A little more info from you would help! What make and model & yr RV, TV, Ant, Selector switch, ect.
Some RVs have the BOMB (box of many buttons) some just have the Ant Booster box (the light needs to be off for cable).
04 Horizon QD, 12 Ford Flex, Excalibar, Brakemaster, Winter Texan, RVin! since 1974
Norm, Donna & Tinker Kat(RIP) 01 Z3
Life is a Timed Event, you only get One Go Around!