NEC MT 1020G /820G - Manual (Page 21)

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Ⅵ The Remote Mouse Receiver as a mouse for your computer
Serial cable (supplied)
Ⅵ The Remote sensors on the projector cabinet work as the remote sensor on the
Remote Mouse Receiver
Remote cable (supplied)
Ⅵ
You can daisy-chain as many as five LCD projectors and operate them with the
same remote control. To do so:
1. Turn off your projectors.
2. Use the remote control cables supplied to connect the Remote Control Output of one projector to
the Remote Control Input of the next until all the projectors are connected.
Remote cable (supplied)
Serial cable (supplied)
REMOTE CONTROL output
REMOTE CONTROL input REMOTE CONTROL input
REMOTE CONTROL output
REMOTE CONTROL output
Remote cable (supplied)
Remote cable (supplied)
REMOTE CONTROL input