Have you updated both the 'SPI Flash' and 'CPLD' firmware and rebooted the hackrf in between? Instructions below:
https://github.com/mossmann/hackrf/wiki/Updating-Firmware Mike -- Mike Jameson M0MIK BSc MIET Email: [email protected] Web: http://scanoo.com On Mon, Sep 22, 2014 at 4:00 PM, Mehdi Asgari <[email protected]> wrote: > 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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