# GNU Radio **URL:** https://www.ruby-forum.com/c/gnu-radio/15.md?page=23 [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:** 24 --- ## [E310 shutdown issue](https://www.ruby-forum.com/t/e310-shutdown-issue/241881)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 2\ **Last updated:** [May 8, 2015, 2:38pm UTC](https://www.ruby-forum.com/t/e310-shutdown-issue/241881 "2015-05-08T14:38:18Z")
My e310’s (two that I’ve tested) are hanging at unmounting the mmcblk0p1 partition on shutdown, occasionally causing the filesystem to be corrupted. Any ideas what is happening and how to get a clean shutdown? Mark --- ## [1. Re: Multipath Fading (Marcus M?ller)](https://www.ruby-forum.com/t/1-re-multipath-fading-marcus-m-ller/241879)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 1\ **Last updated:** [May 8, 2015, 12:15pm UTC](https://www.ruby-forum.com/t/1-re-multipath-fading-marcus-m-ller/241879 "2015-05-08T12:15:09Z")
Hello, I working on a project wireless channel emulator. I have to implement multipath fading in gnu radio using signal source from usrp. I have tried using the fading blocks but i am not able to identify whether mu… --- ## [Detecting unipolar and repeating preamble on wired communications?](https://www.ruby-forum.com/t/detecting-unipolar-and-repeating-preamble-on-wired-communications/241837)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 2\ **Last updated:** [May 8, 2015, 7:00am UTC](https://www.ruby-forum.com/t/detecting-unipolar-and-repeating-preamble-on-wired-communications/241837 "2015-05-08T07:00:52Z")
I am trying to implement a preamble detection. A couple of things that, I’m not using wireless communication but wired communication. And also, I’m not using a bipolar signal, but a unipolar signal. (Bipolar: a signa… --- ## [Header Payload Demux Freeze](https://www.ruby-forum.com/t/header-payload-demux-freeze/241865)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 3\ **Last updated:** [May 7, 2015, 8:58pm UTC](https://www.ruby-forum.com/t/header-payload-demux-freeze/241865 "2015-05-07T20:58:34Z")
Hello all, I’m experiencing some odd behavior with the Header Payload Demux (HPD) block. I’m using a Tx/Rx loopback simulation with full synchronization and channel model in the loop. The simulation begins with all c… --- ## [Announcing GNU Radio Conference 2015](https://www.ruby-forum.com/t/announcing-gnu-radio-conference-2015/241472)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 2\ **Last updated:** [May 7, 2015, 8:45pm UTC](https://www.ruby-forum.com/t/announcing-gnu-radio-conference-2015/241472 "2015-05-07T20:45:08Z")
Greetings, We are happy and excited to finally announce GNU Radio Conference 2015! GRCon15 is the next installment of the fastest growing SDR-focused conference in the world. GRCon is becoming the go-to event for for … --- ## [Control port on 3.7.8?](https://www.ruby-forum.com/t/control-port-on-3-7-8/241861)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 3\ **Last updated:** [May 7, 2015, 3:55pm UTC](https://www.ruby-forum.com/t/control-port-on-3-7-8/241861 "2015-05-07T15:55:21Z")
After pulling the latest version of gnuradio, and remaking/installing/etc I am trying to run the application “pfb\_sync\_test.grc” in the examples directory of control port. It is giving me the following error: ======… --- ## [Re: Multipath Fading](https://www.ruby-forum.com/t/re-multipath-fading/241872)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 1\ **Last updated:** [May 7, 2015, 11:42am UTC](https://www.ruby-forum.com/t/re-multipath-fading/241872 "2015-05-07T11:42:59Z")
\---------- Forwarded message ---------- From: Ritvik P. removed\_email\_address@domain.invalid Date: Fri, May 1, 2015 at 9:59 AM Subject: Re: \[Discuss-gnuradio\] Multipath Fading To: Mostafa A. removed\_email\_address@dom… --- ## [Re: How make a \*.t block](https://www.ruby-forum.com/t/re-how-make-a-t-block/241866)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 0\ **Last updated:** [May 6, 2015, 10:02pm UTC](https://www.ruby-forum.com/t/re-how-make-a-t-block/241866 "2015-05-06T22:02:10Z")
