PN5190 TX shaping

[Leo_3]

Hi

I have a technology problem for your help.

I design a RFID solution with the PN5190. But when I capture the tx shaping  in the ISO14443A protocol with the Oscilloscope, there is a fluctuation on the falling transition.  I  upload the picture. Help me to analyze how it is so.

thanks a lot.

PN5190 

[jimmychan]

For your information, please read

PN5190 questions and answers - Chapter 3 How to adjust TX wave shapes.

And PN5190 Dynamic Power Control Quick Calibration and TxShaping Demo | NXP Semiconductors.

Hope this information help you.