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SN65DSI84: Question for SN65DSI84 LVDS waveform issue

Part Number: SN65DSI84

Hi Team,

Our customer is using our SN65DSI84 and is testing the output LVDS signals, but it looks below with some ringing on the rising and falling edge. Do you have any thoughts what's the problem for them, and how to optimize them? I'm thinking it could be caused by the LVDS impedance mismatching, and asking them to change the serial resistance, but still need your professional suggestions.

Thanks.