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yellowline
Currently I am doing CE mark certification of one product which will be industrial used.
It has several interfaces which include four USB, and two eSATA. In the certification, the four USB connect to Keyboard, mouse and two flash drives. The two eSATA connect to eSATA drive.
When doing conducted immunity (4-6) test with USB flash drive interface (I believe using direct injection), everything is fine. But when doing test with eSATA drive interface (also direct injection), it has both two flash drives fail and cannot recover by themselves. These two USB interfaces with flash drives are the closest interfaces to eSATA interface.
I am just wondering that when doing test with USB flash drive interface, it should have the biggest disturbance to the flash drive. But the test shows everything is fine. But when doing test with eSATA drive interface, it has both two flash drives fail. Is this phenomenon weird?
Any advice is welcome.
It has several interfaces which include four USB, and two eSATA. In the certification, the four USB connect to Keyboard, mouse and two flash drives. The two eSATA connect to eSATA drive.
When doing conducted immunity (4-6) test with USB flash drive interface (I believe using direct injection), everything is fine. But when doing test with eSATA drive interface (also direct injection), it has both two flash drives fail and cannot recover by themselves. These two USB interfaces with flash drives are the closest interfaces to eSATA interface.
I am just wondering that when doing test with USB flash drive interface, it should have the biggest disturbance to the flash drive. But the test shows everything is fine. But when doing test with eSATA drive interface, it has both two flash drives fail. Is this phenomenon weird?
Any advice is welcome.
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