1.分别利用计算法和查表法产生1000Hz的余弦波信号，并使用示波器观测产生信号的频率和幅度。

2.利用计算法产生其他非正弦类周期信号波形，如周期矩形波、三角波、锯齿波等。-1. Each calculation method and the use of look-up table method have 1000Hz the cosine wave signal, Oscilloscope observation and the use of the generated signal frequency and amplitude. 2. Using calculations have other types of non-sinusoidal waveform signal cycles, such as the cycle of the square wave, triangle wave, sawtooth so.