# GNU Radio **URL:** https://www.ruby-forum.com/c/gnu-radio/15.md?page=52 [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:** 53 --- ## [Qa\_volk\_test\_all (Failed) & qa\_codec2\_vocoder (Failed) when running make test](https://www.ruby-forum.com/t/qa-volk-test-all-failed-qa-codec2-vocoder-failed-when-running-make-test/232099)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 2\ **Last updated:** [September 19, 2014, 5:57am UTC](https://www.ruby-forum.com/t/qa-volk-test-all-failed-qa-codec2-vocoder-failed-when-running-make-test/232099 "2014-09-19T05:57:17Z")
Hi, I have tried to follow instruction from: http://gnuradio.org/redmine/projects/gnuradio/wiki/BuildGuide, in order to build gnuradio manually from source. When i’ve reached the step make test command, it gives the … --- ## [Gnu Radio Companion Not Finding My OOT Module](https://www.ruby-forum.com/t/gnu-radio-companion-not-finding-my-oot-module/232120)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [September 18, 2014, 9:23pm UTC](https://www.ruby-forum.com/t/gnu-radio-companion-not-finding-my-oot-module/232120 "2014-09-18T21:23:31Z")
I have built an OOT using the gr\_modtool methods found in the OOT tutorial. I was successful in executing the build, make and make install commands. I am running gnu radio and gnu radio-companion on a MAC, OSX. It … --- ## [Blocks setting variables](https://www.ruby-forum.com/t/blocks-setting-variables/232109)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 1\ **Last updated:** [September 18, 2014, 7:46pm UTC](https://www.ruby-forum.com/t/blocks-setting-variables/232109 "2014-09-18T19:46:46Z")
Is there a way to have the C++ code of a block change the value of a variable for the rest of the flow graph? //\\ark. --- ## [Editing medium-to-large flow-graphs in GRC now \*agonizing\* slow](https://www.ruby-forum.com/t/editing-medium-to-large-flow-graphs-in-grc-now-agonizing-slow/231958)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 5\ **Last updated:** [September 18, 2014, 5:29pm UTC](https://www.ruby-forum.com/t/editing-medium-to-large-flow-graphs-in-grc-now-agonizing-slow/231958 "2014-09-18T17:29:21Z")
Has anyone else noticed that in recent GR, medium-to-large flow-graphs are now agonizingly slow to edit, even on relatively-capable machines? Larger graphs were always a tad sluggish, but it has now gotten to the poi… --- ## [Reset() for probe\_avg\_mag\_sqrd](https://www.ruby-forum.com/t/reset-for-probe-avg-mag-sqrd/231314)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 5\ **Last updated:** [September 18, 2014, 4:44pm UTC](https://www.ruby-forum.com/t/reset-for-probe-avg-mag-sqrd/231314 "2014-09-18T16:44:15Z")
Hello, my application is monitoring the RF level and often changeing the frequency. Unfortunately it takes some time for probe\_avg\_mag\_sqrd to adjust to the new RF level (about 2 seconds if old level -10dB and new le… --- ## [Preamble length](https://www.ruby-forum.com/t/preamble-length/232110)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [September 18, 2014, 3:10pm UTC](https://www.ruby-forum.com/t/preamble-length/232110 "2014-09-18T15:10:17Z")
Hello, What is the length of the preamble that is used in narrowband benchmark\_tx.py example, given BPSK is chosen for type of modulation? Is there a way to modify the length? Thanks, Zaher --- ## [Gr-mac in MacPorts](https://www.ruby-forum.com/t/gr-mac-in-macports/232079)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 3\ **Last updated:** [September 17, 2014, 3:40pm UTC](https://www.ruby-forum.com/t/gr-mac-in-macports/232079 "2014-09-17T15:40:03Z")
After hearing from a few OSX users this afternoon at GRCon14 that they were having issues getting gr-mac to build or function, I decided to get it into MacPorts. Thus, after a little work and a couple patches, it is … --- ## [Make test error](https://www.ruby-forum.com/t/make-test-error/231986)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 2\ **Last updated:** [September 17, 2014, 4:21am UTC](https://www.ruby-forum.com/t/make-test-error/231986 "2014-09-17T04:21:06Z")
