嗨，我也有一些关于使用E4980A测量低阻抗部件的问题。
我们正在测量一个6.8uH P7614电感器，它被指定为100kHz / 250mV信号源。
我们从规格的低端获得读数，大约为5uH。
我们注意到即使ALC打开，信号源也会从250mV显着下降到8mV。
我们尝试了其他电感器（不同的部件号）并获得了相同的结果。
在较高频率下不是这种情况（在1MHz时，信号源不会下降）。
鉴于信号源无法调节，我们想知道“电感”读数是否仍然有效，并且与在精确信号源读取时相同？
如果没有，预期的错误是什么？
这是否也适用于可测量仪器的电容器或其他无源器件？
希望安捷伦也能对此有所了解。
谢谢，NianEdited：nian29于2012年4月25日上午2:01
以上来自于谷歌翻译
以下为原文
Hi,
I also have some questions on measuring parts at low impedances using the E4980A. We are measuring a 6.8uH
P7614 inductor which is specified to 100kHz/250mV signal source. We are getting readings from the low end of the specification, at around 5uH.
We noticed that the signal source significantly dropped from 250mV to 8mV, even when ALC is on. We tried other inductors (different part number) and is getting the same results. This is not the case at higher frequencies (at 1MHz, the signal source does not go down).
Given that the signal source cannot be regulated, we want to know if the "Inductance" reading is still valid and would be the same as if read at the exact signal source? or if not, what is the expected error? Does this also applies to capacitors or other passive devices measurable to the instrument?
Hope Agilent can also put a light on this.
Thanks,
Nian
Edited by: nian29 on Apr 25, 2012 2:01 AM
嗨，我也有一些关于使用E4980A测量低阻抗部件的问题。
我们正在测量一个6.8uH P7614电感器，它被指定为100kHz / 250mV信号源。
我们从规格的低端获得读数，大约为5uH。
我们注意到即使ALC打开，信号源也会从250mV显着下降到8mV。
我们尝试了其他电感器（不同的部件号）并获得了相同的结果。
在较高频率下不是这种情况（在1MHz时，信号源不会下降）。
鉴于信号源无法调节，我们想知道“电感”读数是否仍然有效，并且与在精确信号源读取时相同？
如果没有，预期的错误是什么？
这是否也适用于可测量仪器的电容器或其他无源器件？
希望安捷伦也能对此有所了解。
谢谢，NianEdited：nian29于2012年4月25日上午2:01
以上来自于谷歌翻译
以下为原文
Hi,
I also have some questions on measuring parts at low impedances using the E4980A. We are measuring a 6.8uH
P7614 inductor which is specified to 100kHz/250mV signal source. We are getting readings from the low end of the specification, at around 5uH.
We noticed that the signal source significantly dropped from 250mV to 8mV, even when ALC is on. We tried other inductors (different part number) and is getting the same results. This is not the case at higher frequencies (at 1MHz, the signal source does not go down).
Given that the signal source cannot be regulated, we want to know if the "Inductance" reading is still valid and would be the same as if read at the exact signal source? or if not, what is the expected error? Does this also applies to capacitors or other passive devices measurable to the instrument?
Hope Agilent can also put a light on this.
Thanks,
Nian
Edited by: nian29 on Apr 25, 2012 2:01 AM
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