机顶盒也把数字信号转换为模拟信号，所以一个旧电视可以显示程序。
The set-top box also converts the digital signal to an analogue signal so an older television can display the programs.
信号采样是模拟信号向数字信号转换的第一步，为数字信号处理奠定基础。
All-optical sampling is a fundamental part in the structure of the analog-to-digital conversion (ADC) processing, which is necessary for digital signal processing.
所述前端电路包括用于将所接收的数字信号转换为多个模拟网络中被选择的一个的多个可编程信道电路。
The front end circuits comprise a plurality of programmable channel circuits for converting received digital signals into selected one of a plurality of analog network.
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