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Ferrite Core Filter On A Coil Cable

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Why would it just be on the GPZ and the GPX and not the 4500's and 4000's etc.? If that is because of a governmental mandate it should be easy to find out.

 

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I can't see anything on the ACMA website where the use of ferrites is a requirement.

They do recommend the use of both internal ferrite beads & RF chokes (or filters) on external leads made from ferrite material - like the clip on ferrites used on coil cables - for equipment that is having RF transmission interference issues. 

Given that detectors can both emit & receive RF then they probably recommend ferrites as being a good preventative idea?

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Ferrites are often used to pass EMI compliance testing. During compliance testing (ACMA, FCC, CE, IC, etc) the detector is tested in a chamber for EMI emissions over a broad frequency spectrum and its "noise emissions" must remain below a certain level. The ferrites are strategically added to achieve this. Emissions are especially bad for PI and somewhat for MF designs, not so much for VLF. Performance-wise, ferrites probably make no difference.

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1 minute ago, Geotech said:

Ferrites are often used to pass EMI compliance testing. During compliance testing (ACMA, FCC, CE, IC, etc) the detector is tested in a chamber for EMI emissions over a broad frequency spectrum and its "noise emissions" must remain below a certain level. The ferrites are strategically added to achieve this. Emissions are especially bad for PI and somewhat for MF designs, not so much for VLF. Performance-wise, ferrites probably make no difference.

Awesome Thanks Geotech!!!! I appreciate your information.

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