# GNU Radio **URL:** https://www.ruby-forum.com/c/gnu-radio/15.md?page=62 [Latest](https://www.ruby-forum.com/latest.md) · [Categories](https://www.ruby-forum.com/categories.md) · [Tags](https://www.ruby-forum.com/tags.md) **Page:** 63 --- ## [\[GSoC\] Co-Processors Update #6](https://www.ruby-forum.com/t/gsoc-co-processors-update-6/230975)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [July 15, 2014, 8:13pm UTC](https://www.ruby-forum.com/t/gsoc-co-processors-update-6/230975 "2014-07-15T20:13:06Z")
Hello all, Logistical: GSoC students don’t forget to provide a quick update at the dev call July 17th 1700 UTC One month left until pencils down Progress: I was able to open the FFTC driver handle successfully s… --- ## [Ctest can't find gnuradio module!](https://www.ruby-forum.com/t/ctest-cant-find-gnuradio-module/230967)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 3\ **Last updated:** [July 15, 2014, 4:31pm UTC](https://www.ruby-forum.com/t/ctest-cant-find-gnuradio-module/230967 "2014-07-15T16:31:08Z")
Hi there, Could someone help me fix this issue, when I try to run my tests, the ctest returns the following: … from gnuradio import gr, gr\_unittest ImportError: No module named gnuradio … Nonetheless, when I impo… --- ## [Data diode with GNU Radio](https://www.ruby-forum.com/t/data-diode-with-gnu-radio/230968)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [July 15, 2014, 3:50pm UTC](https://www.ruby-forum.com/t/data-diode-with-gnu-radio/230968 "2014-07-15T15:50:35Z")
I’ve been impressed from the prices that some companies take for their products named “Data diode”. It seems a good project (just little out of topic) to implement in GNURadio. I’ll post some flow graphs soon. --- ## [Variable delay controlled clock](https://www.ruby-forum.com/t/variable-delay-controlled-clock/230965)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [July 15, 2014, 2:34pm UTC](https://www.ruby-forum.com/t/variable-delay-controlled-clock/230965 "2014-07-15T14:34:48Z")
Hi there, I have modified the delay block of baz to control it from a clock of seconds. But I do not know if this is the best implementation… :S Greetings. --- ## [GNU Radio Release 3.7.4 Available for Download](https://www.ruby-forum.com/t/gnu-radio-release-3-7-4-available-for-download/230959)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [July 15, 2014, 4:11am UTC](https://www.ruby-forum.com/t/gnu-radio-release-3-7-4-available-for-download/230959 "2014-07-15T04:11:21Z")
Discuss-gnuradio mailing list removed\_email\_address@domain.invalid https://lists.gnu.org/mailman/listinfo/discuss-gnuradio --- ## [Question regarding frequency offset correction](https://www.ruby-forum.com/t/question-regarding-frequency-offset-correction/230956)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 3\ **Last updated:** [July 14, 2014, 7:37pm UTC](https://www.ruby-forum.com/t/question-regarding-frequency-offset-correction/230956 "2014-07-14T19:37:36Z")
Hi all, In many applications very good synchronization of carrier and sampling frequencies is required. Available sources of signal not always have good clock reference. One of the examples is cheap RTL SDR receiver … --- ## [UDP sender/receiver what the heck am I doing wrong](https://www.ruby-forum.com/t/udp-sender-receiver-what-the-heck-am-i-doing-wrong/230954)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 6\ **Last updated:** [July 14, 2014, 6:38pm UTC](https://www.ruby-forum.com/t/udp-sender-receiver-what-the-heck-am-i-doing-wrong/230954 "2014-07-14T18:38:30Z")
Attached, you’ll find a pair of very-simple .grcs One is a UDP sender (using a pair of UDP sinks) The other is a UDP receiver (using a pair of UDP sources) The sender clearly works, as verified by ‘tcpdump’ at the rec… --- ## [Re: Squelch and the KSHT sounds](https://www.ruby-forum.com/t/re-squelch-and-the-ksht-sounds/230952)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [July 14, 2014, 4:33pm UTC](https://www.ruby-forum.com/t/re-squelch-and-the-ksht-sounds/230952 "2014-07-14T16:33:12Z")
