March 2015 - osmocom-sdr - lists.osmocom.org

BW setting for R802T tunner
by Jiří Pinkava 29 May '15

29 May '15

Hi, this series of patches add BW setting support for R820T and interface to set BW explicitly. This work is partialy based on some patches flying around namely Alexander Kurpiers. Testing have been done for some dongles at it looks good except for rally narrow BW setting. No testing of BW setting have been performed for other RF frontends i have only R820T now. JP

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HackRF powered antenna support (pleeeeease :)
by Brad Hein 15 May '15

15 May '15

I would like to humbly request support for hackrf antenna power in gr-osmosdr. At runtime preferably, or at least an init string flag to control it (hackrf=0,antenna_power=1 for example). The function call seems to be hackrf_set_antenna_enable() but it's not exposed in gr-osmosdr as far as I can tell. I have some dev experience (but not in C) but I'm falling short trying to understand the code and add the feature myself. If someone wants to provide some "ELI5" guidance I'll be happy to give it another go. Having this feature would open up the powered antenna feature to users of gr-osmosdr such as gnuradio, gqrx, and the list goes on (big win!) Reference: https://www.mail-archive.com/hackrf-dev@greatscottgadgets.com/msg00423.html Thanks! Brad

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compiling rtl-sdr on windows using cygwin
by Simon Eigeldinger 14 Apr '15

14 Apr '15

Hi all, anyone could tell me how to compile rtl-sdr on windows using cygwin? i have all libs but i seem not to get any dlls and programs back. used the normal cmake and the method using a configure script. greetings, simon --- Diese E-Mail wurde von Avast Antivirus-Software auf Viren geprüft. http://www.avast.com

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librtlsdr feature patch: Added a CMake option to specify the udev rules destination directory (handy for maintainers)
by Marcus Müller 21 Mar '15

21 Mar '15

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R820T upper frequency ?
by friedtj 17 Mar '15

17 Mar '15

I am struggling with using some of the R820T-based dongles I bought (http://www.dx.com/p/170541) I am wondering where the specs from http://sdr.osmocom.org/trac/wiki/rtl-sdr comes from: although I am told that the operating frequency range is 24 - 1766 MHz, I am struggling to lock at 1574.2 MHz. From the datasheet (http://superkuh.com/gnuradio/R820T_datasheet-Non_R-20111130_unlocked.pdf) we are already well above the "official" operating frequency of this receiver frontend, but I nevertheless attempted to reproduce with this dongle the GPS decoding scheme I successfully implemented with E4k based dongles (for teaching purposes, I'd need a reliable supply of dongles but I only have a couple of E4k based dongles left, one of them probably damaged since the frontend is overheating). I did try to replace L9 (RF input), L2 + L6 (RF filters) and most significantly the pump charge RC circuit R8/C16 from the datasheet with high quality RF-grade components, but only managed to extend by ~60 MHz the locking range of the PLL, from 1.500 to 1.560 GHz. I am unable to to gain the last 20 MHz of reliable locking to receive GPS ! The way I measure is trivial: a frequency synthesizer generates a single tone (-35 dBm) and I look at the gnuradio FFT output. After a couple of seconds, the PLL unlocks and the visible single tone vanishes from the FFT. At 1.5 GHz the measurement is unreliable, lasts for about 1-10 seconds at 1.55 GHz, and a second at most at 1.56 GHz. The dongles never lock at 1.57 GHz, let alone 1.5742 GHz. I attempted the experiment with 3 dongles (of the 12 I have) so something is definitely wrong with either the layout of the PCB, or the information on the web page. Thanks for any info or which component to upgrade to extend the operating range (by only another 30 MHz !), JM -- JM Friedt, FEMTO-ST Time & Frequency/SENSeOR, 32 av. observatoire, 25044 Besancon, France

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anyone have make fail on build.make:54: recipe for target 'src/CMakeFiles/rtl_tcp.dir/rtl_tcp.c.o'??
by loren butler 16 Mar '15

