[amsat-bb] Re: simplex/duplex terminology

[Nigel A. Gunn, W8IFF/G8IFF]

Art...
What's the definition then of a one way only link, as in a TLM channel 
or beacon?


On 07/27/2011 06:54 PM, W4ART Arthur Feller wrote:
> 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
>
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