> Personally, I connect a cable, get my meter out and measure to see
> whether voltage is on pin 2 or pin 3, whichever has ~-10V on it is the
> TX of the device in question.

Unfortunately some receivers seem to put out a respectable negative
voltage unless loaded :(

Wouter van Ooijen

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Van Ooijen Technische Informatica: www.voti.nl
consultancy, development, PICmicro products
docent Hogeschool van Utrecht: www.voti.nl/hvu
 

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