Data Acquisition

Question 1

what does it mean for h(t) to be bandwidth limited

Answer 1

the FT of h(t) is non-zero over a finite range of frequencies

Question 2

if h(t) is bandwidth limited, there exists a critical frequency fc such that

Answer 2

H(f)=0 for all |f| > or = fc

Question 3

if sampling rate is much higher than f then

Answer 3

the signal is reasonably represented

Question 4

Nyquist-Shannon sampling theorem

Answer 4

If a band limited signal of maximum frequency fc is periodically sampled every T seconds where T<1\2fc or f>2fc

then these samples can be used to reconstruct the original signal
without any distortion

Question 5

alias effect

Answer 5

reconstructing the wrong apparent frequency from samples