ViewSonic CDM4300R - IR Connection; IR Pass-Through Connection

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3.5. IR connection
DISPLAY 1
[IR IN]
External
IR Receiver
[IR OUT] [IR IN] [IR OUT]
DISPLAY 2
NOTE: This display’s remote control sensor will stop working if the [IR IN] is connected.
3.6. IR Pass-through Connection
DVD / VCR / VCD
(DVD / VCR / VCD)
DISPLAY
[IR OUT]
[IR IN]
Remote Control