为什么33521上的对数扫描会在超过20秒的时间内以对数方式扫描在最后一秒内进入停止频率

最后一句应该是“...... 200秒......”



     以下为原文

  That last sentence should read "... 200 second..."

这个问题听起来很熟悉，你运行的是什么固件版本？



     以下为原文

  This issue sounds familiar, what firmware rev are you running?

该设备是全新的，开箱即用，校准日期为2012年4月，固件为1.14-1.19-1.01-50-00。



     以下为原文

  The unit is brand new, out-of-the-box, with a calibration date of April 2012, and the firmware is 1.14-1.19-1.01-50-00.

你好，我有一位同事测试了这个，因为我不在办公室，他们没有任何问题。
是什么样的wavehape？
如果它不是正弦波，请切换到正弦波并重复实验。
保持/返回时间是否设置为0秒？
它是如何衡量的？
最好使用直流耦合和固定触发电平，因为频率较慢（



     以下为原文

  Hello,

I had one of my colleagues test this out since I'm out of the office and they did not have any issues.

What waveshape is being used?  If it isn't a sine wave, please switch to a sine wave and repeat the experiment.
Are the hold/return times set to 0 seconds?  


How is it being measured?  Best to use DC coupling and a fixed trigger level, because at slow frequencies (<100 Hz) you can get some strange behaviors with AC coupling or auto triggering.  This is especially true if using a counter to make the measurement.

我正在使用33521A（是的，设置为sin）作为全新斯坦福研究系统2相锁定放大器的外部参考，同时驱动大约1k欧姆负载。
SRS上的参考输入为高阻抗。
锁定在扫描时显示参考频率。
这里绝对没有测量问题。
我用锁定器测量校准的1mH 16号空芯电感器上的信号，该电感器与1k欧姆电阻器串联，查看电感器两端的信号，我绝对可以看到频率不会像它应该的那样扫过
。
我可以拉出omega-L阻抗和相移，并知道问题不是测量的假象。
我用我的旧HP3325B代替了频率源，它对我正在做的一切都很好，包括所有校准测试，使用与我设置的Agilent 33521A相同的参数。
该单元根本不是以开始频率，停止频率和时间（是，低于500秒）确定的对数标度扫描频率。
我花了一天时间四倍检查这个众所周知的六道到周日（主要是因为我无法相信你会因为这种问题而让事情发生）。
如果没有固件更新或此类型的已知问题，则很明显该设备有缺陷，并将与我从中购买的供应商一起完成退货流程。
质量控制部门似乎搞砸了这个。
不是我买的时候的预期。
:-(



     以下为原文

  I am using the 33521A (yes, set on sin)  to be the external reference on a brand new Stanford Research Systems 2-phase lockin amplifier and simultaneously drive a circa 1k-ohm load.  The reference input on the SRS is high impedance.  The lockin displays the reference frequency as it is sweeping.  There are absolutely no measurement issues here.  I had the lockin measure the signal on a calibrated 1mH 16-gauge air core inductor in series with a 1 k-ohm resistor, looking at the signal across the inductor, and I can absolutely see that the frequency is not sweeping the way it should.  I can pull out the omega-L impedance and the phase shift and know that the problem is not an artifact of measurement.  I substituted my older HP3325B as the frequency source, and it works just fine for everything I'm doing, including all calibration tests, using identical parameters as I had the Agilent 33521A set to.  The unit is simply not sweeping frequencies on a logarithmic scale determined by the start frequency, stop frequency, and time (yes, under 500 seconds).  I spent a day quadruple-checking this the proverbial six-ways-to-Sunday (mainly because I couldn't believe you'd let something go through with this kind of problem).  If there is no firmware update or known problem of this type, then it is clear the unit is defective and will go through the return process with the supplier I bought it from.  The quality control department appears to have screwed up on this one.  Not what I expected when I bought it. :-(

你好戴尔，如果你还有单位，也许你可以发给我一个州档案，所以我可以尝试重复这个？
到目前为止，我没有看到这些问题，所以它肯定可能是你的单位，但也许我只是错过了某个地方的设置。



     以下为原文

  Hello Dale,

If you still have the unit maybe you could send me a state file, so I can try and repeat this?  So far I am not seeing these problems, so it definitely could be your unit, but maybe I am just missing a setting somewhere.