Original question:
Part Number: DS90UB948-Q1
Hi,
The RXIN0+ single end signal seems to be not stable.
The RXIN0+/ and RXIN0- differential signal waveform has an obvious ac oscillation on it.
Do the two waveforms work normally?
What is the reason for the instability?
Best regards,
Shubiao
Hello Shubiao,
This is normal because the FPD-Link channel is bidirectional and contains both low frequency back channel + high frequency forward channel signals together on the same conductor. You can see more information about the basics of the FPD-Link protocol here: 
Best Regards,
Casey
