# GNU Radio **URL:** https://www.ruby-forum.com/c/gnu-radio/15.md?page=68 [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:** 69 --- ## [GNu radio examples not running](https://www.ruby-forum.com/t/gnu-radio-examples-not-running/230217)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 6\ **Last updated:** [June 5, 2014, 11:07am UTC](https://www.ruby-forum.com/t/gnu-radio-examples-not-running/230217 "2014-06-05T11:07:17Z")
Hi All, When i try to run any of built in examples (in .py form) with GRC,i get the following error: Error: /usr/local/share/gnuradio/examples/audio/audio\_fft.py:1:1:FATAL:PARSER:ERR\_DOCUMENT\_EMPTY: Start tag expec… --- ## [Doxygen documentation](https://www.ruby-forum.com/t/doxygen-documentation/230216)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 4\ **Last updated:** [June 5, 2014, 11:06am UTC](https://www.ruby-forum.com/t/doxygen-documentation/230216 "2014-06-05T11:06:06Z")
How can i configure GNU Radio Companion 3.7.3 with Doxygen so taht i can view the blocks’ documentation from inside GRC?I have Doxygen installed but its not configured with GRC. Regards, Ali --- ## [Using WBFM block](https://www.ruby-forum.com/t/using-wbfm-block/230221)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 3\ **Last updated:** [June 5, 2014, 10:38am UTC](https://www.ruby-forum.com/t/using-wbfm-block/230221 "2014-06-05T10:38:24Z")
Hi All, I am doing simple wide band FM…The flowgraph is as attached…When i execute it i am getting following error: gr\_remez: insufficient extremals – cannot continue Traceback (most recent call last): File “/home/a… --- ## [Something about forecast()](https://www.ruby-forum.com/t/something-about-forecast/230184)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 3\ **Last updated:** [June 5, 2014, 4:15am UTC](https://www.ruby-forum.com/t/something-about-forecast/230184 "2014-06-05T04:15:11Z")
Hi all: I want to know something about the forecast(). I have already known that forcast() can tell scheduler how many input items are required for each output item. 1.But now i have read two example: The first one… --- ## [Re: Scheduling a block even with no input items RE: Flow graph blocking when doing 2x1 transmission](https://www.ruby-forum.com/t/re-scheduling-a-block-even-with-no-input-items-re-flow-graph-blocking-when-doing-2x1-transmission/230193)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 16\ **Last updated:** [June 5, 2014, 1:58am UTC](https://www.ruby-forum.com/t/re-scheduling-a-block-even-with-no-input-items-re-flow-graph-blocking-when-doing-2x1-transmission/230193 "2014-06-05T01:58:30Z")
On Wed, Jun 4, 2014 at 4:59 PM, David Halls removed\_email\_address@domain.invalid wrote: Hi! This shouldn’t be the case. But is there any easy way to allow different rates on the two streams, so I could produce more… --- ## [Tx\_time tag accuraccy](https://www.ruby-forum.com/t/tx-time-tag-accuraccy/230208)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 1\ **Last updated:** [June 4, 2014, 7:53pm UTC](https://www.ruby-forum.com/t/tx-time-tag-accuraccy/230208 "2014-06-04T19:53:06Z")
I am using stream tags for the transmission control. I want to know what is the accuracy/precision of the tx\_time tag? E.g if I tag a burst A with tx\_time=X, then the burst A will come out of the USRP transmit FIFO at … --- ## [Call for Volunteers - GNU Radio Website](https://www.ruby-forum.com/t/call-for-volunteers-gnu-radio-website/230209)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 0\ **Last updated:** [June 4, 2014, 7:37pm UTC](https://www.ruby-forum.com/t/call-for-volunteers-gnu-radio-website/230209 "2014-06-04T19:37:46Z")
Hello list! It’s been a few weeks since I’ve been connected/active on the list. After talking things over Tom and others in the community it is apparent that the GNU Radio “home site” is becoming more critical. Her… --- ## [GRC uses OSS instead of ALSA?](https://www.ruby-forum.com/t/grc-uses-oss-instead-of-alsa/230153)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 1\ **Last updated:** [June 4, 2014, 4:32pm UTC](https://www.ruby-forum.com/t/grc-uses-oss-instead-of-alsa/230153 "2014-06-04T16:32:31Z")
