Waveform Hash

Mervin Owner/Technician Harlan, Indiana Posted   Latest   Edited  
Unsolved
Driveability
2011 Ford F-150 Harley-Davidson Edition 6.2L (6) 6-spd (6R80) — 1FTFW1E65BFB07332
Waveform Hash

Hello To all, hope your Thanksgiving is going well and you are Blest!

Been trying to gather a few Known good files on some time off...... however i am getting this bad hash after vehicle starts up, KOEO is perfect as you can see, my grounds are connected to a signal return at the PCM, tried the battery as well....... just want to have the best files i can. Any and all info/ help would be great....!

Mervin

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Interesting
Edwin Mobile Technician
Charleston, South Carolina
Edwin Default
 

Do you have the filter turned on?

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Mervin Owner/Technician
Harlan, Indiana
Mervin Default
 

You mean on each channel as I record ?

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Edwin Mobile Technician
Charleston, South Carolina
Edwin Default
 

Yes. What scope are you using

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Mervin Owner/Technician
Harlan, Indiana
Mervin Default
 

Pick 4425, here is a few shots of my setup let me know if you see something of concern

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Justin Mobile Technician
Herriman, Utah
Justin Default
 

Sometimes the bnc to banana adaptors are not the cleanest. I would recommend picking up a new set of leads from Aeswave.

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Dick Technical Support Specialist
Québec, Quebec
Dick Default
 

Try some low pass filtering. Increase frequency until pattern "cleans up".

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Caleb Diagnostician
Mishawaka, Indiana
Caleb Default
 

Not sure what filtering or sample rate you are using. But those can both play a big factor into what you are trying to accomplish with the signal.

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Stephen Technician
Gallatin, Tennessee
Stephen Default
 

I think that most of the noise is ignition radiation. It could come thru magnetic/capacitive pickup and/or thru the ground connection(s). Things to try are; only connect one of the scope lead grounds, leave the others not connected. At the minimum, connect all grounds to the same point or stack the ground bananas. Connect ground lead to as close to the ground for the measured signal as…

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Randy Diagnostician
Glendora, California
Randy Default
 

Had the same problem using hanteek leads bought a new set of leads from aes wave and no more problem

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Mervin Owner/Technician
Harlan, Indiana
Mervin Default
 

Hello to all, So the very reason I am scoping for is to learn what good looks like ......... in this case I did just that , I was scoping a ETC drive motor on both the control wires and the signal wires ....... the noise comes from the drive motor control wires, I was not aware of how extremely fast the duty cycle of this is , so in conclusion when scoping this component the answer was to…

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Hollis Technician
Boulder, Colorado
Hollis Default
   

Hash, Ford and A/F sensor's, starting at page 65 there may be some info you're looking for. fordservicecontent​.​com/ford_content/c…​.​pdf

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