Test Run Of Programming ; To Be Aired By Channel 51 " A test run of programming is slated to be aired i Monday by Big Sun TV, Channel 51. - Leading off the five-hour broadcast at 4 p.m. Monday will be a special five-minute sign-on dedication program, according to Susan Hrin, station program manager. The dedication will be followed by a half hour of Cable News Network Headline News. A special »Halloween movie feature is scheduled to follow at *4:35 p.m., called “Halloween with the Adams : Family’’. J ' An episode of Dark Shadows is slated to begin at ' 6:05 p.m, with Laugh-In following at 6:30 p.m., ’ Headline News again at 7 p.m. and Barnaby Jones, J in “Anatomy of Fear,” at 8 p.m. ^ Sign off is slated for 9 p.m. The station is scheduled to begin its first broadcasting day at 6 a.m. Tuesday. The station will be carried on Cox Cablevision ' Channel 13. Ms. Hrin said she is uncertain where the ’ station will be seen on the channel selector in other . cable systems in the Big Sun area. “We hope to know by Monday. Several systems said they just haven’t decided yet,” she said.