# GNU Radio **URL:** https://www.ruby-forum.com/c/gnu-radio/15.md?page=31 [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:** 32 --- ## [Which block is causing dropped samples?](https://www.ruby-forum.com/t/which-block-is-causing-dropped-samples/234621)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 3\ **Last updated:** [March 18, 2015, 6:13pm UTC](https://www.ruby-forum.com/t/which-block-is-causing-dropped-samples/234621 "2015-03-18T18:13:53Z")
Hi all, I just finished writing a flowgraph with a few custom C++ blocks, but when I connect it to a USRP N210 at about 25MS/s it’s not too hard to find a combo of parameters that will cause a sea of DDDDDDDDDDs to co… --- ## [Bugs gr-ldpc module‏](https://www.ruby-forum.com/t/bugs-gr-ldpc-module/234632)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [March 18, 2015, 5:32pm UTC](https://www.ruby-forum.com/t/bugs-gr-ldpc-module/234632 "2015-03-18T17:32:37Z")
Hello, Well, I installed the gr-ldpc module using pybombs in Gnuradio v3.7.6.1, and it no error occurred during the installation. I opened the Gnuradio and searched the module in the module list, and it was there, but… --- ## [QT widget to adjust integer values on the fly](https://www.ruby-forum.com/t/qt-widget-to-adjust-integer-values-on-the-fly/234631)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 2\ **Last updated:** [March 18, 2015, 5:19pm UTC](https://www.ruby-forum.com/t/qt-widget-to-adjust-integer-values-on-the-fly/234631 "2015-03-18T17:19:01Z")
I have a GRC flowgraph that includes a custom C++ block which dumps custom vectors out a port, so I use the QT GUI Vector Sink to display these. The block also requires integer params which I need to adjust while the… --- ## [Run-time error while executing a simple flowgraph in GNU Radio companion](https://www.ruby-forum.com/t/run-time-error-while-executing-a-simple-flowgraph-in-gnu-radio-companion/234625)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 13\ **Last updated:** [March 18, 2015, 4:58pm UTC](https://www.ruby-forum.com/t/run-time-error-while-executing-a-simple-flowgraph-in-gnu-radio-companion/234625 "2015-03-18T16:58:20Z")
Hey all, Just to start experimenting with GNU Radio and companion I just created a simple flowgraph consisting of a Signal Source Block and a WX GUI FFT Sink connected to it, to see if the diagram will be generated. I… --- ## [Problem in creating an OOT module](https://www.ruby-forum.com/t/problem-in-creating-an-oot-module/234622)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 2\ **Last updated:** [March 18, 2015, 1:37am UTC](https://www.ruby-forum.com/t/problem-in-creating-an-oot-module/234622 "2015-03-18T01:37:50Z")
Hello everyone, I was wondering if anyone can help me with a small issue. I want to use the tagged\_file\_sink block in gnuradio companion, but with a couple of additional features suitable for my application needs. So… --- ## [Problems to create a new OOT module using gr\_modtool in a pybombs instalation of Gnuradio](https://www.ruby-forum.com/t/problems-to-create-a-new-oot-module-using-gr-modtool-in-a-pybombs-instalation-of-gnuradio/234618)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 1\ **Last updated:** [March 17, 2015, 10:04pm UTC](https://www.ruby-forum.com/t/problems-to-create-a-new-oot-module-using-gr-modtool-in-a-pybombs-instalation-of-gnuradio/234618 "2015-03-17T22:04:48Z")
Hello, I tried to create a module in the Gnuradio v3.7.6.1 installed by pybombs using gr\_modtool. But the module didn’t appear in the gnuradio module list. I verified if something it was wrong during the creation of … --- ## [Cannot find gnuradio companion](https://www.ruby-forum.com/t/cannot-find-gnuradio-companion/234612)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 2\ **Last updated:** [March 17, 2015, 6:56pm UTC](https://www.ruby-forum.com/t/cannot-find-gnuradio-companion/234612 "2015-03-17T18:56:56Z")
