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Author Topic: Oscilloscope - LINE trigger  (Read 2261 times)

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Offline sebinmathewTopic starter

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Oscilloscope - LINE trigger
« on: April 24, 2014, 05:04:19 pm »
Can somebody answer this.

An oscilloscope is powered from 230V, 50Hz.  Triggering mode is set to LINE. A square wave from a signal generator is fed into the Y-input of the CRO and a stable display is obtained when the frequency of signal generator is 297 Hz.  Assuming the signal generator to be error free, what is the actually frequency of power supply?

Kindly help with this.
Thank you :)
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Offline Anks

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Re: Oscilloscope - LINE trigger
« Reply #1 on: April 24, 2014, 06:01:04 pm »
Any signal that is a multiple of the supply frequency should be stable just with more cycles on the screen the higher you go.

So if the generator is correct the line supply freq is 49.5Hz
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Offline Anks

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Re: Oscilloscope - LINE trigger
« Reply #2 on: April 24, 2014, 06:02:48 pm »
Have I just answered your homework.
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Offline KedasProbe

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Re: Oscilloscope - LINE trigger
« Reply #3 on: April 24, 2014, 06:07:11 pm »
Whose homework is this, yours?
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Not everything that counts can be measured. Not everything that can be measured counts.
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