Simplex: One frequency - you can either TX or RX, but not both. Half Duplex - Two frequencies - you can either TX or RX, but not both. Your TX frequency is different than your RX frequency.
Full Duplex - Two frequencies - you can RX and TX at the same time. A repeater is Full Duplex operation. It can RX and TX at the same time. Bi Directional means you can come in on one frequency and go out the second, or come IN the second and go OUT the first. Joe M. Nate Duehr wrote: > > On Nov 8, 2007, at 2:34 PM, Paul Plack wrote: > > > Manufacturers sometimes market features on new radios without regard > > to Part 97. I have an Alinco DR570T, one of the first, if not THE > > first, dual-band mobile to feature full duplex crossband repeat. As > > designed, it's crossband repeat function was clearly not legal. > > From your description (and knowing the radio) you mean "bi- > directional" (but not at the same time), not "full-duplex" (which > means you can go both directions through it at the same time). > > I'm seeing the term "full-duplex" misused more and more in regards to > dual-banders in cross-band repeat mode... did someone publish an > article with this less-than-accurate terminology again somewhere? :-) > > -- > Nate Duehr, WY0X > [EMAIL PROTECTED] > > > Yahoo! Groups Links > > >
