[Discuss-gnuradio] Re: [OMG] Cox DVR

2011-03-14 Thread Jason Uher
On Mon, Mar 14, 2011 at 12:10 AM, Nathan Schulte nmschu...@gmail.com wrote: Jason Uher wrote: Mike, if you follow Jason's advice, your DVR is going to end up looking something like this: http://hackaday.com/2011/03/13/reverse-engineering-the-psp/ Suddenly, all the effort I put into high

Re: [Discuss-gnuradio] Save all the samples of a packet (all complex values) and demodulate at once. (Is it possible?)

2011-03-02 Thread Jason Uher
On Wed, Mar 2, 2011 at 6:00 AM, Minsuk Kang minsuk.k...@itc.kaist.ac.kr wrote: Dear all, We're using benchmark_tx(rx) apps to implement a simple cellular-like network. In the benchmark_rx example, the demodulator demodulates some amount of symbols at a time and the correlator and the framer,

Re: [Discuss-gnuradio] re: Low cost hardware option, the total GNUsolution

2011-01-17 Thread Jason Uher
On Mon, Jan 17, 2011 at 8:19 AM, Patrik Tast pat...@poes-weather.com wrote: A comment from Jerry Martes, HAM amateurs spend lots more $$ than the cost of a USRP just to get things a monkey could build.   From what I have observed, there are thousands more amateurs who buy components that

Re: [Discuss-gnuradio] How to bypass the ISM band filter on the RFX900?

2010-08-17 Thread Jason Uher
http://www.google.com/search?q=inurl%3Adiscuss-gnuradio+disable+ism+filter The filter affects both TX and RX, but not the auxiliary RX path (RX2). If you just want to receive, use the 2nd SMA port and make sure to set that in the software. If you want to bypass the filter for transmit, you will

Re: [Discuss-gnuradio] USRP, GNU Radio on Windows

2010-08-05 Thread Jason Uher
   thank you for the reply, I updated the GNU Radio to version 3.3.0, but there is not working. If I want to start a script by double clicking the cmd line window is opened and closed and nothing happens. The USB driver is installed, everything seems to be OK but it's not. Florian. Open an

Re: [Discuss-gnuradio] Can one USRP be connected with multiple GNU Radio?

2010-08-05 Thread Jason Uher
Can one USRP connected with multiple PCs, each of PC runs a GNU Radio, so as to formulate a distributed system? This is doubtful with a USRP1, due to the fact that USB is a host/client protocol. It is /maybe/ possible with the USRP2's network interface, but writing the code for sample

Re: [Discuss-gnuradio] what does the corresponds to DC in the IFmean?

2010-08-05 Thread Jason Uher
2010/8/5 intermilan tianxia...@hotmail.com: hi all:   I recently see the corresponds to DC in the IF in the function set_freq() of the db_basic.cc.so what does this  sentence mean? In other word, I want to know what is the function of the parameter baseband_freq in the set_freq().I hope

Re: [Discuss-gnuradio] Using GNU Radio without actual hardware and simulated inputs

2010-06-18 Thread Jason Uher
On Fri, Jun 18, 2010 at 1:11 PM, Jeffrey Lambert je...@k1vzx.com wrote: On 6/18/2010 12:37 PM, Elvis Dowson wrote: Hi,         Is it possible to simulate the RF signal input part using a digitized waveform file, and use GNU Radio to process the signal? Yes.  There are also built in functions

Re: [Discuss-gnuradio] DQPSK Modulation/Demodulation issue

2010-04-28 Thread Jason Uher
On Wed, Apr 28, 2010 at 12:30 AM, marcin_w mwie9...@uni.sydney.edu.au wrote: Sorry about the code, it was generated mostly via Grc. I've cleaned it up, should make much more sense now: http://users.tpg.com.au/marcinw//qpskTest.py I've tried using the available DQPSK blocks as you suggested,

Re: [Discuss-gnuradio] Failed to checkout older version GNURadio: inband-...@8298.

2010-04-27 Thread Jason Uher
Unfortunately, I failed to checkout this version with the following message: svn: Server sent unexpected return value (405 Method Not Allowed) in response to PROPFIND request for '/svn/gnuradio/branches/features/inband-usb' The gnuradio repository has switched to using GIT for version

Re: [Discuss-gnuradio] about usrp daughterboard

2010-04-27 Thread Jason Uher
  Recently I have been testing the examples of Gnu Radio. And I came across some problems. When I use a USRP with two daughterboards, I found that the two daughterboards can not trismit or receive at the same time. They can only work as one transmitter and one receiver. I want to know whether

Re: [Discuss-gnuradio] about usrp daughterboard

2010-04-27 Thread Jason Uher
I thought there was an example for generic cards around but I can't seem to find it, maybe someone else knows where it is? This is a quick example derived from some code I use when I want to just capture random data for post processing.