Tahnk you very much for your reply. I’ve tried different time with templates,but I was not able to obtain a result(cmake and make finish errors,but I suppose that swig crash,because python scripts are not able to acc… --- ## [Bitbake GNU radio for Zynq](https://www.ruby-forum.com/t/bitbake-gnu-radio-for-zynq/241818)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 6\ **Last updated:** [May 6, 2015, 6:49pm UTC](https://www.ruby-forum.com/t/bitbake-gnu-radio-for-zynq/241818 "2015-05-06T18:49:23Z")
Hi, I’m a trying to compile GNU radio for Zynq using the example described here: https://gnuradio.org/redmine/projects/gnuradio/wiki/Zynq The instructions do have an out of date warning, and I’m just trying to figur… --- ## [GRC tooltip problem](https://www.ruby-forum.com/t/grc-tooltip-problem/241859)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 0\ **Last updated:** [May 6, 2015, 4:49pm UTC](https://www.ruby-forum.com/t/grc-tooltip-problem/241859 "2015-05-06T16:49:16Z")
dear GR community, I have an OOT module for e.g. “QPSK Mod”, implemented as python source code. the python class contains a docstring, which I expect to see in the GRC tooltip. instead I see “undocumented” (cf. attach… --- ## ["Catching" end of flowgraph execution with GUI](https://www.ruby-forum.com/t/catching-end-of-flowgraph-execution-with-gui/241846)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 3\ **Last updated:** [May 6, 2015, 11:48am UTC](https://www.ruby-forum.com/t/catching-end-of-flowgraph-execution-with-gui/241846 "2015-05-06T11:48:12Z")
Hi all (again), is there any way to catch that my flowgraph has finished execution, to reconfigure it after that and to be able to watch signals in GUI? In my application I I would like to set some start and end value… --- ## ["Run To Completion" does not work](https://www.ruby-forum.com/t/run-to-completion-does-not-work/241445)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 1\ **Last updated:** [May 6, 2015, 11:21am UTC](https://www.ruby-forum.com/t/run-to-completion-does-not-work/241445 "2015-05-06T11:21:51Z")
For the schematic “tst\_terminate1.grc” attached the script does not terminate after writing the desired number of samples. Consequently I have to stop it applying “^c”. N.b. If I replace “PSK Mod” by “GMSK Mod”, then … --- ## [How make a \*.t block](https://www.ruby-forum.com/t/how-make-a-t-block/241854)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 1\ **Last updated:** [May 6, 2015, 8:37am UTC](https://www.ruby-forum.com/t/how-make-a-t-block/241854 "2015-05-06T08:37:10Z")
Looking inside gnuradio,I’ve found blocks like divide\_XX where relative files have an extension .t (like divide\_XX\_impl.cc.t )…in this way,is possible to manage different types for the same block. How is posssible to … --- ## [Gr-tutorial/examples/tutorial4 Python module missing](https://www.ruby-forum.com/t/gr-tutorial-examples-tutorial4-python-module-missing/241835)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 2\ **Last updated:** [May 6, 2015, 12:53am UTC](https://www.ruby-forum.com/t/gr-tutorial-examples-tutorial4-python-module-missing/241835 "2015-05-06T00:53:20Z")
I have downloaded the most recent version of the gr-tutorial from github and installed it using cd gr-tutorial mkdir build cd build cmake … make sudo make install sudo ldconfig Everything works fine up to this p… --- ## [Error when calling method of base class block](https://www.ruby-forum.com/t/error-when-calling-method-of-base-class-block/241823)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 2\ **Last updated:** [May 5, 2015, 11:30am UTC](https://www.ruby-forum.com/t/error-when-calling-method-of-base-class-block/241823 "2015-05-05T11:30:04Z")
