# Receiving 900MHz signal on USRP1

**URL:** <https://www.ruby-forum.com/t/receiving-900mhz-signal-on-usrp1/240423>\
**Category:** GNU Radio\
**Created:** [April 13, 2014, 1:19pm UTC](https://www.ruby-forum.com/t/receiving-900mhz-signal-on-usrp1/240423 "2014-04-13T13:19:40Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Detlef\_R](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/58f4c7/32.png) [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\
**Post date:** [April 13, 2014, 1:19pm UTC](https://www.ruby-forum.com/t/receiving-900mhz-signal-on-usrp1/240423/1 "2014-04-13T13:19:40Z")

</div>

Hi  
I am new to gnuradio. I have done installation of uhd and  
gnuradio form buildgnuradio script successfully. Now I want to receive  
900MHz signal from USRP1. when i run uhd\_fft… it does not give any  
significant result. and when i run usrp\_wfm\_rcv\_pll.py it does not  
receive any signal

Its terminal output is:

usama@usama-Inspiron-N5110:~$ cd …  
usama@usama-Inspiron-N5110:/home$ cd …  
usama@usama-Inspiron-N5110:/$ cd usr/local/share/gnuradio/examples/uhd  
usama@usama-Inspiron-N5110:/usr/local/share/gnuradio/examples/uhd$ sudo  
python usrp\_wfm\_rcv\_pll.py -f 900M  
[sudo] password for usama:  
linux; GNU C++ version 4.6.3; Boost\_104800;  
UHD\_003.007.000-123-g87b068ed

– Opening a USRP1 device…  
– Using FPGA clock rate of 64.000000MHz…  
Using Volk machine: avx\_32\_mmx\_orc  
FYI: This implementation of the stereo\_carrier\_pll\_recovery has no  
squelch implementation yet  
FYI: No Powermate or Contour Knob found  
Radio does not support required frequency range.

---

<div class="post-metadata">

**Author:** ![usama\_1s](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/u/e95f7d/32.png) [@usama\_1s](https://www.ruby-forum.com/u/usama_1s)\
**Post date:** [April 13, 2014, 1:40pm UTC](https://www.ruby-forum.com/t/receiving-900mhz-signal-on-usrp1/240423/2 "2014-04-13T13:40:18Z")

</div>

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Hi usama,

The USRP1 is the platform. You use it with an RF front end, the  
so-called daughterboard.

> Radio does not support required frequency range.  
> Tells us that the daughterboard you use does not support the center  
> frequency of 900MHz.

Greetings,  
Marcus

On 13.04.2014 12:58, ??? ??? wrote:

> Its terminal output is:
> 
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> mailing list [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)  
> [Discuss-gnuradio Info Page](https://lists.gnu.org/mailman/listinfo/discuss-gnuradio)

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