说明：  函数信号发生器 本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。波形选择由单片机完成。输出或输入频率经74HC390分频后，由单片机完成自动频率检测显示。 关键词：波形产生器、频率计、MAX038、74HC390、AT89S51。
(Function signal generator of the system can produce sine, square, triangular wave. It also can be used as measuring the frequency of the frequency. Function signals generated by the MAX038 and peripheral circuits completed, can produce 1Hz-20MHz waveform. Waveform selection by Singlechip completed. Output or input frequency by frequency 74HC390 after completion of automatic frequency detection of single-chip display. Key words: waveform generator, frequency counter, MAX038, 74HC390, AT89S51.)