It broadcasts on UHF digital channel 30 , but through the use of PSIP , over-the - air receivers display it as virtual channel 21 .
WCKV - LD is a low - powered television station licensed to and serving Clarksville , Tennessee .
WCKV - LD broadcasts on UHF digital channel 30 , but through the use of PSIP , over-the - air receivers display WCKV - LD as virtual channel 21 .
WCKV - LD is a low - powered television station licensed to and serving Clarksville , Tennessee .