1			     2			      3 			      4 			     5
-----------------------------------------------------------------------------------------------------------------------------------------------------------------
S :signal	| very low (<15dB)	| low (>15dB)		| mean (>30dB)		| fair (>45dB)		| very good (>60dB)
              	|    			|			|			|			|
I : interferen-	| very strong (0dB)	| strong (-10dB)     	| moderate ( - 20dB)	| light (-30dB) 		| excellent (-40dB)
		|			|			|			|			|
N:  noise	| very high (0dB)	| high (-10dB)		| moderate  (-20dB)	| light (-30dB) 		| excellent (-40dB)
		|			|			|	 		|			|
P: Propagation	| extreme		| strong			| moderate		| light			| nil
    disturbance	|			|			|			|			|
F: fadings	| >60 p.m.		| 20..60 p.m.		| 5..20 p.pm. 		| 1..5 p.m.		| 0..1 p.m. 
		|			|			|			|			|
E: modulation	| very bad		| bad 			| mean  		| fair			| excellent
     quality 	|			|			|			|			|
M: modulation	| overmodulated	| low or null		| mean			| fair			| max                    
     deepness	|			|			|			|			|
O: Overall	| unusable 		| poor			| mean			| fair			|excellent
     quality