Signal Report
| Number | R - Readability | S - Strength | T - Tone |
|---|
| 1 | Unreadable | Faint signal, barely perceptible | Sixty cycle a.c or less, very rough and broad |
| 2 | Barely readable, occasional words distinguishable | Very Weak | Very rough a.c., very harsh and broad |
| 3 | Readable with considerable difficulty | Weak Rough | a.c. tone, rectified but not filtered |
| 4 | Readable with practically no difficulty | Fair | Rough note, some trace of filteringfrequency |
| 5 | Perfectly readable | Fairly Good | Filtered rectified a.c. but strongly ripple-modulated |
| 6 | not used | Good | Filtered tone, definite trace of ripple modulation |
| 7 | not used | Moderately Strong | Near pure tone, trace of ripple modulation |
| 8 | not used | Strong | Near perfect tone, slight trace of modulation |
| 9 | not used | Very strong signals | Perfect tone, no trace of ripple or modulation of any kind |
