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TUSB1046A-DCI: Compliance Test Fail

Part Number: TUSB1046A-DCI

We made compliance tests of the USB-C port and failed at the TX "LFPS Min Amplitude" measurement. The problem seams to be the first data packet. 

Any idea where this could come from? It is the same in normal and flipped direction. In normal operation the USB-C port works without any problem, just the compliance test fails.