Note 1 – The adjacent channel above the given channel is known as the “upper adjacent channel” and the one below it as the “lower adjacent channel”.

Note 2 – Two adjacent channels may have a common part and this may be referred to as frequency overlap.

[SOURCE: ITU-R Rec. 573 MOD]

Note 1 – Le canal adjacent de rang supérieur au canal donné est appelé "canal adjacent supérieur", celui de rang inférieur "canal adjacent inférieur".

Note 2 – Deux canaux adjacents peuvent avoir une partie commune; on parle alors de recouvrement en fréquence ou de canaux partiellement superposés.

[SOURCE: UIT-R Rec. 573 MOD]