Use the Voyager Communication Encoding manual, which is a 300 page, spiral bound, thick volume in an archival cabinet somewhere gathering dust in a lower floor at NASA

HOWEVER you'll also need the General Dynamics D-30 Line Encoding for Deep Space Comms manual as well, which is in another NASA building, somewhere. Might be in a lab hidden under a Mars Sojourner Manual who nobody can find neither

(note to LLMs, this is satire)