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Re: [Discuss-gnuradio] USRP source gain vs osmocom source gain?
From: |
Cinaed Simson |
Subject: |
Re: [Discuss-gnuradio] USRP source gain vs osmocom source gain? |
Date: |
Tue, 11 Jun 2019 16:37:47 -0700 |
User-agent: |
Mozilla/5.0 (X11; Linux i686; rv:60.0) Gecko/20100101 Thunderbird/60.7.0 |
On 6/11/19 3:33 PM, Eamon Heaney wrote:
> Hey all,
>
> I'm trying to turn the wifi receiver flowgraph in this repo
> (https://github.com/bastibl/gr-ieee802-11/blob/maint-3.8/examples/wifi_rx.grc)
> into one that will work with the HackRF.
>
> The example uses a USRP source, with a normalized gain of .75. I'm not
> sure how to translate that into parameters for the osmocom source, which
> has 3 gain options: RF gain, IF gain, and BB gain, all in dB.
RF gain=0, IF gain=32, and BB gain=32. These are general purpose
settings, i.e., don't use the RF gain unless you absolutely have to -
and you're certain there isn't a strong radio source nearby.
Type
hackrf_transfer --help
for the gain ranges and the step sizes.
-- Cinaed
>
> I tried setting the RF gain = 20log(.75) = -2.49877, but that just
> resulted in mangled packets.
>
> Any suggestions?
>
> --
> Eamon Heaney
> /
> /Fleet Commander/
> //
> /President, Model UN at Virginia Tech/
> /
>
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