We're using an ADV7280-M chip to do our SD video to CSi interface and it's being run in progressive mode with the de-interlacing turned on. During some EMC testing it was noticed that there was a huge amount of noise around the centre frequency of the CSI link (214Mhz) , as shown in the image below. Ignoring the two large spikes either side, as they are from known sources. The rough shape of the noise changes if the camera is pointed at different things making me suspect it's possible the back end CSI link that's generating a lot of it. We're actually monitoring emissions from cabling attached and the signal is coming either from video lines or the power lines.
Has anyone experienced this kind of situation before? Ideally with ideas of how to help mitigate it?
If you post a EZ question in the Power Management section I am sure you will get help regarding you switch mode power supply question.
Senior Applications Engineer,
Analog Devices Inc.