Thanks Joe. That's what I suspected, but its better coming from someone who actually knows.
__________ Dan – K4SHQ -----Original Message----- From: Joe Taylor [mailto:j...@princeton.edu] Sent: Friday, October 13, 2017 10:51 AM To: WSJT software development <wsjt-devel@lists.sourceforge.net> Subject: Re: [wsjt-devel] WSJT-X 1.7.1 r8164 Hi Dan, > I also have a question. The FMT analysis program initially had an > error and referred to bad data. The online manual does say to edit > the fmt.all file and remove bad data. I did that and the analysis ran > without error. I made a judgement call as to what constitutes “bad > data”, in this case anything more than 1.9 deviation was bad. Is > there a better rule of thumb for “bad data”? Happy to hear that you like the new capabilities for Frequency Calibration. As for removing "bad data" from the file fmt.all: with a bit of accumulated experience, your own judgment will continue to be the best guideline. Data in the file look something like this (I have added the headings and separator line): UTC Freq CAL Offset fMeas DF Level S/N (kHz) ? (Hz) (Hz) (Hz) (dB) (dB) -------------------------------------------------------------- 14:35:09 660 1 1500 1500.890 0.890 -11.6 19.2 * 14:35:11 660 1 1500 1500.861 0.861 -16.4 39.7 14:35:13 660 1 1500 1500.859 0.859 -18.7 42.2 For each calibration-station frequency "Freq" (here 660 kHz), the measured audio frequencies "fMeas" and frequency offsets "DF" will typically agree to within 1 Hz or better -- usually *much* better. Delete any outliers. Measurements with estimated S/N less than 20 dB will be flagged with an asterisk. These are worth examining individually, because they might be bad. The one flagged above is OK. -- 73, Joe, K1JT ---------------------------------------------------------------------------- -- Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ wsjt-devel mailing list wsjt-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wsjt-devel ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ wsjt-devel mailing list wsjt-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wsjt-devel
