# GNU Radio **URL:** https://www.ruby-forum.com/c/gnu-radio/15.md?page=73 [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:** 74 --- ## [Mytx.cpp](https://www.ruby-forum.com/t/mytx-cpp/241098)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 11\ **Last updated:** [May 13, 2014, 8:03pm UTC](https://www.ruby-forum.com/t/mytx-cpp/241098 "2014-05-13T20:03:14Z")
Hello all I write a c++ document mytx.cpp and i place it into the uhd/host/build/examples.And then what should i do to let it run?Should i type the “make” command in the shell or do other things?Thank you. Best regar… --- ## [Recommended gr-ais repo/branch/commit for GnuRadio 3.7.x (latest git) and UHD 3.7.1?](https://www.ruby-forum.com/t/recommended-gr-ais-repo-branch-commit-for-gnuradio-3-7-x-latest-git-and-uhd-3-7-1/240692)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 4\ **Last updated:** [May 13, 2014, 5:44pm UTC](https://www.ruby-forum.com/t/recommended-gr-ais-repo-branch-commit-for-gnuradio-3-7-x-latest-git-and-uhd-3-7-1/240692 "2014-05-13T17:44:12Z")
Hi. What is the recommended gr-ais repo/branch/commit that yields a working gr-ais with GnuRadio 3.7.x (git commit 3831dd37c8df19e25fa258db4d393ee068889dae) and the Ettus UHD 3.7.1 GitHub shows this fork network: R… --- ## [Equalization class help](https://www.ruby-forum.com/t/equalization-class-help/241075)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 3\ **Last updated:** [May 13, 2014, 3:18pm UTC](https://www.ruby-forum.com/t/equalization-class-help/241075 "2014-05-13T15:18:48Z")
I want to work on equalization for ISI removal due to multipaths for burst frequency shift keying system. I found equalizer class in gnruadio, I want to know if somebody used cma\_equalizer for the task with success o… --- ## [Re: Merge multiple complex streams\]](https://www.ruby-forum.com/t/re-merge-multiple-complex-streams/241118)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 0\ **Last updated:** [May 13, 2014, 1:16pm UTC](https://www.ruby-forum.com/t/re-merge-multiple-complex-streams/241118 "2014-05-13T13:16:58Z")
Thanks a lot, it really got me going! This is part of my learning process, if it’s leading to nothing at all; that’s okay. Somewhere I red about feeding multiple dongles from a single signal source, interesting… A p… --- ## [Sample rate in GRC](https://www.ruby-forum.com/t/sample-rate-in-grc/241103)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 1\ **Last updated:** [May 13, 2014, 11:13am UTC](https://www.ruby-forum.com/t/sample-rate-in-grc/241103 "2014-05-13T11:13:16Z")
I am confused about the sample rate in GRC…if i am RXing a signal by USRP B210 at 2.4 GHz then the sample rate should be 4.8GHz??But USRP B210 uses a direct conversion RX and shifts the signal to 0Hz,so what should b… --- ## [Gr\_modtool enable](https://www.ruby-forum.com/t/gr-modtool-enable/241097)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 2\ **Last updated:** [May 13, 2014, 10:59am UTC](https://www.ruby-forum.com/t/gr-modtool-enable/241097 "2014-05-13T10:59:06Z")
Gurus, We have “gr\_modtool disable ABC” to disable the ABC custom block. But how to enable it back? (There is no “gr\_modtool enable” or equivalent). --- ## [Time delaying a signal](https://www.ruby-forum.com/t/time-delaying-a-signal/241085)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 10\ **Last updated:** [May 13, 2014, 10:09am UTC](https://www.ruby-forum.com/t/time-delaying-a-signal/241085 "2014-05-13T10:09:50Z")
I want to introduce a time delay in a signal received through USRP…I have used the ‘Delay’ block but it is not showing any delay…what is the appropriate block to use?? Can i delay the phase instead? Are time and phase… --- ## [How to set multiple tabs in GRC](https://www.ruby-forum.com/t/how-to-set-multiple-tabs-in-grc/241040)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 2\ **Last updated:** [May 13, 2014, 8:38am UTC](https://www.ruby-forum.com/t/how-to-set-multiple-tabs-in-grc/241040 "2014-05-13T08:38:49Z")
