[Hackrf-dev] HackRF Hardware Issue

[Jay Bougie]

Yes, trace was cut and tested. I occasionally have seen some FM radio in
the past, but never as clear and pronounced and consistent as would be
desirable.  To be honest it isn't the lack of RF the is as concerning to me
as the high power spurs or emitters. (Not counting the "artificial DC
component one") I haven't gone as far as to terminate the antenna and check
(just to rule out local interference), perhaps that should be a next step.I
have tried to eliminate the obvious/possible co-located interference  items
such as onboard wireless N/G, bluetooth, no wireless routers nearby, no
wireless mouse, no cellphones nearby, no cellphone tower within 1/2 mile or
so.

Perhaps I can try to post some examples of what I'm seeing in next few days.


On Wed, Aug 28, 2013 at 9:40 AM, dragorn <dragorn at kismetwireless.net> wrote:


> On Tue, Aug 27, 2013 at 10:19:57PM -0400, Jay Bougie wrote:

> > I wondered if the somehow the HackRF needs more RF conditioning than the

> > RTL-SDR. Perhaps highpower emitters outside the range I am tuned to are

> > causing the spurs  and raised noise floor (built in AGC response)?

> > Highpass/Lowpass/bandpass recommended? Perhaps someone knows a technical

> > reason this could or could not be a factor.

>

> With my unit I can, for example, pick up FM stations with no problem

> (around 100MHz) with no gain enabled and no special treatment.  I'd

> say that's a pretty good baseline - if FM radio isn't blatantly

> powerful, you have a problem.

>

> * This is using an external antenna.  Did you cut the trace?  Have you

> tested it w/ a multimeter to confirm it's fully cut?

>

> -m

>

> --

>

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