Hi Mouse, Mouse wrote: >>> What i see are very very short (<1us) drops of the 12 down that are >>> larger than 1V. [...] >> The net5501 power input is decoupled with [...]. [...] >> So pulses like that are simply not possible, > > It occurs to me that perhaps the pulses are real and the underlying > problem is that there's a hardware fault causing the decoupling to not > work as well as it should. Anything from a broken etch run to a > pick-and-place failure causing that particular board to not have all > the decoupling it's supposed to could cause this - I'm speculating, of > course, but such failures _do_ happen.
Of course there can always be a defect, but as there are multiple caps it's not that likely.... I still believe that Attila is hunting for a nonexistent hardware issue, but if he wants to, he's welcome to get a replacement board, we do stand behind out products, now with full three years warranties. But I also know that from my own experience that if you just take a standard scope probe with the typical 10 cm ground lead, that 10 cm is very good at picking up unwanted pulses.... Best Regards, Soren Kristensen CEO & Chief Engineer Soekris Engineering, Inc. _______________________________________________ Soekris-tech mailing list [email protected] http://lists.soekris.com/mailman/listinfo/soekris-tech
