[Hackrf-dev] Auto-calibration in receiving mode

[Dominic Spill]

Hi Matteo,

I think I understand what you're looking for.  You want to transmit a
signal, e.g. keyfob, and have the HackRF automatically show you the
frequency that it's transmitting on.

You could use HackRF in a spectrum analyzer mode, such as hackrf_sweep, to
see where the transmission is and then manually zoom in to it, but having
the software do that automatically is more complicated because there's no
way to know which signal you are hoping to focus on.

Does that answer your question?

Dominic

On 24 April 2018 at 03:03, Matteo Terzi <matteo.terzi97 at gmail.com> wrote:

> ​Hi Dominic,
> What I'm trying to do is:
> ​- I want to acquire a signal from a general device ( garage door opener
> remote control, rf car's key etc). So I don't know the real value of the
> signal (2Hz or 40GHz). Is the hackrf able to set itself on the right value
> of frequency and let me know the result by means of a graphic. I wanna use
> it as a sniffer/reader of frequencies.
>
> Thanks for the support
> Matteo
>
>
> 2018-04-24 0:20 GMT+02:00 Dominic Spill <dominicgs at gmail.com>:
>
>> Hi Matteo,
>>
>> I'm not sure I understand the question.  What are you trying to achieve?
>> Is there a known signal and you want to automatically find it?  Something
>> like GSM and you want to know which frequency the local towers are using?
>>
>> Or is it something else?
>>
>> Thanks,
>>   Dominic
>>
>> On 17 April 2018 at 08:03, Matteo Terzi <matteo.terzi97 at gmail.com> wrote:
>>
>>> Hi all,
>>> I'd like to know if there is a way to create a program, with GNU Radio
>>> Companion, which can acquire an unknown signal and display it on a FFT
>>> Sink, which should auto-calibrate on the right value of the signal.
>>> To explain better:
>>> I want to acquire a signal, but I don't know its value (Hz); so I need a
>>> FFT Sink that can do an auto-calibration, according to the value of the
>>> signal, to show me what the hackrf is acquiring, without having the issue
>>> to set the sample rate of the FFT Sink to an huge value to cover all the
>>> frequencies (difficult to visualize).
>>> Thanks for the support
>>>
>>> Matteo
>>> --
>>> Matteo TERZI
>>> Google Gmail Member
>>>
>>> _______________________________________________
>>> HackRF-dev mailing list
>>> HackRF-dev at greatscottgadgets.com
>>> https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
>>>
>>>
>>
>
>
> --
> Matteo TERZI
> Google Gmail Member
>
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