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目前,从蜂窝电话到无线数据传输的无线通信市场正以惊人的速度发展,与此同时,对检验器件和系统性能的测试设备的需求也在不断增长.信号发生器在接收机和发射机的研制中起着多方面的作用,它用来产生从代替本振的简单正弦单音频信号到用于接收机测试的全调制信号.文章着重阐述在射频通信测试中采用频谱纯度相当高的信号发生器的重要性.理想的信号发生器在载频和边带频率上均应提供完全的正弦波形,但实际上所有信号都存在不完善性.对这些缺陷事先加以考虑将有助于工程师选择适当的信号发生器并缩短产品开发时间.
At present, the wireless communications market from cellular phones to wireless data transmission is growing at a phenomenal rate, and at the same time, there is an increasing demand for test equipment to verify device and system performance.Signal generator at receiver and transmitter It plays a multifaceted role in the development and is used to generate simple sine monophonic signals instead of local oscillators to fully modulated signals for receiver testing.The article focuses on the use of signals of very high spectral purity in RF communications testing The importance of an ideal signal generator in the carrier frequency and the sideband frequency should provide a complete sine wave, but in fact all the imperfections of the signal.Perhaps these defects will help engineers choose the appropriate Signal generator and shorten product development time.