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SN75DP139 EMI issue

Allen Hsu
Prodigy 10 points
Other Parts Discussed in Thread: SN75DP139

Hi ,

My product has two HDMI, using TI solution SN75DP139 chips.

I have a problem , In 594MHz and 891MHz , it is over EMI limit value. The over comes from HDMI port.

I try to slove the problem , ex. adjust VSadj from 3.9K to 4.02Kohm and change CMC 90ohm to 120ohm.

But the results are limited，EMI still exceeds.

So , Can you recommand solution to slove the EMI issue from HDMI port ?