The first thing to do if one wants to id a given signal is to learn the distinctions between the most common digital sigs found on hf.
These are going to be fsk, mfsk, and psk for the most part, and can be differentiated by ear easily.
As said, udxf logs can help narrow down what is being heard on what freq.
There are a number of decoders that can do siganalysis automagically, but they're typically beyond hobbyist means. The decoders commonly available to the hobbyist can be of help, however, as you can feed a signal to the decoder and see what pops out, using best guesses for mode, rate, parser, etc. Simply using the fft window and/or phase plot so view a sig can also reveal details. To really tear a signal apart I recommend SA.
These are going to be fsk, mfsk, and psk for the most part, and can be differentiated by ear easily.
As said, udxf logs can help narrow down what is being heard on what freq.
There are a number of decoders that can do siganalysis automagically, but they're typically beyond hobbyist means. The decoders commonly available to the hobbyist can be of help, however, as you can feed a signal to the decoder and see what pops out, using best guesses for mode, rate, parser, etc. Simply using the fft window and/or phase plot so view a sig can also reveal details. To really tear a signal apart I recommend SA.
