Controls
  1. Plot Box: MOTOR
  2. Plot Box: SAMPLES
  3. Plot Box: Continuous Time Spectrum
  4. Plot Box: Discrete Time Spectrum
  5. Motor Frequency (Hz)
  6. Motor rotations/min
  7. Flash Frequency (Hz)
  8. Flashes/min
  9. Fine
  10. <-a s->
  11. <-k l->
Plot Box: MOTOR

This plot displays graphical representation of a disk attached to the shaft of a Motor with a radial arrow representing a mark placed on the disk. The direction of the rotation of the disk is depicted by the solid arrow.

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Plot Box: SAMPLES

This plot shows the arrow SAMPLES displayed whenever the strobe light flashes. If no aliasing has occurred, then the direction of the rotation of the arrow is clock-wise.

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Plot Box: Continuous Time Spectrum

This plot shows the arrow's frequency spectrum in Hz. A 'yellow' band indicates the flash frequency range -fs/ 2 to fs/ 2. The arrow's rotating frequency is indicated by 'blue' impulse (stem) plots.

A similar spectrum for the sampled disk is also shown at the bottom-right corner of the GUI.

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Plot Box: Discrete Time Spectrum

This plot shows the spectrum of the discrete (sampled) arrow angular frequency. This spectrum also has a yellow band indicating the range -fs/ 2 to fs/ 2. The arrow's angular frequency is indicated using 'blue' impulse (stem) plots and the aliases of this frequency are indicated using 'red' impulse plots.

If the output signal has been aliased, then, a text 'ALIASING!' is displayed in this plot.

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Motor Frequency (Hz)

This edit-box can be used to set the motor frequency of the disk in Hz. The maximum value can be 1.5 times the flashing frequency.

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Motor rotations/min

This slider/edit-box can be used to set the rotations per minute of the motor.

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Flash Frequency (Hz)

This edit-box can be used to set the flashing frequency of the strobe in Hz. The maximum value that can be specified is 70Hz.

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Flashes/min

This slider/edit-box can be used to set the number of flashes per minute of the strobe. The maximum value that can be specified is 4200 flashes per minute.

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Fine

This radio-button can be used to change the step-size of Motor rotations/min or Flashes/min sliders, thus allowing for slowly varying GUI's parameters. This feature has been primarily designed for fine-tuning GUI parameters to hardware-based demonstration.

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<-a s->

Keyboard keys a and s can be used to advance the Motor rotations/min slider.

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<-k l->

Keyboard keys k and l can be used to advance the Flashes/min slider.

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