What is the difference between Frequency Range, IBW and OBW?

Hello dear Experts,

What is the difference between Frequency Range, IBW and OBW?

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Frequency Range: IBW and OBW refers to bandwidth defined by the frequency range within which the RU can be operated, defined by the band-pass filter of the BS, e.g. 3.4 – 3.8 GHz (400 MHz)

In all cases: Frequency Range > IBW > OBW