Pocket size O'scope

Discussion in 'General Electronics Chat' started by dick56, Sep 2, 2012.

  1. dick56

    Thread Starter New Member

    Apr 27, 2011
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  2. #12

    Expert

    Nov 30, 2010
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    The advertisement says, "Approximately US $79.40"

    Did you have a question?
     
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  3. nobody0608

    New Member

    Aug 4, 2012
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    Is it suitable for a student to purchase and use that?

    Thank for answering! =)
     
  4. crutschow

    Expert

    Mar 14, 2008
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    The analog bandwidth is only 1MHz which is low for an oscilloscope. It would be suitable only for audio or other low frequency analog signals. it would not work well for any digital signals.
     
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  5. nobody0608

    New Member

    Aug 4, 2012
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    I see, thank for pointing out. =)
    Btw, those oscilloscope that can measure the digital signals very expensive, is it?

    Added:
    If I want to search for an oscilloscope that are capable to work for digital signals, what kinds of specification that I need to take note?
     
    Last edited: Sep 3, 2012
  6. dick56

    Thread Starter New Member

    Apr 27, 2011
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    What is the difference between analog bandwidth and measured bandwidth width which on this scope is 0-72MHZ ?
     
  7. #12

    Expert

    Nov 30, 2010
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    It doesn't say, "measured bandwidth". It says, "measuring range" and I think it's a lie.

    If the maximum sample rate is 1 mega-sample per second, how many samples will it take in 1/72,000,000 seconds?
     
  8. crutschow

    Expert

    Mar 14, 2008
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    Also note that the maximum sweep speed of the ebay scope is 1μs/div, so anything over a 1MHz input will occupy more than one cycle per division, giving poor horizontal resolution.

    The OP might consider buying a good used oscilloscope or perhaps a new Chinese digital oscilloscope (although I understand some Chinese models have poor quality). You might also consider a digital oscilloscope plug-in for a PC, which would be cheaper. Here's a discussion about scopes that may be of interest.

    For digital work, it depends upon the frequency of the digital signals. For example a scope analog bandwidth of 50MHz would work for digital signals up to about 10MHz or so.
     
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  9. THE_RB

    AAC Fanatic!

    Feb 11, 2008
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    It's a lot better than nothing for sure, and the "pocket" portability might be great for a student. I wish they had existed when I was a student. :)

    You can observe things like mains freq and audio waveforms, motor drivers, many types of digital waveforms, serial data in/out etc. I have full size 50 and 100MHz 'scopes and use them a lot, and I would say 95% of the time I'm looking at something far less than 100kHz.

    I don't own one, but from a first glance the main down-side would be the tiny little screen. But for something cheaper and smaller than many multimeters as a little 'scope it would be a heck of a lot better than nothing.
     
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  10. nobody0608

    New Member

    Aug 4, 2012
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    Well, actually I am just trying to look for the o'scope that I can affordable. Cannot even go to lab daily as it far away from my dorm (about 30km away). It's quite very difficult to proceed when doing a project without an o'scope, since the waveform have to imagine by self (sometime the imagined waveform was totally wrong).

    Trying to look for more info so that won't purchased an o'scope that totally cannot used for most of my applications.

    Thank for sharing. At least I gained something useful =)
     
  11. crutschow

    Expert

    Mar 14, 2008
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    You might consider a USB oscilloscope such as this, that uses your computer to display the waveforms. It's more expensive, but it has a much greater bandwidth.
     
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  12. nobody0608

    New Member

    Aug 4, 2012
    28
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    Sorry for using other people's post to ask my questions.
    Initially, I thought I could just ask some questions related to the original post, but the subsequent questions that I wanted to ask is totally digress.
    So, I opened a new thread.
    I hope that you can solve my puzzle in this post.

    Thank for your helping =)
     
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