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DX发射机模数转换(A/D转换)通路的作用是把从模拟输入板送来的音频信号转换成数字信号,这个数字信号经过调制编码板后就决定了在某一瞬间需要合通放大模块的数目。而模数转换的频率是由发射机的模数转换取样通路决定的,这个通路是否能工作正常,决定着A/D转换模块是否能正常工作,发射机是否能正常开启和正常运行,本文着重分析发射机A/D转换通路的取样信号通路是怎样工作的。
DX transmitter A / D converter (A / D converter) channel is the role of the analog input board sent from the audio signal is converted to digital signals, the digital signal through the modulation encoding board after the decision in a moment need to be combined to enlarge The number of modules. The analog-digital conversion frequency is determined by the transmitter analog-digital conversion sampling path, the path is working properly, determines whether the A / D converter module is working properly, the transmitter can be normally turned on and normal operation, this article focuses Analysis of transmitter A / D conversion path of the sampling signal path is how to work.