hi, When I follow Gnuradio using “make test” and “ctest” to test my new how-to block, it returns RuntimeError: square\_ff(6): insufficient connected output ports (1 needed, 0 connected) As the following messages, I th… --- ## [(no subject)](https://www.ruby-forum.com/t/no-subject/232073)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [September 16, 2014, 11:52pm UTC](https://www.ruby-forum.com/t/no-subject/232073 "2014-09-16T23:52:01Z")
Hi, I am working on a USRP project. I am using a USRP N200 with a BasicRX daughter board to perform data streaming. I am using GRC 3.6.4.1 on a Ubuntu 12.04 machine. The USRP N200 is set to have a decimation factor o… --- ## [Voice transmission](https://www.ruby-forum.com/t/voice-transmission/232068)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [September 16, 2014, 6:38pm UTC](https://www.ruby-forum.com/t/voice-transmission/232068 "2014-09-16T18:38:26Z")
Good evening, I have a question: which are the blocks of a voice transmitter based on DQPSK mod? Audio source-\>packet encoder-\>DPSK MOD -\>UHD: USRP Sink I need a voice encoder and encrypt or the above scheme is corre… --- ## [Exposing packet informatoin](https://www.ruby-forum.com/t/exposing-packet-informatoin/232051)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 2\ **Last updated:** [September 16, 2014, 5:31pm UTC](https://www.ruby-forum.com/t/exposing-packet-informatoin/232051 "2014-09-16T17:31:00Z")
I wrote a VITA-49 deserializer block. How can I expose information like the sample rate extracted from the header to the other blocks in the system? //\\ark. --- ## [Python OOT Block on Windows](https://www.ruby-forum.com/t/python-oot-block-on-windows/232059)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 2\ **Last updated:** [September 16, 2014, 2:12pm UTC](https://www.ruby-forum.com/t/python-oot-block-on-windows/232059 "2014-09-16T14:12:58Z")
Hi, Is it possible to create an OOT module written in Python to run on windows without having to compile anything? I am hoping that I can drop a Python file and a GRC file somewhere and have them just run, seeing as … --- ## [Packet loss and BER OFDM/DQPSK](https://www.ruby-forum.com/t/packet-loss-and-ber-ofdm-dqpsk/232062)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [September 16, 2014, 1:58pm UTC](https://www.ruby-forum.com/t/packet-loss-and-ber-ofdm-dqpsk/232062 "2014-09-16T13:58:08Z")
Good morning, I’m evaluating the difference between a single carrier modulation and a multi carrier modulation, so I decided to implement a TX-RX system in GNURadio companion working with USRP N210. I’d like to plot … --- ## [References using in ofdm\_equalizer\_simpledfe](https://www.ruby-forum.com/t/references-using-in-ofdm-equalizer-simpledfe/231887)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 10\ **Last updated:** [September 15, 2014, 5:35pm UTC](https://www.ruby-forum.com/t/references-using-in-ofdm-equalizer-simpledfe/231887 "2014-09-15T17:35:55Z")
Hi Martin, Could you tell me the reference paper that you used in ofdm\_equalizer\_simpledfe? Thanks Tiankun --- ## [Phase synchronizing USRPs in GNU Radio](https://www.ruby-forum.com/t/phase-synchronizing-usrps-in-gnu-radio/232035)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 2\ **Last updated:** [September 15, 2014, 3:44pm UTC](https://www.ruby-forum.com/t/phase-synchronizing-usrps-in-gnu-radio/232035 "2014-09-15T15:44:43Z")
Hi all, I am trying to phase synchronize multiple usrp’s using 10 MHz reference and 1 pps. I was able to get them synchronised but with constant phase offset between. But every time I retune or rerun the flowgraph t… --- ## [How to install gnuradio with pybombs](https://www.ruby-forum.com/t/how-to-install-gnuradio-with-pybombs/231884)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 10\ **Last updated:** [September 15, 2014, 12:37pm UTC](https://www.ruby-forum.com/t/how-to-install-gnuradio-with-pybombs/231884 "2014-09-15T12:37:01Z")
