【摘要】 应用ＤＳＰ技术和器件，设计完成的移频轨道电路自动测试系统，具有快速、准确地特点。文中分析了移频轨道电路的特点，给出了移频信号的频谱图和采样频率，分析了低频调制信号的测试精度更多还原

【Abstract】 The frequency shift track circuit automatic test system using DSP technique and devices is implemented, which has the characteristics of quickness and accuracy. The characteristic of frequency shift track circuit, the frequency spectrum and sample frequency of frequency shift signal, and the test accuracy of low frequency modulated signal are analyzed in this paper.更多还原