[Hackrf-dev] transmitting problem

[Peter Shipley]

I generated the signal with my own code & used a rtlsdr dongle to verify
transmission.  the graph images were generated with gnuplot.

I can clearly see the recorded data being transmitted with sdr# and the
device device respond ( a Insteon light switch )

when I attempt to transmit my own data the hackrf does not transmit
anything at all not even a blip. I've tried adjusting the gain( including
no gain) & carrier freq

eyeballing the sampled and generated data, they are both same

I've have manually  verified both files have the same sample rate, carrier
& deviation. Both are 8bit,  signed interpolated IQ data.

typo : the FSK2  deviation is 75000 ( 150k peak to peek ) not 15000.
On Jun 28, 2015 05:00, "Dominic Spill" <dominicgs at gmail.com> wrote:

> On 28 June 2015 at 02:43, Peter Shipley <peter.shipley at gmail.com> wrote:
> > I am trying to transmit FSK2 at 915Mhz and can't figure out what I am
> > doing wrong or what I am  missing.
> >
> > I am trying to transmit a generated FSK2 signal.
> > (Specs : freq=914973000, sample rate=2400000, FSK2 data with a
> > deviation of 15000 )
>
> How did you generate the signal?
>
> > the hackrf device does not  transmit anything at all when I send my IQ
> data
> > (I can demodulate both localy with out error )
>
> How are you testing whether or not it transmits anything?  Do you have
> a second SDR to monitor it with?
>
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