Re: [Discuss-gnuradio] DQPSK Modulation/Demodulation issue

2010-04-27 Thread Jason Uher
On Tue, Apr 27, 2010 at 11:49 AM, marcin_w mwie9...@uni.sydney.edu.au wrote: Hi All, I have been battling with this for the last week and still have not found a solution. I've include some more info for anyone who can help.   Does anyone have any idea what is going wrong here?   I've

Re: [Discuss-gnuradio] BPSK GNU radio companion/USRP help!

2010-04-26 Thread Jason Uher
Our program does not seem to be working. Please need any type of thought if possible! First, please see this article on how to appropriately ask questions of the mailing list: http://gnuradio.org/redmine/wiki/gnuradio/ReportingErrors Specifically the part titled How should I format my

Re: [Discuss-gnuradio] DPSK Modulator and Demodulator

2010-04-22 Thread Jason Uher
Hi, I am having trouble the the DBPSK mod and demod blocks. My flow graph is: file source - DBPSKmod - DBPSKdemod - file sink If anyone knows why the output file of the whole graph would be 13 bytes or if I am missing something please let me know. Thanks, Dave On Wed, Apr 21, 2010 at

Re: [Discuss-gnuradio] Sinks in GRC

2010-04-15 Thread Jason Uher
On Thu, Apr 15, 2010 at 4:34 AM, Umair Naeem ar...@student.chalmers.se wrote: How can I use/import 'ra_stripchartsink' and 'ra_fftsink' in GRC ? They are not available in available sinks in GRC. If you have a working gnuradio module that you would like to add to GRC you can create an XML file

Re: [Discuss-gnuradio] How to get the content of EEPROM on mother board (boot issue)

2010-04-13 Thread Jason Uher
2010/4/13 Liang Xin 梁昕 liangxin...@gmail.com: Hi All I am now developing a board like USRP, also using gnuradio, but add some surroundings. The issue now is as below. I have changed the VID and PID in EEPROM on mother board to FFFE/0002, which is the same as usrp. And in the instrument

Re: [Discuss-gnuradio] Re: About EEPROM and FX2(68013a) USB interface in USRP

2010-04-13 Thread Jason Uher
On Tue, Apr 13, 2010 at 4:06 PM, Eric Blossom e...@comsec.com wrote: On Tue, Apr 13, 2010 at 03:32:49PM -0400, Catalin Patulea wrote: On Mon, Apr 12, 2010 at 12:00 PM,  discuss-gnuradio-requ...@gnu.org wrote: Date: Mon, 12 Apr 2010 16:02:43 +0800 From: =?GB2312?B?TGlhbmcgWGluIMG66r8=?=

[Discuss-gnuradio] Why no phase ambiguity in digital-bert...

2010-04-13 Thread Jason Uher
I notice in the digital-bert example (benchmark_rx.py and receive_path.py), the Costas loop actually occurs prior to the MM sampler, without being wrapped inside the mpsk_receiver: (lines 104-105 of http://gnuradio.org/cgit/gnuradio.git/tree/gnuradio-examples/python/digi

[Discuss-gnuradio] benchmark_rx/tx.py

2010-04-05 Thread Jason Uher
On Sun, Apr 4, 2010 at 7:40 AM, Merve Deniz mdeni...@yahoo.com wrote:   Hi,   I am trying to do DBPSK modulation/demodulation using USRP1 and RFX1800. I run benchmark_tx at the transmitter side and rx at the receiver side. It worked great but I could not understand what packages I sent. So I

Re: [Discuss-gnuradio] a problem about USRP

2010-03-22 Thread Jason Uher
terminate called after throwing an instance of 'std::runtime_error'   what():  No suitable daughterboard found! a) Which daughterboard do you have installed, and which side is it on (A or B) b) What does usrp_print_db.py return? Jason ___

Re: [Discuss-gnuradio] Daughterboard

2010-03-04 Thread Jason Uher
On Thu, Mar 4, 2010 at 12:48 PM, Brook Lin gnu.f...@yahoo.com wrote: Hi All, When we use any of the USRP daughterboard to transmit, do we need the authorization? For example, FRX900 includes the cell phone bands in US. If we use FRX900 to transmit, do we violate the FCC rule? Or, we could

Re: [Discuss-gnuradio] BPSK to QPSK

2010-03-03 Thread Jason Uher
Hum... I'm glad to hear that, although I thought that the pi- phase ambiguity of Costas- loops made them unsuitable for QPSK- constellations... But I guess there is something I'm missing in the code then? You aren't missing anything, you just need to account for the possible rotation. The

