SPI Signal Shape Issue

[AE104]

Hello,

I am try to control an external DAC system with the SPI interface. The clock signal shape looks like the attached file. I didn't figure out the meaning of the signal. Yellow is the clock signal and the blue is CS signal.

[AE104]

..

[AScha.3]

better.

probe still at x1 ! you cannot test cmos connections at > 10MHz with x1 probe setting.

set x10 at probe switch and in scope menu.

[AE104]

I set the 10x both the probe and settings in the oscilloscope.

[AScha.3]

x10 probe setting needs adjustment - did you adjust ?

+ BW limit 20 M is set.

do you make some game here ? who is the biggest idiot ? or what ?

sorry.

want help - or play game ?

[AE104]

No game. What adjustment do I need?

[AScha.3]

bw limit off.

and adjust probes - i hope you know how to do.

[AE104]

Yes I did it.

[AE104]

This is the latest measurement that I have.

[AScha.3]

again sample rate much too low. 500 ks - how you do this ?

+

or do you make "SINGLE" shot and then turn around the timing? this could make such pictures.

show a measurement without any change or "adjustment" after the single shot.

[AE104]

Sorry for late reply. Honestly, I don't know, for example now the sampling rate of the oscilloscope is 1 GSa/s.

You're right. I captured only this zoom in figure. Before zoomed in, it was square wave.

[AScha.3]

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