Hi, guys.
I need to measure the phase diference of two electrical signals A & B, with same frequancy - 40kHZ, signal A = 5.5 V - Urms, signal B = 8.7V - Urms. Can you give me the chematics to realise the masuring of the two phase diference in practice? Sorry for my broken english.

 

For example i want to use cathode-ray oscilloscope method, but i cant find the practice chematic to realise it. http://boson.physics.sc.edu/~hoskins/demos/cathoderay.html

 

If your scope has two channels, you can feed each signal into its own channel. Another method sets the sweep with one signal and the other signal to the input. Look up lissagous patterns (https://www.google.com/webhp?source...pv=2&ie=UTF-8#newwindow=1&q=lissajous+pattern ).

JOhn

 

We would use a double beam scope as in #3 to create a Lissajous figure in order to align the early quadrature (90°) measuring scales, they had incandescent lamps so when replacing a dud lamp the Lissajous figure was used to create the 90° 1:1 circle in the list shown.

Max.

 

Hi,

Just wondering, are there any limitations on the amount of phase shift possible? For example, max 90 degrees, max 60 degrees, etc.

 

Hi,

Just wondering, are there any limitations on the amount of phase shift possible? For example, max 90 degrees, max 60 degrees, etc.

Depends on the ratio between the two as to how readable it becomes, the 1:1 shows 0-360 possible.
Max.

 

Is it just the amount of shift that is needed, or do you need to know the direction of the shift?

 

Depends on the ratio between the two as to how readable it becomes, the 1:1 shows 0-360 possible.
Max.

Hi there,

Sorry my 'bad', i meant that question to go to the OP in case their problems had limited phase angles in which case there may be other ways to measure the phase angle.