach the Dual IR emitters to a neighboring surface facing the
IR receiver (for aesthetic purposes or when it is difficult to locate the
IR receiver).
– OR –
Attach the Dual IR emitters directly to the IR receivers of the
audio/video devices.
Make sure the Dual IR emitters are connected properly and that they are placed
within range of the IR receivers.
User Guide
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