On 6/10/2013 10:28 PM, Richard Fjeld wrote: > Phil, > > You said: "Even into today, HF marine safety and press bulletins and > traffic are transmitted in > upper case because Baudot and SITOR RTTY use International Telegraph > Alphabet Number 2 which does not have lower case."
> I'm having a problem with this. I had a Baudot machine, and as I > remember it, we sent either an upper, or a lower, case signal > (character) to place the machine at the far end in that case position > and it would stay there until we sent a corresponding character to > change it back again. You may have been confusing that with the "Letters" / "Figures" shift. The "Figures" case contains the numbers and certain punctuation marks and control codes, but no lower-case letters. Occasionally my PK232 decodes the beginning of the USCG HF SITOR/GMDSS marine safety bulletins incorrectly by shifting into the Figures case, and it stays there until a genuine number is sent followed by a Letters Shift character. I have become used to that and mentally decode :1 :1 :1 @3 ,.: ,.: ,.: 464646 as CQ CQ CQ DE NMC NMC NMC RYRYRY (NMC is the USCG Communications Area Master Station Pacific in Pt. Reyes, CA). Applicability to Elecraft -- "RTTY" is sent in ITA2 as is AMTOR, both of which are receivable with the K-2/K3/KX3 transceivers. If the received copy is garbled, it's probably because of a loss of a needed LTRS shift character or a false FIGS shift character. > I'm not familiar with ITA Number 2. Baudot was a > five bit code (plus a stop bit) for 32 characters. That was long ago. ITA2 is the correct nomenclature for what we amateurs call "Baudot". It's still in use worldwide with SITOR (commercial version of AMTOR) as part of the Global Maritime Distress and Safety System (GMDSS). With the general coverage receiver option of the K3 one can discover a lot more out there other than on the ham bands. For further into on the evolution of ITA2 see the Wikipedia listing for "Baudot Code". 73 de K2ASP - Phil Kane Elecraft K2/100 s/n 5402 >From a Clearing in the Silicon Forest Beaverton (Washington County) Oregon ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
