ViewSonic CDE5520 - IR Pass-Through Connection

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