Re: [Discuss-gnuradio] Frequency modulation in GRC

Another question related to my flowgraph that when i use the' Frequency Mod' block...then it will take the center frequency as 50Hz(the freq of the signal coming in)?? On Fri, May 23, 2014 at 1:28 PM, Ron Economos wrote: > I was experimenting with this the other day. I used > the wide band FM

Re: [Discuss-gnuradio] How to change a master clock rate on USRP B210

In the device parameter write 'set_master_clock_rate=30e6' On Fri, May 23, 2014 at 9:08 PM, raf raf wrote: > 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.

Re: [Discuss-gnuradio] Frequency modulation in GRC

Correction not 50 Hz but whatever the rate is after interpolation On Sat, May 24, 2014 at 12:23 PM, jason sam wrote: > Another question related to my flowgraph that when i use the' Frequency > Mod' block...then it will take the center frequency as 50Hz(the freq of the > signal coming in)?? > >

Re: [Discuss-gnuradio] Frequency modulation in GRC

Ali, again: there is no center frequency in a baseband simulation. Your sawtooth-repeat combination will give you a step signal, where the amplitude is constant for 500 items. All frequencies that you set are only used to calculate what will happen in one sample. The frequency mod is but an input

Re: [Discuss-gnuradio] Maximum supported frequency

Hi Mohamed, > I was sure that is just related to what my machine can process that's the opposite of what Martin said. GNU Radio does not care the slightest about how high your sampling rate is. Some blocks need this information to calculate relative frequence (ie. frequencies related to the unit "

Re: [Discuss-gnuradio] Installation issues with gnuradio on Ubuntu 12.04

On 5/23/2014 11:37 PM, Activecat wrote: On Sat, May 24, 2014 at 2:15 PM, Ron Economos > wrote: Custom install locations do require some additional environment setup. Sylvain gave me a nice shell script for that. BASE=/opt/gnuradio export PATH=${PATH}:$

Re: [Discuss-gnuradio] GSoC participant ; Introduction, progress, plan etc

New blog posts up related to VOLK kernels. Seeking comments and feedback. http://abhishekbhowmick.blogspot.in/ On Sun, Apr 27, 2014 at 9:24 PM, Abhishek Bhowmick wrote: > Hi everyone, > I have been selected for GSoC 2014 under GNU Radio. I will be working > on VOLK over the summer - my project pr

[Discuss-gnuradio] cmake problem

Hi, I want to ask these questions about how to write cmake lists when we making gr-xxx projects (modules) with gr_modtool: 1- How could I add dependencies of my project! For example I'm using a c++ library in one of my gr block, so how could I tell cmake to check the dependency? I read GNURadio t

Re: [Discuss-gnuradio] Post Binary Slicer question

Hi, as I have mentioned a few weeks ago I was working on a GR module that can be used for receiving and decoding messages sent from TI CC11xx based devices. I've now pushed a first version of it to my github repo [1]. It features a 2-FSK receiver entirely built from stock GR blocks and a deframer

[Discuss-gnuradio] (no subject)

Hi I am trying to establish a simple link between two USRPs. My flow graph is File_Source->PSK_MOD(BPSK)->USRP_sink USRP_Source->PSK_Demod->pack_k_bits->File_Sink. The received data is not matching with the source data. I removed the USRPs and directly connected the PSK_MOD to PSK_DEMOD in flow gra

Re: [Discuss-gnuradio] (no subject)

hello SHRIHARSHA, If your simulation looks good, try and see what's different about the incoming signal on air as opposed to the simulation. Is the frequency offset maybe too large? Is the received amplitude correct? Try mapping these into your simulation and see where things start to fall apart. A

[Discuss-gnuradio] Announcing NEWSDR Event in Boston on Friday June 6

* * Fourth-Annual * * * * New England Workshop on Software-Defined Radio* * NEWSDR 2014 * *

Re: [Discuss-gnuradio] Maximum supported frequency

Hi Martin, I'm not sure that (what I've understood) was the opposite of what Martin said, but anyway, I really appreciate your answer. Could you please tell me where I can find more about this question ? and where I can find the source code related to that "sample" unit ? so I can see closely how

Re: [Discuss-gnuradio] cmake problem

Hi Mostafa, first things first: If you're trying to use things from the GNU Radio main tree, refer to [1]. If you want to use external libraries, you will need to modify the CMakeLists.txt in your module directory and in your lib/ directory. In the main CMakeLists.txt you will find a paragraph s

[Discuss-gnuradio] PSK mod/demod: errors in the first 50 bytes (was: Re: (no subject))

Hi Shriharsha, As Zakaria already pointed out, since real channels are imperfect, packet losses *must* occur. The demod will need some samples to lock on to your rx signal, so losses at start are to be expected. I can only point you to some reference: there is a GNU Radio Companion file in gnurad

Re: [Discuss-gnuradio] Maximum supported frequency

Hi Mohamed, I can not really point you to more reference than your basic (discrete) signal theory textbook[1]. Basically, when processing sampled signals, time stops mattering, since samples are but numbers. Thus, "sample" is no unit. the notion that a digital signal has a frequency is only that i

[Discuss-gnuradio] FS: bladeRF x40

Hello all, Up for sale is a bladeRFx40 in excellent working condition, purchased last October. 1 x bladeRF x40 (http://www.nuand.com/blog/product/bladerf-x40/) + 1 x USB 3.0 SS cable + 1 x SMA cable + 1 x Acrylic cover kit by SK Pang ( http://skpang.co.uk/catalog/acrylic-cover-for-nuand-bladerf-b

[Discuss-gnuradio] Nagoya NA-773 Whip Wide-Band Mod for SDR

I have seen a few messages asking about small, cheap antennas to use for portable SDRs, considering the RF bandwidths can span two decades. I found an SMA female, 12” telescoping whip and made a video showing how to remove the loading coil, along with the VSWR obtainable with an appropriate cou

[Discuss-gnuradio] Checksum error installing from 'port install gnuradio +all'

Hello all, I use port as my package manager, and I'm seeing this error: 'sudo port install gnuradio +all' :error:checksum Checksum (sha256) mismatch for gnuradio-3.7.3.tar.gz :info:checksum Portfile checksum: gnuradio-3.7.3.tar.gz sha256 bec2eee034a525b268e14b2b2529d419313d36844f794f730f7176f75

Re: [Discuss-gnuradio] Checksum error installing from 'port install gnuradio +all'

Hi Michael, there's already a macports bug for that: https://trac.macports.org/ticket/43445 and it seems that Michael Dickens (the GNU Radio Macports maintainer) has proposed a solution. Could you try that? (and maybe the port clean --all gnuradio; selfupate; install gnuradio first) Greetings, Ma