Re: [Discuss-gnuradio] am_rcv and remote audio

2007-08-31 Thread Berndt Josef Wulf
On Saturday 01 September 2007 09:54:20 [EMAIL PROTECTED] wrote: > Hello all, > > 1. I find that in the code am_rcv.py, if you comment out the line > "src.set_pga(0,20)", the quality of the sound is improved ALOT. I guess it depends how strong the station is that you're trying to receive. cheerio

[Discuss-gnuradio] am_rcv and remote audio

2007-08-31 Thread jonshan
Hello all, 1. I find that in the code am_rcv.py, if you comment out the line "src.set_pga(0,20)", the quality of the sound is improved ALOT. 2. I have remote audio working with GNU Radio. No sound card needed, data is transferred using Network Audio System. The quality is reasonable with occasion

Re: [Discuss-gnuradio] Recommendations for USB 2.0 add-on PCI Cards

2007-08-31 Thread Caleb Phillips
> I'm running GNU Radio on a Dell Precision 530MT workstation under Ubuntu. > Unfortunately, the system only has USB 1.0 ports. I installed an 6-port USB > 2.0 add-on PCI card, but I only get a maximum transfer rate of 16 Mbps when I > run "benchmark_usb.py" from "gnuradio-examples/python/usrp

[Discuss-gnuradio] Re: fm_tx4.py stronger signal, amplifying before sending

2007-08-31 Thread Patrick Strasser
Patrick Strasser schrieb: Max Moser schrieb: Can i amplify the signal before sending? How do i do that the easiest way in python? Setting the amplitude value higher in the sourcecode? Sorry, did not read carefully. You don't need to add anything, the block "gain" is where you want to turn at

Re: [Discuss-gnuradio] Mode S and ADS-B

2007-08-31 Thread Tom Owens
Eric Blossom wrote: On Fri, Aug 31, 2007 at 10:18:15AM -0400, Tom Owens wrote: Eric A. Cottrell wrote: Tom O wrote: Hi Eric, When I run usrp_mode_s_logfile.py I get: ImportError: cannot import name air Can you help me out? Tom Hello,

[Discuss-gnuradio] Re: fm_tx4.py stronger signal, amplifying before sending

2007-08-31 Thread Patrick Strasser
Max Moser schrieb: Can i amplify the signal before sending? How do i do that the easiest way in python? Setting the amplitude value higher in the sourcecode? Of course. Use one of the gr.mulitply_const_xx blocks, x in (c, f, i, s). You can change the multiplication factor at runtime. Have a l

Re: [Discuss-gnuradio] Mode S and ADS-B

2007-08-31 Thread Eric Blossom
On Fri, Aug 31, 2007 at 10:18:15AM -0400, Tom Owens wrote: > > > Eric A. Cottrell wrote: > >Tom O wrote: > > > >> > >> > >>>Hi Eric, > >>> > >>>When I run usrp_mode_s_logfile.py I get: > >>> ImportError: cannot import name air > >>> > >>>Can you help me out? > >>> > >>>Tom > >>> > >

Re: [Discuss-gnuradio] Mode S and ADS-B

2007-08-31 Thread Eric Blossom
On Fri, Aug 31, 2007 at 09:37:25AM -0400, Tom Owens wrote: > > > Eric A. Cottrell wrote: > >Tom O wrote: > > > >> > >> > >>>Hi Eric, > >>> > >>>When I run usrp_mode_s_logfile.py I get: > >>> ImportError: cannot import name air > >>> > >>>Can you help me out? > >>> > >>>Tom > >>> > >

Re: [Discuss-gnuradio] Mode S and ADS-B

2007-08-31 Thread Michael Dickens
Tom - On Aug 31, 2007, at 10:18 AM, Tom Owens wrote: (I can find numpy at /usr/lib/python2.4/site-packages/Numeric/ _numpy.so) You haven't installed numpy yet, or it's not in the PYTHONPATH environment variable; the "_numpy.so" you refer to is just a shared library in the Numeric package.

Re: [Discuss-gnuradio] Mode S and ADS-B

2007-08-31 Thread Tom Owens
Eric A. Cottrell wrote: Tom O wrote: Hi Eric, When I run usrp_mode_s_logfile.py I get: ImportError: cannot import name air Can you help me out? Tom Hello, air is the name of the python library that contains the gr-air blocks. Make sure you compiled and installed

Re: [Discuss-gnuradio] python exception

2007-08-31 Thread Johnathan Corgan
Dominik Auras wrote: > Exception exceptions.ReferenceError: 'weakly-referenced object no longer > exists' in > > ignored The subdev object internally holds a weak reference to the USRP object (this avoids a circular dependency.) When your class goes out of scope at the end of your application,

Re: [Discuss-gnuradio] Mode S and ADS-B

2007-08-31 Thread Tom Owens
Eric A. Cottrell wrote: Tom O wrote: Hi Eric, When I run usrp_mode_s_logfile.py I get: ImportError: cannot import name air Can you help me out? Tom Hello, air is the name of the python library that contains the gr-air blocks. Make sure you compiled and installed

Re: [Discuss-gnuradio] How to implement an 802.11-like MAC protocol in GnuRadio?

2007-08-31 Thread Greg Troxel
Many people had implemented some prototypes of 802.11 protocol. For example, BBN (http://acert.ir.bbn.com/viewvc/adroitgrdevel/adroitgrdevel/gr-bbn/src/examples/) had shared the code of 802.11. However, the BBN's code seem only focus on physical layer of IEEE 802.11 (coding and modulatio

Re: [Discuss-gnuradio] GRC runtime crash

2007-08-31 Thread Justin Shaw
This happens to me to... I'm running Ubuntu Feisty Fawn on a Dell Inspiron 1505 Justin Josh Blum wrote: Well the error is coming from inside the call to gtk.main(), not directly from any calls in the GRC source. When you press the execute button, it does a call to os.system and a thread wai

[Discuss-gnuradio] python exception

2007-08-31 Thread Dominik Auras
Hi! Any idea where this exception can come from? Exception exceptions.ReferenceError: 'weakly-referenced object no longer exists' in > ignored The code does not explicitly delete the subdevice. I instantiate the usrp object, then I retrieve a handle to the subdev to set gain etc. Handles to usrp