Hello ALL, I encountered one problem during installing GNU Radio on ubuntu 14.04 . I attached the whole installation log . Could someone help me with this? Thanks in advance. I used the script from the link below … --- ## [(no subject)](https://www.ruby-forum.com/t/no-subject/234603)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 1\ **Last updated:** [March 17, 2015, 3:23pm UTC](https://www.ruby-forum.com/t/no-subject/234603 "2015-03-17T15:23:41Z")
Hi all, I’m trying to get the constellation of 16QAM. How to use constellation receiver block for 16QAM? thanks in advance --- ## [Relative Path to File with File Sink/Source](https://www.ruby-forum.com/t/relative-path-to-file-with-file-sink-source/234597)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 5\ **Last updated:** [March 16, 2015, 7:44pm UTC](https://www.ruby-forum.com/t/relative-path-to-file-with-file-sink-source/234597 "2015-03-16T19:44:38Z")
Easy question here. I’m trying to use a relative path with file sink/source. It errors out with “can’t open file”. I’m assuming the path is relative to the location of the .grc file location. If the location of the .… --- ## [Python message passing block hangs (test file included)](https://www.ruby-forum.com/t/python-message-passing-block-hangs-test-file-included/234545)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 2\ **Last updated:** [March 16, 2015, 6:10pm UTC](https://www.ruby-forum.com/t/python-message-passing-block-hangs-test-file-included/234545 "2015-03-16T18:10:25Z")
Hi all, I’m struggling to understand an issue I’m having with a simple python block with a registered message port connected to the copy block. The python block looks like this: it literally does nothing, it just hap… --- ## [Fwd: \[SOCIS 2015\] Second batch of projects](https://www.ruby-forum.com/t/fwd-socis-2015-second-batch-of-projects/234592)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [March 16, 2015, 5:09pm UTC](https://www.ruby-forum.com/t/fwd-socis-2015-second-batch-of-projects/234592 "2015-03-16T17:09:02Z")
From the SOCIS mentors mailing list. Students interested in participating in the summer of code please read this: -------- Forwarded Message -------- Subject: \[SOCIS 2015\] Second batch of projects Date: Mon, 16 M… --- ## [Cmake error: cant find gnuradio\_runtime\_libraries](https://www.ruby-forum.com/t/cmake-error-cant-find-gnuradio-runtime-libraries/234576)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 11\ **Last updated:** [March 16, 2015, 3:53pm UTC](https://www.ruby-forum.com/t/cmake-error-cant-find-gnuradio-runtime-libraries/234576 "2015-03-16T15:53:32Z")
Hey Marcus, I am trying to build my own custom block in gnuradio, with the help of following link “http://gnuradio.org/redmine/projects/gnuradio/wiki/OutOfTreeModules and https://gnuradio.org/redmine/projects/gnuradi… --- ## [ERROR:.higher verbosity \[gr-osmosdr\]](https://www.ruby-forum.com/t/error-higher-verbosity-gr-osmosdr/234585)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [March 16, 2015, 11:42am UTC](https://www.ruby-forum.com/t/error-higher-verbosity-gr-osmosdr/234585 "2015-03-16T11:42:51Z")
Hi all, I got problem during my gnuradio installation (via Pybombs),. Installing from source: gr-osmosdr PyBombs.sysutils - INFO - monitor: Tried command 0 time(s) remote: Counting objects: 3639, done. remote: Compr… --- ## [(no subject)](https://www.ruby-forum.com/t/no-subject/234584)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [March 16, 2015, 7:45am UTC](https://www.ruby-forum.com/t/no-subject/234584 "2015-03-16T07:45:19Z")
Hi… the existed costas loop only considers the phase of the received signal (for PSK techniques). But for QAM we have to consider both the magnitude and phase of the received signal. I want to use the same costas loo… --- ## [Errors while running CTest \[VOLK.\]](https://www.ruby-forum.com/t/errors-while-running-ctest-volk/234559)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 3\ **Last updated:** [March 16, 2015, 6:15am UTC](https://www.ruby-forum.com/t/errors-while-running-ctest-volk/234559 "2015-03-16T06:15:44Z")
