HDMI Cable EMI compliance performance

Mike's picture

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Joined: Jul 07, 2020

Replies: 0
HDMI Cable EMI compliance performance
July 7, 2020 - 11:50pm

Hi!

 

It seems as my device is currently failing Radiated EMI certs when the HDMI cable is plugged in. Even Ferrites don't help much, according to the tech who tested it.

We have supplied thecable and it is your standard inexpensive 6' cable



I've done some reading on the issue and it seems like HDMI cables are a known EMI offenders' category.

I have also looked at the PCB remedies and I have found none: it does not look as if anyone uses any CM chokes such as they use for USB and such on HDMI lines. All I see is ESD protection which I have.



So, what I am looking for is:



1. A cable (6' is ok) reommendation by name: a know good EMI performer.

2. Any known working solutions that can be put on PCB to attenuate any intererence that would come out of HDMI cable.



Any help is greatly appreciated.



Thanks



Mike

Sourav Gupta's picture

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Joined: Feb 12, 2018

Replies: 696

Yes that is problem with poor hdmi cable because they don't have proper EMI shielding.

You can check EMI cable with proper shielding along with EMI ferrite.

jaksonlee's picture

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Joined: Nov 07, 2019

Replies: 124

It seems as my device is currently failing Radiated EMI certs when the HDMI cable is plugged in. Even Ferrites don't help much, according to the tech who tested it.

We have supplied thecable and it is your standard inexpensive 6' cable

I've done some reading on the issue and it seems like HDMI cables are a known EMI offenders' category.

I have also looked at the PCB remedies and I have found none: it does not look as if anyone uses any CM chokes such as they use for USB and such on HDMI lines. All I see is ESD protection which I have.

So, what I am looking for is:

1. A cable reommendation by name: a know good EMI performer.

2. Any known working solutions that can be put on PCB to attenuate any intererence that would come out of HDMI cable.