HackRF One SDR

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Andrew Thornett

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Dec 6, 2023, 7:34:02 AM12/6/23
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Hi All,
Is there any reason why 2 x HackRF One SDRs cannot be used for interferometry as they will take an external clock signal?
Andy

Marcus D. Leech

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Dec 6, 2023, 8:06:30 AM12/6/23
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On 06/12/2023 07:33, 'Andrew Thornett' via Society of Amateur Radio Astronomers wrote:
Hi All,
Is there any reason why 2 x HackRF One SDRs cannot be used for interferometry as they will take an external clock signal?
Andy
Getting useful phase-coherence in DSP radios is tricky.   The external clock is necessary, but generally insufficient.  There are
  questions such as:

   o What is the architecture of the RF PLL synthesizer
   o How are the ADCs clocked
   o Is there a mechanism to assure that all channels start streaming at exactly the same time

My guess is that this is possible, but it would require something similar to what KrakenSDR does to time-align all
  streams.


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andrew....@googlemail.com

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Dec 6, 2023, 8:38:45 AM12/6/23
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Oh I see – thanks Marcus

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