[Hackrf-dev] Sensitivity

[Tom]

Hi Rich,

 

Only issue I have with your test method is that the gain settings should
have been adjusted for max SNR, I notice you have the gain settings set the
same for both devices in your test.

 

For example using a similar flow graph for the RTL dongle with the default
settings of rf=10,if=20,bb=20 I get a signal of -50db with noise -75db, if I
increase the rf from 10 the point before it overloads which for me at that
particular frequency is rf=35 then the signal is at -25db noise at -65db,
that's a 25db increase in signal and 10db increase in noise.

 

 

 

From: HackRF-dev [mailto:hackrf-dev-bounces at greatscottgadgets.com] On Behalf
Of Rich S
Sent: Monday, 13 July 2015 8:15 PM
To: hackrf-dev at greatscottgadgets.com
Subject: Re: [Hackrf-dev] Sensitivity

 

I did this comparison a bit ago using GNURadio because I could make all the
settings identical without having to worry about how SDR# was programmed.
Typically, you would not want to run the HackRF at 2 MSPS, but to keep the
comparison accurate, I did.

>From my dropbox:  

https://www.dropbox.com/s/v18qzlpojpnybjj/RT820vsHackRF.pdf?dl=0

On 7/13/2015 12:11 AM, Tom wrote:

Sorry to re hash and old topic but can I ask if any member can do a
screenshot like the one I have linked in below comparing an RTL dongle and
the HackRF using SDR#, I'm about -10db worse on the HackRF without using the
amp.  Just want to make sure this is normal behaviour or a fault.

 

Thanks

 

 

https://mega.co.nz/#!MwUxVIZS!JWhfoou7LcwI6HeHVU5jxsfsamFpADulwez6Wz6oNEk
<https://mega.co.nz/#%21MwUxVIZS%21JWhfoou7LcwI6HeHVU5jxsfsamFpADulwez6Wz6oN
Ek> 

 






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