# GNU Radio **URL:** https://www.ruby-forum.com/c/gnu-radio/15.md?page=66 [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:** 67 --- ## [Phase measurement with Ettus Research N210](https://www.ruby-forum.com/t/phase-measurement-with-ettus-research-n210/230426)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 11\ **Last updated:** [June 18, 2014, 10:40am UTC](https://www.ruby-forum.com/t/phase-measurement-with-ettus-research-n210/230426 "2014-06-18T10:40:22Z")
Hello, I’m using an Ettus R. N210 with a LFRX daughter-board to do data measure the phase of a signals referred to a 10 MHz clock. To start I want to characterize the phase noise of the device, therefore I send to bo… --- ## [Making a GUI to execute python scripts generated by GRC](https://www.ruby-forum.com/t/making-a-gui-to-execute-python-scripts-generated-by-grc/230436)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 0\ **Last updated:** [June 18, 2014, 7:24am UTC](https://www.ruby-forum.com/t/making-a-gui-to-execute-python-scripts-generated-by-grc/230436 "2014-06-18T07:24:57Z")
Hi, I have written a python code(wxgui.py) for a simple GUI using wxPython.There is a button in it and by pressing that button i am executing another python file.It’s working fine and i am able to call any python fil… --- ## [Using set\_min\_output\_buffer() in Python block](https://www.ruby-forum.com/t/using-set-min-output-buffer-in-python-block/230367)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 6\ **Last updated:** [June 18, 2014, 6:55am UTC](https://www.ruby-forum.com/t/using-set-min-output-buffer-in-python-block/230367 "2014-06-18T06:55:51Z")
Dear All, Is it possible to use set\_min\_output\_buffer() in Python? I want to be able to output more than 4096 items from a Python block during one call to the work function. Is there a way to do this? Regards, David … --- ## [UHD USRPN210 Complex int16](https://www.ruby-forum.com/t/uhd-usrpn210-complex-int16/230433)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 0\ **Last updated:** [June 18, 2014, 2:14am UTC](https://www.ruby-forum.com/t/uhd-usrpn210-complex-int16/230433 "2014-06-18T02:14:47Z")
Hello, Very basic question. I have a flowgraph with a sine source and UHD USRPN210 sink in gnuradio-companion. I want to explore the complete range of output transmit (max to min) powers of WBX radio board. Maximum i… --- ## [Measuring phase between channels](https://www.ruby-forum.com/t/measuring-phase-between-channels/230425)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 3\ **Last updated:** [June 18, 2014, 1:48am UTC](https://www.ruby-forum.com/t/measuring-phase-between-channels/230425 "2014-06-18T01:48:51Z")
Hello, I want to measure the phase difference between three synchronised USRP channels (Common Ref & PPS), does software exist to do this, and to what accuracy, please? Sorry, this is a bit of a newbie question, and … --- ## [wxPython 3.0 breaks wxGUI](https://www.ruby-forum.com/t/wxpython-3-0-breaks-wxgui/230358)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 5\ **Last updated:** [June 17, 2014, 6:18pm UTC](https://www.ruby-forum.com/t/wxpython-3-0-breaks-wxgui/230358 "2014-06-17T18:18:04Z")
(Apologies if this is posted twice, I subscribed as it didn’t seem to be show up on the archives.) Hey there, Arch Linux uses wxPython 3.0 which throws assertions that I haven’t had the patience to track down, to do … --- ## [Updated NBFM Recorder](https://www.ruby-forum.com/t/updated-nbfm-recorder/230384)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 3\ **Last updated:** [June 17, 2014, 6:12pm UTC](https://www.ruby-forum.com/t/updated-nbfm-recorder/230384 "2014-06-17T18:12:43Z")
Hi all, I updated my multi-channel, narrow-band FM recorder, tested with B200 and N210, and put it on GitHub. Features: Parallel demodulation and recording of NBFM radio channels Up to N channels limited by CPU an… --- ## [USRP queue ambiguity](https://www.ruby-forum.com/t/usrp-queue-ambiguity/230424)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 0\ **Last updated:** [June 17, 2014, 5:54pm UTC](https://www.ruby-forum.com/t/usrp-queue-ambiguity/230424 "2014-06-17T17:54:39Z")
