SOLVED: Hikvision microphone static noise/humming which starts right after the boot sequence is done

Dreamliner

Young grasshopper
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May 31, 2019
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Just for info: I'm using very cheap 1$ microphone ( link to buy ) with RC-filter to reduce 12V power noise.
 

maximosm

Young grasshopper
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Jan 8, 2015
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Hi.I testing some microphones at 2 cameras working great and at the third camera have a tik tik sound. The conection is the same with the other cameras connected with POE . Is this an electric noise?

 
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