No, that's incorrect. The preamble is used to denote the start of a frame. It's used by the receive circuit to sync to - i.e it derives its clock from those pre

No, that's incorrect. The preamble is used to denote the start of a frame. It's used by the receive circuit to sync to - i.e it derives its clock from those preamble bits. It's also how the receiver distinguishes between a frame an noise.