16 Mar '15

make produces the following...i have tried the main and mirror to see if there was a difference.... running raspian, the same instructions worked before...however im stuck in my tracks with this one Scanning dependencies of target convenience_static [ 5%] Building C object src/CMakeFiles/convenience_static.dir/convenience/convenience.c.o Linking C static library libconvenience_static.a [ 5%] Built target convenience_static Scanning dependencies of target rtlsdr_shared [ 10%] Building C object src/CMakeFiles/rtlsdr_shared.dir/librtlsdr.c.o [ 15%] Building C object src/CMakeFiles/rtlsdr_shared.dir/tuner_e4k.c.o [ 20%] Building C object src/CMakeFiles/rtlsdr_shared.dir/tuner_fc0012.c.o [ 25%] Building C object src/CMakeFiles/rtlsdr_shared.dir/tuner_fc0013.c.o [ 30%] Building C object src/CMakeFiles/rtlsdr_shared.dir/tuner_fc2580.c.o [ 35%] Building C object src/CMakeFiles/rtlsdr_shared.dir/tuner_r82xx.c.o Linking C shared library librtlsdr.so [ 35%] Built target rtlsdr_shared Scanning dependencies of target rtl_adsb [ 40%] Building C object src/CMakeFiles/rtl_adsb.dir/rtl_adsb.c.o Linking C executable rtl_adsb [ 40%] Built target rtl_adsb Scanning dependencies of target rtl_eeprom [ 45%] Building C object src/CMakeFiles/rtl_eeprom.dir/rtl_eeprom.c.o Linking C executable rtl_eeprom [ 45%] Built target rtl_eeprom Scanning dependencies of target rtl_fm [ 50%] Building C object src/CMakeFiles/rtl_fm.dir/rtl_fm.c.o Linking C executable rtl_fm [ 50%] Built target rtl_fm Scanning dependencies of target rtl_power [ 55%] Building C object src/CMakeFiles/rtl_power.dir/rtl_power.c.o Linking C executable rtl_power [ 55%] Built target rtl_power Scanning dependencies of target rtl_sdr [ 60%] Building C object src/CMakeFiles/rtl_sdr.dir/rtl_sdr.c.o Linking C executable rtl_sdr [ 60%] Built target rtl_sdr Scanning dependencies of target rtl_tcp [ 65%] Building C object src/CMakeFiles/rtl_tcp.dir/rtl_tcp.c.o /home/davinci/librtlsdr/src/rtl_tcp.c:28:23: fatal error: arpa/inet.h: No such file or directory compilation terminated. src/CMakeFiles/rtl_tcp.dir/build.make:54: recipe for target 'src/CMakeFiles/rtl_tcp.dir/rtl_tcp.c.o' failed make[2]: *** [src/CMakeFiles/rtl_tcp.dir/rtl_tcp.c.o] Error 1 CMakeFiles/Makefile2:355: recipe for target 'src/CMakeFiles/rtl_tcp.dir/all' failed make[1]: *** [src/CMakeFiles/rtl_tcp.dir/all] Error 2 Makefile:113: recipe for target 'all' failed make: *** [all] Error 2

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rtl_test.exe failed to open rtlsdr device #0 with RTL2832U+R820T(tuner)
by Longxiang Wang 13 Mar '15

13 Mar '15

Hi, I am a rookie playing with SDR, and I have installed the driver with zadig properly I think, then I try to use rtl_test.exe, the error is like *Found 2 devices:* *0: ezcap usb2.0 DVB-T/DAB/FM dongle* *1:ezcap usb2.0 DVB-T/DAB/FM dongle* *failed to open rtlsdr device #0* Can anyone help? I would really appreciate that Thanks, Benjamin

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SDR Osmocom
by Radiarisainana Sitraka 11 Mar '15

11 Mar '15

I would have a principal electornic schematic of SDR?thank's for helping.

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Integration of Murata DNT 900
by Al Woodcock 10 Mar '15

10 Mar '15

Has any one used the Murata DNT 900 with a raspberry pi To receive data from the iron ert? It seems to have a little more range than the others I've been looking into. Just curious Al

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Integration of Murata
by Al Woodcock 10 Mar '15

10 Mar '15

Sent from my iPad

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