Yep, I was aware of the 97.221 limit of 500 Hz for automatic operation. Also, I was aware of 97.305 that specifies 300 baud below 28 MHz. 1200 baud appears to be OK for 10 meters. Of course, that is the paragraph that has the confusing thing about 1000 HZ RTTY shift specification. By that I would guess that bandwidths up to at least 1000Hz should be legal. The confusing part is the 500 Hz thing in 97.3(c)(2) that does not appear to be referring to automatic operation. Am I missing something that mentions 1600 Hz bandwidth or is that a theoretical 300 baud, 1000 Hz shift RTTY bandwidth?
Gary - N0GW --- In digitalradio@yahoogroups.com, Rick Westerfield <r_lwesterfi...@...> wrote: > > Look at Part 97.221. This 500 hertz va 1600 hertz bandwidth thing is an > automatic control (unattended - 500 hertz) or attended 1600 question. > > I think you must be thinking about the 300 baud limit and blurring the two > together. And no, I have no other FCC guidance on the matter. > > Rick - KH2DF > > Sent from my iPhone > > On Jan 15, 2010, at 3:27 PM, "Gary" <grwes...@...> wrote: > > I'm interested in having this clarified. 97.3(c)(2) says something about 500 > Hz bandwidth below 30 MHz. That is the only thing I specifically see about > bandwidth for data modes. I kinda read that as saying we here in the US are > limited to 500 Hz bandwidth. Does anyone have an "official" clarification on > this from the FCC. > > Gary - N0GW > > --- In digitalradio@yahoogroups.com, "expeditionradio" <expeditionradio@> > wrote: > > > > MT63-1000 can be used on any HF band and on 160 meters. > > There is no bandwidth limit for Data for USA hams on HF. > > MT63=1000 also complies with the 300 symbol per second rule. > > > > 73 Bonnie KQ6XA > > > > > Kim W4OSS wrote: > > > For US amateurs can MT63-1000 be used below 28MHZ or only above. > > >
