On Mon, Mar 7, 2011 at 3:29 AM, Werner Almesberger <[email protected]> wrote: > 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.
If this: http://micro.arocholl.com/index.php?option=com_content&view=article&id=48:introducing-rf-explorer&catid=40:article&Itemid=61 was available in appropriate frequencies, would it be useful? -- Regards, Richard Sharpe _______________________________________________ Qi Hardware Discussion List Mail to list (members only): [email protected] Subscribe or Unsubscribe: http://lists.en.qi-hardware.com/mailman/listinfo/discussion
