Re: [Discuss-gnuradio] usrp_spectrum_sense.py segmentation fault problem

2011-12-20 Thread Tom Rondeau
On Tue, Dec 20, 2011 at 11:02 AM, Thomas Tsou wrote: > On Tue, Dec 20, 2011 at 5:11 AM, Sebastian Döring > wrote: > >> > -- > >> #0 0x0013a455 in sem_post@@GLIBC_2.1 () from > >> /lib/tls/i686/cm

Re: [Discuss-gnuradio] UHD underrun problem

2011-12-20 Thread Josh Blum
On 12/20/2011 04:39 AM, osama mohamed wrote: > > hi all, > > Q1:can any one tell me the common mistakes that lead to the underrun problem > occurrence while transmission > http://files.ettus.com/uhd_docs/manual/html/general.html#overflow-underflow-notes > Q2:also what are the recommended

Re: [Discuss-gnuradio] usrp_spectrum_sense.py segmentation fault problem

2011-12-20 Thread Thomas Tsou
On Tue, Dec 20, 2011 at 5:11 AM, Sebastian Döring wrote: >> -- >> #0  0x0013a455 in sem_post@@GLIBC_2.1 () from >> /lib/tls/i686/cmov/libpthread.so.0 >> #1  0x0810ab61 in PyThread_release_lock (lock

Re: [Discuss-gnuradio] usrp_spectrum_sense.py segmentation fault problem

2011-12-20 Thread Sebastian Döring
On Tue, 20 Dec 2011 11:39:39 +0100 Matthias Wilhelm wrote: Hello, judging from the log, it seems that a value conversion to float is going wrong, but my (uneducated) guess the root cause is a race between threads (this script starts quite a number of threads ..?). I would try to enter lar

[Discuss-gnuradio] UHD underrun problem

2011-12-20 Thread osama mohamed
hi all, Q1:can any one tell me the common mistakes that lead to the underrun problem occurrence while transmission Q2:also what are the recommended configurations for the send() function(buffer size , timeout ,delay between samples) Q3:do i have to send the end of burst packet after each ca

Re: [Discuss-gnuradio] Software Radio Implementation Forum workshop

2011-12-20 Thread hOWARD wONG
Sounds Good! Looking forward for your presentation! On 12/20/2011 3:20 AM, Tom Rondeau wrote: Hey everyone, I just wanted to let everyone know that I will be speaking at the new Software Radio Implementation Forum's (SRIF) first workshop this January. It's in Hong Kong, but registration is

Re: [Discuss-gnuradio] usrp_spectrum_sense.py segmentation fault problem

2011-12-20 Thread Matthias Wilhelm
Hello, judging from the log, it seems that a value conversion to float is going wrong, but my (uneducated) guess the root cause is a race between threads (this script starts quite a number of threads ..?). I would try to enter larger values for the delays (tune, dwelling delay) and see whethe

[Discuss-gnuradio] usrp_spectrum_sense.py segmentation fault problem

2011-12-20 Thread Sebastian Döring
Hello list, since I got no answer to my last post, I guess what I wrote wasn´t that helpful. I apologize for whatever I did not understand, but I am not familiar with error logs in the context of the problem I have here. I would really appreciate any help with this. Once again my problem: I