Hi all guys, I am making a file sink block with limited number of elements allowed to be written in a file. I coded my block in the same way as it was done in file\_sink block found in blocks module. Namely, I derived… --- ## [FCDproplus: "FunCumb Dongle V2.0 soundcard found but not controlpart"](https://www.ruby-forum.com/t/fcdproplus-funcumb-dongle-v2-0-soundcard-found-but-not-controlpart/241834)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 1\ **Last updated:** [May 5, 2015, 7:15am UTC](https://www.ruby-forum.com/t/fcdproplus-funcumb-dongle-v2-0-soundcard-found-but-not-controlpart/241834 "2015-05-05T07:15:21Z")
There were a few threads a while back where this problem was discussed.It seemed the issue was never debugged, just disappeared after a clean install. About as clean as I know to make it: Running Ubuntu 14.04 LTS fro… --- ## [Compiling gnuradio from source on GENTOO Linux failed](https://www.ruby-forum.com/t/compiling-gnuradio-from-source-on-gentoo-linux-failed/241534)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 2\ **Last updated:** [May 5, 2015, 6:28am UTC](https://www.ruby-forum.com/t/compiling-gnuradio-from-source-on-gentoo-linux-failed/241534 "2015-05-05T06:28:37Z")
Hi, I am trying to build gnuradio on a recent Gentoo system from source. I tried to use emerge/portage for that, but it fails in a configuration step. The system: Recent Gentoo Linux gcc version 4.8.4 (Gentoo 4.8.4… --- ## [HermesNB with Pybombs](https://www.ruby-forum.com/t/hermesnb-with-pybombs/241832)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 2\ **Last updated:** [May 5, 2015, 6:23am UTC](https://www.ruby-forum.com/t/hermesnb-with-pybombs/241832 "2015-05-05T06:23:57Z")
Tom, Heard your talk on this work. Went digging around in the new Pybombs list but didn’t notice anything that looked HPSDR-like. Before I go to TAPR subversion could you give us a pointer to the latest version fo… --- ## [Error after installing UHD\_003.009](https://www.ruby-forum.com/t/error-after-installing-uhd-003-009/241831)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 0\ **Last updated:** [May 5, 2015, 12:23am UTC](https://www.ruby-forum.com/t/error-after-installing-uhd-003-009/241831 "2015-05-05T00:23:40Z")
Hi all, I updated to the new uhd version on x310. This did not show any error while installing. But I am getting error while running. linux; GNU C++ version 4.8.2; Boost\_105500; UHD\_003.009.git-0-unknown RuntimeError… --- ## [Announcing NEWSDR at WPI on Thr/Fri May 21/22](https://www.ruby-forum.com/t/announcing-newsdr-at-wpi-on-thr-fri-may-21-22/241829)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 0\ **Last updated:** [May 4, 2015, 7:20pm UTC](https://www.ruby-forum.com/t/announcing-newsdr-at-wpi-on-thr-fri-may-21-22/241829 "2015-05-04T19:20:19Z")
NEWSDR 2015 \* \* New England Workshop on Software-Defined Radio \* … --- ## [Build-gnuradio uhd build failure](https://www.ruby-forum.com/t/build-gnuradio-uhd-build-failure/241768)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 3\ **Last updated:** [May 4, 2015, 4:06pm UTC](https://www.ruby-forum.com/t/build-gnuradio-uhd-build-failure/241768 "2015-05-04T16:06:56Z")
I’m trying to put gnuradio on a fresh installation of Linux Mint 17.1, 64 bit. The build-gnuradio script was downloaded from SBRAC last night. I get throught the prerequisites and git fetch OK, but when the “Building… --- ## [Terminating flowgraph inside](https://www.ruby-forum.com/t/terminating-flowgraph-inside/241811)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 2\ **Last updated:** [May 4, 2015, 12:33pm UTC](https://www.ruby-forum.com/t/terminating-flowgraph-inside/241811 "2015-05-04T12:33:42Z")
Hello again, is there any way that block inside a flowgraph terminate that flowgraph should stop. Something like when source block returns -1 from work function. What happens when arbitrary block in the middle of the… --- ## [How can I remove a OOT block from GRC?](https://www.ruby-forum.com/t/how-can-i-remove-a-oot-block-from-grc/241815)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 0\ **Last updated:** [May 4, 2015, 1:44am UTC](https://www.ruby-forum.com/t/how-can-i-remove-a-oot-block-from-grc/241815 "2015-05-04T01:44:04Z")
