Kirkhaan

Understood - thanks for closing the loop of understanding.

Hey @attila, I had to set it to 10kV and then it works (also Maximum did not work). I checked on the scope and it indeed was related to a clipping signal. In scope mode the same 180V is measured with 20V/div. Somewhat strange that the Maximum range does not work. Anyhow, I can proceed now. Thanks for helping me out!!

@attila, already managed to do a check. It works, but I get too low voltage rating. See attached screenshots. It is consistently measuring 180V in the Data Logger, while the RMS measurement in the oscilloscope mode shows 230V (correct value). It does not matter which sample rate I choose. Probe settings are set to 200 X, so are correct. Any idea what I could be missing?

Thanks for digging further @attila. I'm going to check it out tomorrow!

As always, thanks for your swift reply @attila! Then I have to find another solution for logging the RMS AC mains voltage. Is it possible to plot a measurement (e.g. as a math channel) in the oscilloscope mode? I realize that it cannot log for hours then, but its a good starting point for me to see how the AC RMS voltage trend develops over minutes.

In the reference manual I see several RMS functions listed for the data logger: However, in version 3.23.4 on my Linux machine I do not see them: Anyone an idea where this delta is coming from? I have a few high voltage differential probes hooked up to my ADP3450 and want to log the RMS value of the mains for a few hours.

Aha, fair enough. I never observed that before with other bench-top scopes. Probably because the models I worked with have bandwidth >400MHz.

Question to the experts: I observe a signal distortion on my brand new ADP3450 when using AC coupling. In attached screenshot I tried to capture this. Both channel 2 and 4 have the same 1kHz, 500mVpp square wave feed. In this example it is coming from an Agilent 33250A, but the observation is exactly the same when fed from the wave generator on the ADP3450. Channel 1 and 2 show identical behavior. Exchanging the BNC cables does not make a difference. When using one of the voltage probes that were included with the ADP3450, it also shows when the probe is set to 1:1. When the probe is set to 1:10 attenuation (so 9MΩ impedance), it is not shown anymore, so then the square wave is flat on top and bottom and exactly matches the signal shape that we see with DC coupling. What are we looking at here? Is the 50Ω output of the signal generator somehow too much load for the ADP3450 inputs when using AC coupling???

I've found one. Not searching anymore. Looking to buy an ADP3450. Please let me know in case you have one available or know of a good deal. Thanks!

Thanks @attila, I am going to play with it!

Hi forum members, I am using an AD2 with a passive 1:10 voltage probe that has the following transfer function: So as can been seen, its 1:10 attenuation drops over frequency. Is there a way to compensate for this in using custom probe settings? In WaveForms I only found Linear, Table and Custom tabs, which seem to be only voltage related. So no dynamic attenuation possible over frequency.