[Hackrf-dev] Auto-calibration in receiving mode

[Brian Gieryk]

Never having used hackrf_sweep, this may be a stupid question.

Is there a peak find/hold function?

That may, if the span is narrow enough to eliminate strong signals of no interest, be what is sought after.

Then, perhaps, one could write a simple block, that tied into the peak find, that would set the RBW to an appropriate value dependent on frequency?

Brian
KE6IYC


On Apr 24, 2018, at 08:37 AM, Dominic Spill <dominicgs at gmail.com> wrote:

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

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-- 
Matteo TERZI
Google Gmail Member

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