SINPO code
Appearance
SINPO or SINPO code is a code used to describe the quality of radio transmissions, especially in reception reports. Each letter of the code stands for a specific factor of the signal, and each item is graded on a 1 to 5 -scale (where 1 stands for very bad and 5 very good).
Code explanation
S: Signal
I: Interference
N: Noise
P: Propagation
O: Overall