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I am new to digital modes and have tried using Ham Radio Deluxe, WSJT-X, FLDIGI applications and others but find it frustrating since I don’t have a handle on how the different digital modes look in the waterfall or sound. Are there any sources that identify and/or label a digital mode in the waterfall so I can select he correct mode for decoding purposes. -Duane KD9LIL
Duane,
Here is a pointer, the site has both visual and audio samples for most popular Digital Modes
https://www.hfradio.org.uk/html/digital_modes.html
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73 de kjdb
bammiHello Duane,
The tool Bammi suggests is a good start. I also downloaded a Android phone app called Signal ID that will ID a few signal types.
For signals like FT-8 and others where a large number of signals simultaneous occupy a 3kHz bandwidth it will be hard to identify by sound or waterfall signature. Each signal is only 50Hz wide total with 8 tones and signals can overlap. This will make it nearly impossible to tell the type of signal by sound or waterfall.
A clue from the waterfall is the length of time they transmit. For example FT-8 is about 15 sec, FT4 is 7 sec and WSPR is 2 minutes.
Some signals like RTTY are alone and you can see the two tones and their separation on the waterfall and they have a unique sound. The amount of tone separation in Hz, and number of tones can give you a clue to the modulation type.
Fortunately many of the modulation types generally stick with the band plan so their frequency is a good starting place. I often rely of the frequency tables in WSJT, HRD, etc to identify digital signals.
It is interesting to find new signals.
73,
Hamilton
I too am just getting started and am interested in the digital modes. Planning to string a 10m, 6m, and 2m antenni in my garage attic with a switch.
73,
Kadrmas (KC1MNM)
Amherst, NH
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