Hi guys, My application requires that I use a multi-channel audio device as an audio source. I have in my system of hardware the Presonus 1818VSL external USB device. This audio source is definetely working correc… --- ## [Gardner timing sync loop quetion](https://www.ruby-forum.com/t/gardner-timing-sync-loop-quetion/230171)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 1\ **Last updated:** [June 4, 2014, 4:23pm UTC](https://www.ruby-forum.com/t/gardner-timing-sync-loop-quetion/230171 "2014-06-04T16:23:39Z")
Hi all, I am designing a 2 order Gardner timing sync loop(with 1 order PI loop filter) for QAM64. As Best’s PLL book metioned, timing sync loop’s parameter can be calculated by using PLL theory. Now I need calculate… --- ## [NEWSDR Event This Friday June 6 in Boston](https://www.ruby-forum.com/t/newsdr-event-this-friday-june-6-in-boston/230191)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 0\ **Last updated:** [June 4, 2014, 11:24am UTC](https://www.ruby-forum.com/t/newsdr-event-this-friday-june-6-in-boston/230191 "2014-06-04T11:24:47Z")
Fourth-Annual \* \* New England Workshop on Software-Defined Radio \* NEWSDR 2014 \* … --- ## [Fwd: Re: something about forecast()](https://www.ruby-forum.com/t/fwd-re-something-about-forecast/230190)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 1\ **Last updated:** [June 4, 2014, 11:14am UTC](https://www.ruby-forum.com/t/fwd-re-something-about-forecast/230190 "2014-06-04T11:14:10Z")
\-------- Original Message -------- Subject: Re: \[Discuss-gnuradio\] something about forecast() Date: Wed, 4 Jun 2014 16:52:11 +0800 (CST) From: xianda removed\_email\_address@domain.invalid To: Marcus M??ller re… --- ## [Using uhd\_fft with USRP N210](https://www.ruby-forum.com/t/using-uhd-fft-with-usrp-n210/230189)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 2\ **Last updated:** [June 4, 2014, 11:07am UTC](https://www.ruby-forum.com/t/using-uhd-fft-with-usrp-n210/230189 "2014-06-04T11:07:05Z")
Hi, I’m trying to run uhd\_fft with usrp N210, my machine run ubuntu desktop 12.04.4 LTS. When I try to run uhd\_fft which is located in /usr/local/src/gnuradio-3.7.2.1/gr-uhd/apps directory, i’ve got the following me… --- ## [Can I use uhd\_fft or gnu-radio to display the spectrum with adjustable frequency resolution](https://www.ruby-forum.com/t/can-i-use-uhd-fft-or-gnu-radio-to-display-the-spectrum-with-adjustable-frequency-resolution/230183)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 7\ **Last updated:** [June 4, 2014, 8:49am UTC](https://www.ruby-forum.com/t/can-i-use-uhd-fft-or-gnu-radio-to-display-the-spectrum-with-adjustable-frequency-resolution/230183 "2014-06-04T08:49:12Z")
I am trying to use the uhd\_fft or gnu-radio scope in a way that it can show a real-time spectrum but with adjustable resolution. The uhd\_fft spectrum resolution appears to be fixed and not changeable. The gnu-radio s… --- ## [Could NOT find GNURADIO\_RUNTIME (missing: GNURADIO\_RUNTIME\_LIBRARIES)](https://www.ruby-forum.com/t/could-not-find-gnuradio-runtime-missing-gnuradio-runtime-libraries/230182)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 1\ **Last updated:** [June 3, 2014, 10:33pm UTC](https://www.ruby-forum.com/t/could-not-find-gnuradio-runtime-missing-gnuradio-runtime-libraries/230182 "2014-06-03T22:33:23Z")
Hi, How can I resolve the issue of “Could NOT find GNURADIO\_RUNTIME (missing: GNURADIO\_RUNTIME\_LIBRARIES)” when trying to build an out of tree module. I have gone through a number of the posts in the list and still … --- ## [Data Collection Across Multiple Machines and USRPs](https://www.ruby-forum.com/t/data-collection-across-multiple-machines-and-usrps/230181)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 3\ **Last updated:** [June 3, 2014, 9:12pm UTC](https://www.ruby-forum.com/t/data-collection-across-multiple-machines-and-usrps/230181 "2014-06-03T21:12:02Z")
