Live coverage of Sunday's debate involving six Democratic candidates for president will be carried from 6:30 p.m. to 8 p.m. exclusively on NBC (WMAR-TV, Channel 2, locally). It will be simulcast on National Public Radio, carried in this area on WAMU-FM (88.5) and WJHU-FM (88.1).

The 90-minute session from a Washington studio will be moderated by Tom Brokaw, the sole questioner. The format will cover foreign and domestic issues, addressed by the declared Democratic candidates: Edmund G. Brown Jr. of California, Bill Clinton of Arkansas, Tom Harkin of Iowa, Bob Kerrey of Nebraska, Paul Tsongas of Massachusetts and L. Douglas Wilder of Virginia.

NBC's solo coverage is the result of an agreement among the broadcast and cable networks to rotate coverage of the four debates. Dates and coverage arrangements for the other three have not yet been set.