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DX系列中波发射机主要由几个单PB功率合成后输出总功率。我单位各单PB的输出功率为200KW。主要是运用了220个等压模块和4个二进制射放,共同构成射频放大级,在瞬间,通过由调制编码板来的224路开关信号控制模块的开通关断数目,经跌加后输出射频功率,经滤波后形成调幅波,实现振幅调制。射频放大模块是发射机的基础,所以日常维护好功放模块,是保证发射机安全播出的基本保证。
DX series of medium-wave transmitters mainly by a few single PB power output after the total output power. My unit single PB output power of 200KW. Mainly the use of 220 isobaric modules and 4 binary radio, together constitute a radio frequency amplification stage, in an instant, through the modulation encoder board 224 to switch the signal to control the module on the number of shutdowns, the increase after the output of radio frequency Power, after the formation of amplitude modulated wave filter, to achieve amplitude modulation. RF amplification module is the basis of the transmitter, so routine maintenance of the power amplifier module, is to ensure the safety of the transmitter broadcast the basic guarantee.