Abstract: DAM-A series digital modulation transmitter microcomputer controller with S3C44B0X as the main controlling chip of developing method has been successfully used in digital modulation medium-wave radio DAM 10KW transmitter.This system has keyboard and screen,ethernet interface,serial,USB port,etc.This controller can not only scientifically maintain and manage equipment,but also effectively improve the broadcasting quality and efficiency of the radio transmitter.What's more important,it reduces the dependence of equipment on personnel and further improves "unattended" intelligence of broadcasting station.