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Zaphon B. wrote: I made mention of the fact earlier that I was hearing Morse Code that seemed to be transmitted so fast that it was almost like it was some other form of communication. So questions. Are many people out there able to listen and decode that **** on the fly and understand it or are they going through software programs to decode the stuff. There's legacy stuff, like the station IDs and traffic lists from maritime shore stations, the IDs for maritime and aeronautical navigation beacons, and probably tactical military stuff just used for practice. But it's basically obsolete. And hams, of course. But if you can afford a computer to receive it, you can use some other modulation method that's far superior. Most maritime stuff, that hasn't gone to satellite, is TOR (Telex over Radio). If the home office wants to contact a ship at sea that's equipped with an Inmarsat satellite terminal, they just call them on the telephone, send a fax, or an email. AND (I know this will sound stupid) but is there actually someone sitting out there hammering this stuff out by hand, like in the old westerns or is it machine made? They don't use hand keys, there are automatic keyboards, or semi-automatic keyers (buzzword: bugs) that speed things up by timing out the dots and dashes. Or computers. if machine made why? Why are people still sending info with Morse Code? Haven't we sort of moved beyond that, if you know what I mean?? Yup, that's why only hams really still use it. Even 40-50 years ago, most businesses shifted over to using the Telex or TWX services, where an operator in their communication center would send a message on a teleprinter through the world wide telegraph networks or direct dial through the phone system. Even RTTY seems to have gone away. (Radio TeleTYpe). Long before computers ran communications, there were printing telegraph systems. Most commonly (for English) they used a 5 bit code, which sent upper case letter, or the numbers and special characters. (They used codes for shift and unshift, Caps Lock in modern terminology). Sent at, by modern standards, at pathetically slow speeds of 42.something, 50, or 75 bits per second using Frequency Shift Keying. Back 15 or 20 years ago, you could pick up a tweedling signal that jumped between two tones. (received in SSB mode on your receiver). If you had the equipment, a Terminal Unit, (the demodulator half of a modem) and a teleprinter that worked with the code, or later a micro-controller decoder box, or computer with software, you could read, literally, the signals. These included weather reports, (in a cryptic coding system), traffic for telegraph systems (Western Union) between countries that didn't have wire connections (US to Cuba), and news services. The same text that was being printed out in newsrooms at news papers and radio stations around the country was also being sent by shortwave to the more remote subscribers. In the clear. (But, aside from the weather data, none of this stuff was public information. They could go after you for violating regulations or copyright for giving it to a third party). Last time I bothered, all that was out there was the North Korean news service. And the maritime TOR system that links ships to whatever is left of the Telex system. And a lot of encrypted stuff (probably military comms to small bases too small for more reliable and high bandwidth links). Mark Zenier Washington State resident |
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