# Pulse waveform question

Discussion in 'Homework Help' started by skiddman, Sep 14, 2013.

1. ### skiddman Thread Starter New Member

Nov 7, 2012
26
0
How do you measure the rise and fall time and the quantity of tilt of a wave form

I have the volt/div and sec/div as well as the capture of the waveform just not quite sure how to calculate.

2. ### vk6zgo Active Member

Jul 21, 2012
677
85
For the risetime,you measure the time interval between when the rising voltage is at 10% of its final value till it is at 90% of its final value.

Fall times are,logically, measured from 90% to 10%.

The idea is to ignore any artifacts around the start & finish of the rise or fall.

Tilt is measured by setting the amplitude between 0 volts (the baseline) & the maximum amplitude of the waveform as 100%,then measuring the difference between max & min levels of the flat top in %.

Obviously,the waveform must have a nominally flat top of a reasonable duration.
Any artifacts just after the rise,or just before the fall are ignored.

3. ### skiddman Thread Starter New Member

Nov 7, 2012
26
0
thank you I appreciate the help