[Discuss-gnuradio] Disconnect parts of multiple flowgraphs

2009-02-27 Thread Paul Mathews
I have a nice gnuradio app running using USRP, with 3 FFTsinks going at once, with the 1st FFTsink taking data from the USRP and the 2nd and 3rd FFTsinks each showing the results of further processing: 1) USRP downconverting to 1 MHz ---> FFT display 1 2) Channel filter LP to 16 kHz ---> FFT displ

[Discuss-gnuradio] Re: OpenBTS compilation error

2009-02-27 Thread Jane Chen
Hi, I also encountered the same errors. USRPDevice.h:42: error: ‘usrp_standard_rx_sptr’ does not name a type USRPDevice.h:43: error: ‘usrp_standard_tx_sptr’ does not name a type Where can I get the "attached patch"??? Thank you, Jane Martin Dvh wrote: > T. W. wrote: >> Windows XP machine. >>

Re: [Discuss-gnuradio] UCLA Zigbee Phy Updated

2009-02-27 Thread Eric Blossom
On Fri, Feb 27, 2009 at 05:05:11PM -0800, Leslie Choong wrote: > Hi Everyone, Just wanted to let everyone know that I've merged my RX > changes and Sanna Leidelof's TX path changes and updated the CGRAN > repository. You can check it out here: > https://www.cgran.org/browser/projects/ucla_zigbee_ph

[Discuss-gnuradio] UCLA Zigbee Phy Updated

2009-02-27 Thread Leslie Choong
Hi Everyone, Just wanted to let everyone know that I've merged my RX changes and Sanna Leidelof's TX path changes and updated the CGRAN repository. You can check it out here: https://www.cgran.org/browser/projects/ucla_zigbee_phy This project had demodulation and modulation code for 802.15.4 packe

Re: [Discuss-gnuradio] Maximum value of samples

2009-02-27 Thread Josh Blum
Sebastiaan Heunis wrote: Hi Does anyone have an idea as to what the maximum value of a sample when read in matlab is? I've got a BasicRx board and I'm injecting a 10dBm signal into RX-A. Using max(abs(sig)) in matlab results in 8.6458e+03. Is this what I should get, or should the maximum re

[Discuss-gnuradio] Re: Re: OpenBTS compilation error

2009-02-27 Thread T. W.
I have gnuradio-3.1.3. I grabbed the tarball, then followed the ./configure, make, make install process when I installed it. I can see the following four files in /usr/local/lib/ : -rwxr-xr-x 1 root root 938 2009-02-18 15:57 libusrp.la lrwxrwxrwx 1 root root16 2009-02-18 15:57 libu

Re: [Discuss-gnuradio] 1 fine slider Element and 1 rough slider Element to adjust ONE frequnecy

2009-02-27 Thread Josh Blum
I attached an example flow graph, take a look. This way may work better for you. -Josh feldmaus wrote: Hi All, i want to make 2 sliders depending on each other. Both schould adjust the same frequency. One Slider for the rough counts and the other one fo the fine counts. How to realize that ?

Re: [Discuss-gnuradio] Re: OpenBTS compilation error

2009-02-27 Thread Fabian
Do you have the latest trunk version of GNURadio installed correctly? Do you have the library libusrp? - Fabian Am 27.02.2009 um 19:55 schrieb T. W.: Martin, Thanks very much for your help! Your patch #1 seems to be already in the subversion repository. I manually applied your patch #2 to /

[Discuss-gnuradio] Example of Inband signaling

2009-02-27 Thread Yong J. Chang
Hi all, I'm studying on GNURadio and USRP with RFX2400. So far I was successfully able to make new signal blocks (e.g noncoherent FSK demodulator) with using benchmark_rx.py and benchmark_tx.py and it works fine. Now I'm interested in inband signaling. I want to know exact time of arrival of rec

[Discuss-gnuradio] Re: OpenBTS compilation error

2009-02-27 Thread T. W.
Martin, Thanks very much for your help! Your patch #1 seems to be already in the subversion repository. I manually applied your patch #2 to /Transceiver/USRPDevice.h. Now the following warning went away. >> ".deps/radioInterface.Tpo" -c >> .libs/radioInterface.o >> In file included from USRPDe

Re: [Discuss-gnuradio] How can I externally trigger USRP2?

