le ▁for ▁a ▁secondary ▁affili ation ▁with ▁a ▁full - power ▁television ▁station ▁( which ▁maintain ▁transm itting ▁power ▁as ▁high ▁as ▁ 1 , 0 0 0 ▁kil ow att s ▁and ▁outputs ▁a ▁signal ▁extending ▁as ▁far ▁as ▁ ▁from ▁the ▁transmit ter ▁site ), ▁or ▁an ▁exclusive ▁or ▁primary ▁affili ation ▁with ▁a ▁low - power ▁station ▁with ▁more ▁limited ▁signal ▁coverage ▁( which ▁maintain ▁a ▁reduced ▁transm itting ▁power ▁not ▁exceed ing ▁ 1 0 0 ▁kil ow att s , ▁with ▁a ▁more ▁limited ▁signal ▁radius ▁covering ▁an ▁area ▁ ▁from ▁the ▁transmit ter ). ▁ ▁However ▁unlike ▁in ▁other ▁countries , ▁to ▁ensure ▁local ▁pres ences ▁in ▁television ▁broadcast ing , ▁federal ▁law ▁restrict s ▁the ▁amount ▁of ▁network ▁programming ▁that ▁local ▁stations ▁can ▁run . ▁Until ▁the ▁ 1 9 7 0 s ▁and ▁ 1 9 8 0 s , ▁local ▁stations ▁supp lement ed ▁network ▁programming ▁with ▁a ▁size able ▁amount ▁of ▁their ▁own ▁locally ▁produced ▁shows , ▁which ▁en comp ass ed ▁a ▁broad ▁content ▁spectrum ▁that ▁included ▁variety , ▁talk , ▁music ▁and ▁sports ▁programming . ▁Today ▁however , ▁many ▁( though ▁not ▁all ) ▁stations ▁produce ▁only ▁local ▁news ▁programs , ▁and ▁in ▁some ▁cases , ▁public ▁affairs ▁programs ▁( most ▁commonly , ▁in ▁the ▁form ▁of ▁news ▁and / or ▁political ▁analysis ▁shows ); ▁the ▁remainder ▁of ▁their ▁sched ules ▁are ▁filled ▁with ▁synd ic ated ▁programs , ▁or ▁material ▁produced ▁independently ▁and ▁sold ▁to ▁individual ▁stations ▁in ▁each ▁local