Hi everyone, I’m very new to gnuradio, & i’m trying to follow instructions from http://gnuradio.org/redmine/projects/pybombs/wiki/QuickStart. On the page it is stated that, Upon running the first install command you … --- ## [How to save a matrix of integers into a file using GNU Radio](https://www.ruby-forum.com/t/how-to-save-a-matrix-of-integers-into-a-file-using-gnu-radio/232001)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 2\ **Last updated:** [September 15, 2014, 10:29am UTC](https://www.ruby-forum.com/t/how-to-save-a-matrix-of-integers-into-a-file-using-gnu-radio/232001 "2014-09-15T10:29:30Z")
Dear all, I want to save a matrix of integers into a file, similar to .mat file in MATLAB. To be more specific, my desire block should receive a stream of integers, convert it to MxN matrix and save this matrix so tha… --- ## [Problem with gnuradio-companion and HackRF](https://www.ruby-forum.com/t/problem-with-gnuradio-companion-and-hackrf/231951)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 7\ **Last updated:** [September 15, 2014, 1:33am UTC](https://www.ruby-forum.com/t/problem-with-gnuradio-companion-and-hackrf/231951 "2014-09-15T01:33:12Z")
I just reinstalled Ubuntu on my computer, I compiled GNURadio from source. I’m now running GNU Radio Companion 3.7.6git-1-g01deede3 With GNU Radio Companion I can access and listen to radio stations on my RTL-SDR don… --- ## [Regarding Transceiver design on GNUradio](https://www.ruby-forum.com/t/regarding-transceiver-design-on-gnuradio/232029)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 1\ **Last updated:** [September 14, 2014, 5:52pm UTC](https://www.ruby-forum.com/t/regarding-transceiver-design-on-gnuradio/232029 "2014-09-14T17:52:02Z")
Dear all, I am working on re-configurable Software defined radio based multiband transceiver (initially for ISM band 2.4 GHz).for that i am using GNU Radio for software design .For hardware design i come to know t… --- ## [GRC running for 45 minutes only](https://www.ruby-forum.com/t/grc-running-for-45-minutes-only/232020)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 1\ **Last updated:** [September 13, 2014, 6:39pm UTC](https://www.ruby-forum.com/t/grc-running-for-45-minutes-only/232020 "2014-09-13T18:39:02Z")
Hi, Now my GRC runs for 45-60 minutes only, after that the flowgraph is killed on its own. No error message provided. Anyone can assist? Thanks Dominique --- ## [Using control port monitor](https://www.ruby-forum.com/t/using-control-port-monitor/232008)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 6\ **Last updated:** [September 13, 2014, 6:32pm UTC](https://www.ruby-forum.com/t/using-control-port-monitor/232008 "2014-09-13T18:32:52Z")
Hello all, I have recently installed GNURadio new version of 3.7.5. I want to use “CtrlPort Monitor” but in GRC this is under “None” module instead of “Control Port” module!! I enabled the control port as explained: h… --- ## [Hier Block - Message and Stream Ports - Port of Of Range](https://www.ruby-forum.com/t/hier-block-message-and-stream-ports-port-of-of-range/232015)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 1\ **Last updated:** [September 13, 2014, 5:52pm UTC](https://www.ruby-forum.com/t/hier-block-message-and-stream-ports-port-of-of-range/232015 "2014-09-13T17:52:48Z")
I have a hier block with a couple of message i/o and complex stream i/o. After including the hier block in a top\_block and running, it threw out an error about input ports being out of range. It turned out that it ha… --- ## [A little bug in GNURadio 3.7.5 API page](https://www.ruby-forum.com/t/a-little-bug-in-gnuradio-3-7-5-api-page/232012)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 1\ **Last updated:** [September 13, 2014, 2:28am UTC](https://www.ruby-forum.com/t/a-little-bug-in-gnuradio-3-7-5-api-page/232012 "2014-09-13T02:28:35Z")
