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Amateur Radio |
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Amateur Radio RST Signal Reports Guide |
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Characteristic |
"R" -- Readability |
"S" -- Strength |
"T" -- Tone (cw signals) |
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1 |
Unreadable |
Faint |
60 cycle hum,, very rough and broad |
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2 |
Barely readable, occasional words distinguishable |
Very Weak |
Very rough a/c, very harsh and broad |
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3 |
Readable with considerable difficulty |
Weak |
Rough a/c tone, rectified but not filtered |
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4 |
Readable with practically no difficulty |
Fair |
Rough note, some trace of filtering |
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5 |
Perfectly readable |
Fairly Good |
Filtered rectified a/c but strongly ripple, modulated |
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6 |
--N/A-- |
Good |
Filtered tone, definite trace of ripple modulation |
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7 |
--N/A-- |
Moderately Strong |
Near pure tone, trace of ripple modulation |
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8 |
--N/A-- |
Strong |
Near perfect tone, slight trace of modulation |
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9 |
--N/A-- |
Extremely Strong |
Perfect tone, no trace of ripple or modulation |
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Some Materials are Patent Pending |
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