TVP5150AM1+DM642 DSP collects water ripples in camera video images

fenghg

TVP5150AM1+DM642 DSP collects water ripples in camera video images [Copy link]

Dear experts, I use TVP5150AM1+DM642 DSP to collect video images from analog cameras. Two cameras are in parallel and collected by VP0 and VP1 of DM642 DSP respectively. One camera has obvious water ripples, while the other one is normal. Has anyone encountered similar problems before? Please give me some advice, thank you!

飞扬自我

It's a wiring problem. It should be low-frequency interference. Check if the wiring is too close to the switching power supply.

fenghg

Feiyang self-published on 2018-10-22 18:03 It's a wiring problem. It should be low-frequency interference. Check if the wiring is too close to the switching power supply.

It's far away from the switching power supply. The digital signal line between TVP5150AM1 and DM642 DSP is a bit close to the 50MHz and 14.31818MHz crystal oscillators. I wonder if it will have any impact? Please give me some advice. Thank you.

Aguilera

Check EMI and find the interference source

alan000345

There is a problem in the circuit design, which should be classified as electromagnetic interference, and shielding should be added.