How to Decrease Noise in your Signals

System noise effects your measurements!
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Are you having trouble getting some of the noise out of your measurements? Did you know the fix could be as simple as using a different probe? Learn about the noise sources in your probe and oscilloscope, and how to decrease the effect they have on your signal.
In this episode of Probing Pitfalls, we’ll take a look at system noise, how this impacts your signal, and how to decrease it. The “system” is the oscilloscope and the probe being used together. Certain components in this system will create some noise. I’ll dive into why this happens, but the solution to this pitfall of excess noise is to simply select the correct probe attenuation ration. This will ensure you are introducing the least amount of noise possible and seeing and accurate signal on screen. I’ll guide you through how to select the correct attenuation ratio with some helpful tips.
After watching this episode, you’ll know which attenuation ratio to be using for your tests, and you’ll be making more accurate measurements than ever.
Stay tuned for future Probing Pitfalls episodes covering common probing mistakes and how to avoid them to ensure you are making accurate measurements.
You can ask us questions on Instagram: @keysightoscilloscopes / keysightoscilloscopes
Twitter: @DanielBogdanoff / danielbogdanoff
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The digital storage oscilloscope we used:
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(The Keysight InfiniiVision 4000 X-Series Oscilloscope)
The 4000 X-Series oscilloscopes offers a large 12.1 inch capacitive touch screen, a user interface designed for touch, and the exclusive Zone touch trigger, all combined with an industry-leading uncompromised update rate of 1 million wfm/s to help you see all of your signal detail. Plus, advanced analysis capabilities help you solve your hardest challenges quickly.
If you are looking for a lower cost oscilloscope that still has the segmented memory capability:
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(The Keysight InfiniiVision 1000 X-Series Oscilloscope)
This is an awesome cheap oscilloscope for beginners. Even though it has an ultra-low price, it has the quality of an industry level oscilloscope. It has a built-in digital multimeter, function generator (WaveGen), built-in training signals to learn quickly, and more!
Probing Pitfalls is hosted by Erin East and Melissa Spencer. The video series covers common oscilloscope probe pitfalls, the impact they have on your measurements, and how avoiding them can improve your test results. You’ll learn proper probing practices that will save you time in validating and debugging your designs, plus improve your overall knowledge and skill in the test lab.
#oscilloscope #oscilloscopes #electronics #electricalengineering #oscilloscopeprobing #probeproblems #probing #probe #oscilloscopeprobes #probingpitfalls #attenuationratio #badprobing

[@dosgos]

Very professional. Lots of information clearly explained in just 7 minutes. Thanks!

[@pa4tim]

Very nice demo. Just want to add something for those new to scopes 1x probes are only fine for DC and very low frequencies. The BW is most times only a fraction of the BW of the scope. For DC they are 1 Mohm but even for a few MHz they start to behave as a low impedance, this becomes worse as frequency increased and finaly they reach a frequency where they almost short the signal. How high they go depends on the capacitance. Most switchable probes are not great in performance and bad because you can switch them to 1x by accident. They are only standard on cheap scopes, I'm not 100% sure but I think you can not even buy really good ones I have only one 1x probe and seldom use it (I have >20 probes from 1x up-to exotic probes like flux-gate or 40kV probes

[@lovepreetsinghgill517]

You gave the content for another video to this girl.

[@SurfDetector]

An excellent explanation for a common issue. Well done.

[@CNe7532294]

Very interesting indeed. Imagine all the work/components that needs to be there in both designing then calibrating the oscilloscope lone. The probe is also interesting conversation. I'm glad I saw a switchable probe for a brief moment. For right now, I will just say, "in my opinion, a fixed 1:1 or 1:10 probe is much better to use than a switchable probe". I welcome anyone to agree or disagree with this claim and give a reason why.

[@sollykhan2385]

Thank you so much for the great content on this video, i can't help feeling that you were reading of a tele prompter? surely far too much knowledge disseminated in a short space of time without out takes ,,, Lol

[@MyawesumMe]

This was very helpful! Thank you!

[@frac]

Very well presented. You use the terms "high voltage measurement" vs. a "low voltage measurement" without specifying them. A brief, incomplete mention is given @6:15. I think it would have been helpful to define these terms in more detail, and before you started generalizing as "high" and "low". Keep up the great vids!

[@mad_fresc4842]

low voltage is 50V+ and high voltage 1000V+ for alternating current - you don't need an oscilloscope for direct current but the low and high voltages for direct current are higher though

[@MatSmithLondon]

It was accurate to use those terms, as they were relative terms. Defining them is not appropriate as it still depends on what the desired outcome is for measurement.

[@user-ci8fs4ce9h]

Great explanation, gorgeous presenter. Nicely done.

[@stephenjones7752]

Very nice presentation, thank you!

[@vishnukirangoli]

Well explained👏👍

[@amritmohanty6553]

very well explained , really helpful. thanks

[@adastra123]

Class . Thanks from Ireland .

[@lovepreetsinghgill517]

You Clearly explained it.

