Hi,

You have to use shield cable and ground it properly. That is the only
way to prvent this type of noise. I use cat-5e cable with shield to do
this.

Regards,
J=F3n Fr=EDmann.

On mi=F0, 2011-01-05 at 15:11 -0800, Richard Schneider wrote:
> Situation:  High amplitude spikes when starting and again on shutdown
> of engine from automobile.
>=20
>  Sensor is about 3 feet from car.
>=20
> EMF appears to come from auto alternator since I can see it upon
> engine shutdown.
>=20
> Any suggestions would be appreciated to mitigate the EMF from the
> sensor pickup coil without relocating it.
>=20
>  How about a lead shield?  The kind the dentist uses for X-ray's.
>=20
>=20


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