determine rise & fall time of the signal at low frequencies

[samtha]

Hi i have used the transition measurement function to determine the rise and fall time of the signal but it doesnt seem to work at low frequencies for example at 0.5 or 1hz the signal doesnt seem to have enough edges to perform the operation can anyone suggest me a way to cal rise time or fall time of the

signal..........here i am attaching my vi's pls check it out 

Message Edited by sk_labview on 08-29-2009 01:59 AM

[pine]

Would you please to save you acquired data and remove DAQmx related part? 

The key is to use your acquired data to reproduce the problem, other than how you acquire the data.  

[johnsold]

It looks like you are acquiring one second of data.  That means that you have exactly one cycle at 1 Hz and less than one cycle at lower frequencies.  If you want to make measurements on low-frequency signals you need to collect more data.

What happens if you collect 4-5 seconds of data?

Lynn 

[samtha]

sorry for the late reply and thank you for your response(pine & johnsold) i understood the problem and solved it thanks anyway.........

Message Edited by sk_labview on 09-19-2009 12:27 AM