 Addition of a small (50 kW) synchronised digital TV transmitter in State College, on the same frequency as the main UHF 15 signal, proved a means to improve reception; further improvements would be possible by adding small co-channel 50 kW transmitters in each community to be served.ATSC released standards on September 25, 2004 as guidance on the design of multiple transmitters, single frequency networks and multiple frequency networks.The new 2004 standards included