Hi, I just tried to install gnuradio (ref: GNU Radio Manual and C++ API Reference: Build Instructions and Information) until : make test the result is : … 98% tests passed, 3 tests failed out of 193 Total Test ti… --- ## [Vector Source variable from file](https://www.ruby-forum.com/t/vector-source-variable-from-file/234581)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 5\ **Last updated:** [March 15, 2015, 11:39pm UTC](https://www.ruby-forum.com/t/vector-source-variable-from-file/234581 "2015-03-15T23:39:17Z")
Hi all, I have a vector source that repeats and points to two variables A + B , within variable A is 1100 is it possible to have variable B point to a file that contains a whole bunch of binary combinations separated… --- ## [Majority of WX GUI Widgets missing from Companion](https://www.ruby-forum.com/t/majority-of-wx-gui-widgets-missing-from-companion/234573)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 13\ **Last updated:** [March 15, 2015, 10:46pm UTC](https://www.ruby-forum.com/t/majority-of-wx-gui-widgets-missing-from-companion/234573 "2015-03-15T22:46:16Z")
Hi everyone, I downloaded and built GNU Radio from sbrac.org, and it operates normally. The only problem is that when I am searching for any WX GUI Widgets, I can only see WX GUI Static Text, WX GUI Time Panel and WX … --- ## [Dvsi usb-3000 p25](https://www.ruby-forum.com/t/dvsi-usb-3000-p25/222449)
**Author:** [@aris](https://www.ruby-forum.com/u/aris)\ **Replies:** 2\ **Last updated:** [March 15, 2015, 9:08pm UTC](https://www.ruby-forum.com/t/dvsi-usb-3000-p25/222449 "2015-03-15T21:08:51Z")
Hello, This looked interesting since the voice codec will do P25, DMR, and D\*. So I bought one and should have it in a couple of days. http://www.dvsinc.com/products/usb\_3k.htm 73 Eric --- ## [Reading info from pmt\_blob](https://www.ruby-forum.com/t/reading-info-from-pmt-blob/234580)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 1\ **Last updated:** [March 15, 2015, 8:29am UTC](https://www.ruby-forum.com/t/reading-info-from-pmt-blob/234580 "2015-03-15T08:29:37Z")
Hello all, I’m new in GNURadio and right now I am understanding a little bit on how the pmt work and how can it be read. For that I’m taking this project as a base: GitHub - bastibl/gr-ieee802-15-4: IEEE 802.15.4 Zig… --- ## [First project: Garmin Rino GPS/FRS/GMRS?](https://www.ruby-forum.com/t/first-project-garmin-rino-gps-frs-gmrs/234569)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 1\ **Last updated:** [March 14, 2015, 2:29am UTC](https://www.ruby-forum.com/t/first-project-garmin-rino-gps-frs-gmrs/234569 "2015-03-14T02:29:00Z")
Hello, I’m very new to GNURadio and to RF exploration/hacking in general. I’ve downloaded GNURadio on my Linux system and have been successful in installing a couple of systems. I got the RTL-SDR USB receiver working, … --- ## [Controlling File Sink](https://www.ruby-forum.com/t/controlling-file-sink/234544)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 4\ **Last updated:** [March 13, 2015, 11:38pm UTC](https://www.ruby-forum.com/t/controlling-file-sink/234544 "2015-03-13T23:38:42Z")
Hello all, In GRC, I’ve set up a packet detector that is working using the Header Payload Demux block. Unexpectedly, however, it seems the payload output port does not go silent when no header is detected. It outputs … --- ## [Installing gr-ettus](https://www.ruby-forum.com/t/installing-gr-ettus/234564)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 6\ **Last updated:** [March 13, 2015, 11:06pm UTC](https://www.ruby-forum.com/t/installing-gr-ettus/234564 "2015-03-13T23:06:53Z")