Re: [Discuss-gnuradio] complex data after modulation

2010-03-01 Thread Jason Uher
benchmark_tx and benchmark_rx files. A step towards my goal is the use of complex data achieved after modulation in the form of X+Yj in real time. I want the received complex data from the channel filter block to be processed (mathematical operations) and then passed on to packet reciever in

Re: [Discuss-gnuradio] Running benchmark_rx.py in debugging mode

2010-02-22 Thread Jason Uher
On Mon, Feb 22, 2010 at 3:55 AM, amarnath alapati amarnath.alap...@gmail.com wrote: hi everyone,            Is there any way for me to run the benchmark_tx and benchmark_rx.py files in debugging mode so that I can see the entire flow structure? I am curious to know the steps that take place

Re: [Discuss-gnuradio] problem using octave

2010-02-21 Thread Jason Uher
2010/2/21 ahsan liaqat ahsanlia...@hotmail.com: hi, i installed octave recently, and following the instructions on gnuradio.org i did following : octave:1 addpath(/home/ahsan/gnuradio/gnuradio-core/src/utils/) warning: addpath: Doesme/ahsan/gnuradio/gnuradio-core/src/utils/: No such file

Re: [Discuss-gnuradio] A strange question involving costas loop

2010-02-04 Thread Jason Uher
On Thu, Feb 4, 2010 at 4:37 PM, Mir M. Ali mirmurt...@gmail.com wrote: In GRC I have a complex sine source with amplitude 10 and frequency 2000Hz sampled at 4000Hz as a input to the costas loop through a throttle block. The max and min frequency used is +/- 0.157rad/sample which is 100Hz

Re: [Discuss-gnuradio] problem in executing benchmark_tx.py

2010-02-01 Thread Jason Uher
On Mon, Feb 1, 2010 at 5:22 AM, ashwini ashw...@adtl.co.in wrote: Can anyone tell me what is wrong in my approach, (why junk data is getting written) and how to resolve this issue. We need more information on your set up to get an idea of what might be going wrong

[Discuss-gnuradio] Problems with scope sink

2010-02-01 Thread Jason Uher
Using the latest git checkout of gnuradio (and an older svn one, not sure of the rev #), the scope sink will only show a single channel of input. If I use the float sink, only the first channel show up. If I use the complex sink, only the real part of the first channel shows up. I have verified

Re: [Discuss-gnuradio] GRC: sending IQ samples of square is resulting with lot of noise.

2010-01-27 Thread Jason Uher
On Wed, Jan 27, 2010 at 3:31 AM, srinivas naga vutukuri srinivas.vutuk...@gmail.com wrote: Am sending a +1 to -1 amplitude square wave samples from Tx and when i capture on Rx end its not almost a square wave. I have generated the above I believe this is the maximum output power for the USRP2,

Re: [Discuss-gnuradio] permission to access /usr/local

2010-01-21 Thread Jason Uher
On Thu, Jan 21, 2010 at 4:33 AM, Mattias Kjellsson m...@kth.se wrote: However, I was wondering if there is any other way to run applications with USRP without stating as sudo everytime? Thank you! You will need to give yourself permission to access the device (using group permissions)

Re: [Discuss-gnuradio] gnuradio on iphone?

2009-12-11 Thread Jason Uher
Hey, Could it be possible to install gnuradio on smarphones or iphone (v1 to v3) -maybe a minimal version- in order to get working the usrp (or a minimal harware) with it? When I checked (when v1 came out), the iPhone did not have USB host functionality. That would be a deal killer right

[Discuss-gnuradio] GNUradio debugging and stepping

2009-12-03 Thread Jason Uher
All, I was wondering if there was a simple method that allows someone to step through a gnuradio flow graph like you might when using a debugger. I have tried using gdb, but the swig/python stuff gives a whole lot of clutter. I'm not even sure it's possible given the way the gnuradio handles

Re: [Discuss-gnuradio] how to reduce data rate in OFDM

2009-09-30 Thread Jason Uher
correctly. One possible reason maybe because the host can't catch up the process speed. So, I would like to modify some paramters and reduce the process burden on the cpu side. I noticed the bandwidth can be reduce by A few questions: 1) What radio hardware are you using? 2) What PC hardware

Re: [Discuss-gnuradio] can usrp_rx_cfile.py be used to collect ofdm signal?

2009-09-30 Thread Jason Uher
    Does anyone know if use 'usrp_rx_cfile.py' to collect ofdm signal will be any problem? In other words, after collection, is it possible to decode these signals? 'usrp_rx_cfile.py' will collect everything the USRP sees into a file that can be played back later. If you are currently

Re: [Discuss-gnuradio] SDR problem solved!

