SPI0_SCK(Pin# 91) Waveform is imperfect

The picture shows the waveform of SPI0_SCK, and the usage is the SPI 0 Clock. It looks like there’s no filtering. What’s the reason for that? How can it be improved?
Thanks to anyone who would like to offer advice.

Is this on your custom carrier board, right?

Hi, how do you measure that? Is it on your own board? There is a level shift on SPI0 lines on devkit, obviously the voltage is 1.8V in your waveform which should be 3.3V on devkit.
If it is on your own board, what’s the external device to SPI0?

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