模拟信号发生器，模拟正弦，余弦，三角波，锯齿波，同时可实现幅度、频率调节-Analog signal generator, analog sine, cosine, triangle, sawtooth, while maintaining a range of frequency adjustment

改进型三点式振荡器 西勒电路 可以改变电路的振荡频率和信号的输出幅度-Improved three-point oscillator Sillery circuit can change the oscillation frequency of the circuit and the signal amplitude of the output

扫频信号3d分析,时间、幅度、频率三维显示，图形用水墙、分布图显示。-The sweep signal 3d, time, amplitude, frequency, three-dimensional display, graphics water wall maps.

射频低通滤波器、带通滤波器、Chebyshev滤波器等射频滤波器的设计。 对新手入门非常有用，也有助于老手进一步理解射频滤波器中各种器件 参数对滤波器幅度频率特性、相位频率特性的影响。(RF filters such as RF low pass filter, bandpass filter, Chebyshev filter and so on. It is very useful for beginners, and it helps the old hands to further