I want to ask that how to set multiple tabs in GRC for FFT,waterfall,scope sink plots etc when a GRC flow graph is executed so that i can switch between tabs to see various plots?? --- ## [Re: CGRAN down, working on it](https://www.ruby-forum.com/t/re-cgran-down-working-on-it/241080)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 0\ **Last updated:** [May 12, 2014, 6:50pm UTC](https://www.ruby-forum.com/t/re-cgran-down-working-on-it/241080 "2014-05-12T18:50:12Z")
George, site still down? Do you need any help from us to recover? Greetings Something must have been upgraded on the machine, and a significant number of the dependencies needed to run Trac have disappeared. For e… --- ## [Make Errors with Out of Tree Block](https://www.ruby-forum.com/t/make-errors-with-out-of-tree-block/241036)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 2\ **Last updated:** [May 12, 2014, 5:26pm UTC](https://www.ruby-forum.com/t/make-errors-with-out-of-tree-block/241036 "2014-05-12T17:26:33Z")
I have an energy detector block and I am trying to gr\_message with it: void energy\_detector\_sink\_f\_impl::send\_to\_message\_q(float \*buffer, int buffersz) { gr\_message\_sprt msg = gr\_make\_message(0, sizeof(float), buff… --- ## [OFDM transceiver in USRP E 110](https://www.ruby-forum.com/t/ofdm-transceiver-in-usrp-e-110/241060)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 3\ **Last updated:** [May 12, 2014, 3:03pm UTC](https://www.ruby-forum.com/t/ofdm-transceiver-in-usrp-e-110/241060 "2014-05-12T15:03:03Z")
Hi, I’m working in a project which deals with implementation of an OFDM transceiver(without any standard the purpose is to transmit et receive any kind of datas) with gnuradio in USRP E 110. Any idea plz to get star… --- ## [Broken gnuplot](https://www.ruby-forum.com/t/broken-gnuplot/239408)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 10\ **Last updated:** [May 12, 2014, 11:25am UTC](https://www.ruby-forum.com/t/broken-gnuplot/239408 "2014-05-12T11:25:10Z")
Hi all guys, lately I have experienced some problems with showing scope and fft plot. Namely, the plots looks raw and ugly. Once there was an report that gnuplot was killed. Any idea how to check and repair this? B… --- ## [Adding channel effects to an input in GNURADIO](https://www.ruby-forum.com/t/adding-channel-effects-to-an-input-in-gnuradio/241066)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 3\ **Last updated:** [May 12, 2014, 10:43am UTC](https://www.ruby-forum.com/t/adding-channel-effects-to-an-input-in-gnuradio/241066 "2014-05-12T10:43:18Z")
Hi all, (Ubuntu 13.04, GNURADIO 3.7) I have a question regarding the channel models. As far I know the channel function must be convolved (convolution) with the input to get the output like this: out = conv(in,chann… --- ## [Non-english GNU Radio mailing lists and resources?](https://www.ruby-forum.com/t/non-english-gnu-radio-mailing-lists-and-resources/241073)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 0\ **Last updated:** [May 12, 2014, 10:01am UTC](https://www.ruby-forum.com/t/non-english-gnu-radio-mailing-lists-and-resources/241073 "2014-05-12T10:01:25Z")
Hi, a quick survey: Does anyone know of/use/maintain non-English mailing lists or resources for GNU Radio? And yes, I realize the irony of asking for this on the English mailing list :slight\_smile: Martin --- ## [EAS/SAME Decoding?](https://www.ruby-forum.com/t/eas-same-decoding/241065)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 1\ **Last updated:** [May 12, 2014, 9:53am UTC](https://www.ruby-forum.com/t/eas-same-decoding/241065 "2014-05-12T09:53:26Z")