Discuss-gnuradio mailing list removed\_email\_address@domain.invalid https://lists.gnu.org/mailman/listinfo/discuss-gnuradio --- ## [Doubt in digital modulation chain](https://www.ruby-forum.com/t/doubt-in-digital-modulation-chain/230825)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 1\ **Last updated:** [July 14, 2014, 3:07pm UTC](https://www.ruby-forum.com/t/doubt-in-digital-modulation-chain/230825 "2014-07-14T15:07:51Z")
Dear All, I am constructing the flow graph(screen capture, grc) attached. I am expecting the data at the output of packed-to-unpacked block to be the same as the data at the output of differential decoder, except for… --- ## [Viterbi.c, integer overflow at cumulative metric](https://www.ruby-forum.com/t/viterbi-c-integer-overflow-at-cumulative-metric/230946)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 2\ **Last updated:** [July 14, 2014, 3:03pm UTC](https://www.ruby-forum.com/t/viterbi-c-integer-overflow-at-cumulative-metric/230946 "2014-07-14T15:03:39Z")
Hi all, I noticed that in viterbi.c when input symbol pair quality is good, branch metrics ‘mets\[ \]’ maximum value is 512. In case of errorless input symbols, this causes cumulative metric increase by 512 for the bes… --- ## [Channel models in GNURADIO](https://www.ruby-forum.com/t/channel-models-in-gnuradio/230950)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [July 14, 2014, 2:57pm UTC](https://www.ruby-forum.com/t/channel-models-in-gnuradio/230950 "2014-07-14T14:57:06Z")
Hi all, I am using GNURADIO 3.7 and Ubuntu 13. I want to know if the channel models (Doppler shift) is the same/similar with matlab channel models (Doppler shift). Did someone compare them? I am inetersted in Dopple… --- ## [GNU Radio Record only on Sound](https://www.ruby-forum.com/t/gnu-radio-record-only-on-sound/230949)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [July 14, 2014, 2:43pm UTC](https://www.ruby-forum.com/t/gnu-radio-record-only-on-sound/230949 "2014-07-14T14:43:26Z")
I will confess to being a complete novice when it comes to GNU Radio but I’m in the process of setting up SDR input that I would like to have record wav files only when sound above a certain level is detected. Are the… --- ## [Squelch and the KSHT sounds](https://www.ruby-forum.com/t/squelch-and-the-ksht-sounds/230922)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 1\ **Last updated:** [July 14, 2014, 11:33am UTC](https://www.ruby-forum.com/t/squelch-and-the-ksht-sounds/230922 "2014-07-14T11:33:32Z")
Discuss-gnuradio mailing list removed\_email\_address@domain.invalid https://lists.gnu.org/mailman/listinfo/discuss-gnuradio --- ## [ABI-error](https://www.ruby-forum.com/t/abi-error/230926)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 1\ **Last updated:** [July 13, 2014, 12:44pm UTC](https://www.ruby-forum.com/t/abi-error/230926 "2014-07-13T12:44:35Z")
Hi all: Thank you in advance. I encouter an error: linux; GNU C++ version 4.6.3; Boost\_104800; UHD\_003.007.000-133-g6bd9fed2 GR-UHD detected ABI compatibility mismatch with UHD library. GR-UHD was build against ABI… --- ## [3.7.5git core dumps](https://www.ruby-forum.com/t/3-7-5git-core-dumps/230921)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 6\ **Last updated:** [July 12, 2014, 10:37pm UTC](https://www.ruby-forum.com/t/3-7-5git-core-dumps/230921 "2014-07-12T22:37:27Z")
Built 3.7.5git, and updated UHD to latest. Builds fine. Gnuradio from the command line runs fine. When trying to run gnuradio-companion it core dumps: ~/gnuradio$ gnuradio-companion linux; GNU C++ version 4.8.1; Boo… --- ## [Any way to sample/log the 50Mhz ISM signal in gnuradio with USRP2?](https://www.ruby-forum.com/t/any-way-to-sample-log-the-50mhz-ism-signal-in-gnuradio-with-usrp2/230916)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 3\ **Last updated:** [July 12, 2014, 10:17pm UTC](https://www.ruby-forum.com/t/any-way-to-sample-log-the-50mhz-ism-signal-in-gnuradio-with-usrp2/230916 "2014-07-12T22:17:46Z")
