Need to measure time between maximum and minimum value

[Zebel]

Hi 

I am new with AD2 and love using is so far.

I need to create a measurement script to measure the time between minimum and max values. rise time function does not work correctly for my application for some reason.

thank you in advance.

thanks

 

[attila]

Hi @Zebel

The Rise/Fall times measures the 80% path, between 10-90% This because the signals have linear range in about this region.
You can add a custom measurement with: Channel.measure("RiseTime")/0.8

 

[Zebel]

thank you so much for replying back, and yes now it shows correct number. I just want to know a bit more about the custom measurment you added, the rise time that measured is 25.7uSec and based on your formula it should be 25.7uSec/0.8 = 32.125uSec but in the measurement windows it shows 5.56mSec ( which is correct based on the manual measurement ), I am still confused how this formula works and I would really appreciate it if you can explain it a bit more to me.

thank you. 

[attila]

Hi @Zebel

See the following:
https://en.wikipedia.org/wiki/Rise_time
http://www.radioradar.net/en/measurements_technics/oscilloscope_measurement_fundamentals.html#lnk8

The earlier /0.8 approximates total linear rise time based on the 10-90% measurement.

[Zebel]

On 8/19/2020 at 1:42 AM, attila said:

Hi @Zebel

See the following:
https://en.wikipedia.org/wiki/Rise_time
http://www.radioradar.net/en/measurements_technics/oscilloscope_measurement_fundamentals.html#lnk8

The earlier /0.8 approximates total linear rise time based on the 10-90% measurement.

thank you.