It's harder to reliably use a time-based coding. It's very simple for a component like a 567 or the VLSI equivalent to lock to a tone and recognize that it is or isn't there likewise for an FFT implementation. That's why pretty much all of the popular digital modes are based on frequency shifting, phase shifting, or multiple tones. "I think you'll find that it's difficult for machines to accurately decode codings based only on on/off timing. KK5JY posted a question in QRZ forums a while back, wanting to use an A1B mode (on-off-keying intended for a automatic reception) that would be compatible with any CW radio. It works best when decoding code that was machine-sent.īob, I'd recommend you get RTTY or PSK-31 working on your Arduino before you even think about writing a CW decoder. As Jeff said, CW is notoriously hard for machine decoding. Which is probably why modes like RTTY exist. This email has been checked for viruses by Avast Programming skills, however minimal they may be. Micro class and I don't want to lose my hard-earned Machine with a couple timing loops and (for instanceįor RTTY) some way of measuring the audio input andĪny suggestions? It's been almost 2 years since my Know of a good beginner's book or some other online I wonder if some of you folks who ARE programmers Programming I have had no formal training and I am the first to admit I'm a real n00b at It got me to thinking about doing something similarįrom scratch here, maybe not for Navtex but Wrote: Just saw a neat project for a Navtex
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