I've been remiss in answering some of your questions. You'll either have the start of a pactor type emission or an illegal emission type.
I had this argument several years ago when pactor 3 showed up. If you look at J7D, it is defined as "Single-sideband, suppressed carrier; with two or more channels containing quantized or digital information; consisting of data transmission, telemetry, telecommand. I'm still not sure how pactor 3 got designated as J2D rather than J7D. The only answer I got was that pactor 3 modems are designed to be connected to one computer at a time and the single data stream is multiplexed over all the "tones" that are in use. In other words, the modem itself is not a multiplexing device and there are not "individual" channels for different data streams. It seems to me that if you did the multiplexing in your computer so that you end up with only one data stream and did not dedicate psk channels to a given data channel then you would be ok. This would require some "demuxing" at the far end computer. You'll need to be careful in your design to make sure it doesn't get classed as J7D, which is not allowed on the amateur bands. Jim WA0LYK --- In digitalradio@yahoogroups.com, Alan Barrow <[EMAIL PROTECTED]> wrote: > >""snip"" > > But back to digital radio.... I've got an idea to stack 3 psk > signals together side by side and run in a normal SSB radio. > Multiplex the data across the multiple psk paths. I think that would > be legal, and technically possible. No restriction I see on multiple > transmissions with different data streams. Any single signal meets > symbol rate & bandwidth fcc restrictions even as proposed by the new > petition. Might could even do 4! Or maybe do the same with Pactor 1 > to get ARQ, already looking at the linux source. > > Kind of like the fsk/afsk debate. Is it a different mode if you > can't tell the signal's apart remotely? Turing test for radio. > > That's what I'll move to if we ban the wider data modes. Think it > will work? > > Have fun, > > Alan >
