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
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
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
Broadcast?
Sent from my Adobe Flash and Java challenged iPhone
On Jul 27, 2011, at 3:24 PM, "Nigel A. Gunn, W8IFF/G8IFF" nigel@ngunn.net wrote:
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
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
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
This is an extract from the RR's, with much more not copied here. Got a question? More is available online at the 4U1ITU web site. It's an excellent document with lots from which to learn.
73, art….. W4ART Arlington VA
On 27-Jul-2011, at 03:59 PM, (kp4tr)Ramon Gonzalez wrote:
Broadcast?
Sent from my Adobe Flash and Java challenged iPhone
On Jul 27, 2011, at 3:24 PM, "Nigel A. Gunn, W8IFF/G8IFF" nigel@ngunn.net wrote:
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
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
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
Art. You definitions are correct as stated in the "official" definitions on the ITU website so we have to accept them as correct. However, they are not in agreement with what I learned in telecommunications training back in the 1970s in the UK so perhaps things have changed wrt time.
This discussion has cropped up before and no doubt will again.
On 07/27/2011 09:06 PM, W4ART Arthur Feller wrote:
This is an extract from the RR's, with much more not copied here. Got a question? More is available online at the 4U1ITU web site. It's an excellent document with lots from which to learn.
73, art….. W4ART Arlington VA
participants (3)
-
(kp4tr)Ramon Gonzalez -
Nigel A. Gunn, W8IFF/G8IFF -
W4ART Arthur Feller