1979 as translators W36AB and W62AY, respectively. They were later replaced by full-powered licenses from the same transmitter sites. Digital television Digital channels The stations' digital signals are multiplexed: WMPT / WMPB digital channels Analog-to-digital conversion MPT's stations shut down their analog signals on June 12, 2009, the official date in which full-power television stations in the United States transitioned from analog to digital broadcasts under federal mandate. The station's digital channel allocations post-transition are as follows: WMPB shut down its analog signal, over UHF channel 67; the station's digital signal remained on its pre-transition UHF channel 29, using PSIP to display the station's virtual channel as its former UHF analog channel 67, which was among the high band UHF channels (52-69) that were removed from broadcasting use as a result of the transition. WMPT shut down its analog signal, over UHF channel 22; the station's digital signal remained on its pre-transition UHF channel 42, using PSIP to display the station's virtual channel as its former UHF analog channel 22. WCPB shut down its analog signal, over UHF channel 28; the station's digital signal relocated from its pre-transition UHF channel 56, which was among the high band UHF channels (52-69) that were removed from broadcasting use as a result of the transition, to its analog-era UHF channel 28. WWPB shut down its analog signal, over UHF channel 31; the station's digital signal remained on its pre-transition UHF channel 44, using PSIP to display the station's virtual channel as its former UHF analog channel 31. WGPT shut down its analog signal, over UHF channel 36; the station's digital signal relocated from its pre-transition UHF channel 54, which was among the high band UHF channels (52-69) that were removed from broadcasting use as a result of the transition, to its analog-era UHF channel 36. WFPT shut down its analog signal, over UHF channel 62; the station's digital signal remained on its pre-transition UHF channel 28, using PSIP to display the station's virtual channel as its former UHF analog channel 62, which was among the high band UHF channels (52-69) that were removed from broadcasting use as a result of the transition. Spectrum reallocation As a part of the repacking process following the 2016–2017 FCC incentive auction, channels 38 through 51 were removed from television broadcasting. None of MPT's stations sold their allocations, but five of them moved channels within the UHF band: