On 01/01/2016 15:36, Barry Jackson wrote: > Not sure if this is related, but I am testing 6330 in WSPR mode and I am > seeing triple decodes of strong signals the main one and then two others > at approx +/-30Hz about 25dB down e.g.: > > 1504 -21 -0.9 7.040038 0 DF2JP JO31 30 417 > 1504 7 -0.9 7.040070 1 DF2JP JO31 30 417 > 1504 -19 -0.9 7.040101 -1 DF2JP JO31 30 417 > > I appreciate that this may be due to my settings, but I don't recall > seeing this with 1.6.0 and kvasd. > > Maybe this decoder is hearing sprogs that the old one could not detect ;) > > Barry
Hi Barry, WSPR mode in the WSJT-X development branch is virtually unchanged from the v1.6.0 GA release. Also KVASD has no bearing on WSPR decodes. Multiple decodes are invariably due to spurious mixing products either at the Tx station or the receiving station in the baseband audio domain i.e. not related to software. Given that your case reports DF2JP spurii down by >30dB below his main signal; I would not worry too much. The ~31Hz spacings are unusual, more commonly 2*local line frequency mixing products (100Hz/120Hz) are far more prevalent due to PSU ground return issues. 73 & HNY Bill G4WJS. ------------------------------------------------------------------------------ _______________________________________________ wsjt-devel mailing list wsjt-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wsjt-devel
