( ( On ( the ( medium ( wave band ) ) ) ) ( this ( ( may ( mean ( ( ( changing ( the ( received ( radio frequency ) ) ) ) ( from ( ( around 600 ) kHz ) ) ) ( to ( around ( 1600 kHz ) ) ) ) ) ) . ) ) )
(ROOT (S (PP (IN On) (NP (DT the) (NN medium) (NN wave) (NN band))) (NP (DT this)) (VP (MD may) (VP (VB mean) (S (VP (VBG changing) (NP (DT the) (VBN received) (NN radio) (NN frequency)) (PP (IN from) (NP (QP (RB around) (CD 600)) (NN kHz))) (PP (TO to) (NP (QP (RB around) (CD 1600) (CD kHz)))))))) (. .)))
On the medium wave band this may mean changing the received radio frequency from around 600 kHz to around 1600 kHz.
(ROOT (S (NP (NNP Am) (NN radio) (NNS waves)) (VP (VBP exist) (PRT (RP in)) (NP (DT the) (ADJP (QP (CD 540) (TO to) (CD 1600))) (NN khz) (NN frequency) (NN range))) (. .)))