While I see a possibility in copying FSK with some coding, or ASK, I don't see how the ear could discern PSK. ASK may be identified as presence or absence of a tone, FSK as the presence of one of two tones, but PSK is the SAME tone, with just key clicks during phase jumps, but with no way for the ear-brain system to tell absolute phase or phase differences with the preceding tone.
Many LF beacons are FSK Morse...so, if a lower speed RTTY existed, it might be copied by ear. Some quick gun might even copy 45 baud RTTY by ear.....!! I am not sure if some old timer has already done that previosly, which it is quite likely. Jose, CO2JA kd4e wrote: >> I have to disagree Gabriel, PSK is a form of modulated coding, just >> as is FSK. CW in its simple form is a carrier that is on or off and >> is a form of digital signal that the brain can decode, such as is >> voice. But PSK, FSK, usally infers a code the brain can't decode. >> PSK and FSK mean Phase and Frequency Shift Keying. > > Interesting question. > > Is it literally "impossible" for the brain to decode PSK or FSK or is > it just really difficult? > > Are there discernible patterns in the tone sequences used or are they > too complex to learn to discern, even if sent very slowly? > > Not important at all, just curious! > > -- > > Thanks! & 73, doc, KD4E ... enjoying a sunny CHRISTmas in Florida :-) > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Thank our brave > soldiers this season: http://www.letssaythanks.com/Home1024.html > <http://www.letssaythanks.com/Home1024.html> > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ URL: bibleseven (dot) > com
