SINPO code  -  An explanation of the SINPO code:


I have been thinking about the SINPO code after seeing a station reported as 32331 recently. 
If you look at the table below you will see that an overall figure of 1 in the "overall" column does not equate with the other figures. The correct number would be 2 or 3 depending on the reception. 





Signal Strength
Interference
Noise
Propagation disturbance
(fading)
Overall
5
Excellent
Nil
Nil
Nil
Excellent
4
Good
Slight
Slight
Slight
Good
3
Fair
Moderate
Moderate
Moderate
Fair
2
Poor
Severe
Severe
Severe
Poor
1
Barely audible
Extreme
Extreme
Extreme
Unusable



44444 as a report is clearly a good report. 35433 or 45444 is a good average for many shortwave pirates received at my location. 

Strong pirates and many broadcast stations sometimes go over 9 + 40 db and clearly qualify for 5 in the "S" column. 

I have rarely heard a shortwave station without any propagation disturbance so 4 to my mind is great.

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