Electrical Engineering - Oscilloscope

Author

Oscilloscope

viccourage

2007-03-30, 5:25 pm

I am comparing two out of phase signals using an oscilloscope. How
would I determine the time in seconds that one signal is leading
another.

JohnR66

2007-03-31, 3:25 am

"viccourage" <viccourage@yahoo.com> wrote in message
news:1175287449.523290.17510@l77g2000hsb.googlegroups.com...
>I am comparing two out of phase signals using an oscilloscope. How
> would I determine the time in seconds that one signal is leading
> another.
>
My scope allows me to set markers and it does the rest. Your scope may have
a ruled grid on the screen that you can read how distant the shifted waves
are. Knowing the time per divisions setting, you can easily calculate the
phase shift.

Paul Hovnanian P.E.

2007-03-31, 3:25 am

viccourage wrote:
>
> I am comparing two out of phase signals using an oscilloscope. How
> would I determine the time in seconds that one signal is leading
> another.

Connect each signal to an input of a dual trace scope. Set the trigger
on one of the inputs. Adjust the vertical positions of each trace to
make identification of each waveforms zero crossing points. Count the
number of horizontal divisions between each zero crossing and multiply
by the sweep rate seconds per division. Its best to use the fastest
sweep rate to stretch the waveforms out as much as possible for the
highest resolution.

--
Paul Hovnanian mailto:Paul@Hovnanian.com
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