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开关电源测纹波时该不该加示波器的数字滤波呢?



Hi TI的工程师

     我现在在实验室应用德州仪器的开关电源,想测一下纹波,现在的示波器都有数字滤波功能,仔细查了下属于FIR滤波。我一般会把示波器的带宽设置为200MHz。但是数字滤波需要加么?就是sinx/x 这种,不太懂应不应该加,到底怎么加?希望您能指教

此致

张金雨