1 possible way to "know" is if I send the F1 message key. I must have tuned across a clear frequency and decided to CQ for a while. Just a thought from a non-programmer type :-) On Thu, Apr 3, 2008 at 10:31 AM, Paul O'Kane <pokane at ei5di.com> wrote: > > How can SD "know" that S&P is no longer appropriate? > >