AM transmitter efficiency is a big topic right now, as noted in several recent RW stories, and Harris will talk about its involvement and history with these efforts during this week's NAB Show.
The manufacturer issued a statement this weekend that it is supporting Alaska Public Broadcasting tests for improving efficiency with Adaptive Carrier Control, a technique used to reduce power consumption. "The company has also engaged with the FCC to open the possibility that more U.S. broadcasters can evaluate this green technology moving forward," it said.
Harris said its Adaptive Carrier Control (ACC) system is capable of several power reduction algorithm operations, including Dynamic Carrier Control (DCC), which employs many power saving curves; and Amplitude Modulation Companding (AMC), which also yields energy savings. "Together, DCC and AMC efficiencies within the Harris ACC system can potentially reduce operating costs by up to 35%," it stated, adding that it has been providing ACC systems to international customers since it introduced its Super Power DX AM transmitter in 1993. "Alaska Public Broadcasting is testing the Harris ACC system within its operational Harris DX10 transmitters, taking advantage of an experimental license obtained from the FCC. The Harris ACC system can also be used in Harris 3DX and DAX AM transmitters, for both new and existing installations."
"Alaska Test Produces Lower AM Power Costs"
Leslie Report on Dynamic Carrier Control