Re: [Discuss-gnuradio] TVRX2 and GRC
On 10/03/2014 11:23 PM, Daniel Marlow wrote: As the second attached screen shot shows, however, the system does not run properly, producing a string of D's, with the FFT window going dark. The warning that reads Sensor 'lo_locked' failed to lock within timeout on channel 0 seems like it might be related. On top of what Jeff + Marcus have said, that warning was a result of an over-zealous checking, which is removed in the latest version. Cheers, M ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] TVRX2 and GRC
On Oct 4, 2014, at 6:39 PM, Marcus D. Leech wrote: On Oct 3, 2014, at 7:30 PM, Marcus D. Leech wrote: If you put your flow-graph itself (.grc file) somewhere, or attach it, we can take a better look. What kind of comptuer? (OS, CPU/MEM specifics, etc). -- Marcus Leech Principal Investigator Shirleys Bay Radio Astronomy Consortium http://www.sbrac.org Hi Marcus, Thanks. The .grc file is attached. Other details: o Intel(R) Core(TM)2 Duo CPU E8400 @ 3.00GHz o Memory 3GB o OS 14.1 Ubuntu Cheers, Dan I've attached updates to your graph that should make it behave more rationally: 2Msps sample rate -- consistent with your programmed 1.7MHz analog bandwidth Deleted antenna spec in source block--it contained invalid specification Made the device address spec valid Moved things into user-changable variables: freq and gain Made both source and FFT use the samp_rate variable, so changing that variable will change both source and FFT sink Made FFT sink turn on averaging, and use freq variable to set center frequency I'd suggest looking it over carefully, and comparing against what you originally had. -- Marcus Leech Principal Investigator Shirleys Bay Radio Astronomy Consortium http://www.sbrac.org TVRX2.grc Hi Marcus, Many thanks. We will give that a try. Cheers, Dan ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] TVRX2 and GRC
On Oct 3, 2014, at 7:30 PM, Marcus D. Leech wrote: If you put your flow-graph itself (.grc file) somewhere, or attach it, we can take a better look. What kind of comptuer? (OS, CPU/MEM specifics, etc). -- Marcus Leech Principal Investigator Shirleys Bay Radio Astronomy Consortium http://www.sbrac.org Hi Marcus, Thanks. The .grc file is attached. Other details: o Intel(R) Core(TM)2 Duo CPU E8400 @ 3.00GHz o Memory 3GB o OS 14.1 UbuntuCheers,Dan TVRX2.grc Description: Binary data ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] TVRX2 and GRC
On Oct 3, 2014, at 7:49 PM, Jeff Long wrote: Dan, If you execute the various sudo sysctl ... lines shown in the warnings, does it work any better? You can make these permanent. man sysctl.conf - Jeff Hi Jeff, Thanks for the suggestion.We will give that a try. Cheers, Dan ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] TVRX2 and GRC
On Oct 3, 2014, at 7:30 PM, Marcus D. Leech wrote: If you put your flow-graph itself (.grc file) somewhere, or attach it, we can take a better look. What kind of comptuer? (OS, CPU/MEM specifics, etc). -- Marcus Leech Principal Investigator Shirleys Bay Radio Astronomy Consortium http://www.sbrac.org Hi Marcus, Thanks. The .grc file is attached. Other details: o Intel(R) Core(TM)2 Duo CPU E8400 @ 3.00GHz o Memory 3GB o OS 14.1 Ubuntu Cheers, Dan Well, for one, your FFT block disagrees rather dramatically with your UHD source block about the same rate, which you've selected as 10Msps. I'd go for 6.25Msps, and make certain that your source block and FFT block agree on sample rate. And if you're really wanting the 1.7MHz that you've programmed in the source to 1.7MHz, you don't need more than about 2Msps sampling rate. Very few daughtercards have variable analog bandwidth, the TVRX2, DBSRX2, and perhaps XCVR are the only ones with variable analog baseband/IF bandwidth. -- Marcus Leech Principal Investigator Shirleys Bay Radio Astronomy Consortium http://www.sbrac.org ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] TVRX2 and GRC
On Oct 3, 2014, at 7:30 PM, Marcus D. Leech wrote: If you put your flow-graph itself (.grc file) somewhere, or attach it, we can take a better look. What kind of comptuer? (OS, CPU/MEM specifics, etc). -- Marcus Leech Principal Investigator Shirleys Bay Radio Astronomy Consortium http://www.sbrac.org Hi Marcus, Thanks. The .grc file is attached. Other details: o Intel(R) Core(TM)2 Duo CPU E8400 @ 3.00GHz o Memory 3GB o OS 14.1 Ubuntu Cheers, Dan I've attached updates to your graph that should make it behave more rationally: 2Msps sample rate -- consistent with your programmed 1.7MHz analog bandwidth Deleted antenna spec in source block--it contained invalid specification Made the device address spec valid Moved things into user-changable variables: freq and gain Made both source and FFT use the samp_rate variable, so changing that variable will change both source and FFT sink Made FFT sink turn on averaging, and use freq variable to set center frequency I'd suggest looking it over carefully, and comparing against what you originally had. -- Marcus Leech Principal Investigator Shirleys Bay Radio Astronomy Consortium http://www.sbrac.org TVRX2.grc Description: application/gnuradio-grc ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] TVRX2 and GRC
Dan, If you execute the various sudo sysctl ... lines shown in the warnings, does it work any better? You can make these permanent. man sysctl.conf - Jeff On 10/03/2014 05:23 PM, Daniel Marlow wrote: Hello, We have a new TVRX2, which we are using with a N200 USRP. The N200 has a GPSDO. The system seems to work fine when we test it with uhd_fft. However, we are having trouble figuring out the correct configuration settings in for a custom GRC flow graph.The graph in question is simple, consisting of just the USRP and an FFT GUI, as shown in the first attached screen shot. As the second attached screen shot shows, however, the system does not run properly, producing a string of D's, with the FFT window going dark. The warning that reads Sensor 'lo_locked' failed to lock within timeout on channel 0 seems like it might be related. The 3rd and 4th screen shots show the setup menus for the USRP and the FFT GUI. Any advice on what might be going wrong would be greatly appreciated. Sincerely, Dan Marlow ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
