And its diplexer and duplexer. On 09-Apr-11 15:15, Anthony Monteiro wrote: > Dear Friends, > > Perhaps this will help clear up the confusion. > > A "diplexor" is a passive device that lets you split > and/or combine signals based on their frequencies. > It does not matter whether the frequencies are close > together or on different bands nor does it matter if > you are using it for transmitting or receiving. > > A diplexor is commonly used in radio and TV broadcasting > to allow two transmitters on different frequencies > to share the same antenna. > > > A "duplexor" is a device that allows both transmitting and > receiving over the same transmission line or antenna. It > may or may not be a passive device and it may or may not > be frequency selective. > > In WWII RADAR systems, a duplexor was used to allow > the transmitter and receiver on the same frequency to > share the same antenna. The duplexor was a waveguide > device that had special gas-filled tubes to quickly > switch the signal direction. > > > A typical ham radio cavity duplexor is used in FM repeater > stations to allow the transmitter and receiver to share > the same antenna. Since it is a passive frequency-based > multiplexor, it is also a diplexor. > > If you used the exact same device to instead connect > two transmitters to the same antenna, it would no longer > be a duplexor but it would still be a diplexor. > > > 73, > Tony AA2TX > > _______________________________________________ > Sent via [email protected]. 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 >
-- 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 [email protected] 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. _______________________________________________ Sent via [email protected]. 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
