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# Questions tagged [rms]

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1 vote
62 views

### What is the relationship between RMS level and amplitude?

I have an Android recorder project, and I'm trying to implement a waveform display for recording and playing audio. During recording, I chose to use ...
18 views

### How to produce a noise spectrum from an rms velocity specification?

For a dynamic model I am looking at the appropriate input to analyse the performance under the influence of floor vibrations. The norm is an ISO VC-C floor spectrum as displayed in the image. However, ...
• 1
82 views

### Discrepancy between time & frequency domain RMS magnitude

I'm looking at complex baseband RF at a sample rate of 2.56 MHz. I've plotted the FFT of the entire spectrum, a 16 kHz segment of that spectrum, and the output of 160 decimation low pass filter that ...
• 153
1 vote
57 views

### Spectrum and Fourier transform of a sine wave

Take for example: $x(t)=A\sin(2\pi f_0t)$. The Fourier transform of this signal is $\hat{s(f)}=\frac{A}{2i}(\delta(f-f_0)-\delta(f+f_0))$. If we want to represent the spectrum of the signal we would ...
39 views

### Vrms, RF power and PAPR of Random bit string Votlage signal

I have a random bit string which is being generated by an arbitrary waveform generator (AWG), being amplified by an RF amplifier to drive an optical phase modulator for binary phase shift keying ...
1 vote
163 views

### How to minimize RMS calculation error due to sampling?

Say I have a sinusoidal signal of 49.93 Hz, which is sampled at 16 kHz. A period of the input signal would then contain 16000/49.93 = 320.448 samples. Naturally, the number of samples has to be an ...
• 11
118 views

### In the RMS bandwidth equation, why do we have the energy of the signal in the denominator?

In the following equation: $$B_{\rm rms}^2 = \frac{\displaystyle\int_{-\infty}^\infty f^2\lvert G(f)\rvert^2df}{\displaystyle\int_{-\infty}^\infty \lvert G(f)\rvert^2df}.$$ It is not clear why do we ...
• 25