Thank you Mike. I tried the above items, but there's no significant change in result. I can clearly hear the radio, but it still comes with noise (In fact I've played with every config that I thought is related, but I can't reach the same quality level that I am receiving via RTL-SDR)
On Mon, Sep 22, 2014 at 6:04 PM, Mike Jameson <[email protected]> wrote: > Some things to try: > > 1) Make your antenna as small as possible as you may be overloading it. > Broadcast FM stations are strong! > 2) Reduce the gain on all three gqrx gain controls (RF,IF & BB). Try just > raising IF until the signal appears. > 3) Set the center frequency to something slightly above or below the > target frequency and click on the wanted frequency. > 4) Set the sampling rate to 10e6 (10M) > 5) Start GQRX using a fresh config with 'gqrx -r' > > Mike > > -- > Mike Jameson M0MIK BSc MIET > Email: [email protected] > Web: http://scanoo.com > > On Mon, Sep 22, 2014 at 3:18 PM, Mehdi Asgari <[email protected]> > wrote: > >> 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 <[email protected]> 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 >>>> [email protected] >>>> https://pairlist9.pair.net/mailman/listinfo/hackrf-dev >>>> >>>> >>> _______________________________________________ >>> HackRF-dev mailing list >>> [email protected] >>> https://pairlist9.pair.net/mailman/listinfo/hackrf-dev >>> >> >> >> _______________________________________________ >> HackRF-dev mailing list >> [email protected] >> https://pairlist9.pair.net/mailman/listinfo/hackrf-dev >> >> >
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