Key questions to think about before viewing video below:
How is the spectrum of the sampled signal output related
to the spectrum related the original signal?
A multiplication of two time signals is what type of
operation in the frequency domain?
What is the convolution between an impulse and some
function?
Can any periodic sampling function will work as long as it
meets the Nyquist Criteria?
What is the Nyquist Theorem?
If I pass a signal that has been appropriately sampled and
pass the signal through a bandpass filter centered at the sampling
frequency, what does the output of the bandpass filter look like?