Lee, Did you find out what cause the noise? We have the same problem right now. Our noise is from 300M to 600M.
Regards, Shu On Wednesday, May 14, 2014 at 3:59:24 PM UTC-5, Lee Crocker wrote: > > It's not something unique to our board--a stock BBB has the same problem. > > > On Wednesday, May 14, 2014 1:41:29 PM UTC-7, Gerald wrote: >> >> Sounds like you may have grounding issues or unterminated pin . Using a >> probe should let you be able to determine which side of the chip it is. >> >> Gerald >> >> >> >> On Wed, May 14, 2014 at 3:37 PM, <l...@ansync.com> wrote: >> >>> It seems to come from right around the processor, but we couldn't >>> pinpoint it any more precisely than that, or even to one side of the board >>> or other. >>> >>> >>> On Wednesday, May 14, 2014 10:56:28 AM UTC-7, Gerald wrote: >>> >>>> In order to mitigate it you need to figure out where it is coming from. >>>> A probe test will help in that area. Have you run one? Using ferrites on >>>> all cables generally helps in these types of issues. >>>> >>>> Gerald >>>> >>>> >>>> >>>> On Wed, May 14, 2014 at 12:01 PM, <l...@ansync.com> wrote: >>>> >>>>> We have a BBB-based design currently undergoing FCC testing, and >>>>> they've found a bit of noise at 625 MHz. Has anyone else encountered >>>>> this, >>>>> or know what it might be, or how to mitigate it? >>>>> >>>>> -- >>>>> For more options, visit http://beagleboard.org/discuss >>>>> --- >>>>> You received this message because you are subscribed to the Google >>>>> Groups "BeagleBoard" group. >>>>> To unsubscribe from this group and stop receiving emails from it, send >>>>> an email to beagleboard...@googlegroups.com. >>>>> >>>>> For more options, visit https://groups.google.com/d/optout. >>>>> >>>> >>>> -- >>> For more options, visit http://beagleboard.org/discuss >>> --- >>> You received this message because you are subscribed to the Google >>> Groups "BeagleBoard" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to beagleboard...@googlegroups.com. >>> For more options, visit https://groups.google.com/d/optout. >>> >> >> -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.