# GNU Radio **URL:** https://www.ruby-forum.com/c/gnu-radio/15.md?page=8 [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:** 9 --- ## [Front Panel GPIO on Ettus X310](https://www.ruby-forum.com/t/front-panel-gpio-on-ettus-x310/242169)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 9\ **Last updated:** [September 1, 2015, 5:13pm UTC](https://www.ruby-forum.com/t/front-panel-gpio-on-ettus-x310/242169 "2015-09-01T17:13:44Z")
Hi, I would like to command the Front Panel GPIO pins for use as a trigger signal to another piece of equipment under gnuradio and python (I’m not a C++ programmer). I’ve been trying unsuccessfully to use the UHD mu… --- ## [Import Out of Tree module in another Out of Tree module](https://www.ruby-forum.com/t/import-out-of-tree-module-in-another-out-of-tree-module/243210)
**Author:** [@Rafa\_F](https://www.ruby-forum.com/u/Rafa_F)\ **Replies:** 0\ **Last updated:** [September 1, 2015, 4:40pm UTC](https://www.ruby-forum.com/t/import-out-of-tree-module-in-another-out-of-tree-module/243210 "2015-09-01T16:40:24Z")
Good evening, i am trying to import an out of tree module (module\_A) inside another out of tree module (module\_B) in order to be able to include header files from one to another.How can that be achieved ,and what ch… --- ## [Re: Dr Mitola's Keynote slides](https://www.ruby-forum.com/t/re-dr-mitolas-keynote-slides/243202)
**Author:** [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\ **Replies:** 0\ **Last updated:** [September 1, 2015, 1:31pm UTC](https://www.ruby-forum.com/t/re-dr-mitolas-keynote-slides/243202 "2015-09-01T13:31:42Z")
Discuss-gnuradio mailing list removed\_email\_address@domain.invalid https://lists.gnu.org/mailman/listinfo/discuss-gnuradio --- ## [Building GNU Radio with previous Boost version](https://www.ruby-forum.com/t/building-gnu-radio-with-previous-boost-version/243009)
**Author:** [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\ **Replies:** 7\ **Last updated:** [September 1, 2015, 1:19pm UTC](https://www.ruby-forum.com/t/building-gnu-radio-with-previous-boost-version/243009 "2015-09-01T13:19:26Z")
?Hi guys, For a number of complicated reasons I would like to build GNU Radio with an older version of Boost. Specifically 1.49. Thanks, David NOTE: The information in this email and any attachments may be confide… --- ## [\[UHD\] Release Announcement 3.9.0](https://www.ruby-forum.com/t/uhd-release-announcement-3-9-0/243197)
**Author:** [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\ **Replies:** 0\ **Last updated:** [September 1, 2015, 3:55am UTC](https://www.ruby-forum.com/t/uhd-release-announcement-3-9-0/243197 "2015-09-01T03:55:43Z")
Dear USRP users, after nearly 2 weeks of testing, the release candidate was deemed fit (with minor changes) for release, and as such I present the 3.9.0 release of UHD! The list of changes is pretty long, so I’ll ref… --- ## [Ofdm plateau\_detector\_fb\_impl//ofdm\_sync\_sc\_cfb\_impl](https://www.ruby-forum.com/t/ofdm-plateau-detector-fb-impl-ofdm-sync-sc-cfb-impl/243192)
**Author:** [@Rafa\_F](https://www.ruby-forum.com/u/Rafa_F)\ **Replies:** 1\ **Last updated:** [August 31, 2015, 11:08pm UTC](https://www.ruby-forum.com/t/ofdm-plateau-detector-fb-impl-ofdm-sync-sc-cfb-impl/243192 "2015-08-31T23:08:51Z")
Hi all, I have a question on the synchronization of ofdm example,namely the sch&cox source code. The plateau\_detector\_fb\_impl.cc can find the plateau,and then header\_payload\_demux\_impl can find the head data. … --- ## [Using the UHD API for Python Programming](https://www.ruby-forum.com/t/using-the-uhd-api-for-python-programming/220867)
**Author:** [@aris](https://www.ruby-forum.com/u/aris)\ **Replies:** 13\ **Last updated:** [August 31, 2015, 9:50pm UTC](https://www.ruby-forum.com/t/using-the-uhd-api-for-python-programming/220867 "2015-08-31T21:50:17Z")
Hi all, I’m having some trouble using the C++ UHD API for writing Python code. I understand that the code has been SWIG’d from C++ to Python. Specifically, the C++ code I want to convert to Python is: uhd::stream\_cmd\_… --- ## [Dr Mitola's Keynote slides](https://www.ruby-forum.com/t/dr-mitolas-keynote-slides/243195)
