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[Discuss-gnuradio] USRP source gain vs osmocom source gain?

From: Eamon Heaney
Subject: [Discuss-gnuradio] USRP source gain vs osmocom source gain?
Date: Tue, 11 Jun 2019 18:33:08 -0400

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.

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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