2009-02-27 Thread Matt Ettus
Jakob Meineke wrote: Hi, in our lab we want to use a USRP2 to generate an RF-signal starting at a given time in our experimental sequence. While the generation of the signal works fine, in order to do this we need to be able to externally trigger the start of the sequence. We basically want to s

Re: [Discuss-gnuradio] preemph time constant

2009-02-27 Thread Josh Blum
This seems like a job for ~/.gnuradio/config.conf Dimitris Symeonidis wrote: the fm_preemph and fm_deemph functions in blks2impl/fm_emph.py take the argument tau (time constant), which is 75μsec for the US and 50μsec for Europe and the rest of the world. If now tau is given, the 75 is assumed by

Re: [Discuss-gnuradio] preemph time constant

2009-02-27 Thread John Ackermann N8UR
I don't recall the details, but I believe that (at least in the US) the preemph for WBFM (ie, FM broadcast) is different from that for NBFM (ie, 2-way) -- 250usec comes to mind. John Dimitris Symeonidis wrote: the fm_preemph and fm_deemph functions in blks2impl/fm_emph.py take the argume

[Discuss-gnuradio] preemph time constant

2009-02-27 Thread Dimitris Symeonidis
the fm_preemph and fm_deemph functions in blks2impl/fm_emph.py take the argument tau (time constant), which is 75μsec for the US and 50μsec for Europe and the rest of the world. If now tau is given, the 75 is assumed by default... Now, the wfm_rcv and wfm_rcv_pll of blks2 don't take a tau paramete

Re: [Discuss-gnuradio] Modifications in benchmark_rx.py for USRP2

2009-02-27 Thread Douglas Geiger
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Smith L. wrote: > Hi, > > I have been trying to use USRP2 as a receiver and USRP1 as a transmitter. > The benchmark_tx.py file is working well for USRP1 but I did some > modifications to benchmark_rx.py so that it can work on USRP2. But it didnt > wor

[Discuss-gnuradio] How can I externally trigger USRP2?

2009-02-27 Thread Jakob Meineke
Hi, in our lab we want to use a USRP2 to generate an RF-signal starting at a given time in our experimental sequence. While the generation of the signal works fine, in order to do this we need to be able to externally trigger the start of the sequence. We basically want to start the transmission o

[Discuss-gnuradio] 1 fine slider Element and 1 rough slider Element to adjust ONE frequnecy

2009-02-27 Thread feldmaus
Hi All, i want to make 2 sliders depending on each other. Both schould adjust the same frequency. One Slider for the rough counts and the other one fo the fine counts. How to realize that ? I tried this but without success. Here is a part of my code, ###

[Discuss-gnuradio] Maximum value of samples

2009-02-27 Thread Sebastiaan Heunis
Hi Does anyone have an idea as to what the maximum value of a sample when read in matlab is? I've got a BasicRx board and I'm injecting a 10dBm signal into RX-A. Using max(abs(sig)) in matlab results in 8.6458e+03. Is this what I should get, or should the maximum reading be higher? Also, can s

[Discuss-gnuradio] starting with usrp2_fft.py

2009-02-27 Thread jeff .
Hi, I'm a newbie. I received my hardware and trying test it. I started to test the USRP2 (last release of firmware) and FLEX900 with the "usrp2_fft.py". My system is Ubuntu 8.10 and the trunk version of gnuradio. I'm trying this command: #sudo usrp2_fft.py -f900M But the graphic window of "USRP

Re: [Discuss-gnuradio] unable to locate an audio module

2009-02-27 Thread Eustache
>You'll need to ensure that gr-audio-alsa got configured, built and installed. I get the same error message but I don't know how configure built and install gr-audio-alsa. Could you help a newby please. I have ubuntu hardy heron on vmware. I've used synaptic packet manager to get gnuradio (I do

[Discuss-gnuradio] Academic paper using USRP

2009-02-27 Thread Per Zetterberg
In this paper we investigate I/Q Imbalance on the RFX1800 with USRP. The paper is available at: http://www.ee.kth.se/php/modules/publications/reports/2009/IR-EE-SB_2009_015 .pdf @Article{IR-EE-SB_2009:015, author = {Peter H{\"a}ndel and Per Zetterberg}, title = {Receiver I/Q Imbalance: Tone Tes

Re: [Discuss-gnuradio] Details on USB buffer

2009-02-27 Thread Stefan Bruens
On Friday 27 February 2009 01:05:52 Tony wrote: > The USRP C++ example program uses this code to move USRP USB data into a > buffer: > >   urx->read(&buf, bufsize, &overrun); > > If this line is called many times in a short period of time will the buffer > have some of the data leftover from pr

Re: [Discuss-gnuradio] Details on USB buffer

2009-02-27 Thread Eric Blossom
On Thu, Feb 26, 2009 at 04:05:52PM -0800, Tony wrote: > The USRP C++ example program uses this code to move USRP USB data into a > buffer: > >   urx->read(&buf, bufsize, &overrun); > > If this line is called many times in a short period of time will the > buffer have some of the data leftov