The SCAMP/Winlink 2000 developer plans to eventually release SCAMP and its busy detect software into the GPL someday. It is very low on his priorities since there are few programmers for a closed proprietary system such as Winlink 2000. There is hope that some of the developed software could then be used for amateur digital modes.
SCAMP hopefully will have further development that would enable it to compete more favorably with the Pactor modes that are currently the only ones used on HF with WL2K. It works extremely well with 10 db S/N signals or better. Which one would expect considering that it uses the RDFT modulation that tends to work at that same level. If there was a several step fall back mode, then SCAMP would work better than Pactor 2 most of the time although it would be wider at the higher speeds. It is unfortunate that with all the technical expertise and all the development work done, no one else has come up with a robust (at least -10 or more db S/N and 500 wpm or more speed) amateur ARQ mode that can stay within a voice bandwidth. 73, Rick, KV9U Dave Bernstein wrote: >This looks like another proof that busy detection is feasible with >soundcard software. If you don't mind, Andy, please check its ability >to detect CW and RTTY. > >The difference between asking "is this frequency in use?", >sending "QRL?" in CW, and an ALE sounding is that few human operators >will recognize the latter, much less decode it rapidly enough to >respond. "QRL?" in CW is something that human operators either >already know or could easily learn to recognize; it'd be an effective >way for automatic stations to actively determine whether a frequency >is already in use. > >As for Winlink, most Winlink users employ a TNC that does not support >busy detection. Had SCAMP worked, and had someone developed a forcing >function to drive Winlink users off those TNCs and onto SCAMP, then >busy detection would be available in WinLink too. > > 73, > > Dave, AA6YQ > > > Need a Digital mode QSO? Connect to Telnet://cluster.dynalias.org Other areas of interest: The MixW Reflector : http://groups.yahoo.com/group/themixwgroup/ DigiPol: http://groups.yahoo.com/group/Digipol (band plan policy discussion) Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/digitalradio/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
