Of course it's not the full 3 kHz but a couple of hundred Hz less than that. VARA uses OFDM I believe and varies the mode on each of the carriers to maximise speed over the full channel. ARDOP has various BW modes such as 500Hz, 2500 Hz and negotiates the lower of the two stations.
Cheers, Gerard - VK2IO On Tue, 30 Apr 2019 21:25 Bill Somerville, <g4...@classdesign.com> wrote: > On 30/04/2019 11:52, Gerard Hill wrote: > > Apologies in advance if we clobber your traffic. 7045 USB is used > > internationally for VARA and ARDOP modes. These are high speed, > > channel adaptive data modes with up to 3 kHz BW centred on 7046.5. > > > > Cheers, > > Gerard - VK2IO > > Hi Gerard, > > a 3kHz bandwidth signal in that section of 40m is not compliant with the > band plans in any IARU region as far as I can see. > > 73 > Bill > G4WJS. > > > > _______________________________________________ > wsjt-devel mailing list > wsjt-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/wsjt-devel >
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