描述
随着测试设备的飞速发展,其性能状况越来越受到人们的重视,经过一段时间要对测试设备进行检测。主测试板作为测试设备上的重要部件,它的性能好坏起着重要作用。在对其进行性能测试时,由于没有专用的信号源,一般都是安装在设备上进行试验。这不仅费时费力,而且更重要的是增加了修理成本,因此,迫切需要专用的测试设备。本信号源就是针对这一问题而设计的。
2信号源的设计要求
根据对多数测试设备修理试验工艺的分析,该信号源具体要求如下:
四路电压信号:一路电压范围为-25V~25V的直流信号源,精度要求为:0V~1V的误差为±0.1V,1V~25V的误差为±0.05V,-25V~0V的误差为±0.15V;其中一路产生幅值为0V~25V的方波,幅值误差为±0.2V,频率误差为1Hz;
一路电压范围为-100mV~100mV的直流信号源,要求误差为±0.5mV;
一路电压范围为-0.5V~0.5V的直流信号源,要求误差为±0.005V;
一路电压范围为0V~5V的直流信号源,要求误差为0.01V。
四路模拟温度信号。
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