Tone
The T stands for "Tone". Tone is used only used in Morse code and digital transmissions and is therefore omitted during voice operations. With modern transmitter technology, imperfections in the quality of the transmitter modulation that can be detected by humans are rare. Tone is measured on a scale of 1 to 9.
- Sixty cycle a.c or less, very rough and broad
- Very rough a.c., very harsh and broad
- Rough a.c. tone, rectified but not filtered
- Rough note, some trace of filtering
- Filtered rectified a.c. but strongly ripple-modulated
- Filtered tone, definite trace of ripple modulation
- Near pure tone, trace of ripple modulation
- Near perfect tone, slight trace of modulation
- Perfect tone, no trace of ripple or modulation of any kind
Read more about this topic: RST Code
Famous quotes containing the word tone:
“Whose are the truly labored sentences? From the weak and flimsy periods of the politician and literary man, we are glad to turn even to the description of work, the simple record of the month’s labor in the farmer’s almanac, to restore our tone and spirits.”
—Henry David Thoreau (1817–1862)
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—James Boswell (1740–1795)