[Discuss-gnuradio] Unable to run TUNNEL.PY in usrp.

2009-12-16 Thread amarnath alapati
hi , I am using Fedora Core 11 OS. I have succesfully executed benchmark_tx.py, benchmark_rx.py files. But coming to TUNNEL.PY I am unable to ping to the other computer. Self ping is working. Please help me, ( I am a beginner) -- AMARNATH.A IIT-Madras India

Re: [Discuss-gnuradio] how to use Log Power FFT module in python

2009-12-16 Thread nansai hu
In the binary floating point data,how many bits represent data and how many bits represnt the right? 2009/12/16 Josh Blum > > > nansai hu wrote: > >> Many Thanks. >> I use a file sink to received the result of Log Power FFT and it can be >> excute successfully. >> But the file which I saved is

Re: [Discuss-gnuradio] how to use Log Power FFT module in python

2009-12-16 Thread Josh Blum
nansai hu wrote: Many Thanks. I use a file sink to received the result of Log Power FFT and it can be excute successfully. But the file which I saved is hard to read and understand. Its binary floating point data. In my mind, I think a scenario like this: I use a signal generater to transm

Re: [Discuss-gnuradio] how to use Log Power FFT module in python

2009-12-16 Thread nansai hu
Many Thanks. I use a file sink to received the result of Log Power FFT and it can be excute successfully. But the file which I saved is hard to read and understand. In my mind, I think a scenario like this: I use a signal generater to transmit a signal, then I use USRP to received. USRP include a

Re: [Discuss-gnuradio] how to use Log Power FFT module in python

2009-12-16 Thread Josh Blum
A few ways I can think of off-hand: 1) make a custom gr.hier_block2 in python, it can read from a message queue 2) use a file sink to dump the data from the log power fft to file, post-process the file 3) you could use the variable sink in grc to write the fft vectors to a variable called ff

Re: [Discuss-gnuradio] how to use Log Power FFT module in python

2009-12-16 Thread nansai hu
Ok. I add a vector sink in GRC and to observe the data in that module. But when I run GRC there is no result shown. I need to add some other block to see or I need write some code like "prinf" in Python? 2009/12/16 Josh Blum > all blocks that have: > > 1) a float input/sink port > 2) a vector

Re: [Discuss-gnuradio] how to use Log Power FFT module in python

2009-12-16 Thread Josh Blum
all blocks that have: 1) a float input/sink port 2) a vector length set to fft_size -josh nansai hu wrote: My question is I can't find any module in GRC can be conncet to Log Power FFT module in right format. Could you tell me which module in GRC can be use to receive Log Power FFT module? 20

Re: [Discuss-gnuradio] how to use Log Power FFT module in python

2009-12-16 Thread nansai hu
My question is I can't find any module in GRC can be conncet to Log Power FFT module in right format. Could you tell me which module in GRC can be use to receive Log Power FFT module? 2009/12/16 Josh Blum > > > nansai hu wrote: > >> I want to do some function in frequency domain and just writen

Re: [Discuss-gnuradio] how to use Log Power FFT module in python

2009-12-16 Thread Josh Blum
nansai hu wrote: I want to do some function in frequency domain and just writen a C++ block already. Now, I just want to use GRC to constuct a front end and connect to my own block. The interface bewteen these two is a power vector of FFT results and I use a Log Power FFT module in GRC. My q

[Discuss-gnuradio] how to use Log Power FFT module in python

2009-12-16 Thread nansai hu
I want to do some function in frequency domain and just writen a C++ block already. Now, I just want to use GRC to constuct a front end and connect to my own block. The interface bewteen these two is a power vector of FFT results and I use a Log Power FFT module in GRC. My question is Log Power

Re: [Discuss-gnuradio] "ImportError: Unable to locate an audio module"

2009-12-16 Thread Eric Blossom
On Wed, Dec 16, 2009 at 03:58:34PM -0300, Felipe Fideles wrote: > Dear all, > > I am having a problem when I try to run the dial_tone.py example. I get the > message: "ImportError: Unable to locate an audio module". > I already tried to install gr-audio-alsa and gr-audio-oss modules, but is > said

Re: [Discuss-gnuradio] Re: Antenna and daughterboard selection for sub-GHz

2009-12-16 Thread Eric Blossom
On Wed, Dec 16, 2009 at 10:28:02PM +0530, Anand Padmanabha Iyer wrote: > Dear All, > > Our research project requires the use of sub-GHz daughterboards in the > USRP. We have identified the TVRX receiver board and RFX400 > transceiver (is there any other option that supports the range that is > sup

[Discuss-gnuradio] "ImportError: Unable to locate an audio module"

2009-12-16 Thread Felipe Fideles
Dear all, I am having a problem when I try to run the dial_tone.py example. I get the message: "ImportError: Unable to locate an audio module". I already tried to install gr-audio-alsa and gr-audio-oss modules, but is said that they can be accessed by gnuradio module. It might be a gnuradio instal

[Discuss-gnuradio] OFDM tranceiver not responding as intended on USRP2

2009-12-16 Thread pradeep
Hi All, I am implementing a OFDM tranceiver. I am following the benchmark.py and tunnel.py for achieving it. I am facing the following problems while performing receive--> transmit--> receive: 1.It receives on the startup of the code. 2.It transmits and then it does not receive at all. I hav

[Discuss-gnuradio] RF frontends for daughter boards

2009-12-16 Thread praphul chandra
I am planning to implement a wideband reciever (upto 800 MHz) using Basic Tx/Rx and TV Rx card. Pls provide following information: (a) Souce of good quality RF front ends/ LNAs for use with Basic Rx & TV Rx daughterboards. (b) What is the receiver sensitivity of TV Rx Card Also, are there any pla

[Discuss-gnuradio] Re: Antenna and daughterboard selection for sub-GHz

2009-12-16 Thread Anand Padmanabha Iyer
Dear All, Our research project requires the use of sub-GHz daughterboards in the USRP. We have identified the TVRX receiver board and RFX400 transceiver (is there any other option that supports the range that is supported by the TVRX on TX side?). However, our confusion is on the antenna to be use

Re: [Discuss-gnuradio] synchronizing two USRP2

2009-12-16 Thread Doug Geiger
Tim Pearce wrote: Cheers for that Christoph, beats my post processing with timestamps fix! For what its worth I've gotten away with fairly cheap TCXO's (£15 generic farnell ones) and a GPSDO circuit like the one at http://ve2zaz.net/GPS_Std/GPS_Std.htm (it did need some manual tuning at first