Re: [Discuss-gnuradio] usrp_* gains on Mac OS X much greater than on Linux

[Lamar Owen]

On Wednesday 21 December 2005 21:46, Matt Ettus wrote:
> Jonathan Jacky wrote:
> > I've observed something weird running some USRP programs on Mac OS X:
> > the gains in effect in usrp_siggen, usrp_oscope and usrp_fft seem
> > unreasonably large.  I only get reasonable looking output (from
> > usrp_siggen) and input (with usrp_oscope and usrp_fft) with -a100 or
> > less, otherwise the output (or input) saturates or wraps around in a
> > very bizarre way.

> I think you are running into endianness issues here.  That would give
> you an apparent gain of 256.

I would tend to agree; PowerPC is big endian, IIRC.  So endian-agnostic 
routines need to be used at the USRP level as well, it seems. 
-- 
Lamar Owen
Director of Information Technology
Pisgah Astronomical Research Institute
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