说明：  系统能够产生正弦波、方波、三角波。同时还可以作为频率计测频率。函数信号的产生由MAX038和外围电路完成，能产生1Hz—20MHz的波形。
(system can produce sine, square, triangle wave. Also as frequency measurement frequency. Signals generated by the MAX038 completed and the external circuit, which can produce 1Hz- 20MHz waveforms.)