RST report codes


  1. Amateur Radio RST Signal Reports Guide

    Characteristic

    "R" -- Readability

    "S" -- Strength

    "T" -- Tone (cw signals)

    1

    Unreadable

    Faint

    60 cycle hum, 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 filtering

    5

    Perfectly readable

    Fairly Good

    Filtered rectified a/c but strongly ripple, modulated

    6

    --N/A--

    Good

    Filtered tone, definite trace of ripple modulation

    7

    --N/A--

    Moderately Strong

    Near pure tone, trace of ripple modulation

    8

    --N/A--

    Strong

    Near perfect tone, slight trace of modulation

    9

    --N/A--

    Extremely Strong

    Perfect tone, no trace of ripple or modulation