2009-09-30 Thread Jason Uher
On Wed, Sep 30, 2009 at 3:34 PM, Philip Balister phi...@balister.org wrote: http://www.semiaccurate.com/2009/09/23/crestatech-ships-software-defined-radio/ OK, maybe not. But I think the part might still be interesting if we can sift through the marketing nonsense, and the documentation is

Re: [Discuss-gnuradio] MIMO + USRP

2009-09-03 Thread Jason Uher
I'm pretty sure several people have published MIMO investigations using the usrp. I recently presented one that is probably not in the IEEE archives yet at ISCTA2009 using the USRP to demonstrate the feasibility of polarization coding. Searching google scholar for usrp has worked well for me in

Re: [Discuss-gnuradio] Hello

2009-08-10 Thread Jason Uher
On Mon, Aug 10, 2009 at 3:26 AM, Daniel Ampemdanb...@gmail.com wrote: well any help on how to modify the code to hear an audio output (what do l have to change) will be appreciated. from my attempt l get the same output I think you misunderstood my last email, if you want to know where your

Re: [Discuss-gnuradio] OS X Configure script error

2009-08-07 Thread Jason Uher
checking whether we are using the GNU Fortran 77 compiler... (cached) no I'm about 90% sure that the check for python.h uses a fortran script, and configure fails when the fortran fails. If you don't have fortran that my be why that step is failing. Check your config.log for errors pertaining

Re: [Discuss-gnuradio] OSX only MacPorts Working Again

2009-08-03 Thread Jason Uher
On Mon, Aug 3, 2009 at 9:15 AM, Michael Dickensm...@alum.mit.edu wrote: For those of you running GNU Radio on OSX using MacPorts, the good news is that MacPorts once again supports the correct version of LIBUSB (legacy, 0.1.12) for the USRP component, via the port 'libusb-legacy' -- and so once

Re: [Discuss-gnuradio] Hello

2009-07-30 Thread Jason Uher
Using d'board:  B: Flex 2400 Tx MIMO B ktadm...@b3002-softradio:~/Desktop/new$ ./Fmstereo.py USRP Serial:  49e50652 Using d'board:  B: Flex 2400 Tx MIMO B ktadm...@b3002-softradio:~/Desktop/new$ what could  be the result of this? and how can l correct this. First, please see

Re: [Discuss-gnuradio] Hello

2009-07-29 Thread Jason Uher
On Wed, Jul 29, 2009 at 4:40 AM, Daniel Ampemdanb...@gmail.com wrote:   File ./Fmstereo.py, line 25     from gnuradio import gr, usrp, blks2     ^ IndentationError: unexpected indent Python parses your code based on the indentation so it doesn't have to use brackets to separate logical

Re: [Discuss-gnuradio] Audio under-runs on dial_tone.py (even when using plughw:0, 0)

2009-07-28 Thread Jason Uher
What's the host OS? OS X 10.5.7 I had absolutely no luck getting any kind of decent performance with parallels or VMware when using gnuradio/ubuntu VMs under os x(10.4). I haven't tried tried since I got my new laptop, but if you are set on using your mac machine as a development box then I

Re: [Discuss-gnuradio] regarding error : usrp_open_interface:usb_claim_interface: failed interface 2

2009-07-28 Thread Jason Uher
On Tue, Jul 28, 2009 at 6:46 AM, Sheshanandan KNknsheshanan...@gmail.com wrote: hi all, I am working on the gnuradio 3.2 stable release. When I execute my python script, I am getting the following error.  I am not getting the reason for this. If any one of you know about this, please let me

Re: [Discuss-gnuradio] Any idea what can make a usrp stop working?

2009-07-28 Thread Jason Uher
On Tue, Jul 28, 2009 at 5:53 PM, Jonathan Coveneyjcove...@gmail.com wrote: OSX. I got my USRP up and running, and now it isn't. In system profile it usb_control_msg failed: usb_control_msg(DeviceRequestTO): pipe is stalled fusb_ephandle_darwin::read_completed: Expected 32768 bytes; read 0.

Re: [Discuss-gnuradio] USB transfers speeds with USRP 1

2009-07-27 Thread Jason Uher
Now, the funny thing is that when I run test_usrp_standard_rx in /usrp/host/apps using sudo ./test_usrp_standard_rx -D 8 -M 900, I get noverruns=0.  So with my PC and USRP I can actually get a transfer rate of 32MB/s which leads me to believe that something in the setup of my application

Re: [Discuss-gnuradio] Help with GRC

2009-07-26 Thread Jason Uher
in order to see my reconstructed sine wave?  I connected a scope sink at the output of the demodulator where I was able to see a waveform between 0 and 1, but I actually need to see the original sine wave. What sine wave are you transmitting? I'll assume you have connected a 'signal_source'

Re: [Discuss-gnuradio] Accessing nasty elements of 'payload' in benchmark_rx.py

2009-07-26 Thread Jason Uher
It seems to be a binary-stream and I am transmitting a packet with just 0's and 1's. I have tried writing payload to both, .txt and .bin files and output contains wierd characters. (Ofcourse, writing .txt file required me use repr() ). First of all, what you want done may have already been

Re: [Discuss-gnuradio] Clarification on FM/AM implementation

2009-07-24 Thread Jason Uher
I need a basic signal to be modulated over FM and use that FM modulated signal as a base band for AM modulation, which will be finally sent to USRP. I was trying to use blks2.nbfm_tx / blks2.wfm_tx. But in both the functions, I can specify only the peak deviation but not the center frequency.

