Re: [Discuss-gnuradio] Rational Resampler no output.

https://github.com/gnuradio/gnuradio/issues/1348 Regards: Cor On Mon, 2017-06-26 at 14:11 +0200, Marcus Müller wrote: > > That's mightily interesting! I feel like we should be doing bug >   reports, but I'm not sure where. > > > > > On 26.06.2017 06:42, Cor Legemaat >    

Re: [Discuss-gnuradio] Read and Write a PMT input/output GNURadio C++

Hi. Thanks a lot for your time to read. I read the two links that you shared to me, Marcus. Thanks a lot for your help. But i still have a problem. I've implemented as follows: - I create, the output, input and the handler: message_port_register_out(pmt::mp("out_threshold"));

Re: [Discuss-gnuradio] dB or dBm

Yes my comment was for synchronous sampling. You need to window for a general purpose condition. A simpler explanation is that the DFT uses "periodic glasses." That is you take your sample and slap identical

Re: [Discuss-gnuradio] Undefined reference gr::blocks::count_bits8

You have to add BLOCKS in addition to RUNTIME. That is, change the existing line: set(GR_REQUIRED_COMPONENTS RUNTIME) to: set(GR_REQUIRED_COMPONENTS RUNTIME BLOCKS) Ron On 06/26/2017 02:46 PM, Antonis Tzougkarakis wrote: Hello Marcus, I have added this in my main cmake:

Re: [Discuss-gnuradio] Undefined reference gr::blocks::count_bits8

Hello Marcus, I have added this in my main cmake: set(GR_REQUIRED_COMPONENTS BLOCKS). Although, when I tried to compile it I got the following message: Swig source /home/tzugarak/git/gr-ieee802_15_4g_testing/swig/ieee802_15_4g_testing_swig.i:5: Error: Unable to find 'gnuradio.i'

Re: [Discuss-gnuradio] Undefined reference gr::blocks::count_bits8

Hello Tzougkarakis, do you also /link/ against gr-blocks? It's probably sufficient to add "BLOCKS" to GR_REQUIRED_COMPONENTS in your OOT's main CMakeLists.txt. Best regards, Marcus On 26.06.2017 21:21, Tzougkarakis Antonis wrote: > Hello, > > I have an OOT module which I have created with

[Discuss-gnuradio] Windows Binaries v1.3.0 posted

All, A new set of windows binaries are now posted. A number of new packages have been added. http://www.gcndevelopment.com/gnuradio/downloads.htm Changes: 1. A complete debug version is now available, with the whole stack including all dependencies built in debug mode. Symbols for

[Discuss-gnuradio] Undefined reference gr::blocks::count_bits8

Hello, I have an OOT module which I have created with gr_modtool and I want to use the function count_bits_8 and count_bits_16 from gnuradio/blocks/count_bits.h. I have included the library in my c++ file but when I try to compile it I get the following message: [ 80%] Linking CXX

Re: [Discuss-gnuradio] FM Modulation problem/question

On Mon, Jun 26, 2017 at 1:50 PM Brashendeavours wrote: > Thank you, Kevin. That is reassuring. > > My next question then, is since the deviation is affected by both > amplitude and frequency, how would you recommend I empirically > determine/set a peak deviation of

Re: [Discuss-gnuradio] FM Modulation problem/question

On Mon, Jun 26, 2017 at 10:48 AM, Brashendeavours wrote: > My next question then, is since the deviation is affected by both > amplitude and frequency, how would you recommend I empirically > determine/set a peak deviation of 2400Hz for 1200Hz baseband? > The

[Discuss-gnuradio] Automating Transmit Gain

Hello GuysI want to have the uhd sink block in my flow graph automatically cycle through a number of transmit gain values. I'm thinking of developing two blocks, one which will take in  a certain number of items and once it reaches a certain value a message will be sent to another block which

Re: [Discuss-gnuradio] FM Modulation problem/question

Thank you, Kevin. That is reassuring. My next question then, is since the deviation is affected by both amplitude and frequency, how would you recommend I empirically determine/set a peak deviation of 2400Hz for 1200Hz baseband? Is this experiment not possible to visualize/determine on a

Re: [Discuss-gnuradio] Read and Write a PMT input/output GNURadio C++

Hi Cristian, you need to subscribe a /handler/ to the message port. See: https://wiki.gnuradio.org/index.php/Guided_Tutorial_Programming_Topics#5.3.2_Adding_Message_Passing_to_the_Code It's absolutely up to you what kind of PMT you're publishing over a message port, but it's canonical to have a

[Discuss-gnuradio] Read and Write a PMT input/output GNURadio C++

Hi all, I'm not sure about how to read and write PMT ports from and to local variables. I'm going to expose what i'm doing, and if someone can help me i would be very greatful. I've created an input and an output of PMT type. message_port_register_in(pmt::pmt_t in_threshold)

Re: [Discuss-gnuradio] FM Modulation problem/question

On Mon, Jun 26, 2017 at 10:07 AM, Brashendeavours wrote: > Where my results differ from what I expect, is approximately above 100Hz. > Using an baseband of 1200Hz, I no longer get a signal sweeping from -ive to > +ive, I get [a constant frequency of 1200Hz on the

[Discuss-gnuradio] FM Modulation problem/question

I am trying to wrap my head around FM modulation, and have setup some experiments in GNU Radio to help, but they have only raised more questions. I am trying to achieve a peak deviation of 2400Hz using a baseband signal of 1200Hz. In my flowgraph [here](http://imgur.com/5pzSnsq), and [here](

Re: [Discuss-gnuradio] dB or dBm

Hi! I fully agree with "for modulated signals, power estimates get more complicated"; I have the uncontrollable urge to be a smartass, however, about this: > A sine wave only has one bin. Nope. That's true only for oscillations that fit /exactly/ in the number of samples observed by the DFT

Re: [Discuss-gnuradio] libqwt

Hello Sebastian, Could you please show me how to build it from sources on Ubuntu 14.04? Thanks -- View this message in context: http://gnuradio.4.n7.nabble.com/libqwt-tp64355p64370.html Sent from the GnuRadio mailing list archive at Nabble.com.

Re: [Discuss-gnuradio] Rational Resampler no output.

That's mightily interesting! I feel like we should be doing bug reports, but I'm not sure where. On 26.06.2017 06:42, Cor Legemaat wrote: > Found it: > > Created an C++ app that called that function with the same parameter > values as with python for this flow graph. Witch I was able to debug >

Re: [Discuss-gnuradio] dB or dBm

When a signal is modulated, you need to use a FFT technique ‎to get the power. My experience is all based on outmoded analog modem design, but the idea is the same. The hardware FFT based spectrum analyzer sums

Re: [Discuss-gnuradio] dB or dBm

Well, dBm is an absolute power, based on 0dBm = 1mW. The dB figures of your receiver are only relative values, they have no meaning. However those get interesting when something changes. You just need to understand that the input of -20dBm power has nothing to do with the resulting reading of