Hi, I’m trying to install gr-ettus on an E310. I previously installed a new version of UHD (to support RFNoC) in the directory /opt/uhd I would like to install gr-ettus into the existing version of gnuradio that is… --- ## [Can you spot the error in the python basic block?](https://www.ruby-forum.com/t/can-you-spot-the-error-in-the-python-basic-block/234565)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 1\ **Last updated:** [March 13, 2015, 9:07pm UTC](https://www.ruby-forum.com/t/can-you-spot-the-error-in-the-python-basic-block/234565 "2015-03-13T21:07:43Z")
Yesterday I asked a question about a failing flowgraph when connecting the copy block to a message source and running the flowgraph multiple times. I’m still trying to understand what’s going on, so I decided to write… --- ## [News about upcoming release](https://www.ruby-forum.com/t/news-about-upcoming-release/234567)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [March 13, 2015, 8:00pm UTC](https://www.ruby-forum.com/t/news-about-upcoming-release/234567 "2015-03-13T20:00:08Z")
Please see the following news item regarding our release plans for version 3.7.7: http://gnuradio.org/redmine/news/48 Thanks, Tom --- ## [Setting up GNU Radio](https://www.ruby-forum.com/t/setting-up-gnu-radio/234547)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 7\ **Last updated:** [March 13, 2015, 6:51pm UTC](https://www.ruby-forum.com/t/setting-up-gnu-radio/234547 "2015-03-13T18:51:10Z")
Hi all, I’m setting up a new shared laptop with multiple users who want to use GNU Radio. I’m not sure how to set this up correctly. Should I do it this way: cd /usr/local/bin git clone GitHub - gnuradio/pybomb… --- ## [Burst Transmissions](https://www.ruby-forum.com/t/burst-transmissions/234562)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 2\ **Last updated:** [March 13, 2015, 6:32pm UTC](https://www.ruby-forum.com/t/burst-transmissions/234562 "2015-03-13T18:32:38Z")
Hi all, This is kind of a reword of a previous question I asked yesterday. I don’t think I did a good job. I am receiving data bursts that can be separated by no transmissions (noise) for extended periods of time. I… --- ## [Using virtual member functions](https://www.ruby-forum.com/t/using-virtual-member-functions/234555)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 1\ **Last updated:** [March 13, 2015, 6:31pm UTC](https://www.ruby-forum.com/t/using-virtual-member-functions/234555 "2015-03-13T18:31:47Z")
Hello all, I’m about to use member functions of the abstract base class of qtgui classes to adjust visualization parameters such as “set\_title”, “set\_line\_label” etc. There is an explanation of virtual based classes… --- ## [Using USRP and Osmo sources](https://www.ruby-forum.com/t/using-usrp-and-osmo-sources/234560)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 2\ **Last updated:** [March 13, 2015, 4:20pm UTC](https://www.ruby-forum.com/t/using-usrp-and-osmo-sources/234560 "2015-03-13T16:20:16Z")
Has anyone used a USRP and Osmosdr source together on the same graph? I am trying. To run a HackRF and an Ettus b200 together and I am getting a lot of 'D’s. I have tried putting both at a low sampling rate but it doe… --- ## [Instructions for 2x2 mimo with USRP N210](https://www.ruby-forum.com/t/instructions-for-2x2-mimo-with-usrp-n210/234556)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 1\ **Last updated:** [March 13, 2015, 4:09pm UTC](https://www.ruby-forum.com/t/instructions-for-2x2-mimo-with-usrp-n210/234556 "2015-03-13T16:09:19Z")
Discuss-gnuradio mailing list removed\_email\_address@domain.invalid https://lists.gnu.org/mailman/listinfo/discuss-gnuradio --- ## [(no subject)](https://www.ruby-forum.com/t/no-subject/234534)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 1\ **Last updated:** [March 12, 2015, 9:43am UTC](https://www.ruby-forum.com/t/no-subject/234534 "2015-03-12T09:43:18Z")
sir, can we achieve 16 qam demodulation constellation without using costas loop? if possible please send me the flow graph. thank you [Previous page](https://www.ruby-forum.com/c/gnu-radio/15.md?page=30) [Next page](https://www.ruby-forum.com/c/gnu-radio/15.md?page=32)