Any clues as to why i have so much noise on my waveform

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Any clues as to why i have so much noise on my waveform

Postby Columbus » Mon Mar 17, 2014 5:38 pm

206 lambda.jpg
screen shot of lambda probing

peugeot 206 1.4 lambda back probed at connector and earthed at the battery but the amount of noise is ridiculous tried a couple of different earths and different croc clips??
ta very much
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Re: Any clues as to why i have so much noise on my waveform

Postby arjen » Mon Mar 17, 2014 6:03 pm

Use a filter to get a cleaner signal. Lambda signals can be very noisy.
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Re: Any clues as to why i have so much noise on my waveform

Postby Columbus » Mon Mar 17, 2014 6:56 pm

how do i do that?
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Re: Any clues as to why i have so much noise on my waveform

Postby arjen » Mon Mar 17, 2014 7:27 pm

Click on the channel number above the waveform. There you can activate the filter.
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Re: Any clues as to why i have so much noise on my waveform

Postby Columbus » Mon Mar 17, 2014 7:43 pm

thanks :)
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Re: Any clues as to why i have so much noise on my waveform

Postby Robski » Mon Mar 17, 2014 8:05 pm

If all you're scoping is the O2 sensor then you can use it's own ground for a cleaner signal, I don't worry about much noise on an O2 & just add a filter.
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