1x1 WSPR callsigns only decoded by KiwiSDR
I came across an interesting phenomenon recently while running a special event WSPR beacon. Turns out that the 1x1 call sign being used (N1D) was only being spotted by the (older?) decoder built into the KiwiSDR ("1.3 Kiwi"). The decoder used the decoder used in current systems like WSJT-x 2.4, wsprdaemon, etc. Only when I changed the call sign to a compound one (N1D/4) did the spots emerge from
So this is a case where the decoder that comes with the Kiwi has a clear advantage over others, even though it falls a bit short for routine use on a busy band. I posted this same information on other WSPR-related forums; I suspect it is an obscure bug in the decoder software that will be addressed at some point. And since 1x1 call signs are rarely used, it's not surprising if this hadn't been noted previously.