Hi guy, Thanks in advance. Currently I am implementing a project based on ofdm\_bentchmark example with USRP2. I remember that the sample rate of ADC of USRP 2 with RF2450 can be up to 100MS/s. That means we can use … --- ## [Problem during make process](https://www.ruby-forum.com/t/problem-during-make-process/230909)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [July 11, 2014, 8:32pm UTC](https://www.ruby-forum.com/t/problem-during-make-process/230909 "2014-07-11T20:32:10Z")
Hi to all, and thanks for reading my post. As a first i’m a beginner in GNU… , i have this problem : during make process i found this feedback : 65%\] Building CXX object gr-audio/lib/CMakeFiles/gnuradio-audio.dir/jac… --- ## [UHD not working after clean pybombs install](https://www.ruby-forum.com/t/uhd-not-working-after-clean-pybombs-install/230904)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 2\ **Last updated:** [July 11, 2014, 4:42pm UTC](https://www.ruby-forum.com/t/uhd-not-working-after-clean-pybombs-install/230904 "2014-07-11T16:42:53Z")
Hello, I did find a simlar entry to this problem on the forum from last month but there was no usable solution for me unless I missed something. Also I have not found a way to allow me to change the USB permissions… --- ## [Install a OOT module from one to another computer](https://www.ruby-forum.com/t/install-a-oot-module-from-one-to-another-computer/230899)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [July 11, 2014, 10:49am UTC](https://www.ruby-forum.com/t/install-a-oot-module-from-one-to-another-computer/230899 "2014-07-11T10:49:54Z")
Hi! I’ve already created some blocks for GRC with gr\_modtool and they work. But, when I tryed to install those on another computer, I copy the gr-\* folder after a clean and an uninstall and after I deleted the build … --- ## [How to measure ber and snr](https://www.ruby-forum.com/t/how-to-measure-ber-and-snr/230894)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 2\ **Last updated:** [July 11, 2014, 10:45am UTC](https://www.ruby-forum.com/t/how-to-measure-ber-and-snr/230894 "2014-07-11T10:45:35Z")
hi , how to measure ber and snr in gnuradio ?is there any blocks about this? thanks, bzs --- ## [Change the x-axis min and max values for QT GUI time sink block](https://www.ruby-forum.com/t/change-the-x-axis-min-and-max-values-for-qt-gui-time-sink-block/230872)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 5\ **Last updated:** [July 11, 2014, 6:39am UTC](https://www.ruby-forum.com/t/change-the-x-axis-min-and-max-values-for-qt-gui-time-sink-block/230872 "2014-07-11T06:39:39Z")
Hi all, In WX GUI time sink when we roll the mouse over the plot we can change the range of y-axis and x-axis but in QT GUI time sink it is not changing in this way.We can set the range for y-axis in block parameters… --- ## [How to reset the phase for subsequent sweeps from VCO?](https://www.ruby-forum.com/t/how-to-reset-the-phase-for-subsequent-sweeps-from-vco/230889)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 4\ **Last updated:** [July 11, 2014, 4:31am UTC](https://www.ruby-forum.com/t/how-to-reset-the-phase-for-subsequent-sweeps-from-vco/230889 "2014-07-11T04:31:01Z")
Hi, I am using the VCO block in GRC to generate complex-valued sweeps with BW of 50 KHz and a sweep time of 1 second. The VCO is driven by the sawtooth signal generator in GRC. The problem I am facing is that subse… --- ## [For Sale USRP N210 w/Daughterboards](https://www.ruby-forum.com/t/for-sale-usrp-n210-w-daughterboards/230893)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [July 10, 2014, 9:58pm UTC](https://www.ruby-forum.com/t/for-sale-usrp-n210-w-daughterboards/230893 "2014-07-10T21:58:51Z")
