N 2 V L S
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Readability - Signal strength - Tone



Readability


1 - Unreadable
2 - Barely readable, occasional words distinguishable
3 - Readable with considerable difficulty
4 - Readable with practically no difficulty
5 - Perfectly readable


Signal strength

1 - Faint signal, barely perceptible 2 - Very weak signal 3 - Weak signal 4 - Fair signal 5 - Fairly good signal 6 - Good signal 7 - Moderately strong signal 8 - Strong signal 9 - Extremely strong signal


Tone

1 - Sixty cycle a.c. or less, very rough and broad 2 - Very rough a.c. , very harsh and broad 3 - Rough a.c. tone, rectified but not filtered 4 - Rough note,some trace of filtering 5 - Filtered rectified a.c.but strongly ripple-modulated 6 - Filtered tone, definite trace of ripple modulation 7 - Near pure tone, trace of ripple modulation 8 - Near perfect tone, slight trace of modulation 9 - Perfect tone, no trace of ripple or modulation of any kind


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