[Hackrf-dev] Sensitivity

[Chris Hinkey]

If I understand it correctly Both the RTL and the HackRF give you 8bit I/Q
samples.  But the SNR is based on more then just this, gain settings of
both platforms come into play.  the RF gain stage of the HackRF is quite
noisy.

I think the HackRF preforms better at certain sample rates 16MS/s for
instance.  Someone with more knowledge may be able to elaborate further on
this.

-Chris

On Wed, Apr 1, 2015 at 2:32 PM, Paul Connolly <eeipcy at gmail.com> wrote:

>  The sample rate of a RTL dongle is 28.8MSPS at an unknown number of bits,
> this is decimated inside the RTL2838 chip down to 2.4MSPS. That is the
> maximum data rate that can be transferred out  in debug mode without
> dropping samples. So to compare the two of them you would need to decimate
> the 20MSPS of the HackRF down to 1.66MSPS. Then you could compare the two
> devices. The more bandwidth the more noise, so the RTL may actually look
> worse in the comparison, I've never actually done the comparison. It is
> like trying to compare a banana to a unicycle - they can both make you
> fall, but they are not the same.
>
> On 01/04/2015 11:45, Tom N wrote:
>
> Am I correct in saying that a rtl dongle is more sensitive then the hackrf?
> I have done many tests with different software, sdr#, gqrx, sdr console and have tried every different gain setting, samplerates, bands, but my conclusion is that the SNR is better on the dongle.
>
>
>
> _______________________________________________
> HackRF-dev mailing list
> HackRF-dev at greatscottgadgets.com
> https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://pairlist9.pair.net/pipermail/hackrf-dev/attachments/20150401/aa2f4151/attachment.html>