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From: | Marcus D. Leech |
Subject: | Re: [Discuss-gnuradio] Signal drought |
Date: | Mon, 05 May 2014 20:44:26 -0400 |
User-agent: | Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.24) Gecko/20111108 Fedora/3.1.16-1.fc14 Thunderbird/3.1.16 |
The default antenna port if you don't specify one is always TX/RX -- because you might be wanting to do half-duplex. You can explicitly specify the RX2 antenna port in the GRC source block, or just remember that "unspecified" means, typically, TX/RX.I changed antenna’s and I see a signal now in uhd_fft. I just noticed that when in GRC and I run the flow graph, i don’t see the RX light come on the board like when running uhd_fft. I have put the grc file up here http://test.utr-software.com/sdr/test.grc Thanks, Greg
On May 5, 2014, at 5:03 PM, Greg Hulands<address@hidden> wrote:It just looks like noise. On May 5, 2014, at 4:59 PM, Marcus D. Leech<address@hidden> wrote:On 05/05/2014 07:52 PM, Greg Hulands wrote:Hi, I built all the code today using the build-gnuradio script and when I create a simple GRC flow graph going from the USRP source to the waterfall plot, I get no data coming in. I then built gqrx and ran it and it too doesn’t get any data in from the device to display on its waterfall. I ran the rx_samples_to_file example and captured some data, but when looking at it in a hex editor, it doesn’t look like it captured anything in particular (http://test.utr-software.com/sdr/rxdump.dat). I ran it with ./rx_samples_to_file —freq=107700000 —rate=1000000 —file=~/rxdump.dat. I am new to gnu radio and sdr so I’m not yet sure how to dig in to debug these issues. Anything help is greatly appreciated. Thanks, GregHow about something really, really simple: uhd_fft -a type=b200 -f 107.7e6 -s 1.0e6 -g 40 --fft-rate 8 --averaging -- Marcus Leech Principal Investigator Shirleys Bay Radio Astronomy Consortium http://www.sbrac.org _______________________________________________ Discuss-gnuradio mailing list address@hidden https://lists.gnu.org/mailman/listinfo/discuss-gnuradio_______________________________________________ Discuss-gnuradio mailing list address@hidden https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
-- Marcus Leech Principal Investigator Shirleys Bay Radio Astronomy Consortium http://www.sbrac.org
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