So, I can't talk and listen at the same time, which is simplex, but the guy at the other end of the satellite knows what he's doing and can talk and listen at the same time, which is duplex, therefore we are doing semi-duplex. I think that's what I said before, but I deleted that stuff already.

Steve AI9IN

On 2016-03-18 19:49, Arthur Feller, W4ART wrote:

Hi!!

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 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

To thrive in life, you need three bones: a wish bone, a back bone, and a funny bone.

• Reba McEntire

http://afeller.us [1] <http://afeller.us/ [2]>

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