How would one create a SAME decoder in GNURadio? EAS being the Emergency Alert System, AMBER alerts, etc. I can tune to Weather radio; but I was wondering if I could listen to the EAS channels themselves. EAS: Emergen… --- ## [Simple grc GUI question](https://www.ruby-forum.com/t/simple-grc-gui-question/241067)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 3\ **Last updated:** [May 12, 2014, 8:39am UTC](https://www.ruby-forum.com/t/simple-grc-gui-question/241067 "2014-05-12T08:39:39Z")
Hi, I need to align the audio switching network of my ham radio repeater db0fue, and it would be nice to have some GRC GUI element that allows me to switch between two predefined RF frequencies. Never worked with th… --- ## [Announcing NEWSDR in Boston on Friday June 6](https://www.ruby-forum.com/t/announcing-newsdr-in-boston-on-friday-june-6/241062)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 0\ **Last updated:** [May 11, 2014, 8:31pm UTC](https://www.ruby-forum.com/t/announcing-newsdr-in-boston-on-friday-june-6/241062 "2014-05-11T20:31:36Z")
Fourth-Annual \* \* New England Workshop on Software-Defined Radio \* NEWSDR 2014 \* … --- ## [How to update the value of a variable by reading message in grc?](https://www.ruby-forum.com/t/how-to-update-the-value-of-a-variable-by-reading-message-in-grc/240857)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 1\ **Last updated:** [May 11, 2014, 4:23pm UTC](https://www.ruby-forum.com/t/how-to-update-the-value-of-a-variable-by-reading-message-in-grc/240857 "2014-05-11T16:23:50Z")
Hi all, I’m working on a system with packet headers. I want to use the message decoded by the Packet Header Parser to update a variable. I knew the message can be stored in a message debug block, and be retrieved by… --- ## [Question on incorporate different constellation indexing in gr-digital constellation objects](https://www.ruby-forum.com/t/question-on-incorporate-different-constellation-indexing-in-gr-digital-constellation-objects/240860)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 1\ **Last updated:** [May 11, 2014, 4:20pm UTC](https://www.ruby-forum.com/t/question-on-incorporate-different-constellation-indexing-in-gr-digital-constellation-objects/240860 "2014-05-11T16:20:45Z")
Dear all, I have a question related to the constellation objects in gr-digital. After checking the constellation.cc, I found the constellation of 8PSK and QPSK class are all Grey coded. Now I want to use a 8PSK cons… --- ## [Py\_msg\_queue\_\_delete\_head](https://www.ruby-forum.com/t/py-msg-queue-delete-head/241056)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 1\ **Last updated:** [May 11, 2014, 4:18pm UTC](https://www.ruby-forum.com/t/py-msg-queue-delete-head/241056 "2014-05-11T16:18:54Z")
Hi, All I check the code in GNURadio 3.7.3, gnuradio-3.7.3/gnuradio-runtime/swig/msg\_queue.i the code: 83 #ifdef SWIGPYTHON 84 %inline %{ 85 gr::message::sptr py\_msg\_queue\_\_delete\_head(gr::msg\_queue::sptr q) { … --- ## [Change value of variable in GRC when a message is received](https://www.ruby-forum.com/t/change-value-of-variable-in-grc-when-a-message-is-received/240997)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 3\ **Last updated:** [May 11, 2014, 4:17pm UTC](https://www.ruby-forum.com/t/change-value-of-variable-in-grc-when-a-message-is-received/240997 "2014-05-11T16:17:41Z")
Is there a simple way for a GRC block to asynchronously change the value of a GRC variable when the block receives a specific message? thanks Achilleas --- ## [CDMA-UMTS protocol implementation with USRP1](https://www.ruby-forum.com/t/cdma-umts-protocol-implementation-with-usrp1/241033)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 2\ **Last updated:** [May 11, 2014, 4:12pm UTC](https://www.ruby-forum.com/t/cdma-umts-protocol-implementation-with-usrp1/241033 "2014-05-11T16:12:45Z")
