# GNU Radio **URL:** https://www.ruby-forum.com/c/gnu-radio/15.md?page=69 [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:** 70 --- ## [Unable to log in usrpe 110 to get access to gnuradio on screen?](https://www.ruby-forum.com/t/unable-to-log-in-usrpe-110-to-get-access-to-gnuradio-on-screen/230048)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 4\ **Last updated:** [May 31, 2014, 11:23am UTC](https://www.ruby-forum.com/t/unable-to-log-in-usrpe-110-to-get-access-to-gnuradio-on-screen/230048 "2014-05-31T11:23:14Z")
Hi, I made a reboot of the usrp e110. I got on the screen a button login. But I’m unable to login with a mouse. In fact, the mouse doesn’t work on usrp. But the mouse works well on my laptop. In fact, I even connecte… --- ## [Using file descriptor sink?](https://www.ruby-forum.com/t/using-file-descriptor-sink/230101)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 6\ **Last updated:** [May 30, 2014, 8:02pm UTC](https://www.ruby-forum.com/t/using-file-descriptor-sink/230101 "2014-05-30T20:02:14Z")
Hello GR, Can anyone please give me some hints on how to use gr-file descriptor sink in a gnuradio python flowgraph. Regards, Ruecan – View this message in context: http://gnuradio.4.n7.nabble.com/Using-file-desc… --- ## [Embedded Update](https://www.ruby-forum.com/t/embedded-update/230105)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 0\ **Last updated:** [May 30, 2014, 7:28pm UTC](https://www.ruby-forum.com/t/embedded-update/230105 "2014-05-30T19:28:15Z")
I’ve update the OpenEmbedded Manifest to track the Daisy release branches of the various layers. This should create a stable baseline for people doing embedded work. I update the README at: to reflect this. Please… --- ## [Question on 802.15.4 implementation](https://www.ruby-forum.com/t/question-on-802-15-4-implementation/230057)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 2\ **Last updated:** [May 30, 2014, 5:19pm UTC](https://www.ruby-forum.com/t/question-on-802-15-4-implementation/230057 "2014-05-30T17:19:53Z")
Hi , I am trying to send a simple message between two USRPs using the new message passing interface in GNU Radio 3.7 over 802.15.4 implementation. I created a “message generator” which publishes a message to the “app … --- ## [Dynamically changing input index of Selector block](https://www.ruby-forum.com/t/dynamically-changing-input-index-of-selector-block/230012)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 9\ **Last updated:** [May 30, 2014, 4:22pm UTC](https://www.ruby-forum.com/t/dynamically-changing-input-index-of-selector-block/230012 "2014-05-30T16:22:28Z")
Hi all, In my flow graph I am using two different inputs. At particular time, only one input is selected. For this I am using ‘Selector’ block with two inputs and only one output. I want to change ‘input index’ of … --- ## [Header\_payload\_demux](https://www.ruby-forum.com/t/header-payload-demux/230085)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 4\ **Last updated:** [May 30, 2014, 9:32am UTC](https://www.ruby-forum.com/t/header-payload-demux/230085 "2014-05-30T09:32:56Z")
Hi: Thank you in advance. I have two simple question: 1.In the grc,i see a block: header\_payload\_demux It has 3 input:in,trigger,header\_data.But i see the header\_payload\_demux\_impl.cc:iosignature::make2(1,2,…,…).But… --- ## [Importing blocks to GRC](https://www.ruby-forum.com/t/importing-blocks-to-grc/230061)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 9\ **Last updated:** [May 29, 2014, 8:23pm UTC](https://www.ruby-forum.com/t/importing-blocks-to-grc/230061 "2014-05-29T20:23:18Z")
Hi, I am working on a ubuntu machine and am following the HOWTO example as the following link shows. My program works fine until loading the howto\_square2\_ff module into the GRC library. The tutorial says that “If … --- ## [Using an OFDM Modulation for Transmit\_Path.py and Receive\_Path.py](https://www.ruby-forum.com/t/using-an-ofdm-modulation-for-transmit-path-py-and-receive-path-py/230083)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 0\ **Last updated:** [May 29, 2014, 7:50pm UTC](https://www.ruby-forum.com/t/using-an-ofdm-modulation-for-transmit-path-py-and-receive-path-py/230083 "2014-05-29T19:50:30Z")
