DM40C万用表信号发生器实际频率
正点原子DM40C万用表信号发生器实际频率
测试设备RIGOL DG822 pro
探头倍率X1
输入阻抗1MΩ
耦合类型AC

| Hz | Hz | Hz |
|---|---|---|
| 测不出来 | 11.00003Hz | 21.00456Hz(乱跳15Hz) |
| 2.000004Hz | 12.00243Hz | 21.99586Hz(乱跳16Hz) |
| 2.999406Hz | 13.00004Hz | 23.00484Hz(乱跳) |
| 4.000008Hz | 14.00151Hz | 30.00017Hz(乱跳) |
| 5.00001Hz | 15.00009Hz | 40.00007Hz |
| 6.001217Hz | 15.99847Hz | 50.00009Hz |
| 7.000021Hz | 17.00019Hz | 60.00396Hz |
| 8.000017Hz | 18.00365Hz | 70.00462Hz |
| 9.001826Hz | 18.99642Hz | 80.00528Hz |
| 10.00002Hz | 20.00004Hz | 90.00594Hz |
| Hz | Hz | Hz |
| 100.0002Hz | 184.9527Hz | 599.9524Hz |
| 110.0161Hz | 190.0314Hz | 650.0275Hz |
| 120.00079Hz | 200.0005Hz | 699.8896Hz |
| 130.0257Hz | 250.0006Hz | 749.9079Hz |
| 140.0092Hz | 299.9677Hz | 799.8737Hz |
| 149.9838Hz | 349.9565Hz | 849.9084Hz |
| 160.0105Hz | 400.0168Hz | 899.9299Hz |
| 169.9815Hz | 449.9642Hz | 950.2112Hz |
| 175.0398Hz | 500.0011Hz | 1.000003KHz |
| 180.0119Hz | 550.0562Hz | 1.999615KHz |
| KHz | KHz | KHz |
| 2,999417KHz | 13.00398KHz | 23.04161KHz |
| 4.000025KHz | 14.00569KHz | 24.03862KHz |
| 5.000031KHz | 15.01511KHz | 25.00016KHz |
| 6.002437KHz | 16.00011KHz | 26.04183KHz |
| 7.002845KHz | 17.00691KHz | 27.02718KHz |
| 8.000055KHz | 18.01815KHz | 28.01137KHz |
| 9.000962KHz | 19.01154KHz | 29.06993KHz |
| 10.00007KHz | 20.00011KHz | 30.03025KHz |
| 11.00117KHz | 21.00852KHz | 31.05612KHz |
| 12.00486KHz | 22.02655KHz | 32.05152KHz |
| KHz | KHz | MHz |
| 33.00351KHz | 43.10375KHz | 500.0028KHz |
| 34.01389KHz | 44.05319KHz | 1.000006MHz |
| 35.08795KHz | 45.04535KHz | 2.000012MHz |
| 36.10136KHz | 46.08328KHz | |
| 37.03731KHz | 47.17015KHz | |
| 38.02306KHz | 48.07722KHz | |
| 39.062.78KHz | 49.01995KHz | |
| 40.00027KHz | 50.00035KHz | |
| 41.15256KHz | 100.0006KHz | |
| 42.01712KHz | 200.0012KHz |
本文针对DM40C型数字万用表内置信号发生器的实际输出频率进行实测分析,重点考察其在不同档位下的频率精度、稳定性及与标称值的偏差,结合单片机时钟源和嵌入式硬件设计因素探讨误差成因,为嵌入式系统中基于该设备的信号校准与测试提供实证参考。
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