**Author:** [@Rafa\_F](https://www.ruby-forum.com/u/Rafa_F)\ **Replies:** 1\ **Last updated:** [August 31, 2015, 8:51pm UTC](https://www.ruby-forum.com/t/dr-mitolas-keynote-slides/243195 "2015-08-31T20:51:35Z")
Discuss-gnuradio mailing list removed\_email\_address@domain.invalid https://lists.gnu.org/mailman/listinfo/discuss-gnuradio --- ## [Changing code rate (FEC)](https://www.ruby-forum.com/t/changing-code-rate-fec/243158)
**Author:** [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\ **Replies:** 2\ **Last updated:** [August 31, 2015, 8:31pm UTC](https://www.ruby-forum.com/t/changing-code-rate-fec/243158 "2015-08-31T20:31:15Z")
Hi, I would like to be able to change the code rate with PSK and QAM modulations (e.g QPSK 3/4, 16QAM 1/2). I was thinking of using a FEC encoder/decoder as you can see in the attached files but it doesn’t really wor… --- ## [Re: Better approach for FEC](https://www.ruby-forum.com/t/re-better-approach-for-fec/243154)
**Author:** [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\ **Replies:** 2\ **Last updated:** [August 31, 2015, 7:37pm UTC](https://www.ruby-forum.com/t/re-better-approach-for-fec/243154 "2015-08-31T19:37:23Z")
On Tue, Aug 25, 2015 at 11:36 PM, bob wole removed\_email\_address@domain.invalid wrote: Asynchronus). Are there any difference(s) performance wise? Which one should is better for my system? I have attached a picture o… --- ## [Path issue with pybombs env](https://www.ruby-forum.com/t/path-issue-with-pybombs-env/243188)
**Author:** [@Rafa\_F](https://www.ruby-forum.com/u/Rafa_F)\ **Replies:** 0\ **Last updated:** [August 31, 2015, 5:34am UTC](https://www.ruby-forum.com/t/path-issue-with-pybombs-env/243188 "2015-08-31T05:34:25Z")
Greetings all, Could someone confirm this as a problem? Base system: Win 7VM: VMPlayer free v10OS: Ubunto v14.04ltspybombs download: git clone git://github.com/gnuradio/pybombs We have an invalid path entry for this … --- ## [Ahrpt](https://www.ruby-forum.com/t/ahrpt/243183)
**Author:** [@Rafa\_F](https://www.ruby-forum.com/u/Rafa_F)\ **Replies:** 0\ **Last updated:** [August 30, 2015, 3:22pm UTC](https://www.ruby-forum.com/t/ahrpt/243183 "2015-08-30T15:22:06Z")
Hello, I have managed to get the gr-noaa modules working quite nicely on HRPT signals from the NOAA satellites. I have also attempted to detect strong signals from METOP-B and METEOR-M2. In the case of METEO… --- ## [Installing OOT Module on Mac](https://www.ruby-forum.com/t/installing-oot-module-on-mac/243179)
**Author:** [@Rafa\_F](https://www.ruby-forum.com/u/Rafa_F)\ **Replies:** 1\ **Last updated:** [August 30, 2015, 9:08am UTC](https://www.ruby-forum.com/t/installing-oot-module-on-mac/243179 "2015-08-30T09:08:49Z")
Hello, I’m using GNURadio 3.7.8 installed from MacPorts on a MacBook Air. I have tried to create a custom module on my MacBook Air using gr\_modtool. I was able to write, compile and build the code. After this I edit… --- ## [What factor determines input\_item size (ninput\_items)?](https://www.ruby-forum.com/t/what-factor-determines-input-item-size-ninput-items/243174)
**Author:** [@Rafa\_F](https://www.ruby-forum.com/u/Rafa_F)\ **Replies:** 2\ **Last updated:** [August 29, 2015, 3:42pm UTC](https://www.ruby-forum.com/t/what-factor-determines-input-item-size-ninput-items/243174 "2015-08-29T15:42:00Z")
I am testing my OOT module in various condition of different machines. A certain block implementing a state machine requires a certain number of items or more. Thus, I’ve stated it in forecast(): https://gist.github… --- ## [R820T2 in Gnuradio](https://www.ruby-forum.com/t/r820t2-in-gnuradio/243170)
**Author:** [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\ **Replies:** 3\ **Last updated:** [August 29, 2015, 9:14am UTC](https://www.ruby-forum.com/t/r820t2-in-gnuradio/243170 "2015-08-29T09:14:42Z")
Hello, I followed some instructions and I installed the files in Gnuradio which respect to R820T2. Now, to start and continue my research, I need some tutorial to teach me to use this device and how to make a communic… --- ## [Performnace monitor runtime usage to the whole system](https://www.ruby-forum.com/t/performnace-monitor-runtime-usage-to-the-whole-system/243151)
