Hmmm, I am using the last version of tools (and I don't know how should I change the magnitude) By the way, why the same setup in Gqrx produces different outputs for RTL-SDR and HackRF One? Here's a link to two screenshots from Gqrx window which may be helpful. HackRF: http://i60.tinypic.com/o7127d.png RTL-SDR: http://i57.tinypic.com/10r79lc.jpg
Thanks Mehdi On Mon, Sep 22, 2014 at 4:54 PM, Simon IJskes <si...@ijskes.org> wrote: > The experience sounds the same as my first attempt, under linux, with the > old osmosdr software, where the magnitude of the signal was incorrectly > assumed to be unsigned. > > After fixing this, it all sounded a whole lot better. > > Maybe this is also the case in your setup? > > Gr. Simon > > > On 22-09-14 15:08, Mehdi Asgari wrote: > >> Hi >> I am a beginner in SDRs (and DSP) >> For the first sample, I'm, trying to build a FM receiver. I've tried >> both RTL-SDR and HackRF One (with both GNU Radio and Gqrx) >> I can easily get the desired station (on 88.0 MHZ) without noise on >> RTL-SDR (using Gqrx or GRC) >> But when I use HackRF One (with Gqrx or GRC), I can get the radio, but >> it's noisy. >> Is is because HackRF's higher sensitivity or does it need more >> adjustment to work fine? >> >> Note 1: I am using GNU Radio Live DVD and HackRF One with firmware >> 2014.08.1 and RTL-SDR (RTL2832) >> Note 2: >> Link for using RTL-SDR with GRC: >> http://www.instructables.com/id/RTL-SDR-FM-radio-receiver- >> with-GNU-Radio-Companion/?ALLSTEPS >> Link for using HackRF with GRC: Mike's lesson 1 >> >> >> _______________________________________________ >> HackRF-dev mailing list >> HackRF-dev@greatscottgadgets.com >> https://pairlist9.pair.net/mailman/listinfo/hackrf-dev >> >> > _______________________________________________ > HackRF-dev mailing list > HackRF-dev@greatscottgadgets.com > https://pairlist9.pair.net/mailman/listinfo/hackrf-dev >
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