[amsat-bb] Re: PSK v. APRS
Nigel Gunn G8IFF/W8IFF
nigel at ngunn.net
Wed Jun 8 06:33:56 PDT 2011
Traditionally, a simplex channel is one that can ONLY receive or transmit but not both, as in a telemetry beacon or a
broadcast radio or TV station.
Half-duplex refers to a channel where both reception and transmission can take place but only one at a time. Your
operation of an FM repeater, for example, is half-duplex although the repeater is actually operating full-duplex on two
Full-duplex refers to a system that receives and transmits simultaneously. A wired telephone and cellphone come into
this catagory as does nost peoples use of a lineat satellite transponder.
On 08-Jun-11 03:33, Justin Pinnix wrote:
> Guess I learned the ITU version :-)
> On Tuesday, June 7, 2011, Nigel Gunn G8IFF/W8IFF<nigel at ngunn.net> wrote:
>> That's half duplex, not simplex.
>> On 07-Jun-11 14:55, Justin Pinnix wrote:
>> A packet satellite can also be operated simplex (TX and RX on the same
Nigel A. Gunn, 1865 El Camino Drive, Xenia, OH 45385-1115, USA. tel +1 937 825 5032
Amateur Radio G8IFF W8IFF (was KC8NHF 9H3GN), e-mail nigel at ngunn.net www http://www.ngunn.net
Member of ARRL, GQRP #11396, QRPARCI #11644, SOC #548, Flying Pigs QRP Club International #385,
Dayton ARA #2128, AMSAT-NA LM-1691, AMSAT-UK 0182, MKARS, ALC, GCARES, XWARN, EAA382.
More information about the AMSAT-BB