![]() ![]() It is up to the operator to make sense of what is shown. It merely makes light and dark marks on the simulated paper strip. The PC program does not attempt to decode the characters as they are received. PC programs simulate the paper strip as bands on the monitor screen. There are variations of this mode but the most commonly used is FELD HELL that used simple On/Off keying to form visible characters by marking dots on a paper tape. This is the nickname of a communications mode invented in 1929 by a German whose last name happened to be Hell.
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