Re: [Discuss-gnuradio] Re: Re: Re: Please help me out with udp_sink

2009-07-24 Thread Jason Uher
On Fri, Jul 24, 2009 at 12:01 AM, Yc Parkli...@ruby-forum.com wrote: Thanks to everybody. Now I know how to make connections. Though slow, I feel that I'm moving forward. No problem, good job getting your first project going. Jason ___

[Discuss-gnuradio] Re: Compiling on OSX 10.5

2009-07-23 Thread Jason Uher
The first problem I have is that macports installs libusb as libusb-1.0; meaning that I get the following output from configure: I was told this is solved by installing the macports package libusb-compat, it makes libusb-1.0 backwards compatible (and compiling went great!) Now there is an

Re: [Discuss-gnuradio] collecting waveform data

2009-07-22 Thread Jason Uher
I hope to save the waveform of baseband. Now I use the file sink of the GRC to save the waveform data, but I am not sure which type of file we can save, .txt or .csv? Or some other type of file? We tried .txt and  .csv, but some part of the file is messy code. Can you give me a example for

Re: [Discuss-gnuradio] Please help me out with udp_sink

2009-07-22 Thread Jason Uher
but the (signal source - UDP sink) reports 'connection refused' error for both cases(UDP and TCP). I would say that there is no one listening at whatever ip:port you are trying to send data to. Make sure that there is some sort of daemon responding to requests there. Jason

Re: [Discuss-gnuradio] Re: Please help me out with udp_sink

2009-07-22 Thread Jason Uher
Thanks to your comment, I don't have that error. ece$ python ./from_udp.py gr_block_executor: source gr_block udp_source (3) returned 0 from work.  We're marking it DONE. I'm pretty sure the 'were marking it DONE' only comes up when a source fails, and then it is killed by the controller. So

Re: [Discuss-gnuradio] very bizarre antenna function

2009-07-22 Thread Jason Uher
Why would this be? I'm sort of flying by the seat of my pants when it comes to attaching the antenna (it's just your basic black hinged one). Are there any instructions or diagrams that show how it should be attached and positioned? And why would placing it near things help some come clearer?

Re: [Discuss-gnuradio] May I get 2 receivers on same channel by one USRP2?

2009-07-21 Thread Jason Uher
Please look in gnuradio-examples/python/multi-antenna.  Those examples work with 4 antennas using 2 Basic RX's.  Your case is a subset of what those examples demonstrate. Don't all of the multi-antenna files require a specific FPGA build (ie, unique to the USRP1) to get two real signals from a

Re: [Discuss-gnuradio] Re: Discuss-gnuradio Digest, Vol 80, Issue 19

2009-07-20 Thread Jason Uher
On Mon, Jul 20, 2009 at 6:02 AM, Daniel Robinsondanb...@gmail.com wrote: l want to ask is it possible to transmit fm using RFX2400 on USRP board. First of all, please read the guidelines for posting on the list: http://gnuradio.org/trac/wiki/ReportingErrors . Mainly those regarding top-posting

Re: [Discuss-gnuradio] Re: new to GNU radio

2009-07-20 Thread Jason Uher
I too am a new user of the USRP and continuing on this topic, id like to be able to display the symbol mapping done by the benchmark codes. Some starting guidance would extremely helpful. I have been informed of the matlib package which is available to produce matlab like plots, is this a way

Re: [Discuss-gnuradio] Having a higher samples per symbol (greater than 7) with lower bitrate

2009-07-12 Thread Jason Uher
= the maximum samples per symbol value that benchmark_tx has is 7. What happens if I change it to a higher value and reduce the bitrate such that the usrp constraints are still met. I read somewhere that having a sample per symbol value greater than 7 is impractical. Why? From a strictly 'seat

Re: [Discuss-gnuradio] (no subject)

2009-07-07 Thread Jason Uher
 I haven't receive my USRP yet so i am trying to make some simple, USRP independenent applications. I want to implment FSK modulator by transfering a signal between two laptops using the sound card ,the problem is  i get syntax error when using the You'd probably be better off using the

Re: [Discuss-gnuradio] 2 RX and 1 TX channel

2009-07-06 Thread Jason Uher
I think that you have the de-interleaving and the mux set up correctly provided you are using a complex source, but there may be other problems with your set up that I'm not aware of with regards to those problems. I think one problem might be your use of a vector sink as a receiver, usually the

Re: [Discuss-gnuradio] Measurement Computing DAC and USRP on the same programming language in Windows.

