Hi Joe Table 2 in 15.2.5 sets out the sensitivity for JT4 prior to the implementation of the variable bin-width procedure. The sensitivity now is that same for all sub-modes of JT4 when the spreading is low. The problem with this table is that some people build beacons with lower sub-modes in the mistaken idea that this will improve the sensitivity when it is generally better at VHF and above to use a wide sub-mode so as to optimise the use of the beacon on aircraft scatter and rain scatter.
I have forgotten now if you ever implemented the variable bin-width procedure on JT65a to c which you were considering at one time. But if you did the same issue applies to JT65. The tables excludes the advantage that is gained from DS. Perhaps where DS is available you might add an asterisk and a note to indicate that up to 3 or 4 dB additional sensitivity can be obtained by using DS. Rex VK7MO ------------------------------------------------------------------------------ The Command Line: Reinvented for Modern Developers Did the resurgence of CLI tooling catch you by surprise? Reconnect with the command line and become more productive. Learn the new .NET and ASP.NET CLI. Get your free copy! http://sdm.link/telerik _______________________________________________ wsjt-devel mailing list wsjt-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wsjt-devel
