[Hackrf-dev] HackRF Hardware Issue

[Jay Bougie]

Would this issue show itself in a unit that had extremely high power spurs
along with "being deaf"  (that seems to be my current issue.)

Using SDR#, Zefie hackrf plugin, and external antenna I can't quite seem to
find any balance of hearing what I should and the the unit looking like it
gets overloaded (and floor drops). Other odd states are a breathing floor
(noise floor moving up and down) and extreme spurs  (very occasionally,
thousands). ~I am comparing what I think I should be seeing to an RTL-SDR
(around 850MHz band), or in radio band the lack of any FM radio stations is
very obvious.

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.



On Tue, Aug 27, 2013 at 2:01 AM, Michael Ossmann <mike at ossmann.com> wrote:


> John,

>

> Thanks for your help!  That sort of problem has been seen before and is

> usually due to a broken solder joint at one of the RF switches.  The fix

> is often as simple as applying liquid flux to all the switches and

> reflowing them with hot air.  I'm happy to do that if the board is sent

> back to me.

>

> Mike

>

>

> On Mon, Aug 26, 2013 at 11:57:20PM -0500, john at zaphv.com wrote:

> >

> > I am helping someone local to me trying the get their hackrf up and

> > running,  apparently they have not had much luck from the start.  I

> > set it up here with the same antenna , setup, settings and gains I use

> > with my hackrf and what I have noticed is it is working it's just

> > profoundly deaf I can just see signals which are normally blowing the

> > doors off.  I confirmed the antenna mod was done with a multi meter

> > and it seems to be ok.  I just wanted to see if this issue was ever

> > seen in production and mabye a possible cause before I jump in to it.

> >

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