Good to see you demonstrating Math menu functions of oscilloscope. I remember the old HP3577A Network analyzer have DEFINE MATH functions for multi-receivers in frequency domain although it's not spectrum analyzer.
Your videos are very great, I already shared your channel with all my colleagues. keep creating quality content. Thank you. Saludos desde Argentina..!!
I was really surprised just how well it turned out in real life; I was afraid that the simulation would be just too ideal in comparison with the practical circuit.
your videos are simply amazing.... I have learnt so much from you .....can you make a video on how common mode noise is generated in typical high frequency electronic circuits?
Hello, Nice vidoe. I have simulated a filter for a noisy DC power supply where I considered using a common mode choke first for common mode noises, followed by a ferrite bead with some capacitors, and finally a Pi filter with a 127kHz cutoff. I connected a generator to simulate how effective my design circuit is. I used the generator you created in the video and connected it to the EMI/EMC filter I designed, placing it on the power supply's positive (+) and negative (-) lines. On the output, I plotted the dBuV against the magnitude, essentially performing an AC analysis. My filter response is very good, with attenuation exactly at 127kHz, where it drops off significantly. My question is: for simulating the filter with a high noise input power supply, is the generator you designed sufficient? If it is, what would be the best way to analyze the filter's output? Specifically, how do I interpret the dB to magnitude graph to confirm that my filter is working effectively?
first of all, thank you for your video it's very helpful, I just have a question about the source of the common-mode voltage as we know we apply just the differential voltage between the two wires but the common one exist too
differential noise and differential signals are different. Correct? It seems like common mode and differential mode usage depends on what we are talking about, noise, signal, rejection ratio etc. which makes it confusing
in an unbalanced system, is it enough to connect oscilloscope channel A to circuit signal, channel B to circuit ground, with scope grounds floating, creating a floating differential pair to perform MATH functions on to learn CM and DM properties? I am looking for a budget friendly way to measure improvements in CM noise when applying filters, with the major tools available being oscilloscope and function generator.
Hell FesZ, So, in the real world if you have a class I device or a class II device you would make these measurements with respect to chassis i.e. you would use two probes with each of their grounds connected to chassis? The two signals (sig1 and sig2) are representing the signal and return path correct?
In the case of the CM noise, I was measuring the noise in reference 2 ground both times, so the values added up; with the DM, if its properly floating then the values in reference to GND would be half of the initial signal; both lines are oscillating in reference to GND, when one is increasing the other is decreasing and the total peak to peak never exceeds the initial input value - rather than having 5-(-5) the total would be 2.5-(-2.5)
good morning your videos are wonderful, do you happen to have one that measures the thd of an amplifier between the input and output Vsin signal) the classic settings I'm using don't work or in any case I find anomalies. grazie
You can do that only if first you use a passive or active circuit that processes the 2 signals. There are some commercial products that can achieve this.
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I don't know why your subscriber number is still stuck at 18K. You deserve way more subscriber. Excellent video. Thank you!
It's 60.5k now!! Consider that electronics is not a topic that a lot of people on TH-cam will look for.
Good to see you demonstrating Math menu functions of oscilloscope. I remember the old HP3577A Network analyzer have DEFINE MATH functions for multi-receivers in frequency domain although it's not spectrum analyzer.
Your videos are very great, I already shared your channel with all my colleagues. keep creating quality content. Thank you. Saludos desde Argentina..!!
Much appreciated! Thank you!
Thank you Sir!... Running the experiment in real physical oscilloscope made things even more interesting 🕺🕺🕺
I was really surprised just how well it turned out in real life; I was afraid that the simulation would be just too ideal in comparison with the practical circuit.
Great as usual!
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Thank you FesZ Electronics!
your videos are simply amazing.... I have learnt so much from you .....can you make a video on how common mode noise is generated in typical high frequency electronic circuits?
This channel is a gem, great video! Thanks a lot!
Mr. Thank you for that great explanations
Hello, Nice vidoe. I have simulated a filter for a noisy DC power supply where I considered using a common mode choke first for common mode noises, followed by a ferrite bead with some capacitors, and finally a Pi filter with a 127kHz cutoff. I connected a generator to simulate how effective my design circuit is. I used the generator you created in the video and connected it to the EMI/EMC filter I designed, placing it on the power supply's positive (+) and negative (-) lines. On the output, I plotted the dBuV against the magnitude, essentially performing an AC analysis. My filter response is very good, with attenuation exactly at 127kHz, where it drops off significantly. My question is: for simulating the filter with a high noise input power supply, is the generator you designed sufficient? If it is, what would be the best way to analyze the filter's output? Specifically, how do I interpret the dB to magnitude graph to confirm that my filter is working effectively?
Thank you for posting this video it would have been nice to show how to filter out these noises
I love to learn from you. Very informative.
Great video, thank you so much!
Glad you enjoyed it! Thank you!
first of all, thank you for your video it's very helpful, I just have a question about the source of the common-mode voltage as we know we apply just the differential voltage between the two wires but the common one exist too
Amazing, thank you for this video. simple and precise. Interested watch your video measuring it on a spectrum analyzer
More than a year later, I actually got to do that :D th-cam.com/video/fhPTnoNQG_A/w-d-xo.html
differential noise and differential signals are different. Correct? It seems like common mode and differential mode usage depends on what we are talking about, noise, signal, rejection ratio etc. which makes it confusing
in an unbalanced system, is it enough to connect oscilloscope channel A to circuit signal, channel B to circuit ground, with scope grounds floating, creating a floating differential pair to perform MATH functions on to learn CM and DM properties?
I am looking for a budget friendly way to measure improvements in CM noise when applying filters, with the major tools available being oscilloscope and function generator.
Very informative video!
Glad it was helpful!
Hell FesZ,
So, in the real world if you have a class I device or a class II device you would make these measurements with respect to chassis i.e. you would use two probes with each of their grounds connected to chassis? The two signals (sig1 and sig2) are representing the signal and return path correct?
Why doesn't the DM noise also double when it is isolated? By subtracting the two lines, I'd expect something like 5-(-5)=10, or -5-5=-10.
In the case of the CM noise, I was measuring the noise in reference 2 ground both times, so the values added up; with the DM, if its properly floating then the values in reference to GND would be half of the initial signal; both lines are oscillating in reference to GND, when one is increasing the other is decreasing and the total peak to peak never exceeds the initial input value - rather than having 5-(-5) the total would be 2.5-(-2.5)
good morning your videos are wonderful, do you happen to have one that measures the thd of an amplifier between the input and output Vsin signal) the classic settings I'm using don't work or in any case I find anomalies. grazie
This is good stuff.
Thank you! I'm happy you are enjoying it!
thanks so much
❤❤❤
how to view the addition and subtraction of two channels on spectrum analyzer
You can do that only if first you use a passive or active circuit that processes the 2 signals. There are some commercial products that can achieve this.
Very good, but you stopped just before the most useful part!
In the mean time, part 2 did come out - th-cam.com/video/fhPTnoNQG_A/w-d-xo.html
@@FesZElectronics Perfect, thanks! I did search but with the wrong search term.
Dutch?
No, Romanian