Hello, I am writing a code for frequency hopping. I am facing a problem when I change the transmitting frequency. The problem is not in the duration of the LO settling time as I expected. However, it is in the packets … --- ## [\[GSoC\] Co-Processors Update #3](https://www.ruby-forum.com/t/gsoc-co-processors-update-3/230414)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 1\ **Last updated:** [June 17, 2014, 5:47pm UTC](https://www.ruby-forum.com/t/gsoc-co-processors-update-3/230414 "2014-06-17T17:47:11Z")
Hello all, Logistical: 1/3 of the summer is gone! Midterm evaluations are due at the end of next week (June 27). They are short so shouldn’t affect progress at all. Coproc dev call next week to get more ideas on GNU… --- ## [UHD Driver Not Working](https://www.ruby-forum.com/t/uhd-driver-not-working/230404)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 3\ **Last updated:** [June 17, 2014, 5:43pm UTC](https://www.ruby-forum.com/t/uhd-driver-not-working/230404 "2014-06-17T17:43:01Z")
An attempt to use PyBOMBS to install GNU Radio resulted in no errors. However, the UHD driver must have installed incorrectly, because the source and sink blocks are not working. Is there any way to fix this problem? … --- ## [Basic question about GNU gmsk demodulation](https://www.ruby-forum.com/t/basic-question-about-gnu-gmsk-demodulation/230423)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 0\ **Last updated:** [June 17, 2014, 4:59pm UTC](https://www.ruby-forum.com/t/basic-question-about-gnu-gmsk-demodulation/230423 "2014-06-17T16:59:10Z")
Hello everyone, I am working on signal demodulation. I have to demodulate a 9600 bps 12kHz wide GMSK modulated signal. I wonder when I use “GMSK demod”.What should I enter for the “samples/symbol”. Should that be “my … --- ## [GNU Radio / Software Radio conceptual question](https://www.ruby-forum.com/t/gnu-radio-software-radio-conceptual-question/230409)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 5\ **Last updated:** [June 17, 2014, 1:53pm UTC](https://www.ruby-forum.com/t/gnu-radio-software-radio-conceptual-question/230409 "2014-06-17T13:53:32Z")
Hi all, I have a relatively high level question regarding gnuradio and software radio in general. Is it a fair generalization to say that gnuradio is operating at the application layer and is essentially emulating a … --- ## [\[GSoC\] gr-radar: Echotimer (USRP interface) and FSK Radar Demonstration](https://www.ruby-forum.com/t/gsoc-gr-radar-echotimer-usrp-interface-and-fsk-radar-demonstration/230418)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 0\ **Last updated:** [June 17, 2014, 1:01pm UTC](https://www.ruby-forum.com/t/gsoc-gr-radar-echotimer-usrp-interface-and-fsk-radar-demonstration/230418 "2014-06-17T13:01:15Z")
Hi! The GNU Radio Radar Toolbox has some nice new features! First the USRP interface for synchronized TX/RX streams is finished. It ensures that any waveform given by a tagged stream is received with only a constant … --- ## [Getting overflows at 50 Msps (not sure why)](https://www.ruby-forum.com/t/getting-overflows-at-50-msps-not-sure-why/230214)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 6\ **Last updated:** [June 16, 2014, 10:30pm UTC](https://www.ruby-forum.com/t/getting-overflows-at-50-msps-not-sure-why/230214 "2014-06-16T22:30:20Z")
Hello, I am trying to get samples from a B200 at 50 Msps into GNU Radio. The UHD benchmark\_rate tool receives at 50 Msps without any overflows detected. My GNU Radio flowgraph is simply a USRP source connected to a n… --- ## [Phase unwrapping](https://www.ruby-forum.com/t/phase-unwrapping/230400)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 5\ **Last updated:** [June 16, 2014, 8:11pm UTC](https://www.ruby-forum.com/t/phase-unwrapping/230400 "2014-06-16T20:11:33Z")
Hello, I just started to work with GNU radio for my very basic needs, so please excuse my naive questions and probably my inappropriate use of the jargon. My first trivial application of GNU radio is to simply measur… --- ## [Coverity scan](https://www.ruby-forum.com/t/coverity-scan/230401)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 0\ **Last updated:** [June 16, 2014, 2:49pm UTC](https://www.ruby-forum.com/t/coverity-scan/230401 "2014-06-16T14:49:55Z")