Hello list, I am planning to implement CDMA-UMTS protocol with USRP 1 and GNU Radio. I’ve first established OpenBTS setup with USRP1 and OpenBTS 2.8. Now I want to implement CDMA-UMTS in the same way as OpenBTS to es… --- ## [Fwd: regarding your paper](https://www.ruby-forum.com/t/fwd-regarding-your-paper/241055)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 1\ **Last updated:** [May 11, 2014, 2:27pm UTC](https://www.ruby-forum.com/t/fwd-regarding-your-paper/241055 "2014-05-11T14:27:40Z")
hi , i have gone through bastin bloessl’s code for ieee\_802\_15\_4. i installed it in my ubuntu 12.04 having gnuradio v3.7 . it installed and i got the following error when i was trying to run the flowgraph. Tracebac… --- ## [Implementation of ieee 802-11 transeiver](https://www.ruby-forum.com/t/implementation-of-ieee-802-11-transeiver/241046)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 5\ **Last updated:** [May 11, 2014, 1:14pm UTC](https://www.ruby-forum.com/t/implementation-of-ieee-802-11-transeiver/241046 "2014-05-11T13:14:29Z")
Hi, I would like to implement a transceiver in USRP E 110 with gnuradio. For that I found a code concerning an implementation of ieee 802-11 of a transeiver with USRP N 210 descibed in this GitHub - bastibl/gr-ieee80… --- ## [How to manage time!](https://www.ruby-forum.com/t/how-to-manage-time/240998)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 12\ **Last updated:** [May 11, 2014, 3:33am UTC](https://www.ruby-forum.com/t/how-to-manage-time/240998 "2014-05-11T03:33:11Z")
Hello everybody, I want to have a block of, for example, bit generator, which generates 1000 bps. How could I manage the time in a thread (or equivalently in a block)?? Or saying in general, how could I manage timin… --- ## [Frequency Counter](https://www.ruby-forum.com/t/frequency-counter/241044)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 2\ **Last updated:** [May 10, 2014, 11:37pm UTC](https://www.ruby-forum.com/t/frequency-counter/241044 "2014-05-10T23:37:11Z")
Had anyone else seen the below errors with the GNU Radio live DVD when running scanoo\_rx? Thanks, Mike – Mike J. M0MIK BSc MIET Email: removed\_email\_address@domain.invalid Web: http://scanoo.com ---------- Forwar… --- ## [Ieee 802-11 in USRP E 110?](https://www.ruby-forum.com/t/ieee-802-11-in-usrp-e-110/241050)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 0\ **Last updated:** [May 10, 2014, 10:14pm UTC](https://www.ruby-forum.com/t/ieee-802-11-in-usrp-e-110/241050 "2014-05-10T22:14:12Z")
Hi, is there anyone here who tested GitHub - bastibl/gr-ieee802-11: IEEE 802.11 a/g/p Transceiver in USRP E 110 Just to know if it works or not. Best regards, Wafa --- ## [Implementation of ieee 802-11 transeiver](https://www.ruby-forum.com/t/implementation-of-ieee-802-11-transeiver/241048)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 1\ **Last updated:** [May 10, 2014, 9:40pm UTC](https://www.ruby-forum.com/t/implementation-of-ieee-802-11-transeiver/241048 "2014-05-10T21:40:20Z")
Hi, I would like to implement a transceiver in USRP E 110 with gnuradio. For that I found a code concerning an implementation of ieee 802-11 of a transeiver with USRP N 210 descibed in this GitHub - bastibl/gr-ieee80… --- ## [usrpN200 + TVRX2 50-860 MHz Rx x 2 for DVB-T](https://www.ruby-forum.com/t/usrpn200-tvrx2-50-860-mhz-rx-x-2-for-dvb-t/240994)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 1\ **Last updated:** [May 10, 2014, 1:41am UTC](https://www.ruby-forum.com/t/usrpn200-tvrx2-50-860-mhz-rx-x-2-for-dvb-t/240994 "2014-05-10T01:41:12Z")
Hi, (Ubuntu 13.04, GNURADIO 3.7) --- ## [GR-easy](https://www.ruby-forum.com/t/gr-easy/240982)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 1\ **Last updated:** [May 10, 2014, 1:01am UTC](https://www.ruby-forum.com/t/gr-easy/240982 "2014-05-10T01:01:59Z")
I was wondering what progress has been made since it’s debut with gr-easy and if it is publicly available. Mark [Previous page](https://www.ruby-forum.com/c/gnu-radio/15.md?page=72) [Next page](https://www.ruby-forum.com/c/gnu-radio/15.md?page=74)