No need to guess or try to write new definitions. Here are definitions accepted by all administrations around the world and included in the radio regulations:
RR 1.125 simplex operation: Operating method in which transmission is made possible alternately in each direction of a telecommunication channel, for example, by means of manual control2. RR 1.126 duplex operation: Operating method in which transmission is possible simultaneously in both directions of a telecommunication channel2. RR 1.127 semi-duplex operation: A method which is simplex operation at one end of the circuit and duplex operation at the other.2 2 1.125.1, 1.126.1 and 1.127.1 In general, duplex operation and semi-duplex operation require two frequencies in radiocommunication; simplex operation may use either one or two. I hope this helps. 73, art….. W4ART Arlington VA http://afeller.us _______________________________________________ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
