宽带LFM信号数字产生与采集系统

Wide-Band LFM Signal Generator and Acquisition System

介绍了采用高速数字基带和正交调制电路实现的宽带LFM脉压信号产生系统的工作原理及实现方法 ,给出了系统产生的 70MHz带宽、2 0 μs时宽、2 0 0MHz中频LFM信号的实测频谱 ,结果表明 ,信号杂散达到 - 6 0dB。同时介绍了 10

This paper introduces the principle and design methods of an wide-band LFM signal generator employing digital base-band circuits and an orthogonal modulator. The experimental results of the generator with the time duration of 20μs, LFM bandwidth of 70MHz and IF of 200MHz are presented, which show that the spurious signals are below -60dB. A 100MHz high speed data acquisition system and its relevant experiment are also discussed.\;