bilal_oct
Full Member level 1
Hi,
This probably a basic question about the relation between bandwidth and sampling time. I understood the following terms.
Sampling time: Time between two consecutive samples while sampling a signal periodically
Sampling frequency: Reciprocal of sampling time
I am using a magnetic field instrument in which I select f_low = 100 Hz and f_high = 500 Hz.
a) If I select bandwidth 10 Hz, I get data points at frequency 100 Hz, 105 Hz, 110 Hz and so on.
b) If I select bandwidth 30 Hz, I get data points at frequency 100 Hz, 115 Hz, 130 Hz and so on.
Text book says use narrow band filter to avoid aliasing but if the data points are close like in case (a) then how narrow band filter or bandwidth can cope with aliasing ?
I am also wondering the relation between sampling time and bandwidth. Please help me to understand this concept.
This probably a basic question about the relation between bandwidth and sampling time. I understood the following terms.
Sampling time: Time between two consecutive samples while sampling a signal periodically
Sampling frequency: Reciprocal of sampling time
I am using a magnetic field instrument in which I select f_low = 100 Hz and f_high = 500 Hz.
a) If I select bandwidth 10 Hz, I get data points at frequency 100 Hz, 105 Hz, 110 Hz and so on.
b) If I select bandwidth 30 Hz, I get data points at frequency 100 Hz, 115 Hz, 130 Hz and so on.
Text book says use narrow band filter to avoid aliasing but if the data points are close like in case (a) then how narrow band filter or bandwidth can cope with aliasing ?
I am also wondering the relation between sampling time and bandwidth. Please help me to understand this concept.