I am building a hierarchical block for an OFDM tranceiver (two classes in the same py file) and I was wondering if I could save time by using the old transmit\_path and receive\_path scripts. Would they work with the O… --- ## [Assertion error beyond 4096 output items](https://www.ruby-forum.com/t/assertion-error-beyond-4096-output-items/230047)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 18\ **Last updated:** [May 29, 2014, 11:56am UTC](https://www.ruby-forum.com/t/assertion-error-beyond-4096-output-items/230047 "2014-05-29T11:56:31Z")
Hi we have written a c++ block using out of tree modules which uses a sync block that outputs same no of items as input items given. we have written a python test file where the inputs and outputs are complex floats… --- ## [Out of Tree Encryption block](https://www.ruby-forum.com/t/out-of-tree-encryption-block/230052)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 3\ **Last updated:** [May 29, 2014, 11:34am UTC](https://www.ruby-forum.com/t/out-of-tree-encryption-block/230052 "2014-05-29T11:34:15Z")
I want to simulate a voice transmission system in GNURadio Companion (GRC). My system configuration is as follows: TRANSMITTER : Wav file source → encoder → encryption → modulator → RF RECEIVER : speaker/Wav file… --- ## [Re: Discuss-gnuradio Digest, Vol 138, Issue 39](https://www.ruby-forum.com/t/re-discuss-gnuradio-digest-vol-138-issue-39/230059)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 1\ **Last updated:** [May 28, 2014, 11:31pm UTC](https://www.ruby-forum.com/t/re-discuss-gnuradio-digest-vol-138-issue-39/230059 "2014-05-28T23:31:58Z")
Thanks for reply Martin, can you exactly tell me what should be first step in order to receive 8MHz frequency spectrum --- ## [Spectrum chunk](https://www.ruby-forum.com/t/spectrum-chunk/230053)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 1\ **Last updated:** [May 28, 2014, 4:17pm UTC](https://www.ruby-forum.com/t/spectrum-chunk/230053 "2014-05-28T16:17:26Z")
dear list, I am digging to find out how to record a frequency bandwidth e.g. 1100-1125MHz; I already have USRP1 with DBRX, which I suppose able to capture 25MHz frequency bandwidth as per their specification. I play… --- ## [GNU Radio Measurement Toolbox -- GSoC '14 Project](https://www.ruby-forum.com/t/gnu-radio-measurement-toolbox-gsoc-14-project/241303)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 5\ **Last updated:** [May 28, 2014, 12:25pm UTC](https://www.ruby-forum.com/t/gnu-radio-measurement-toolbox-gsoc-14-project/241303 "2014-05-28T12:25:23Z")
\-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi, GR community! I was elected to do a Google Summer of Code project. Thanks for all the constructive feedback on my proposal, and all the support, ideas and hints I go… --- ## [GR and git on non-networked machine](https://www.ruby-forum.com/t/gr-and-git-on-non-networked-machine/230033)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 3\ **Last updated:** [May 28, 2014, 12:17pm UTC](https://www.ruby-forum.com/t/gr-and-git-on-non-networked-machine/230033 "2014-05-28T12:17:16Z")
If I want to run GR (and keep it updated via git) on a non-networked machine, can I “git clone”, copy the resulting gnuradio directory to a DVD, then “git pull” from that DVD (specifically the \*.git that is created i… --- ## [Debian Jessie update](https://www.ruby-forum.com/t/debian-jessie-update/230040)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 4\ **Last updated:** [May 28, 2014, 11:31am UTC](https://www.ruby-forum.com/t/debian-jessie-update/230040 "2014-05-28T11:31:54Z")
Hi, I am not able to run GRC after updating my Debian Jessie. (apt-get update, apt-get dist-upgrade, apt-get autoremove) I am using Debian jessie. Before this GRC run well. user1@pc1: ~ $ gnuradio-config-info -v gn… --- ## [Muthaspewka!](https://www.ruby-forum.com/t/muthaspewka/230005)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 10\ **Last updated:** [May 28, 2014, 9:18am UTC](https://www.ruby-forum.com/t/muthaspewka/230005 "2014-05-28T09:18:44Z")
