Speed adjustment is set by a potentiometer to the sending speed of the morse or alternatively the unit can be set to automatic mode. Maybe a simple graphical indication of the CW detection (slice) level could be provided to help fine tune reception. Using a microphone module connected to an Arudio nano, recieved pulses of morse code are convereted to plain text and and displayed on a 20x4 LCD module. I suspect that some software tweaking of the level into the decoder may be required to optimise the extension. Reducing the AGC delay to 50ms also helps with fading signals. El receptor tambiénpuededecodificar números de código Morse con estaherramienta. A lot depends upon the noise floor of the KiWi in use. Si ha recibido un textoencódigo Morse cifrado y no puededecodificarlo, o estádemasiadoocupado para decodificarlomanualmente, use la herramientadecodificador de código Morse en. Too low a threshold produces too much background noise and generates garbage like strings of EEEEEEEE and too high a level results in only decodes from very strong signals. I've been experimenting with the KiWi extension and have found that selecting a narrow <50Hz CW bandwidth and then adjusting the AGC threshold for best results seems to be quite effective. I can decode most morse signals reasonably well if they register >S4 on the signal strength meter, I suspect that CwGet performs slightly better because it has more user adjustments to play with. This is probably the simplest decoder possible, and thus its logic. I'm not quite sure what level of performance folks were expecting for 'free' ? Rostislav Persion wrote a simple Morse Code decoder to run on his Arduino and display the text on an LCD shield.
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