Hey everyone, A new Coverity scan of our code came back this morning. There is one new issue that falls on Marcus Mueller for his updates to pmt\_io.cc, so I’ll leave it to him to fix :slight\_smile: Sorry to throw yo… --- ## [GNU RAdio Companion CPU overflow](https://www.ruby-forum.com/t/gnu-radio-companion-cpu-overflow/230397)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 0\ **Last updated:** [June 16, 2014, 12:43pm UTC](https://www.ruby-forum.com/t/gnu-radio-companion-cpu-overflow/230397 "2014-06-16T12:43:44Z")
Hi, I’m a beginner using GNU Radio Companion. I have a simple flow graph consisting in a vector source, a PSK Mod, a throttle and USRP sink. The problem is that I’m transmiting a lot of noise because when I run the … --- ## [Gnuradio schedular](https://www.ruby-forum.com/t/gnuradio-schedular/230375)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 2\ **Last updated:** [June 16, 2014, 11:37am UTC](https://www.ruby-forum.com/t/gnuradio-schedular/230375 "2014-06-16T11:37:38Z")
Dear sir I experienced that after every 8191 samples variables of blocks becomes 0. What is this 8191 limit?. I showed in gr\_scheduler\_overwive.pdf, N=2048. Is 2048 number of samples? I noticed that 2048\*4=8129. Ple… --- ## [\[coproc\] Scheduling a Co-Processors Working Group meeting](https://www.ruby-forum.com/t/coproc-scheduling-a-co-processors-working-group-meeting/230390)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 0\ **Last updated:** [June 15, 2014, 10:20pm UTC](https://www.ruby-forum.com/t/coproc-scheduling-a-co-processors-working-group-meeting/230390 "2014-06-15T22:20:38Z")
Greetings all, I’ve recently agreed to take on the role of the Co-Processor Working Group Chair. I know lots of people have projects either directly related to, or touching on this topic: the variety of things peopl… --- ## [GSoC participant ; Introduction, progress, plan etc](https://www.ruby-forum.com/t/gsoc-participant-introduction-progress-plan-etc/240721)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 4\ **Last updated:** [June 15, 2014, 5:12pm UTC](https://www.ruby-forum.com/t/gsoc-participant-introduction-progress-plan-etc/240721 "2014-06-15T17:12:51Z")
Hi everyone, I have been selected for GSoC 2014 under GNU Radio. I will be working on VOLK over the summer - my project proposal and GSoC page are as follows : 1. 2. https://www.google-melange.com/gsoc/project/det… --- ## [Scanoo\_rx: New GUI, Center Freq Hopping & SSB Modulation](https://www.ruby-forum.com/t/scanoo-rx-new-gui-center-freq-hopping-ssb-modulation/230299)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 3\ **Last updated:** [June 15, 2014, 2:07am UTC](https://www.ruby-forum.com/t/scanoo-rx-new-gui-center-freq-hopping-ssb-modulation/230299 "2014-06-15T02:07:28Z")
Hi all, The latest version of my scanoo\_rx GRC SDR scanning application is now available via GitHub. Please star the project if you like it and report bugs by creating an issue on the GitHub page. Quick overview of … --- ## [Issues with syncing two USRPs!](https://www.ruby-forum.com/t/issues-with-syncing-two-usrps/230327)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 5\ **Last updated:** [June 15, 2014, 12:04am UTC](https://www.ruby-forum.com/t/issues-with-syncing-two-usrps/230327 "2014-06-15T00:04:09Z")
Hi, I am a new user of USRP/GNU Radio. I am experimenting with a system comprised of one transmitter and multiple receivers. For now, I have two USRP N200. On the first USRP, I got one LFTX and one LFRX daughter boa… --- ## [Re: Issues with syncing two USRPs! (Discuss-gnuradio Digest, Vol 139, Issue 12)](https://www.ruby-forum.com/t/re-issues-with-syncing-two-usrps-discuss-gnuradio-digest-vol-139-issue-12/230374)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 0\ **Last updated:** [June 14, 2014, 2:21am UTC](https://www.ruby-forum.com/t/re-issues-with-syncing-two-usrps-discuss-gnuradio-digest-vol-139-issue-12/230374 "2014-06-14T02:21:17Z")
