My one unit is definitely bad (I have two) - it's noisy, has poor
sensitivity, and when you turn on the LNA, it pretty much kills the
signal. Something is bad in the front-end. Don't know if it's a
switch, LNA, or both. Mike should be replacing defective units, but I
can't even get a response from him. It's absurd that all these
companies like Nooelec are selling the unit, and then just referring us
to Mike if there is a problem. They should be replacing defective units
and dealing with Mike. We waited nearly a year for the kickstarter with
all of the delays, and then get shipped defective units? I'm going to
have to start a campaign complaining to all of the sellers of the hackrf
and ask why they are selling defective products with no warranty.
On 11/26/2014 8:46 AM, McDonald, J Douglas 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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