Yesterday I was observing a signal sounding a type of digital mode with approximately 3.5KHz wide staying there for hours, I made a record and posted in a QO-100 Facebook group asking what it should be? The answer: these were two Free DV signals next to each other and the OMs were testing full-duplex mode using FreeDV.
I just put an advice that the NB tp should not be used for Full Duplex comms (IMHO) for both analog or digital modes, then few people seems to get really annoyed with that advice and most of them declaring their support to type of full-duplex operations, and this is great mode and the future of ham radio etc. So I may be really outdated here but I though that ham radio SAT operations by nature is full-duplex, where you tx in one freq and rx in another, but using just one freq, now it seems the new and modern way to go is to utilize several frequencies at same time for the same QSO, if this is the case please let me know the procedure, like what would be the off-set from one signal to the other, etc. May be the band plan allocation for the NB should be redesigned?
Ed - PY2RN