Description
- Move Frequency ratio slider to change frequency of the input signal to be sampled (black sinewave) in relation to sampling rate (red lines).
- Move Sampling cycles slider to change sampling rate in relation with the represented width. The green line shows the reconstructed signal as sampled.
- Blue dots show sampling points, and related sampled values are shown below. Unckech Dots to hide them.
- Max count sets the maximum count of the analog to digital conversion, which affects resolution.
At very high density (highest sampling rate) shown values may overlap making them unreadable, but the purpose at that rate is to visualize how the
reconstructed waveform is affected by the sampling rate. Uncheck Dots to make it less crowded.
Hints
See development of aliases
- Uncheck Dots at higher sampling rate.
- Click on Frequency ratio's thumb and then keep keyboard arrow left or right pressed to see
an animated development of the output signal (green line), both at low and high sampling rate.
See oversample
- Bring sample rate to display 96 cycles.
- Bring Max count to 32 (5 bits) or below. This helps visualization and simulate a low physical resolution.
- Bring Frequency ratio at 0.0124 (using arrow keys is easier for this purpose). Notice how multiple samples have the same value.
- Add noise checking Noise. Notice now there are no longer duplicated samples and sampled waveform has more information.
Please note that this is a simulation and it is not an exact emulation of the real process.
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