**Author:** [@Rafa\_F](https://www.ruby-forum.com/u/Rafa_F)\ **Replies:** 4\ **Last updated:** [August 28, 2015, 6:18pm UTC](https://www.ruby-forum.com/t/performnace-monitor-runtime-usage-to-the-whole-system/243151 "2015-08-28T18:18:37Z")
I’ve learned that sum of runtime usage values of all blocks should be and is one. But I don’t think that GNU Radio uses 100 percent (= one) of CPU capability. And I think that ‘one’ is a portion to the capability wh… --- ## [ALC662 audio card causes underruns and overruns](https://www.ruby-forum.com/t/alc662-audio-card-causes-underruns-and-overruns/243166)
**Author:** [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\ **Replies:** 4\ **Last updated:** [August 28, 2015, 3:37pm UTC](https://www.ruby-forum.com/t/alc662-audio-card-causes-underruns-and-overruns/243166 "2015-08-28T15:37:22Z")
Hi, I have a flow graph that receives, demodulates and filters a signal before sending it to the audio card. It’s been working in a single board, single core, computer with an audio card ALC888 for months. I occasio… --- ## [Sdr r820t2](https://www.ruby-forum.com/t/sdr-r820t2/243163)
**Author:** [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\ **Replies:** 1\ **Last updated:** [August 28, 2015, 10:05am UTC](https://www.ruby-forum.com/t/sdr-r820t2/243163 "2015-08-28T10:05:34Z")
Good afternoon, I bought the SDR R820T2 (you can see it on: http://www.amazon.com/NESDR-Mini-Compatible-Packages-Guaranteed/dp/B00P2UOU72) and now I have to configure my Gnuradio to use with my SDR. Do you know the s… --- ## [Re: Digital Audio Broadcast (DAB), anybody running gr-dab?](https://www.ruby-forum.com/t/re-digital-audio-broadcast-dab-anybody-running-gr-dab/243164)
**Author:** [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\ **Replies:** 0\ **Last updated:** [August 28, 2015, 8:49am UTC](https://www.ruby-forum.com/t/re-digital-audio-broadcast-dab-anybody-running-gr-dab/243164 "2015-08-28T08:49:37Z")
Hi Ruben and all, thank you for your response. I am not sure if my last response found it’s way to you and the list. Nevertheless it contained a typo error. To keep it short: I could just test it again and indeed the… --- ## [Cygwin compile of 3.7.8](https://www.ruby-forum.com/t/cygwin-compile-of-3-7-8/243123)
**Author:** [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\ **Replies:** 1\ **Last updated:** [August 28, 2015, 6:38am UTC](https://www.ruby-forum.com/t/cygwin-compile-of-3-7-8/243123 "2015-08-28T06:38:11Z")
Has anyone had any luck compiling the latest 3.7.8 on cygwin? I’m running into the following: \[ 14%\] Built target pygen\_python\_volk\_modtool\_95e3e \[ 14%\] Built target pmt\_generated \[ 15%\] Built target gnuradio-pmt … --- ## [Digital Audio Broadcast (DAB), anybody running gr-dab?](https://www.ruby-forum.com/t/digital-audio-broadcast-dab-anybody-running-gr-dab/243150)
**Author:** [@Rafa\_F](https://www.ruby-forum.com/u/Rafa_F)\ **Replies:** 3\ **Last updated:** [August 27, 2015, 11:59am UTC](https://www.ruby-forum.com/t/digital-audio-broadcast-dab-anybody-running-gr-dab/243150 "2015-08-27T11:59:23Z")
Hi all! Yesterday I tried to investigate on DAB reception. I have searched the list archive for discussions about DAB in reverse chronological order. Unfortunately It did not really help out. I stumbled across two gn… --- ## [USRP's not Communicating](https://www.ruby-forum.com/t/usrps-not-communicating/243144)
**Author:** [@Rafa\_F](https://www.ruby-forum.com/u/Rafa_F)\ **Replies:** 4\ **Last updated:** [August 26, 2015, 12:43pm UTC](https://www.ruby-forum.com/t/usrps-not-communicating/243144 "2015-08-26T12:43:48Z")
Hello, I want to transmit the data between two USRP’s and make them communicate with each other. But I guess the packets are not being received properly. I am connected the two USRP’s to the same laptop and trying it… --- ## [3.7.8 build problem 'cannot find -lcblas'](https://www.ruby-forum.com/t/3-7-8-build-problem-cannot-find-lcblas/243000)
**Author:** [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\ **Replies:** 7\ **Last updated:** [August 26, 2015, 11:04am UTC](https://www.ruby-forum.com/t/3-7-8-build-problem-cannot-find-lcblas/243000 "2015-08-26T11:04:29Z")
Trying to update our Mageia package to 3.7.8 using the release tarball, we are hitting this: \[ 70%\] Building CXX object gr-wavelet/lib/CMakeFiles/gnuradio-wavelet.dir/wvps\_ff\_impl.cc.o Linking CXX shared library libg… --- ## [Better approach for FEC](https://www.ruby-forum.com/t/better-approach-for-fec/243141)
