I wrote: > Some of the spectra look a bit like porcupines, with spikes of up > to -30 dB in 0.25 MHz intervals. They may be indicative of the > build quality of the respective board, and may also indicate poor > antenna matching.
I investigated this a little further: http://projects.qi-hardware.com/index.php/p/ben-wpan/source/tree/master/usrp/sps/20110306/README http://downloads.qi-hardware.com/people/werner/wpan/20110306/ Unfortunately, I reworked atusb-20110214-4 to death (*), so I couldn't perform all the tests I had in mind, but it appears that the spikes in atusb are caused mainly by soldering problems. Temperature also has a small effect. (*) Well, almost. Signal strength dropped by 10 dB for some reason. It'll still be suitable for software development. - Werner _______________________________________________ Qi Hardware Discussion List Mail to list (members only): [email protected] Subscribe or Unsubscribe: http://lists.en.qi-hardware.com/mailman/listinfo/discussion
