# Usrp n210

**URL:** <https://www.ruby-forum.com/t/usrp-n210/243196>\
**Category:** GNU Radio\
**Created:** [August 31, 2015, 11:47pm UTC](https://www.ruby-forum.com/t/usrp-n210/243196 "2015-08-31T23:47:25Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Sadaf\_N](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/858c86/32.png) [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\
**Post date:** [August 31, 2015, 11:47pm UTC](https://www.ruby-forum.com/t/usrp-n210/243196/1 "2015-08-31T23:47:25Z")

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Hello,

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

Thank you  
Abs

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**Author:** ![Abdeslam\_B](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/97f17d/32.png) [@Abdeslam\_B](https://www.ruby-forum.com/u/Abdeslam_B)\
**Post date:** [August 31, 2015, 11:58pm UTC](https://www.ruby-forum.com/t/usrp-n210/243196/2 "2015-08-31T23:58:31Z")

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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

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**Author:** ![Abdeslam\_B](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/97f17d/32.png) [@Abdeslam\_B](https://www.ruby-forum.com/u/Abdeslam_B)\
**Post date:** [September 1, 2015, 5:37pm UTC](https://www.ruby-forum.com/t/usrp-n210/243196/3 "2015-09-01T17:37:06Z")

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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

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**Author:** ![Abdeslam\_B](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/97f17d/32.png) [@Abdeslam\_B](https://www.ruby-forum.com/u/Abdeslam_B)\
**Post date:** [September 1, 2015, 7:27pm UTC](https://www.ruby-forum.com/t/usrp-n210/243196/4 "2015-09-01T19:27:32Z")

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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._

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<div class="post-metadata">

**Author:** ![Abdeslam\_B](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/97f17d/32.png) [@Abdeslam\_B](https://www.ruby-forum.com/u/Abdeslam_B)\
**Post date:** [September 1, 2015, 8:56pm UTC](https://www.ruby-forum.com/t/usrp-n210/243196/5 "2015-09-01T20:56:21Z")

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Hi Martin,

Problem solved.

Thanks you  
Abs

_Abdeslam B._

On 1 September 2015 at 19:26, Abdeslam B.  
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