Energy Savings with MDCL

摘要

In fiscal year 2010, the International BroadcastingBureau (IBB) implemented Amplitude Modulation Companding(AMC) in 19 high power radio transmitters contributingto annual energy savings of 17.7 million kilowatt-hours and acost savings of $US 2.17 million despite a rising utility rate.Prior to converting to AMC, these transmitters used energysavings methods such as ACC, CCM, DCC, or DAM. In thispaper, we compare the various Modulation-Dependent CarrierLevel (MDCL) methods, calculate theoretical consumption,and discuss the exploitation of the receiver’s automaticgain control, peak RF voltages, and audio processor settingsfor optimum savings. Our experiences and observations areprovided to those who wish save energy using MDCL.