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一、引言根据国际电工委员会(IEC)179A及651标准的有关规定,对声级计(特别是脉冲声级计)的峰值因数容量,检波器特性及表头时间动态特性的试验和校准,需要一种具有一定重复周期和宽度的矩形脉冲,以及具有1kHz和2kHz正弦波的猝发声。目前我国对声级计的应用范围日趋广泛,需求量也很大。为了检查、校对声级计以及其它声频电压表的峰值因数容量、检波器特性及表头时间动态特性,我们为适应本所科研和国内有关工作的需要,根据IEC的有关规定,研制成802型矩形脉冲和猝发声发生器。二、工作原理802型矩形脉冲和猝发声发生器系全晶体管化仪器。它由方波发生器、脉冲宽度形
I. INTRODUCTION According to the relevant provisions of International Electrotechnical Commission (IEC) 179A and 651 standards, it is required to test and calibrate the crest factor capacity of the sound level meter (especially the pulse sound level meter), the characteristics of the geophone and the dynamic characteristics of the meter head time A rectangular pulse with a certain repetition period and width, and a burst sound with 1 kHz and 2 kHz sine waves. At present, China’s sound level meter has an increasingly wide range of applications, demand is also great. In order to check and calibrate the crest factor of the sound level meter and other audio voltmeters, the characteristics of the geophone and the dynamic characteristics of the time of the meter, in order to meet the needs of our research and domestic work, according to the relevant provisions of IEC, Rectangular pulse and burst generator. Second, the working principle of 802 rectangular pulse and burst generator is a full transistor transistor device. It consists of square wave generator, pulse width shape