[@meeran3169]

Well explained

[@d3c0deFPV]

Thanks Erin!

[@charleyweaver1944]

Brilliant. Thank you!

[@EfieldHfield_377]

Thx great info. In practice 1:1 probes have limited value and the responce cure over frequency will be different than 10x. I have only ever purchased 10x probes and idk if this is always true but switchable probes tend to be low quality.

[@KeysightLabs]

There's not necessarily a quality tradeoff with switchable probes. But while in 1:1 mode probes generally have a lower bandwidth than in 10:1 mode.

[@rishabbajaj9371]

I made a sine wave oscillator connected to a rc phase shifter at 3 phase signal gets a lot of noise and attenuation if a compare attenuation of 1st and 3rd phase it's like 250 times

[@henryrobinson9837]

this is way out of my pay grade,but do you have any ideas on reducing noise using clamp-on amp probes for an oscilloscope,this is for automotive applications,

[@PoojaVerma-rc9cd]

Very well explained.

[@shredderegypt3394]

I am doing project. Noise is big problem. I have implemented kalman filter and PID and still there is noise. I am using mpu 9250 DOF 9 axis. Can you help please.

[@sfmech]

Thanks. This is very useful.

[@Abdelrahman.mo97]

Can you tell me a one circuit that removes noise from input signal and obtains a rectangular pulse in the output ?

[@markgreco1962]

Erin, nice work.

[@Linkowiezi]

Simply awesome

[@aswingsharif6729]

"Reducing noise by sufficient grounding the probe.". Can I do this by connecting the ground probe into a metal plate put under the oscilloscope?

[@AutomticHeart]

Noice explanation.

[@tapanprsd1]

I really enjoy this presentation, very informative.

[@agstechnicalsupport]

We are looking for an experienced "electronic noise consultant" who would be assigned to a project involving our client's product. It is a contract based opportunity with good hourly pay. The issue is challenging as our client could not get rid of the electronic noise for some significant time. If you or someone you know of, with solid background in electronics and especially noise troubleshooting and elimination is available, please let us know by responding here to this message and let us provide you more details to see whether this would be a good project for you. Thank you in advance if you are willing to help us !

[@6alecapristrudel]

How about thermal noise from the 10x/100x probe attenuator resistor itself? Or is that too small to be noticed?

[@KeysightLabs]

That generally doesn't tend to be a factor for probes, but we do recommend warming up your scope before use.

[@Boretoto]

Happy New Year! Excellent! Thank you. I have an entry level DSO. So I need to measure only analog audio signals up to 20 Khz. Could you suggest me a better scope with good FFT function not too expensive (with more parameters like THD, THD + Noise, etc.. not only Freq... on screen like major part of the cheaper scopes). I use software FFT to measure the THD of my sound interfaces, but the measurement I made is not exact. I tried different quality cables to looping the I/O of the sound cards, but the harmonics noise level exceeds the norm. Any suggestion about this problem ? Thank you so much!

[@0xbenedikt]

Keysight EDUX or Siglent SDS1202X-E. I've owned the latter before. It's a nice, cheap scope (albeit not as nice as Keysight or R&S gear ;) Most of my other test equipment is from Siglent (including a waveform generator, bench multimeter, portable scopemeter and power supply) and I am very happy with it.

[@Boretoto]

@@0xbenedikt, Thank you!

[@DoctorThe113]

Perfecto

[@a1nelson]

This is a well-made video, but this part can’t be possibly correct kzbin.info/www/bejne/qYizg3SBlt52ackm16s or can it? The pipeline should result in the SNR decreasing, or am I missing some important detail?

[@KeysightLabs]

Good catch! The SNR is lower, the noise is higher.

[@khaliffoster3777]

So, higher noise is higher volt, but less signal, so the volt is high which cause higher signal feedback so you hear more, so that is called noise something you can hear, well, base on old time of noise that is annoying, so the noise which is annoying that is up and down alot and in high frequently, which cause higher volt thru to cause higher noise output, so input and output volt is higher. So, that is noise is? You put higher volt to cause signal to happen, so volt is necessary, but in middle is noise so need to be reduce?? There is paradox relationship high volt and high frequently is necessary, but high frequently is not since will cause higher vary of output. Less direction output relative to degree that is 360, 180, well, focus one half plane that is 180, so 180, 90, 45, etc, so the output within low degree with high volt.

[@MatSmithLondon]

This comment is best read aloud with a really comical thick faux-non-English accent. Thank me later.

[@generator73]

please somebody can explain to me what is clock, gate, sync, and trigger in outputs used for ?

[@uhf001]

very sad...

[@Shim267]

Please refrain from letting anyone except for Erin host these videos. Strangely, for reasons I can't explain, I manage to stay for the entire length of the video and retain almost all of its information when she presents it.

[@minkorrh]

Funny how no one in the comments sees the agenda.

[@KeysightLabs]

Haha, people tend to comment while watching instead of after, it seems

[@kamalmanzukie]

*you're

[@KeysightLabs]

thank your