Hi Rick KH2DF, The -110 (8PSK) 3kHz bandwidth format can run in a slow mode at 75bps for around -10dB SNR. That isn't fast enough for much email, but does OK for simple text. The ham radio (6PSK) 2.5kHz bandwidth adaptations of this format are fairly similar, when running at the slow baud. The -141 ALE (8FSK) 2kHz bandwidth format does 375bps at around -4dB SNR. This is the one that is presently being deployed by the ham HF Network.
Bonnie KQ6XA --- In digitalradio@yahoogroups.com, "r_lwesterfield" <[EMAIL PROTECTED]> wrote: > > My Rockwell ARC-190 v8 HF radio and a Rockwell Q9600 modem at "the office" > into the SCOPE Command network works very well for e-mail INTERNET access > but I do have access to 3khz wide channels. This is military hardware > (spelled expensive!!) but it does work and I have seen 8 kbps out of a > theoretical 9.6 kbps max running the STANAG 4539 single tone protocol. I > have seen it hang in there at maybe 300 bps as low as -4 db SNR but no lower > - it just falls apart after that. Thus, it does work for some of us and > these terms are Google-able if you want more information. > > > > Rick - KH2DF
