Usrp n210

GNU Radio
1

Hello,

What is the result/consequence of running the max_power.py on USRP2 ?
How to revert back ?

Thank you
Abs

2

Hi Abs,

it’s just a flow graph that’ll receive and transmit at max gain. You
don’t have to revert the settings, they’re not persistent.

Cheers,
Martin

3

Hey Abs,

we’ll need more info than that to help you. Also, please don’t forget to
respond to the mailing list. So, please supply more info about your
setup, what exactly you’re doing etc.

Thanks,
Martin

4

Hi Martin,

I’m receiving a sat signal via USRP N210 interfaced to a pc with ubuntu.
Before when I run the usrp_spectrum_sense.py it shows the following
output :

linux; GNU C++ version 4.8.2; Boost_105400;
UHD_003.009.git-171-g51bc00ee

– Opening a USRP2/N-Series device…
– Current recv frame size: 1472 bytes
– Current send frame size: 1472 bytes
Using Volk machine: sse4_2_64_orc
gain = 19.0

2015-06-02 03:18:27.149244 center_freq 1000775000.0 freq 1000468750.0
power_db 5.58520464401 noise_floor_db -72.1895763839
2015-06-02 03:18:27.149282 center_freq 1000775000.0 freq 1000475000.0
power_db 6.39925714799 noise_floor_db -72.1895763839
2015-06-02 03:18:27.149342 center_freq 1000775000.0 freq 1000481250.0
power_db 11.4556676649 noise_floor_db -72.1895763839
2015-06-02 03:18:27.149409 center_freq 1000775000.0 freq 1000487500.0
power_db 14.7902792949 noise_floor_db -72.1895763839
2015-06-02 03:18:27.149454 center_freq 1000775000.0 freq 1000493750.0
power_db 13.7591168304 noise_floor_db -72.1895763839
2015-06-02 03:18:27.149492 center_freq 1000775000.0 freq 1000500000.0
power_db 9.48612353831 noise_floor_db -72.1895763839
2015-06-02 03:18:27.149531 center_freq 1000775000.0 freq 1000506250.0
power_db 5.03300407511 noise_floor_db -

Now some how the frequency does not change it printing the same
frequency.
(freq 1000460000.0)
So it seems the FFT not going to the right frequency so then I can’t get
the max power !

Thanks
Abs

Abdeslam B.

5

Hi Martin,

Problem solved.

Thanks you
Abs

Abdeslam B.

On 1 September 2015 at 19:26, Abdeslam B.
<[email protected]