I’m selling my USRP N210 (Rev 4) along with the following daughterboards together as a kit. BasicRX 1-250 Mhz Rx BasicTX 1-250 Mhz Tx LFRX 0-30 Mhz Rx WBX 0-2200 Mhz Tx/Rx XCVR2450 2.4-2.5 GHz, 4.9-5.9 GHz Tx/Rx … --- ## [Error installing out-of-tree-module](https://www.ruby-forum.com/t/error-installing-out-of-tree-module/230887)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 1\ **Last updated:** [July 10, 2014, 8:08pm UTC](https://www.ruby-forum.com/t/error-installing-out-of-tree-module/230887 "2014-07-10T20:08:37Z")
Discuss-gnuradio mailing list removed\_email\_address@domain.invalid https://lists.gnu.org/mailman/listinfo/discuss-gnuradio --- ## ['Counts' in WX Scope Plot](https://www.ruby-forum.com/t/counts-in-wx-scope-plot/230867)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 5\ **Last updated:** [July 10, 2014, 3:27pm UTC](https://www.ruby-forum.com/t/counts-in-wx-scope-plot/230867 "2014-07-10T15:27:57Z")
The vertical axis in Scope Plot is labelled as Counts. What does it mean? How is it related to the physical parameters of the signal like amplitude/power? – View this message in context: http://gnuradio.4.n7.nabble… --- ## [Gr-bluetooth](https://www.ruby-forum.com/t/gr-bluetooth/230875)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 2\ **Last updated:** [July 10, 2014, 11:23am UTC](https://www.ruby-forum.com/t/gr-bluetooth/230875 "2014-07-10T11:23:00Z")
Hello all, I’ve updated the gr-bluetooth \[1\] code to be compatible with GNU Radio 3.7. I’m trying to use it, but there’s a segmentation fault that I need to figure out. Has anyone done anything with gr-bluetooth recen… --- ## [Gr-bluetooth](https://www.ruby-forum.com/t/gr-bluetooth/230876)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [July 10, 2014, 3:49am UTC](https://www.ruby-forum.com/t/gr-bluetooth/230876 "2014-07-10T03:49:08Z")
Hello all, I’ve updated the gr-bluetooth \[1\] code to be compatible with GNU Radio 3.7. I’m trying to use it, but there’s a segmentation fault that I need to figure out. Has anyone done anything with gr-bluetooth recen… --- ## [BER measurement for GMSK transmission with USRP wirelessly](https://www.ruby-forum.com/t/ber-measurement-for-gmsk-transmission-with-usrp-wirelessly/230781)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 2\ **Last updated:** [July 9, 2014, 12:54pm UTC](https://www.ruby-forum.com/t/ber-measurement-for-gmsk-transmission-with-usrp-wirelessly/230781 "2014-07-09T12:54:31Z")
Good day everyone, My sincere apology in advance if this question has been asked before, but i tried search thru the archives but to no avail. Currently, I am trying to calculate the BER for GMSK, But first I started… --- ## [How to install GNU Radio version 3.6 series on ubuntu 14.04](https://www.ruby-forum.com/t/how-to-install-gnu-radio-version-3-6-series-on-ubuntu-14-04/230865)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [July 9, 2014, 7:52am UTC](https://www.ruby-forum.com/t/how-to-install-gnu-radio-version-3-6-series-on-ubuntu-14-04/230865 "2014-07-09T07:52:03Z")
How to install GNU Radio version 3.6 series on ubuntu 14.04. While installing i am getting error \[ 38%\] Building CXX object gnuradio-core/src/lib/swig/CMakeFiles/\_gnuradio\_core\_general.dir/gnuradio\_core\_generalPYTHON\_… --- ## [Unable to install gnuradio-3.4.2](https://www.ruby-forum.com/t/unable-to-install-gnuradio-3-4-2/230820)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 2\ **Last updated:** [July 9, 2014, 2:13am UTC](https://www.ruby-forum.com/t/unable-to-install-gnuradio-3-4-2/230820 "2014-07-09T02:13:30Z")
Hi list, try to install older version of gnuradio (3.4.2 with gcc-4.4 on ubuntu 12.04) but after successful make, when trying make install, getting following errors: test -z “/usr/local/lib/python2.7/dist-packages/gr… [Previous page](https://www.ruby-forum.com/c/gnu-radio/15.md?page=61) [Next page](https://www.ruby-forum.com/c/gnu-radio/15.md?page=63)