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Anonymous Poster

CRO Output

05/20/2008 2:49 PM

in output of CRO i cant get the sine wave if i use 230/9 V transformer.........can u pls tell me the reason whether there may no continuity in transformer or some other problem in transformer.........the working of CRO is proper when i checked.....
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Electroman
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United Kingdom - Member - Olde Member!! Engineering Fields - Instrumentation Engineering - New Member

Join Date: Jul 2006
Location: Dunstable, England
Posts: 2821
Good Answers: 45
#1

Re: electronics and communication

05/20/2008 2:52 PM

Is one end of the 9 volt winding earthed?

If it isn't then it will be floating and the 'scope probe needs to 'see' a signal with respect to earth.

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Deepti Saini
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Join Date: Apr 2008
Posts: 9
#2

Re: CRO Output

05/22/2008 6:11 AM

Firstly, I want to ask you : whether your transformer is centre-tapped i.e. Is it having three wires in the O/P side or it is having only 2 wires.

In case of centre tapped, the O/P of X-mer will not be full sine wave but it will only be the half sine wave of complete 9V( +ve or -ve depending on the knob that you have selected from O/P of X-mer).

In case of a simple X-mer the O/P will be ac sine wave varying from 0V to 4.5V to 0V & then the same in negative direction.

If some different O/P is coming in the CRO O/P, then, first describe me what kind of shape you are getting on the CRO, so that I may tell you the exact problem & its cure.

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