Can I see PWM on my scope?

Discussion in 'General Electronics Chat' started by GRNDPNDR, Apr 11, 2014.

  1. GRNDPNDR

    Thread Starter Member

    Mar 1, 2012
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    Just a random thought, I have a 60Mhz scope, but PWM controllers are high frequency.

    Does this mean I would not be able to view the waveform of a 13Khz PWM controller?
     
  2. Alec_t

    AAC Fanatic!

    Sep 17, 2013
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    Shouldn't be a problem if the pulse width stays constant for the period of observation.
    If not, it depends on the functions available on your scope. Does it have a capture function? Can the timebase be set to trigger at a particular pulse duration?
     
  3. GRNDPNDR

    Thread Starter Member

    Mar 1, 2012
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    ummm... I'm not entirely sure. It does have a capture function though.
    It's a Tektronix TDS1002b
     
  4. ErnieM

    AAC Fanatic!

    Apr 24, 2011
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    Umm, as 60,000,000 > 13,000 you should have no problem seeing this signal on any scope made after 1960.
     
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  5. GRNDPNDR

    Thread Starter Member

    Mar 1, 2012
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    I can't believe I'm seriously that stupid.

    Yes, I guess MHz is greater than kHz isn't it.

    I need a double facepalm pic
     
  6. bance

    Member

    Aug 11, 2012
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    Only by an order of magnitude....

    DOUBLE DOULBLE face palm.....

    We all do it!!!!!
     
  7. Brownout

    Well-Known Member

    Jan 10, 2012
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    If not, it'll look like jitter. But one might be able to recognize a pattern. I was able to do that while observing repeating serial data.
     
  8. ErnieM

    AAC Fanatic!

    Apr 24, 2011
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    As requested:

    [​IMG]
     
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  9. GRNDPNDR

    Thread Starter Member

    Mar 1, 2012
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    Thank you sir, That sums it up nicely lol.
     
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