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  • What is the difference between the terms wave, waveform, and signal?
    A waveform is a representation of physical quantity such as voltage or a current over time If this physical quantity carries information then it is a signal In practice, however, the terms signal and waveform are often used synonymously
  • rf - What are the waveforms of radio frequencies? - Electrical . . .
    What is the waveform of radio frequencies? I thought they were sinusoidal; am I wrong? I started to wonder about radio frequency waves at the time (two years ago), if they were digital, because all systems are digital, but the problem was that radios were being used in World Wars I and II, and even before At that time, electronic devices were
  • waveform - Peak and RMS voltage for a sine wave - Electrical . . .
    As Peter says the integral looks like a constant plus a sinusoidal waveform (at twice the frequency) Which makes sense if you think about what the power looks like as the voltage changes- it's always positive, hence there must be an offset, and touches zero at the zero crossings
  • What exactly are harmonics and how do they appear?
    This is called Fourier analysis (if the original waveform is repeating) or Fourier transform (for any waveform) In case of a repeating waveform (like a square wave), when you do Fourier analysis you find that all the sines that compose the waveform have frequencies that are an integer multiple of the frequency of the original waveform
  • Calculating power and energy of a surge waveform
    This will be less true for a more rounded curve as IEC 61000-4-5 uses, where the 2nd-order exponential response is evident (depending on whether the exact waveform is 8 20, 1 2 50µs, or anything inbetween), and a different integration is required This all goes out the window when a nonlinear device, such as an SPD, is involved
  • dc motor - DC Machine Ouput Voltage Waveform - Electrical Engineering . . .
    (B) is a good candidate for the resulted waveform when the brushes are in positions A and B on the commutator The basic place of the brushes should give full voltage and minimize the sparking Just when one lamel leaves the brush, another enters and add the same voltage to the series connection which is dropped off at the same time
  • impedance - 50 Ω or high-Z setting on waveform generator? - Electrical . . .
    I have an arbitrary waveform generator that allows me to set the load as 50 Ω or high-Z This generator is connected to an amplifier that has as input an unbalanced BNC connector, 10 kΩ, single-ended I need to measure the signal I am sending to this amplifier My oscilloscope has the classical internal settings for 50 Ω and 1 MΩ
  • What Does 8 x 20-µs and 10 x 1000-µs Mean in Surge Testing Terminology
    standardized transient impulses (or sometimes it's called a waveform) But what does it actually mean Why is there a multiplier in front of the time unit? The quoted line above is constantly mentioned in surge testing document But no where in the document does it mention what is the meaning of it Most Google search results point to Datasheet
  • waveform - How to generate an impulse response in practical way . . .
    However it can be approximated with a narrow pulse The accuracy of the approximation depends on the bandwidth of the circuit you want to analyze with the impulse A reasonable rule of thumb is that the bandwidth of your circuit should be much less (say 1 10) than the reciprocal of your approximate impulse waveform
  • Calculating average power when given weird waveforms
    The average voltage and average current of a waveform with no DC component will be zero, but average power will always be positive, because the negative excursions of voltage and current are multiplied, providing a positive result \$\endgroup\$ –





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