git clone --progress gnuradio.git - GNU Radio Cloning into gnuradio… error: Unable to get pack file http://gnuradio.org/git/gnuradio.git/objects/pack/pack-f226f3ea8e0b1778c849c7ac2c27532d22f0fefd.pack transfer closed… --- ## [GNU Radio distribution and build from source](https://www.ruby-forum.com/t/gnu-radio-distribution-and-build-from-source/230022)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 3\ **Last updated:** [May 28, 2014, 1:53am UTC](https://www.ruby-forum.com/t/gnu-radio-distribution-and-build-from-source/230022 "2014-05-28T01:53:39Z")
I think the distribution and build system needs some improvement. I say that because a disproportionate amount of traffic on this list seems to pertain to building the software from source. It shouldn’t be this hard … --- ## [Gnu radio - vhdl](https://www.ruby-forum.com/t/gnu-radio-vhdl/230023)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 2\ **Last updated:** [May 28, 2014, 12:26am UTC](https://www.ruby-forum.com/t/gnu-radio-vhdl/230023 "2014-05-28T00:26:50Z")
Is there a way to convert c++ blocks and connections to VHDL code for implementing them in digital way Neil --- ## [Is Simple Framer and Simple Correllator blocks will synchronize my data?](https://www.ruby-forum.com/t/is-simple-framer-and-simple-correllator-blocks-will-synchronize-my-data/230013)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 2\ **Last updated:** [May 27, 2014, 8:37pm UTC](https://www.ruby-forum.com/t/is-simple-framer-and-simple-correllator-blocks-will-synchronize-my-data/230013 "2014-05-27T20:37:17Z")
Hi all, I am working on QPSK Transceiver I have done all the synchronization at receiver except frame delays means frame synchronization is lift. there are some delays in my recieved data at start I have some garbage… --- ## [Meet-up in Blacksburg, VA](https://www.ruby-forum.com/t/meet-up-in-blacksburg-va/230035)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 0\ **Last updated:** [May 27, 2014, 6:42pm UTC](https://www.ruby-forum.com/t/meet-up-in-blacksburg-va/230035 "2014-05-27T18:42:44Z")
Hi everyone, I’m at Virginia Tech in Blacksburg, VA this week for the Wireless@VTSymposium. If anyone else is around, either just in the area or around for the symposium, we’re having a meet-up at Macado’s tomorrow n… --- ## [Swap file generation (was: Re: Removing the old version and Installing gnuradio 3.7 on USRP E 110)](https://www.ruby-forum.com/t/swap-file-generation-was-re-removing-the-old-version-and-installing-gnuradio-3-7-on-usrp-e-110/229948)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 3\ **Last updated:** [May 27, 2014, 2:43pm UTC](https://www.ruby-forum.com/t/swap-file-generation-was-re-removing-the-old-version-and-installing-gnuradio-3-7-on-usrp-e-110/229948 "2014-05-27T14:43:09Z")
Hi Wafa, On 23.05.2014 13:55, Wafa E. wrote: The parameter: {-L label | LABEL=label} LABEL of device to be used {-U uuid | UUID=uuid} UUID of device to be used … --- ## [Timing Analysis of Blocks](https://www.ruby-forum.com/t/timing-analysis-of-blocks/230010)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 1\ **Last updated:** [May 27, 2014, 9:08am UTC](https://www.ruby-forum.com/t/timing-analysis-of-blocks/230010 "2014-05-27T09:08:24Z")
Hi, I was wondering if it is possible to do timing analysis for GNU Radio blocks? If so, what is the mechanism for finding time usage by an individual block in a flowgraph? Thanks in advance. Yours thankfully, Shas… --- ## [ColtrolPort IC Timeout](https://www.ruby-forum.com/t/coltrolport-ic-timeout/241301)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 3\ **Last updated:** [May 27, 2014, 5:37am UTC](https://www.ruby-forum.com/t/coltrolport-ic-timeout/241301 "2014-05-27T05:37:12Z")
