This read-create object selects the duration category, from very short to long, of the OFDM burst used at the physical layer for this modulation profile, which also determines the MAC mini-slot duration, with exact durations being hardware and implementation dependent. Admins are advised by the description to consult the specific ODU's capabilities before choosing a setting, since not every ODU supports every option. For example, an admin deploying a new radio unit would check its supported burst lengths before setting cwdIfModBurstLength, since setting an unsupported option could leave the modulation profile unusable on that hardware.