[Hackrf-dev] Did i kill RF frontend amplifier ?

[Graham Cottew]

I also have the same problem on both Tx and Rx; selecting the RF amp attenuates the signal both receive and transmit.
I also notice that selecting RF amp on also appears to shift some of spurious? signals down in frequency by some kHz on a FFT  display when using
osmocom_fft -a hackrf -v

Cheers,
Graham Cottew
Technology Director
Zendata Pty Ltd
+61417722400




On 23 Dec 2014, at 1:23 am, Rémi Laisné <remi.laisne at gmail.com> wrote:

> Hi,
> I replaced the two U13, like Paul suggested, but it didn't solve my problem.
> Signal still show weaker when switching RF gain from 0 to 14 db.
> 
> Do you have another idea of what could have been broken ? 
> 
> 
> 2014-12-05 13:04 GMT+01:00 Rémi Laisné <remi.laisne at gmail.com>:
> Ok thanks for your answer.
> I followed this tutorial :
> 
> http://goughlui.com/2013/11/10/rtl-sdr-a-tool-for-visualizing-broadcast-satellite-signals/
> 
> As showed, the author plugged the lnb out directly to rtl sdr without attenuator. (?) Plus, he got strong signals, I couldn't get such strong signals with hackrf.  (When rf front-end amp worked)
> 
> 
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