Phase shift - Phase Angle - Page 2 - Electronic Circuits Projects Diagrams Free

Papabravo · 6th December 2006, 10:33 PM

Quote:

Originally Posted by audioguru

For years I had my 'scope set to XY and showing the moving tangle of threads when it was connected to the output of my stereo. Sometimes it produced slowly turning ovals and other interesting displays.

OOPS, a few nights I forgot to turn off the 'scope and the brilliant dot in the center of the screen burned it a little.

Early Onset Alzheimer's Disease appears to be a widespread affliction. My sympathies for the hole in the scope.

audioguru · 6th December 2006, 10:54 PM

Quote:

Originally Posted by Papabravo

Early Onset Alzheimer's Disease appears to be a widespread affliction. My sympathies for the hole in the scope.

I was a teenager and it is a minor tan coloured brown spot that is slightly dimmer than the rest of the screen. It is hardly noticable. I have had my 'scope for about 42 years since I made it and it still works fine.
I think all this chatting keeps my mind alert.

Russlk · 6th December 2006, 11:33 PM

Some years ago I worked in a computer repair shop that had a device called "Huntron" (the manufacturer). It used Lissajous patterns; I think the idea was to measure the nodes of a good board and compare with a bad board (YUCK!). I thought it was a neat device, so I made my own:

windozeuser · 7th December 2006, 04:35 AM

thanks for your replies

, In measuring phase angle each grad if you had 10 would be 36 degrees correct? How exactly do you measure it.

Russlk · 7th December 2006, 11:09 PM

Connect the reference signal to the A channel and the phase signal to the B channel. Adjust the sweep so the reference spans 10 units (centimeters on most scopes). Read the phase difference at the zero crossings, the peaks are not as easily measured. In this case I used a 4.7uF cap in series with 1K and measured across the 1K with channel B.

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7th December 2006, 04:35 AM	(permalink)
windozeuser	thanks for your replies , In measuring phase angle each grad if you had 10 would be 36 degrees correct? How exactly do you measure it.