Hello, the inlude files have the Tom R. path: http://gnuradio.org/doc/doxygen/classgr\_1\_1filter\_1\_1rational\_\_resampler\_\_base\_\_fff.html #include \< /home/trondeau/code/gnuradio/build/master/gr-filter/include/gnuradio/f… --- ## [Problem installing GNURADIO on ODROID-XU UBUNTU 12.04LTS](https://www.ruby-forum.com/t/problem-installing-gnuradio-on-odroid-xu-ubuntu-12-04lts/232006)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 1\ **Last updated:** [September 12, 2014, 5:37pm UTC](https://www.ruby-forum.com/t/problem-installing-gnuradio-on-odroid-xu-ubuntu-12-04lts/232006 "2014-09-12T17:37:08Z")
Hi, I’m trying to install gnuradio with Build Gnuradio Script on ODROID-XU . First of all, when the script looks for libraries, a first error occurs for libqwtplot3d-qt4-dev, and it seems that there is no package ava… --- ## [Paging all students: Short survey](https://www.ruby-forum.com/t/paging-all-students-short-survey/231997)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [September 11, 2014, 11:19pm UTC](https://www.ruby-forum.com/t/paging-all-students-short-survey/231997 "2014-09-11T23:19:59Z")
Dear list, I sent this request for participation out a while back. I’m currently working on a presentation for GRCon, and I can still use some feedback on this survey. Thanks! == Original request: == Hey everyone, a… --- ## [European Workshop on Testbed-Based Wireless Research - Call for Contributions](https://www.ruby-forum.com/t/european-workshop-on-testbed-based-wireless-research-call-for-contributions/231990)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [September 11, 2014, 11:24am UTC](https://www.ruby-forum.com/t/european-workshop-on-testbed-based-wireless-research-call-for-contributions/231990 "2014-09-11T11:24:38Z")
European Workshop on Testbed-Based Wireless Research November 19th 2014 KTH Main Campus, Stockholm, Sweden web: European workshop on testbed based wireless research Following up on the successful “scandinavian worksh… --- ## [Cannot play wav files made by wav-file-sink on many softwares](https://www.ruby-forum.com/t/cannot-play-wav-files-made-by-wav-file-sink-on-many-softwares/231988)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [September 11, 2014, 10:00am UTC](https://www.ruby-forum.com/t/cannot-play-wav-files-made-by-wav-file-sink-on-many-softwares/231988 "2014-09-11T10:00:04Z")
Hello. I use gnuradio on ubuntu14.04. I made wav files new ones by band-pass-filter. I saved new ones as wav file by wav-file-sink. The new wav files can be played by video software being as default on ubuntu. But … --- ## [Re: Editing medium-to-large flow-graphs in GRC now \*agonizing\* slow](https://www.ruby-forum.com/t/re-editing-medium-to-large-flow-graphs-in-grc-now-agonizing-slow/231962)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 5\ **Last updated:** [September 10, 2014, 8:22pm UTC](https://www.ruby-forum.com/t/re-editing-medium-to-large-flow-graphs-in-grc-now-agonizing-slow/231962 "2014-09-10T20:22:16Z")
Yes, I have the same issue with v3.7.5 Thanks Tiankun Mike J. removed\_email\_address@domain.invalid编写： --- ## [AttributeError: 'module' object has no attribute 'block\_name'](https://www.ruby-forum.com/t/attributeerror-module-object-has-no-attribute-block-name/231864)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 4\ **Last updated:** [September 10, 2014, 11:58am UTC](https://www.ruby-forum.com/t/attributeerror-module-object-has-no-attribute-block-name/231864 "2014-09-10T11:58:54Z")
Hi, I created a C++ block with gr\_modtool, following the commands: $ gr\_modtool newmod PWagc $ gr\_modtool add -t general power\_control I written and compiled my block with commands: $cmake …/ && make && sudo make i… --- ## [Clock Recovery MM](https://www.ruby-forum.com/t/clock-recovery-mm/231950)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 2\ **Last updated:** [September 9, 2014, 9:22pm UTC](https://www.ruby-forum.com/t/clock-recovery-mm/231950 "2014-09-09T21:22:31Z")
Hi all, looking at the clock recovery MM code, I wonder if d\_omega\_relative\_limit is a relative or absolute deviation from d\_omega. Here it looks like absolute https://github.com/gnuradio/gnuradio/blob/next/gr-digita… [Previous page](https://www.ruby-forum.com/c/gnu-radio/15.md?page=51) [Next page](https://www.ruby-forum.com/c/gnu-radio/15.md?page=53)