Hi Martin, This is a follow up on my earlier email. I am still having issues with getting two N200’s to work together. First, please find a short answer to your questions. Out of curiousity, do you have a MIMO cabl… --- ## [Cmake and Fedora 20](https://www.ruby-forum.com/t/cmake-and-fedora-20/230370)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 4\ **Last updated:** [June 13, 2014, 11:57pm UTC](https://www.ruby-forum.com/t/cmake-and-fedora-20/230370 "2014-06-13T23:57:01Z")
Hello All, I’m working on the Out-of-Tree Module tutorial to ensure that my install of GNU Radio (3.7.3) on Fedora 20 (64bit) is working properly (as I am more accustomed to working on Ubuntu). Alas, when I run CMake … --- ## [Pfb\_arb\_resampler test fail (3.7.3)](https://www.ruby-forum.com/t/pfb-arb-resampler-test-fail-3-7-3/229991)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 2\ **Last updated:** [June 13, 2014, 6:32pm UTC](https://www.ruby-forum.com/t/pfb-arb-resampler-test-fail-3-7-3/229991 "2014-06-13T18:32:01Z")
Hi all guys, I am experiencing error when testing 3.7.3. The error report is following: OK Using Volk machine: avx\_64\_mmx – Process completed Passed 95/177 Testing qa\_pfb\_arb\_resampler Test command: /bin/sh /hom… --- ## [Ubuntu 14.04 audio sink problems](https://www.ruby-forum.com/t/ubuntu-14-04-audio-sink-problems/230365)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 0\ **Last updated:** [June 13, 2014, 10:52am UTC](https://www.ruby-forum.com/t/ubuntu-14-04-audio-sink-problems/230365 "2014-06-13T10:52:19Z")
Hi all, After about the 10th time trying to install gnuradio on Ubuntu 14.04 i finally managed to get it working with some oot blocks. Only problem now is the audio sink doesn’t produce a clean output say at 1 khz i… --- ## [Getting noise for FM receiver with usrp e110?](https://www.ruby-forum.com/t/getting-noise-for-fm-receiver-with-usrp-e110/230348)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 4\ **Last updated:** [June 12, 2014, 5:53pm UTC](https://www.ruby-forum.com/t/getting-noise-for-fm-receiver-with-usrp-e110/230348 "2014-06-12T17:53:16Z")
Hi everybody, I’m trying to implement FM receiver on usrp e110. The daugtherboard used is SBX Board Rev 5.1. As a result, I got only noise, I wasn’t able to hear the local station at 103.5 Mhz. And I got this erro… --- ## [Question about "packed 1 bit per byte(LSB)"](https://www.ruby-forum.com/t/question-about-packed-1-bit-per-byte-lsb/230354)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 0\ **Last updated:** [June 12, 2014, 5:19pm UTC](https://www.ruby-forum.com/t/question-about-packed-1-bit-per-byte-lsb/230354 "2014-06-12T17:19:15Z")
Hello everyone! I used a GMSK Demod and realized that it only output the “packed 1 bit per byte(LSB)”. I was wondering how to unpack that one to a normal binary file? Thanks in advance :slight\_smile: Cindy --- ## [Help with wx-gui, window size error](https://www.ruby-forum.com/t/help-with-wx-gui-window-size-error/230247)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 10\ **Last updated:** [June 12, 2014, 1:34pm UTC](https://www.ruby-forum.com/t/help-with-wx-gui-window-size-error/230247 "2014-06-12T13:34:27Z")
Hi, I am having problems running a WX GUI FFT Sink, I am getting the following runtime error: Traceback (most recent call last): File “/home/thilina/noctar/fm\_rx/top\_block.py”, line 109, in tb = top\_block() File … --- ## [Installing Gen2 to Live SDR environment](https://www.ruby-forum.com/t/installing-gen2-to-live-sdr-environment/230340)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 1\ **Last updated:** [June 12, 2014, 1:19pm UTC](https://www.ruby-forum.com/t/installing-gen2-to-live-sdr-environment/230340 "2014-06-12T13:19:38Z")
Hi, I have installed GNURadio 3.7.3 Live SDR Environment to my usb flash drive using LiLi (LinuxLive USB Creator) and made it secure for different boots. Now I am trying to install Gen2 created by Michael Buettner, … [Previous page](https://www.ruby-forum.com/c/gnu-radio/15.md?page=65) [Next page](https://www.ruby-forum.com/c/gnu-radio/15.md?page=67)