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signal to noise ratio measurement

Discussion in 'Electronic Basics' started by [email protected], Jan 21, 2007.

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  1. Guest

    I was just wondering if there is an easy way to automatically measure a
    signal to noise ratio. I'm looking for a means that doesn't require
    human intervention.

  2. chuck

    chuck Guest

    S+N/N measurements can be automated, more or less. What kinds of
    signals, noise, and channels are you thinking about? What accuracy and

  3. Phil Allison

    Phil Allison Guest

    ** Groper in the Dark Alert !

    ** The s/n ratio of an actual signal ( as opposed to an equipment spec) is
    usually continually varying !!!!!

    A good spectrum analyser will take a snapshot of the signal +noise at any
    point in time and then the display can be interpreted ( in most cases ) to
    give the approximate s/n ratio at that moment.

    All depends on the exact nature of the wanted signal and the characteristics
    of the noise.

    ......... Phil
  4. neon


    Oct 21, 2006
    An amplifier can have a spec of -90Db power rejection ratio. how you verify is by injecting a signal and measuring the output. then again at 100 mhz and above it can be -10Db then again a 100mhz amp is hard to come by.
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