Yes, it is why I included its specification and mentioned signal rate :) I have never heard JTMS on HF, btw..
73, Bill N9DSJ --- In [email protected], "Dave Sparks" <dspa...@...> wrote: > > JTMS is 1500 BPS? Could it exceed the 300 baud limit on a single carrier, > like PSK500 does? That wouldn't strictly be a B/W issue, but it would be a > rule violation on HF. > > -- > Dave Sparks -- AF6AS > > ----- Original Message ----- > From: "n9dsj" <n9...@...> > To: <[email protected]> > Sent: Thursday, July 22, 2010 4:26 PM > Subject: [digitalradio] Re: Question on bandwidth on HF (n9dsj) > > > > > > > > Hi Russell, > > Not sure (I am not the lawyer in my family:) but suspect due to its signal > rate it is legal. I asked the question on the HF JT65 board but no > definitive response. ISCAT is 23 baud at 1500 Hz and JTMS is 1500 bps and > the bandwidth 2250 Hz. You are correct that it may be more of an issue as to > where in the band you were transmitting more so than the legality of its > usage. I am not sure of the advantage of ISCAT on HF, aside from perhaps on > a scatter path to 10/12 meters and it is down 10 dB or so in sensitivity > from JT65/JT8/JT2/JT4 modes; albeit uses a 30 second sequence like JT6M. I > have only previously seen it used on 6 meters and above. Of course some > people simply do not like the wider modes in general, hence the inevitable > controversy. > > 73, > > Bill N9DSJ >