2009-07-06 Thread Jason Uher
On Mon, Jul 6, 2009 at 10:58 AM, Eric Blossome...@comsec.com wrote: On Sat, Jul 04, 2009 at 02:43:10PM +1000, Shabbir Ahmed wrote: Dear all: I need to run Measurement Computing DAC in parallel to GNURADIO/USRP. The DAC feeds to a variable gain aplifier. I want to use the USRP as a receiver

Re: [Discuss-gnuradio] How to decipher raw output of USRP to a file?

2009-07-05 Thread Jason Uher
http://gnuradio.org/trac/browser/gnuradio/trunk/usrp/host/apps/test_usrp_standard_rx.cc. The program seems to run as intended and outputs the data to a file I specify with -o. However, when I open the file it is binary and I don't understand how the file is structured. I would like to take the

Re: [Discuss-gnuradio] RFX-1800 Tranciever

2009-07-01 Thread Jason Uher
Is it possible to run benchmark_tx and benchmark_rx on same computer with one USRP with RFX-1800 Transciever daughter board. I believe if you have two daughter cards it is possible to run the benchmark_*x scripts on the same USRP but different daughtercards, but I think you need to combine

RE: [Discuss-gnuradio] Software Radio development environment

2009-07-01 Thread Jason Uher
   where can we found the GNURADIO development environment that is similar to SIMULINK? It's called GRC, and it's included in the trunk in the newer releases. Please see http://www.joshknows.com/grc for more information Jason ___ Discuss-gnuradio

Re: [Discuss-gnuradio] RFX-1800 Tranciever

2009-07-01 Thread Jason Uher
I believe if you have two daughter cards it is possible to run the benchmark_*x scripts on the same USRP but different daughtercards, but I think you need to combine them into a single flow graph. If I You can't run benchmark_tx and _rx using one USRP and two daughtercards.  The two sides

Re: [Discuss-gnuradio] Problems with installing GnuRadio

2009-06-27 Thread Jason Uher
When I wanted to start find_usrps -e eth1 (in 'apps'), he didn´t find the usrp2. I also tried to update the firmware, but he didn´t know the u2_flash_tool command (there is also no u2_flash_tool file in 'firmware'). Does the dial tone example in the 'audio' folder work? When you run it you

Re: [Discuss-gnuradio] USRP2

2009-06-26 Thread Jason Uher
which software for programming and compiler. Do you have document about how to make simple software for testing. These are a good place to start getting to know gunradio and the USRP, most of the examples deal with the USRP1, but it should be fairly simple to transform them using the examples

Re: [Discuss-gnuradio] Changing frequency dynamically in benchmark_rx.py

2009-06-26 Thread Jason Uher
I tried to locate the simple framer, but not able to find it. Greping for it takes me to the c code of gr_simple_framer but I am not able to make much sense of it. Can you please elaborate a bit more...? Where does the correlations takes place within the python code. The framer sink is a

Re: [Discuss-gnuradio] Changing frequency dynamically in benchmark_rx.py

2009-06-20 Thread Jason Uher
would like to know where is this happening in the code? tb.wait() is called, but i don't see the code in wait() function which actually senses if a transmission is being carried out on the specified frequence or not? Can someone please help me locate the transmission sensing code in

Re: [Discuss-gnuradio] parallel data reception

2009-06-17 Thread Jason Uher
usrp_dual_source want antennas which should be used as input parameters, as follows (I copied this line from a question posted on a thread which was using LFRX daughter cards) self.usrp_dual_source_x_0 = grc_usrp.dual_source_c(which=0, side_a='A', rx_ant_a='RXA', side_b='A', rx_ant_b='RXB')

Re: [Discuss-gnuradio] parallel data reception

2009-06-16 Thread Jason Uher
I am using USRP1 + RFX2400. You know there are two antenna ports on RFX2400 daughter card those are RX2, TX/RX. Is it possible to use both these ports in parallel for data reception. If yes then pelase provide me little clue how I should do it, or may be refer me to some existing example.

Re: [Discuss-gnuradio] New to gnuradio - Complex sampling question - urgent

2009-06-12 Thread Jason Uher
On Fri, Jun 12, 2009 at 6:30 AM, Peng Huopenggnura...@gmail.com wrote: Hi, I am new to Gnuradio. I have a question about complex sampling. Does complex sampling in gnuradio mean that the Real signal is coverted to its Inphase and Quadrature components or is it that two different signals are

Re: [Discuss-gnuradio] max amplitude detector

2009-06-09 Thread Jason Uher
Is there a function that simply looks at a steam of data and returns the maximum value for amplitude within a certain number of samples?   I looked at gr_peak_detector, but it expects the peak parameters and returns true or false, not exactly what i need. This should be fairly easy to

Re: [Discuss-gnuradio] Why d_phase in Costas loop different in gr_costas_loop from gr_mpsk_receiver?

