[Hackrf-dev] deaf HackRF

[Stephen]

Hi,

Ive just bought a HackRF, but I have found  RF performance is poor. Compared
to a $12 USB RTL2832 SDR, it is deaf by about 32-36dB.

 

The tests were done with an HP 8922 test set & an unmodulated carrier at
137.5MHz. The test was the generated RF signal required for both devices to
achieve the same scale level in SDR#.

 

RTL SDR                  HackRF     Difference

Scale1   -127dBm              -95dBm               32dB

Scale2   -115dBm              -79dBm               36dB

Scale3  -105dBm               -69dBm                36dB

 

 

The tests were done with max gain on both devices, but with the HackRF AMP
off.

 

I have seen from posts that others have had this problem - related soldering
of RF switches in the manufacturing process.

Can anyone provide further details on the fix  or suggest a resolution
please?

 

 

Thanks,

 

Stephen

 

 

 

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