Hey list, this is a question for anyone that has used the USRPs and GNU Radio for synchronized data collection. I need to collect data using USRP N210s across a wireless network for a field test. Basically the USRPs w… --- ## [Bash:idconfig:command not found ( gnuradio's installation on usrp e110)](https://www.ruby-forum.com/t/bashcommand-not-found-gnuradios-installation-on-usrp-e110/230174)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 2\ **Last updated:** [June 3, 2014, 2:24pm UTC](https://www.ruby-forum.com/t/bashcommand-not-found-gnuradios-installation-on-usrp-e110/230174 "2014-06-03T14:24:32Z")
Hi, I’m using linux angstrom on usrp e110. In order to finish the installation of guradio on usrp e110, I typed idconfig but it shows me “bash:idconfig:command not found”. I tried to add the path shown below: if us… --- ## [Scheduler source code](https://www.ruby-forum.com/t/scheduler-source-code/230167)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 2\ **Last updated:** [June 3, 2014, 8:49am UTC](https://www.ruby-forum.com/t/scheduler-source-code/230167 "2014-06-03T08:49:39Z")
Dear Sirs, To grasp a better understanding of how the scheduler works, I try to look into its source code. The files like scheduler.cc and scheduler.h don’t contain much code. The single\_threaded\_scheduler.cc contai… --- ## [Re: Flow graph blocking when doing 2x1 transmission](https://www.ruby-forum.com/t/re-flow-graph-blocking-when-doing-2x1-transmission/230161)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 1\ **Last updated:** [June 3, 2014, 8:46am UTC](https://www.ruby-forum.com/t/re-flow-graph-blocking-when-doing-2x1-transmission/230161 "2014-06-03T08:46:06Z")
Hi Marcus, I’m not sure if understand correctly then, how would you suggest it is possible to implement your suggestion ‘a block that (rate limitedly) produces zero-samples, unless data comes in on a message port?’ …… --- ## [RTL dongle not working with GRC 3.7.4 updated](https://www.ruby-forum.com/t/rtl-dongle-not-working-with-grc-3-7-4-updated/230121)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 2\ **Last updated:** [June 3, 2014, 6:21am UTC](https://www.ruby-forum.com/t/rtl-dongle-not-working-with-grc-3-7-4-updated/230121 "2014-06-03T06:21:49Z")
Since updating GRC3.7.3 to GRC3.7.4, I am unable to run my RTL dongle flow graphs. Attached is the error message that I receive. The flow graph worked perfectly with GRC3.7.3. Regards, John Petrich --- ## [\[GSoC\] Co-Processors Update #1](https://www.ruby-forum.com/t/gsoc-co-processors-update-1/230160)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 0\ **Last updated:** [June 2, 2014, 11:08pm UTC](https://www.ruby-forum.com/t/gsoc-co-processors-update-1/230160 "2014-06-02T23:08:07Z")
Hello everyone, Apologies for the delay in brining the update. There was a confusion with the hardware from TI and I was traveling the week GSoC started. Here are some brief points, for more detailed info please cons… --- ## [Flow graph blocking when doing 2x1 transmission](https://www.ruby-forum.com/t/flow-graph-blocking-when-doing-2x1-transmission/230140)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 9\ **Last updated:** [June 2, 2014, 7:44pm UTC](https://www.ruby-forum.com/t/flow-graph-blocking-when-doing-2x1-transmission/230140 "2014-06-02T19:44:08Z")
Dear All, I am using N210s with XCVR2450s. I have successfully performed 2x1 transmission, but not I am not transmitting the same stream over both transmitters. One stream is constantly available, and is no problem. T… --- ## [Fwd: Re: problem with my rx daughterboard](https://www.ruby-forum.com/t/fwd-re-problem-with-my-rx-daughterboard/230138)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 0\ **Last updated:** [June 2, 2014, 12:34pm UTC](https://www.ruby-forum.com/t/fwd-re-problem-with-my-rx-daughterboard/230138 "2014-06-02T12:34:47Z")
