As soon as radio amateurs establish contact over the radio, they exchange signal reports, typically in the R-S-T format. R-S-T stands for Readability, Strength and Tone, though the last one is meant only for CW signals. The system was developed by Arthur W. Braaten, W2BSR in 1934 and is continuing till date. Readability reports can spread from 1 for an unreadable signal to 5 for a perfectly readable signal. Very often radio amateurs are quite lenient and give readability 5 even if there is great difficulty in copying. Only rarely have I heard people giving a readability report of 4 and hardly do I hear anyone giving reports below that. Read More: [ Ссылка ]

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