[问答]

光圈时间实际上不等于测量时间

809 脉冲

问答对人有帮助，内容完整，我也想知道答案 0 假设光圈时间实际上不等于测量时间，我是否正确？我问，因为即使光圈为500ns，我也无法测量10us脉冲的峰值。 DSDC模式工作正常，但我失去了自动量程，这是DCV模式的一个很好的功能。我已经用尽了手册中有关DCV模式数字化的所有选项，但似乎无法找到一种方法来测量任何小于25us长脉冲的峰值。即便如此，我还是要将测量延迟到脉冲中以获得正确的读数。几乎看起来好像我的信号有一个~40kHz的低通。如果有人有任何想法，我很乐意听到他们。谢谢！以上来自于谷歌翻译以下为原文 Am I correct in assuming that aperture time does not actually equal measurement time? I'm asking because I cannot measure the peak value of a 10us pulse even with with an aperture of 500ns. DSDC mode works fine, but I lose the auto ranging which is a nice feature of DCV mode. I've exhausted all of the options in the manual regarding digitizing with DCV mode, but can't seem to find a way to measure a peak value on anythign less than a 25us long pulse. And even then I have to delay the measurement 20us into the pulse to get a correct reading. It almost seems as if there is a ~40kHz low pass on my signal. If anyone has any ideas I would love to hear them. Thanks! 0
2019-7-16 11:01:17　　评论淘帖0 邀请回答您可以邀请以下用户，快速回答问题 × kingnet_52040 该类别下有 195 个回答。邀请回答 60user7 该类别下有 81 个回答。邀请回答蓝色冰汐该类别下有 45 个回答。邀请回答醉狼工作室该类别下有 41 个回答。邀请回答 ianwhoani 该类别下有 30 个回答。邀请回答 dkhwakd 该类别下有 25 个回答。邀请回答 aaabbb567 该类别下有 23 个回答。邀请回答 e08506806 该类别下有 20 个回答。邀请回答 szzjfyp 该类别下有 18 个回答。邀请回答 sonia87 该类别下有 16 个回答。邀请回答 ningee 该类别下有 16 个回答。邀请回答 zouqinxiang 该类别下有 15 个回答。邀请回答 xj5548 该类别下有 15 个回答。邀请回答 daichuangs 该类别下有 14 个回答。邀请回答 derek88 该类别下有 14 个回答。邀请回答 hzmbs2016 该类别下有 12 个回答。邀请回答 JST2006 该类别下有 12 个回答。邀请回答 hu_wflllllllg21 该类别下有 11 个回答。邀请回答 fichesw 该类别下有 11 个回答。邀请回答 www037 该类别下有 11 个回答。邀请回答举报王锦霞相关推荐 • ch552使用ad采集数据，为什么通道1AD值等于nu的值，通道3AD值不等于num的值？ 559 • 请问级联共栅级LNA的输出功率增益为什么不等于电压增益？ 2695 • 为什么temp不等于调试器中的TIM2 CNT寄存器呢？ 311 • 请问为什么74HC245 CE接低电平，AB接高电平，B端电压还是不等于A端电压？ 4279 • 在这种情况下我希望X不等于0时只有一个数进入队列，不知道该怎么写 1977 • USB UART通信超级终端显示不等于并联电阻的电压值 1373 • 设计一个交流恒流源，测试出来在负载上不恒流，且电压跟随器输出不等于输入，为什么？ 104 • 请问判断后重新赋值C语该怎么写？ 907 • DC-DC boost变换器占空比 2648 • 如何用matlab求不等式方程 9177 1个回答

答案对人有帮助，有参考价值 0 您好，您目前如何设置3458A，也许您可以提供命令列表？你是正确的，光圈不等于每次测量的总时间。前者有很多东西可以发挥作用：自动归零，自动量程，配置时间，总线时间（如果编程）等等......光圈是实际信号的测量时间，但这只是其中的一部分。处理。现在DCV模式下的最大读取速度为100Ksamples / sec，设置需要恰到好处才能达到该速度，并且您的信号为100KHz，即每个周期只有1个样本。你达到巅峰的可能性不是很大。通常我建议数字化信号然后只是打开数学并查看最大最小值，或者自己对数据进行后处理，但如果你的信号是100KHz，那就不行了。为了满足奈奎斯特，你的信号必须是50KHz或更低，而这正在推动它。另外注意，你是正确的DSDC模式在捕获峰值方面比DCV更好。你说你喜欢DCV，因为自动量程，但是在DCV中，如果你的自动量程，你将无法快速采样以捕获你想要的脉冲。您必须使用手动范围。如果你提供更多信息，我会很乐意尽我所能，但我不承诺你能在DCV模式下做你想做的事。以上来自于谷歌翻译以下为原文 Hello, How do you currently have the 3458A setup, maybe you could provide a command list? You are correct that aperture does not equal total time per measurement. There is a lot of things that play into that ex: autozero, autorange, config time, bus time (if programming), etc.... The aperture is how long the actual signal is measured, but that is just one part of the process. Now the max readspeed in DCV mode is 100Ksamples/sec, and the settings need to be just right to achieve that speed, and your signal is 100KHz, that's only 1 sample per cycle. The chances of you getting the peak is not very good. Normally I suggest digitizing a signal then just turning on math and looking at the max min, or post process the data yourself, but if your signal is 100KHz, that's not going to work. In order to fulfill nyquist your signal would have to be 50KHz or less, and that's pushing it. One other note, you are correct DSDC mode is better at capturing peaks than DCV. You say you like DCV because of autoranging but, in DCV, if your autoranging there is no way your gonna sample quickly enough to capture the pulse you want. You must use a manual range. I'll be happy to help best I can if you provide some more information, but I'm not promising you'll be able to do what you want in DCV mode.

2019-7-16 11:13:24 评论举报杨梅