\-------- Original Message -------- From: “Marcus M??ller” removed\_email\_address@domain.invalid Sent: June 2, 2014 12:31:49 PM CEST To: Riana R. removed\_email\_address@domain.invalid, removed\_email\_address@domain.inval… --- ## [NEWSDR Event in Boston this Friday June 6](https://www.ruby-forum.com/t/newsdr-event-in-boston-this-friday-june-6/230139)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 0\ **Last updated:** [June 2, 2014, 12:28pm UTC](https://www.ruby-forum.com/t/newsdr-event-in-boston-this-friday-june-6/230139 "2014-06-02T12:28:54Z")
Fourth-Annual \* \* New England Workshop on Software-Defined Radio \* NEWSDR 2014 \* … --- ## [OFDM\_Cyclic\_Prefixer](https://www.ruby-forum.com/t/ofdm-cyclic-prefixer/230131)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 2\ **Last updated:** [June 2, 2014, 8:51am UTC](https://www.ruby-forum.com/t/ofdm-cyclic-prefixer/230131 "2014-06-02T08:51:49Z")
Discuss-gnuradio mailing list removed\_email\_address@domain.invalid https://lists.gnu.org/mailman/listinfo/discuss-gnuradio --- ## [C++11 support](https://www.ruby-forum.com/t/c-11-support/230130)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 1\ **Last updated:** [June 2, 2014, 2:45am UTC](https://www.ruby-forum.com/t/c-11-support/230130 "2014-06-02T02:45:42Z")
Hi list, Could anyone tell me about the C++11 support in gnuradio? Thanks. --- ## [A criticism to GNURadio's scheduler!](https://www.ruby-forum.com/t/a-criticism-to-gnuradios-scheduler/230123)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 11\ **Last updated:** [June 2, 2014, 12:38am UTC](https://www.ruby-forum.com/t/a-criticism-to-gnuradios-scheduler/230123 "2014-06-02T00:38:53Z")
Hi, I worked on GNURadio for many hours. After all, I prepared my blocks in c++. However, the source by which I produce random bits (items with sizeof(char) ) doesn’t work properly! By properly I mean, I wanted GNURa… --- ## [Run a top block within a block!](https://www.ruby-forum.com/t/run-a-top-block-within-a-block/230115)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 2\ **Last updated:** [June 1, 2014, 8:31am UTC](https://www.ruby-forum.com/t/run-a-top-block-within-a-block/230115 "2014-06-01T08:31:35Z")
Hi GNURadiores, I was thinking about how to change dynamically the blocks connected in my top block when it’s running! After a long time, I reach to this point that I may have a top block is running within a block! … --- ## [Sampling rate of a customized signal source](https://www.ruby-forum.com/t/sampling-rate-of-a-customized-signal-source/230108)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 6\ **Last updated:** [June 1, 2014, 7:32am UTC](https://www.ruby-forum.com/t/sampling-rate-of-a-customized-signal-source/230108 "2014-06-01T07:32:04Z")
Hi All, How to determine the sampling rate of a customized signal source? I designed a customized signal source which should output two 1ms pulses every 10ms. If I do not know the sampling rate of the customized modul… --- ## [Idea for gr-modtool](https://www.ruby-forum.com/t/idea-for-gr-modtool/230021)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 4\ **Last updated:** [May 31, 2014, 5:06pm UTC](https://www.ruby-forum.com/t/idea-for-gr-modtool/230021 "2014-05-31T17:06:31Z")
Over the weekend, I helped out a couple people trying out the gr-howto example on OSX \< http://gnuradio.org/redmine/projects/gnuradio/wiki/OutOfTreeModules \>. The common are of issue – which admittedly is primarily an… --- ## [Call the work() method](https://www.ruby-forum.com/t/call-the-work-method/230117)
**Author:** [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\ **Replies:** 11\ **Last updated:** [May 31, 2014, 3:26pm UTC](https://www.ruby-forum.com/t/call-the-work-method/230117 "2014-05-31T15:26:55Z")
Hi all: I know every block should have it’s work or general\_work function.And i know it’s used by scheduler. Now I want to write my c++ code just call work function.Is right to do it? If ok,can someone explain how t… [Previous page](https://www.ruby-forum.com/c/gnu-radio/15.md?page=67) [Next page](https://www.ruby-forum.com/c/gnu-radio/15.md?page=69)