Questions tagged [psd]

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What is the unit of power spectral density?

I have an oscilloscope data, I did plot in time domain, so that unit is in volts (Y axis). After that I took FFT. So now what will be the unit in Y axis? If I will do 10 log 10 (y axis) can it is ...
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What is the basic circuit to wire up a position-sensitive detector, or PSD?

I'm a software dev dabbling in electronics and I am looking into wiring up a position-sensitive detector, the Hamamatsu S3932, on a breadboard. My knowledge is quite rudimentary and my first goal is ...
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How to convert amplitude (V) to dB (V^2/Hz or V/sqrt(Hz) or V?)

I took the FFT of a signal and am currently plotting amplitude (V) vs. frequency (Hz). I'd like to change the Y-Axis units to dB. How would I go about doing this? What would be the units? It is from ...
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What is omega supression for a lock-in amplifier?

I'm using a lock-in amplifier for PSD measurements. The lock-in amplifier has an option for omega supression (in dB.) I'm unable to find resources on the lock-in amplifier's manual or online about ...
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1 vote
1 answer
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Noise Floor of ADC using PWELCH

While using MATLAB's Pwelch function, I am not able to match the noise floor of the "Modelled" ADC to (Delta)^2/6 {1 sided Spectrum}. ...
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PSD vs FFT of voltage magnitude squared and oscilloscopes

Imagine we have a time-domain signal which is a voltage signal. Now if we sample this at the correct rate, and taking the Fourier transform gives us the magnitudes of various frequency components ...
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