- #1
-EquinoX-
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Homework Statement
I am asked to measure T1, T2, Tbeat, and Tbar using oscilloscope.
Can anyone tell me what these means?
-EquinoX- said:ermmm.. the picture didn't show up
Redbelly98 said:Sorry!
George has posted an equally good picture. But just to prove to everybody that I'm not a completely stark raving lunatic , here is the image I meant to include:
http://www.picotech.com/experiments/sound_interference/graphics/frequency_image.gif
-EquinoX- said:Ok I just realized that T_bar is just the average of T1 and T2, is there a specific way to know this in an osciloscope? Or do I just simply measure T1 and T2 and do the math on paper?
-EquinoX- said:no way to see it on the scope?
George Jones said:I think I can be more clear by using the image
http://en.wikipedia.org/wiki/File:Beating_Frequency.svg,
which should be similar to what you see on the scope when you sum channels 1 and 2.
There are two characteristic time periods in this image, the time between consecutive black peaks, and the time between consecutive orange peaks. Measure both these periods with the scope. Which is which?
-EquinoX- said:you mean one is T_beat and one is T_bar?
-EquinoX- said:in that case the black one is T_beat and orange is T_bar, is this correct?
To find the beat frequency for two waves of periods T1 and T2 using an oscilloscope, you will need to measure the time difference between the peaks of the two waves. This time difference, also known as the phase difference, can be used to calculate the beat frequency using the formula fbeat = 1 / (T2 - T1).
The beat frequency is used to determine the difference in frequency between two waves. This can be helpful in analyzing and understanding the characteristics of different waveforms, such as sound or electromagnetic waves.
Yes, any oscilloscope with the ability to measure time differences between two waves can be used to find the beat frequency. However, more advanced oscilloscopes may have additional features that can make the process easier.
The accuracy of the beat frequency measurement will depend on the accuracy of the oscilloscope's time measurement and the precision of the waveforms being analyzed. Generally, modern oscilloscopes have high accuracy and can provide precise measurements.
No, the beat frequency only tells you the difference in frequency between the two waves. To determine the individual frequencies, you will need to use other methods such as Fourier analysis or frequency counters.