Arthur Feller, W4ART
afeller at ieee.org
Fri Mar 18 23:49:46 UTC 2016
Seems that many folks need clarification of some common operational terms. Here are definitions from the radio regulations (2012 edition).
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
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.
W4ART Arlington VA
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