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Note that in a ham radio setting, morse code is only part of the equation. The conversations typically follow patterns that aren't very readable, even when tran

by exitb 4y ago

Note that in a ham radio setting, morse code is only part of the equation. The conversations typically follow patterns that aren't very readable, even when transcribed to ASCII. http://lidscw.org/resources/cq-qso-template http://lidscw.org/resources/cq-qso-template

csdvrx 4y ago
This is because there're different levels: they are similar to EOL, LF and EOF. From http://lidscw.org/resources/cq-qso-template http://lidscw.org/resources/cq-qso-template > There are three in general use: AR signifies the end of the message, KN marks the end of your transmission and an invitation to the other station to reply, and SK says it’s the end of the contact and your last transmission to that station See this nice discussion on the nature of morse: https://cs.stackexchange.com/questions/39920/is-morse-code-binary-ternary-or-quinary https://cs.stackexchange.com/questions/39920/is-morse-code-b... > TLDR: We can thus conclude that the Morse code can be understood, and easily analyzed, as the composition of a prefix binary encoding of a 3 symbols alphabet {dot, dash, sep} into a binary alphabet, and a prefix encoding of a 58 symbol alphabet (57 characters and one space) into the 3 letters alphabet. > The composition itself is a prefix encoding of the 58 symbols into a binary representation. Check this part: > However, some people would be inclined to recognize the space DET at level 2, thus making the alphabet quaternary, then using it directly at level 3, encoded as itself in level 2. > This would meet the standard definition, for DET encoded in binary as 0000. But it would prevent the analysis of the binary encoding C2→1 as a prefix code, making it harder to show that CMorse is a prefix code, hence unambiguous. In your link, AR, KN and SK can be considered in a similar way, but applied to the decoded message.
srvmshr 4y ago
While training for Amateur radio license, I came across interesting things which I hadn't observed before, mainly to do with the ProSigns (like the SOS °°°---°°°) * There is no word in English dictionary with HH (°°°° °°°°). Hence it's a code to indicate scratch the last word. * The washing machines & microwaves of many manufacturers often beeped AS (°-°°° i.e. Wait) in Morse when they were done, to indicate machine is "standing by"
- gorgoiler 4y ago
  *withhold the last word?
- HoraceSchemer 4y ago
  > There is no word in English dictionary with HH (°°°° °°°°). Beachhead
  - jshprentz 4y ago
    >> There is no word in English dictionary with HH (°°°° °°°°). > Beachhead Also bathhouse, fishhook, hitchhike, roughhouse, and withhold.
  - Twisol 4y ago
    More commonly, "uhh", "ahh", and "ehh" (and their elongations) -- though I imagine their function is either fulfilled in other ways in Morse (prosigns?) or simply not needed.
    - srvmshr 4y ago
      My reference was towards unconjugated words. GP posted 'beachhead' - which is a colloquially derived American English word by conjugation of two common English words. Normally you don't see conjugated or stretchy words in amateur radio to facilitate esse. So Simple Wikipedia level of vocabulary, having words which are rather unambiguous to all English speakers. Outside of US, I am sure most people will pause to grasp whats a beachhead. Over HF your taps can be heard half way around the globe. Its considered good manners to be clear & concise 'Ahh uhh' etc aren't useful in a mode of telegraph communication which is rather very terse & commonly does not even include is/are/and etc in transmission. Pithy sentences relaying the content matter is encouraged - to speed up typing & also not to block useful airwave. Most HAMs are sharing a narrow set of channels & only one operator pushes-to-'talk' at any given time
      - Twisol 4y ago
        That's totally fair! It sounds like these words simply aren't used in Morse communication, which seems reasonable due to its purpose. I imagine HH as a prosign is also fairly unambiguous in grammatical context, even if someone did need to key it as part of a word.

by exitb 4y ago

csdvrx 4y ago

This is because there're different levels: they are similar to EOL, LF and EOF. From http://lidscw.org/resources/cq-qso-template http://lidscw.org/resources/cq-qso-template > There are three in general use: AR signifies the end of the message, KN marks the end of your transmission and an invitation to the other station to reply, and SK says it’s the end of the contact and your last transmission to that station See this nice discussion on the nature of morse: https://cs.stackexchange.com/questions/39920/is-morse-code-binary-ternary-or-quinary https://cs.stackexchange.com/questions/39920/is-morse-code-b... > TLDR: We can thus conclude that the Morse code can be understood, and easily analyzed, as the composition of a prefix binary encoding of a 3 symbols alphabet {dot, dash, sep} into a binary alphabet, and a prefix encoding of a 58 symbol alphabet (57 characters and one space) into the 3 letters alphabet. > The composition itself is a prefix encoding of the 58 symbols into a binary representation. Check this part: > However, some people would be inclined to recognize the space DET at level 2, thus making the alphabet quaternary, then using it directly at level 3, encoded as itself in level 2. > This would meet the standard definition, for DET encoded in binary as 0000. But it would prevent the analysis of the binary encoding C2→1 as a prefix code, making it harder to show that CMorse is a prefix code, hence unambiguous. In your link, AR, KN and SK can be considered in a similar way, but applied to the decoded message.

srvmshr 4y ago

While training for Amateur radio license, I came across interesting things which I hadn't observed before, mainly to do with the ProSigns (like the SOS °°°---°°°) * There is no word in English dictionary with HH (°°°° °°°°). Hence it's a code to indicate scratch the last word. * The washing machines & microwaves of many manufacturers often beeped AS (°-°°° i.e. Wait) in Morse when they were done, to indicate machine is "standing by"

gorgoiler 4y ago
*withhold the last word?
HoraceSchemer 4y ago
> There is no word in English dictionary with HH (°°°° °°°°). Beachhead
- jshprentz 4y ago
  >> There is no word in English dictionary with HH (°°°° °°°°). > Beachhead Also bathhouse, fishhook, hitchhike, roughhouse, and withhold.
- Twisol 4y ago
  More commonly, "uhh", "ahh", and "ehh" (and their elongations) -- though I imagine their function is either fulfilled in other ways in Morse (prosigns?) or simply not needed.
  - srvmshr 4y ago
    My reference was towards unconjugated words. GP posted 'beachhead' - which is a colloquially derived American English word by conjugation of two common English words. Normally you don't see conjugated or stretchy words in amateur radio to facilitate esse. So Simple Wikipedia level of vocabulary, having words which are rather unambiguous to all English speakers. Outside of US, I am sure most people will pause to grasp whats a beachhead. Over HF your taps can be heard half way around the globe. Its considered good manners to be clear & concise 'Ahh uhh' etc aren't useful in a mode of telegraph communication which is rather very terse & commonly does not even include is/are/and etc in transmission. Pithy sentences relaying the content matter is encouraged - to speed up typing & also not to block useful airwave. Most HAMs are sharing a narrow set of channels & only one operator pushes-to-'talk' at any given time
    - Twisol 4y ago
      That's totally fair! It sounds like these words simply aren't used in Morse communication, which seems reasonable due to its purpose. I imagine HH as a prosign is also fairly unambiguous in grammatical context, even if someone did need to key it as part of a word.