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

   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 of modulation.
   8 - Near perfect tone, slight trace of modulation.
   9 - Perfect tone, no trace of ripple or modulation of any kind. 

   If the signal has the characteristic steadiness of crystal control, add the letter X to the RST
   report. If there is a chirp, the letter C may be added to so indicate.
   Similarly for a click, add K. The above reporting system is used on both c.w. and voice,
   leaving out the“tone”report on voice.