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PWM Output distorted

Question asked by amikam.leor on Sep 5, 2016
Latest reply on Sep 6, 2016 by markt
Running an stm32f429-disco board.  I need to generate a clock source for another board.  The PWM parameters show my expected output of 16 mHz, 50% duty cycle.  However, when I look at the output on my scope, not exactly the best square wave.  Does this look decent enough to use as an external clock source to another device? I'm thinking it may be a setup issue with my scope/probe.  Any thoughts?

OK.  Update.  My rigol scope probes shows bandwidth as 1x of max 7MHz, so that may explain the issue.  I changed the probe to 10x ( max 150MHz bw), and now get the waveform below.  NewFile2leor.png

Not very nice looking either.  If it matters, I am interfacing to a Freescale SGTL5000 audio codec master clock input.