2009-05-27 Thread Jason Uher
Why is the d_phase equation different in these two files? d_phase += d_alpha*phase_error; // In gr_mpsk_receiver.cc and d_phase = d_phase + d_freq + d_alpha * error; // In gr_costas_loop.cc The d_freq term is omitted and I don't understand why. gr_costas_loop is wrong, and gr_mpsk_receiver

Re: [Discuss-gnuradio] Why d_phase in Costas loop different in gr_costas_loop from gr_mpsk_receiver?

2009-05-27 Thread Jason Uher
gr_costas_loop is wrong, and gr_mpsk_receiver used to have the same error and has since been updated.  The frequency component of the rotation has already been added to the current phase estimate during de-rotation of of the samples (in mm_sample, I think); so here all we have to do is update

Re: [Discuss-gnuradio] Python error USRP question

2009-05-27 Thread Jason Uher
Your question is fairly generic. Please see http://gnuradio.org/trac/wiki/ReportingErrors for some guidelines on the best way to ask you question in a manner that will allow us to help you solve it. Thanks Jason ___ Discuss-gnuradio mailing list

Re: [Discuss-gnuradio] Continuous Stream Reading off of the usrp_rx_cfile.py capture possible?

2009-05-27 Thread Jason Uher
I have one question regarding the samples captured using usrp_rx_cfile.py at the receiver. Is there anyway that I let the usrp_rx_cfile.py run forever, and it will keep on capturing samples through USRP forever, while I keep on taking out 10K samples (lets say) at a time from that continuous

Re: [Discuss-gnuradio] Range of samples values

2009-05-26 Thread Jason Uher
On Tue, May 26, 2009 at 1:24 AM, Ujala Qasim ujala.qa...@gmail.com wrote: I set my decimation rate to 200 and center_freq to 100.1, but the values of my samples is exceeding this range. Please specify the mistake that I'd be making... This is very hard to do without any information at all

Re: [Discuss-gnuradio] usrp_source to file_sink ... what gets written when no transmission

2009-05-20 Thread Jason Uher
I don't understand why is it that the usrp_source writes some junk data to the file_sink even when I am not transmitting from the other USRP. Is it possible that it might be picking up some stray signals at 2.4GHz? The USRP receiver has no idea when the transmitter is sending, all it does it

[Discuss-gnuradio] problem with 'make install' on latest trunk

2009-05-20 Thread Jason Uher
I think there might be a very small problem with the make install in the latest trunk: it doesn't seem to copy the all the files appropriately. if I do a straight up 'make install' the benchmark_*x.py examples fail with: ImportError: No module named usrp_options It's easily solved by copying

Re: [Discuss-gnuradio] Using a USRP as a PID feeback controller

2009-05-19 Thread Jason Uher
Despite this seeming like a killer app, I haven't really found much discussion of it in this list's archives or on the gnuradio wiki. So I'm mentioning the idea in public, for future mailing list archive searchers. If, at some point, my FPGA code reaches a level of maturity where am I not too

Re: [Discuss-gnuradio] half USRP

2009-05-18 Thread Jason Uher
have you ever think about a simplified USRP, or 1/2 USRP, having only 1 side TX and RX? How about a 64 x USRP? It would be cool if there was a USRP that had many receiver channels, and it would also have a simple beam-former built into the FPGA. All of the schematics for the USRP and

Re: [Discuss-gnuradio] USRP emulation ??

2009-05-15 Thread Jason Uher
In my opinion, this is a really good idea. We're actually working on this as part of a bigger simulation project, which abstracts the USRP and the wireless channel. It not far along yet, but we'll put it on CGRAN once there is something to share. Can't wait! I've been thinking about

Re: [Discuss-gnuradio] Can we use any sampling rate in tunnel.py or benchmark_tx.py

2009-05-15 Thread Jason Uher
If yes, then can I just use the -S samplingrate option while running the program or is there anything more that I need to consider. benchmark_*.py files use an included set of functions called 'pick_bitrate' that will attempt to automatically decide correct parameters given the ones you

Re: [Discuss-gnuradio] save date and value to an rotating file

2009-05-14 Thread Jason Uher
And i still read in the thread Suitable Sink required something about gr.message_sink and gr.msg_queues. Both are written in c++, not python, further on gr.message_sink is a sink and can not connected to another sink. Is the gr.msg_queues a sink and source ? message_sink, message_source, and

Re: [Discuss-gnuradio] How to control the transmit power of USRP 1, rx2400 daughter board?