**Author:** [@Rafa\_F](https://www.ruby-forum.com/u/Rafa_F)\ **Replies:** 0\ **Last updated:** [August 25, 2015, 8:36pm UTC](https://www.ruby-forum.com/t/better-approach-for-fec/243141 "2015-08-25T20:36:59Z")
Hi, I have a burst system in gnuradio which is working fine with usrps. I have used tags (tx\_time, tx\_eob and tx\_sob) to define packet boundaries and transmission time. Tags are inserted by a block which is connected … --- ## [Setting up a simple packet radio in 3.7.7.2](https://www.ruby-forum.com/t/setting-up-a-simple-packet-radio-in-3-7-7-2/243131)
**Author:** [@Rafa\_F](https://www.ruby-forum.com/u/Rafa_F)\ **Replies:** 5\ **Last updated:** [August 25, 2015, 4:18pm UTC](https://www.ruby-forum.com/t/setting-up-a-simple-packet-radio-in-3-7-7-2/243131 "2015-08-25T16:18:45Z")
Hello, I am trying to get a simple packet radio GRC working but so far have had no luck with the following scheme: tcp-source (port 9000) -\> packet encoder -\> gmsk mod -\> gmsk demod -\> packet decoder -\> tcp-sink (por… --- ## [Gnuradio on android](https://www.ruby-forum.com/t/gnuradio-on-android/243125)
**Author:** [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\ **Replies:** 2\ **Last updated:** [August 25, 2015, 2:55pm UTC](https://www.ruby-forum.com/t/gnuradio-on-android/243125 "2015-08-25T14:55:12Z")
Hi I’m looking for “GNURadio on android” applications. I mean what kind stuffs already can I do with GNURadio on android? I have not tried the process of making GNURadio on a mobile device since I don’t know what’s … --- ## [Executing the flow graph: window closes immediatly](https://www.ruby-forum.com/t/executing-the-flow-graph-window-closes-immediatly/243118)
**Author:** [@Rafa\_F](https://www.ruby-forum.com/u/Rafa_F)\ **Replies:** 6\ **Last updated:** [August 25, 2015, 11:41am UTC](https://www.ruby-forum.com/t/executing-the-flow-graph-window-closes-immediatly/243118 "2015-08-25T11:41:50Z")
Hello, I’m totally new to the gnu radio project and trying my first steps into the world of SDR. At this moment i ran into a problem: I followed the steps of the tutorial at http://gnuradio.org/redmine/projects/gnur… --- ## [Padding burtsy blocks](https://www.ruby-forum.com/t/padding-burtsy-blocks/243136)
**Author:** [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\ **Replies:** 1\ **Last updated:** [August 25, 2015, 8:25am UTC](https://www.ruby-forum.com/t/padding-burtsy-blocks/243136 "2015-08-25T08:25:31Z")
I have a flowgraph that I’m trying to develop in simulation first before deploying to some sort of hardware like a USRP. The flowgraph begins with a ZMQ Pull Source and then I have all my signal processing blocks af… --- ## [Capturing DMR (MOTOTRBO) data with gnuradio](https://www.ruby-forum.com/t/capturing-dmr-mototrbo-data-with-gnuradio/243137)
**Author:** [@Rafa\_F](https://www.ruby-forum.com/u/Rafa_F)\ **Replies:** 0\ **Last updated:** [August 25, 2015, 8:15am UTC](https://www.ruby-forum.com/t/capturing-dmr-mototrbo-data-with-gnuradio/243137 "2015-08-25T08:15:35Z")
Hello there, I am trying to capture DMR/MOTOTRBO data packets (not voice) with gnuradio. I have found gr-dsd block that successfully decodes the signal in question. Only problem is that gr-dsd does not “unpack” the … --- ## [Flags / xml to supress Add throttle warning?](https://www.ruby-forum.com/t/flags-xml-to-supress-add-throttle-warning/243138)
**Author:** [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\ **Replies:** 2\ **Last updated:** [August 25, 2015, 6:18am UTC](https://www.ruby-forum.com/t/flags-xml-to-supress-add-throttle-warning/243138 "2015-08-25T06:18:45Z")
I’ve built an OOT for some physical SDR hardware. However, when compiling a flowgraph in gnruradio-companion it prints a warning message about no audio or rf sink, so please insert a throttle. Since my module actuall… [Previous page](https://www.ruby-forum.com/c/gnu-radio/15.md?page=7) [Next page](https://www.ruby-forum.com/c/gnu-radio/15.md?page=9)