Schniz2
Aug8-08, 02:29 AM
This is a question i asked my tutor via email... kind of in a hurry to get it answered so i can fully understand causality for an assignment due on monday.
i'm having trouble understanding the causality of the attached tutorial question...
if there is an input 'x(t)', for any 't<0' is this input zero? in the tutorial you wrote:
"say t < t1, x(t) = 0
lambda < t1, x(lambda) = 0
"
i'm not sure what you are referring to as 't1'... is this just an arbitrary time after 't = 0'? or is 't1' the origin of the input signal and any input signal before 't1' is zero.
if it is an arbitrary time after t = 0, how are we allowed to say that for 't < t1, x(t) = 0'?
Very grateful if anyone is able to help... cheers ;)
****Hmm, maybe this should have not been in this area... couldn't decide whether it was a homework question or just a question about the concept of causality :S****
i'm having trouble understanding the causality of the attached tutorial question...
if there is an input 'x(t)', for any 't<0' is this input zero? in the tutorial you wrote:
"say t < t1, x(t) = 0
lambda < t1, x(lambda) = 0
"
i'm not sure what you are referring to as 't1'... is this just an arbitrary time after 't = 0'? or is 't1' the origin of the input signal and any input signal before 't1' is zero.
if it is an arbitrary time after t = 0, how are we allowed to say that for 't < t1, x(t) = 0'?
Very grateful if anyone is able to help... cheers ;)
****Hmm, maybe this should have not been in this area... couldn't decide whether it was a homework question or just a question about the concept of causality :S****