WPVI-TV had been broadcasting digital signals on channel UHF 64 from 1998 until 2009, but that channel was recovered by the FCC for resale in March 2008. WPVI-TV was by far the largest urban station to broadcast in the Low-VHF band after the mandatory digital transition in 2009. Next to Philadelphia, the next largest market area served by a major network affiliate with a Low-VHF channel was Las Vegas, served by NBC affiliate KSNV-DT (which shifted their intellectual unit to a new sister UHF station in 2014 when it came under new ownership to address major reception issues). WPVI-DT went back to channel 6, where they had been broadcasting analog signals since 1948. The WPVI-TV signal was difficult to receive with an indoor antenna, even within Philadelphia proper.