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#4
September 18th 06, 11:34 PM
posted to rec.aviation.owning
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Aircraft systems RS232 voltage levels?
Tauno Voipio wrote: .... Is the idle line up or down? Down, which I think you are saying means that the signal I see is the same polarity as full-blown RS232 levels, but the amplitude is reduced to only 4V p-p. (0 to 4V). Obviously, the trip point of the receiver of such a reduced amplitude signal would have to be at about 1.5V (TTL like). Thanks, 
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