[Hackrf-dev] HackRF hardware problems

[Stefan Wagener]

Thanks Doug for your opinion.

Now, it would be nice to get a better understanding of your environment and
the setup you are using. Labelling the unit as an "expensive joke" is
certainly your personal opinion and not shared by me. I do not see these
spikes and have very good sensitivity in comparison to a FCD+, RTL-Dongle
and conventional radio (IC-9100), however my setup and environment is
probably totally different. If there are problems with the unit, and I say
again "If" ,we need to find out if it is a quality control problem, a
design problem, a user problem etc. Defining a standard set of tests with
similar or equal additional hardware (e.g. antenna) etc would go a long way
of helping everyone.

My 2 cents,

Stefan, VE4NSA

On Wed, Nov 26, 2014 at 10:46 AM, McDonald, J Douglas <jdmcdona at illinois.edu
> wrote:

>
>
> Several people have complained with HackRF problems, worrying if their
>
> unit is defective.
>
>
>
> I have the same worries. Mine clearly is nowhere near as good as
>
> the DVB dongles.  But it clearly works, no quibble. It works both in
>
> SDR#/Windows and Gnuradio/GRC/Ubuntu.
>
>
>
> But it is plagued by spurious spikes of near-CW stuff everywhere, even
>
> up in the upper GHz areas where there should be essentially nothing.
>
> It sees Wi-Fi fine ... but covered by these spurious carriers. And
>
> many of them are DIFFERENT in SDR# and Gnuradio. And using both
>
> they are dependant, both in amplitude and frequency, on the
>
> gain settings at the low gain end as well as the high gain end.
>
> That dependance at the low gain end implies to me that its is
>
> incorrectly dithered or some software problem.
>
>
>
> I bought it for the wide bandwidth for certain special purposes
>
> and it serves those purposes OK even in the presence of the garbage.
>
> But for general use, its a plain, and expensive, joke.
>
>
>
> Doug McDonald
>
>
>
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>
>
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