WCSH's digital signal on UHF channel 44 signed on in 2002, bringing high definition network television to the area. WCSH's broadcasts became digital-only, effective June 12, 2009 and began providing a "nightlight" service. Until that date, the station's analog audio signal transmitted on a frequency of 87.75 MHz (+10 kHz shift). As a result, it could be picked up on the lower end of the dial on most FM radios at 87.7 MHz. This was true of all other analog channel 6 stations in the United States. The station often promoted this additional way of coverage. After the transition, the station continued its digital broadcasts on channel 44.