I have a gui-less flowgraph that runs in the background with sudo privileges. While I can run ControlPort normally from GRC, it doesn’t seem to work properly with my backgrounded FG - I get timeout errors. My confi… --- ## [Frequency modulation in GRC](https://www.ruby-forum.com/t/frequency-modulation-in-grc/229942)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 10\ **Last updated:** [May 27, 2014, 1:51am UTC](https://www.ruby-forum.com/t/frequency-modulation-in-grc/229942 "2014-05-27T01:51:47Z")
Hi, I have made the flowgraph as attached…It is showing the modulation in scope but in fft block it’s continuously changing so I am still unable to find out that what are the max and min frequencies??I know how to f… --- ## [Re: Build on ubuntu 14.04](https://www.ruby-forum.com/t/re-build-on-ubuntu-14-04/230004)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 1\ **Last updated:** [May 27, 2014, 12:04am UTC](https://www.ruby-forum.com/t/re-build-on-ubuntu-14-04/230004 "2014-05-27T00:04:15Z")
Thank You all for the hints. Thanks to Marcus, Sid, Bob! Yes, it works now! I think, the observation from Sid was the way of success. So the reason was: too low (1GB!) RAM for the VM! After increase up to e.g. 3,5 GB… --- ## [Correlate\_access\_code\_tag\_bb gives Assertion \`px != 0' failed](https://www.ruby-forum.com/t/correlate-access-code-tag-bb-gives-assertion-px-0-failed/229999)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 0\ **Last updated:** [May 26, 2014, 4:32pm UTC](https://www.ruby-forum.com/t/correlate-access-code-tag-bb-gives-assertion-px-0-failed/229999 "2014-05-26T16:32:18Z")
Hi All, I am trying to sync to a access code for a bit stream to determine the start of a packet and pack bits to a byte from that point. I have challenges getting correlate\_access\_code\_tag\_bb working. Attached is a … --- ## [Mouse and keyboard don't work on usrp e110?](https://www.ruby-forum.com/t/mouse-and-keyboard-dont-work-on-usrp-e110/229996)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 0\ **Last updated:** [May 26, 2014, 2:30pm UTC](https://www.ruby-forum.com/t/mouse-and-keyboard-dont-work-on-usrp-e110/229996 "2014-05-26T14:30:48Z")
Hi, I connected the usrp e110 to usb hub(with usb host) which is connected to a keyboard, a mouse and a pen drive( for swap memory). When I try to login the mouse pointer doesn’t work. I’m sure that the mouse work… --- ## [Build on ubuntu 14.04](https://www.ruby-forum.com/t/build-on-ubuntu-14-04/229983)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 6\ **Last updated:** [May 26, 2014, 11:43am UTC](https://www.ruby-forum.com/t/build-on-ubuntu-14-04/229983 "2014-05-26T11:43:12Z")
Dear list, I try to compile the new GR 3.7.4-git. But it breaks with pybombs as well as with the script build-grc.sh The job is done inside of a virtualbox-environment. host: win8.1, guest ubuntu 14.04 + updates Mem… --- ## [How to set a master clock rate on USRP B200](https://www.ruby-forum.com/t/how-to-set-a-master-clock-rate-on-usrp-b200/229950)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 6\ **Last updated:** [May 26, 2014, 10:28am UTC](https://www.ruby-forum.com/t/how-to-set-a-master-clock-rate-on-usrp-b200/229950 "2014-05-26T10:28:03Z")
Hello All Gnu Radio user, To use a 2 TX, I want to change a clock rate to an accepted one, under 30.72 MHz. I use the API with uhd\_usrp\_probe and it works only for this command. Can you give me the idea or python code… --- ## [Some guidance on working through Core concepts of GNU Radio](https://www.ruby-forum.com/t/some-guidance-on-working-through-core-concepts-of-gnu-radio/229989)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 2\ **Last updated:** [May 26, 2014, 7:12am UTC](https://www.ruby-forum.com/t/some-guidance-on-working-through-core-concepts-of-gnu-radio/229989 "2014-05-26T07:12:23Z")
Im working through http://gnuradio.org/redmine/projects/gnuradio/wiki/TutorialsCoreConcepts Ive created the flow graph: Im unsure on how to address the problem reported on Complex to Mag^2 as below, could you offer s… [Previous page](https://www.ruby-forum.com/c/gnu-radio/15.md?page=68) [Next page](https://www.ruby-forum.com/c/gnu-radio/15.md?page=70)