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Dangerous Prototypes

Dangerous Prototypes => Bus Pirate Development => Topic started by: laghitite on February 22, 2015, 06:17:37 pm

Title: "Weird" oscillation using the logic analyzer
Post by: laghitite on February 22, 2015, 06:17:37 pm
Hi everyone,

I have bus pirate v3a which runs firmware 5.10 and bootloader 4.4.
I have a problem with logic analyzer mode : I see oscillations where there should not be. I took a screenshot of what I get when having CS (ch0) to ground and MISO (ch1) to VCC (3.3v) : the oscillations are seen on ch0 whereas it is set to ground.
Is there any explanation to that ?

Thanks,

Alex
Title: Re: "Weird" oscillation using the logic analyzer
Post by: Sjaak on February 23, 2015, 12:56:02 pm
I suspect you pick up a 50Hz main signal :) Does the ground connection have a big loop? try a jumper instead.
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