Hi, I have created my own OOT module with couple blocks, I have used gr\_modtool remove command to remove some unwanted blocks in my OOT module folder, after I remake and reinstall the module, i still find those block… --- ## [Benchmark\_rx.py segmentation fault](https://www.ruby-forum.com/t/benchmark-rx-py-segmentation-fault/241792)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 5\ **Last updated:** [May 1, 2015, 8:02pm UTC](https://www.ruby-forum.com/t/benchmark-rx-py-segmentation-fault/241792 "2015-05-01T20:02:19Z")
Hello, I’m using Ubuntu 14.04, gnuradio 3.7.8, USRP N210 and the latest UHD. Everything was recently (3 days ago) updated to newest versions and USRP’s reflashed. I have custom flowgraphs that use the USRP N210’s tha… --- ## [GRC Feature Request](https://www.ruby-forum.com/t/grc-feature-request/241793)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 2\ **Last updated:** [May 1, 2015, 7:45pm UTC](https://www.ruby-forum.com/t/grc-feature-request/241793 "2015-05-01T19:45:57Z")
Hi all, In the gui config window that pops up when you double click a block in grc, in the documentation tab, two buttons that you can click that open up either the block.cc source file or the block.h source file. Ta… --- ## [The build-gnuradio install script fails for Ubuntu 15.04](https://www.ruby-forum.com/t/the-build-gnuradio-install-script-fails-for-ubuntu-15-04/241794)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 2\ **Last updated:** [May 1, 2015, 8:13am UTC](https://www.ruby-forum.com/t/the-build-gnuradio-install-script-fails-for-ubuntu-15-04/241794 "2015-05-01T08:13:07Z")
Hi, I’ve noticed that the script in http://gnuradio.org/redmine/projects/gnuradio/wiki/InstallingGRFromSource fails for Ubuntu 15.04. The fix is simple, just add version 15 in the line 509. I’ve attached the script… --- ## [ISDB-T Modulator](https://www.ruby-forum.com/t/isdb-t-modulator/241615)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 1\ **Last updated:** [May 1, 2015, 6:25am UTC](https://www.ruby-forum.com/t/isdb-t-modulator/241615 "2015-05-01T06:25:03Z")
Hello everyone, In the past I have posted some messages here asking for help (which I have got) for my project. Now I would like to share to you that I was able to finish it. I have developed a ISDB-T modulator in G… --- ## [GNU Radio on Air Gapped Computer](https://www.ruby-forum.com/t/gnu-radio-on-air-gapped-computer/241775)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 11\ **Last updated:** [May 1, 2015, 12:33am UTC](https://www.ruby-forum.com/t/gnu-radio-on-air-gapped-computer/241775 "2015-05-01T00:33:57Z")
I originally installed GNU Radio on this computer when it was networked via pybombs. Since then, the computer has become air gapped (no internet connection allowed). I need to update the install to the latest versions … --- ## [QT GUI Text Panel for my custom C++ block](https://www.ruby-forum.com/t/qt-gui-text-panel-for-my-custom-c-block/241795)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 0\ **Last updated:** [April 30, 2015, 8:46pm UTC](https://www.ruby-forum.com/t/qt-gui-text-panel-for-my-custom-c-block/241795 "2015-04-30T20:46:07Z")
So… I just want to say a public “thanks” to Volker S. for his work on the gr-display module. It is not only functional, but the part of it that handles the QT displays is separated enough, and simple enough, to make i… --- ## [GRCon15\> Website & Registration](https://www.ruby-forum.com/t/grcon15-website-registration/241706)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 1\ **Last updated:** [April 30, 2015, 5:26pm UTC](https://www.ruby-forum.com/t/grcon15-website-registration/241706 "2015-04-30T17:26:53Z")
We have a basic website up for GRCon15 \< GNU Radio Conference 2015 — Rondeau Research \>, which includes EventBright registration for the New Developers Day (Monday, August 24) and the Developers Conference (Tuesday, A… [Previous page](https://www.ruby-forum.com/c/gnu-radio/15.md?page=22) [Next page](https://www.ruby-forum.com/c/gnu-radio/15.md?page=24)