2009-05-14 Thread Jason Uher
I want to make a experiment by generating interferer using Benckmark_tx.py on RX2400 daughter board. I am confused when I want to control the transmit power. How can I control the power. With set_gain(), I see no difference. If I remember correctly the RFX boards do not have controllable

Re: [Discuss-gnuradio] dbpsk modulation

2009-05-14 Thread Jason Uher
modulator, given a desired bit rate and carrier frequency?  I can't seem to figure out how excess_bw and samples_per_symbol affect the parameters I ultimately want to set (bit rate and carrier freq). I would examine the 'pick_bitrate.py' file in the digital examples in detail. This file shows

Re: [Discuss-gnuradio] [BBN_USRP2] Barker (de)spreading

2009-05-14 Thread Jason Uher
are using a raised cosin as the TX/RX filter.  Perhaps you can swap out that filter with the barker filter to test if the bits are being decoded correctly. You will still need the RRC filter after barker coding. You can't really send direct plus/minus one data to the USRP because you can't

Re: [Discuss-gnuradio] multiband FM transmission reception problem

2009-05-13 Thread Jason Uher
Please don't spam the list, the people who know the most about gnuradio and the usrp, for the most part, have other full time jobs and provide help on this list as a courtesy. A response time of several days is not unreasonable in such situations. With that in mind, the reason you may not get a

Re: [Discuss-gnuradio] 1.6MHz to 30MHz

2009-05-12 Thread Jason Uher
The other question I have is whether it is possible to have a mini-usrp board that can be moulded into a somewhat handheld device size? In the anything's possible department, it's possible. If you only needed one daughtercard this would be very do-able, we looked into leaving off the second

Re: [Discuss-gnuradio] Intermediate frequency question

2009-05-12 Thread Jason Uher
If I am using RFX2400 then what is the IF frequency and can we change this to some other value? Correct me if the question I asked is wrong. With the RFX2400, and most of the high frequency usrp daughtercards, there is no IF frequency. The samples you receive (or send) from the usrp.source_x

Re: [Discuss-gnuradio] a running problem with the USRP, i am confused!

2009-05-08 Thread Jason Uher
Does it mean USRP could not keep on running for a long time or the USRP boards we are using have been broken? I do not know the reason for this problem. Please let me know what's wrong with the USRP. Thanks a lot! I believe there is an issue with the costas loop implementation in one of the

Re: [Discuss-gnuradio] The Debian directory

2009-05-08 Thread Jason Uher
directory.  Since I'm running a debian machine is there something I need to do with this directory or is simply running the commands: http://gnuradio.org/trac/wiki/DebianInstall ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org

Re: [Discuss-gnuradio] The Debian directory

2009-05-08 Thread Jason Uher
OK ... I have read that web page.  The problem is that all of the wiki information seems to be relevant to GNU Radio 3.0.2 and we are now on 3.2.x.  It doesn't appear to me that any of those targets exist in the Hmmm, I'm not really sure if there is any distro specific install information

Re: [Discuss-gnuradio] BPSK Demodulator (i.e. Receiver) Award/Challenge

2009-05-06 Thread Jason Uher
I seriously doubt that making a regular BPSK receiver that goes all-the-way, i.e. recovers the transmitted data has ever been done. We haven't found any trace of anything be it commercial, research or DIY. Have you looked at the examples in the 'digital' folder? The benchmark_rx and

Re: [Discuss-gnuradio] OS X input troubled

2009-04-30 Thread Jason Uher
The problem I have is with audio input. Output is working fine (dial_tone.py is wowking), but when I try to use audio input, I get: 2009/4/30 Michael Dickens m...@alum.mit.edu: code; I haven't looked at it or updated it in a long time.  I can't look into this issue today, but I will

Re: [Discuss-gnuradio] Repeating vector source with delay

2009-04-16 Thread Jason Uher
Is there an easy way to get a vector source to pass on the same signal over and over again, but with a fixed delay between each transmission? 'good practices' option: Look at the benchmark_*x.py examples, if you drill down into the packet manager you will find an example of a source block that

Re: [Discuss-gnuradio] Repeating vector source with delay

2009-04-16 Thread Jason Uher
Thank you Jason. I will attempt the good practice-way first then :) Not to discourage you from doing things the hard way, but it's really only necessary if this project is an implementation type of thing. If all you need is some experimental data for a class project or paper, then the fast way

Re: [Discuss-gnuradio] QPSK basic modulator

2009-04-08 Thread Jason Uher
I checked the benchmark_tx.py it adds a preamble and a lot of data before the actual payload which I don't need. I assume you are trying to do some BER measurements? There is an example called digital-bert that will do that (bert=bit error rate tester). If you have some other goal in mind, I

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