Re: [Discuss-gnuradio] Unexpected energy peak sensing thermal noise and using usrp_spectrum_sense.py

2011-05-30 Thread Yang
I dont know if this helps. I once ran spectrum_sense.py and also got peak spur at the first several fft points. I think it might relate to the hardware communication between PC and USRP at the initial stage. -- Yang Sent with Sparrow On 2011年5月26日星期四 at 下午4:14, Lebowski80 wrote: Thank you

Re: [Discuss-gnuradio] Unexpected energy peak sensing thermal noise and using usrp_spectrum_sense.py

2011-05-30 Thread Yang
I dont know if this helps. I once ran spectrum_sense.py and also got peak spur at the first several fft points. I think it might relate to the hardware communication between PC and USRP at the initial stage. -- Yang Sent with Sparrow On 2011年5月26日星期四 at 下午4:14, Lebowski80 wrote: Thank you

Re: [Discuss-gnuradio] Unexpected energy peak sensing thermal noise and using usrp_spectrum_sense.py

2011-05-26 Thread Lebowski80
Thank you for answering but I cannot understand what you mean with The USRP is not a measurement receiver. If USRP was not a measurement receiver, which is its utility? Moreover, if it is not a measurement receiver what is the result memorized in m.data that is the output of

Re: [Discuss-gnuradio] Unexpected energy peak sensing thermal noise and using usrp_spectrum_sense.py

2011-05-26 Thread Marcus D. Leech
Thank you for answering but I cannot understand what you mean with The USRP is not a measurement receiver. If USRP was not a measurement receiver, which is its utility? Moreover, if it is not a measurement receiver what is the result memorized in m.data that is the output of

[Discuss-gnuradio] Unexpected energy peak sensing thermal noise and using usrp_spectrum_sense.py

2011-05-25 Thread Lebowski80
Hello everyone I’m using an USRP with a XCVR2450 daughter board working at 2.4 - 2.5 GHz. I want to find a threshold between thermal noise and signals energy using the script usrp_spectrum_sense.py and sensing from 2.400 GHz to 2.500 GHz. To do that, I replaced the WiFi antenna with a resistor

Re: [Discuss-gnuradio] Unexpected energy peak sensing thermal noise and using usrp_spectrum_sense.py

2011-05-25 Thread Nick Foster
On Wed, 2011-05-25 at 08:51 -0700, Lebowski80 wrote: Hello everyone I’m using an USRP with a XCVR2450 daughter board working at 2.4 - 2.5 GHz. I want to find a threshold between thermal noise and signals energy using the script usrp_spectrum_sense.py and sensing from 2.400 GHz to 2.500 GHz.