User Manual
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 Smart Port (S. Port) is a signal wire full duplex digital transmission interface developed by FrSky 
Electronic Co., Ltd. All products enabled with Smart Port (including XJT module, XSR,X6R and X8R receiver, 
new hub-less sensors, new Smart Dashboard, etc), serial port user data and other user input/output devices 
can be connected without limitations for numbers or sequences at a high transmission speed.
Inverted S.Port signal
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