Re: [Discuss-gnuradio] FM receiver blocks not working

[Marcus Müller]

Hi Rahul,

ah! With that information (wrong frequency for daughterboard) it all makes sense. However, UHD will usually print a warning about not being able to tune to the frequency.
Now, is it possible that you only copy and pasted a part of your program's output? Otherwise, we'll have to look into marking that a bug (but that would be really surprising)

Best regards,
Marcus

On 08.06.2016 00:22, Derek Kozel wrote:

Hello Rahul,

Thank you for working through the setup with me. The XCVR2450 daughterboard can only tune as low as 2.4GHz so is unable to receive broadcast FM, which would use the Wide Band FM Receive block, at 98 MHz. You can try observing WiFi signals at 2.437 MHz as a pretty reliable test signal. You should also check what antenna you have connected and make sure it is appropriate for the frequencies you wish to receive.

Regards,

Derek

On Tue, Jun 7, 2016 at 3:01 PM, Rahul Pal Singh <address@hidden> wrote:

Block Diagram image is ATTACHED.

But I am actually not confident whether the device is transmitting the desired input and then receiving it as it is.  What i want to tell i have used GNU Radio Companion for constructing the FM receiver but shows following error:
Loading: "/home/rahul/fm_rx.grc"
>>> Done

Showing: "/home/rahul/fm_rx.grc"

Generating: '/home/rahul/fm_rx.py'

Generating: '/home/rahul/fm_rx.py'

Executing: /usr/bin/python -u /home/rahul/fm_rx.py

linux; GNU C++ version 5.3.1 20160413; Boost_105800; UHD_003.009.004-0-g2b5a88bb

Using Volk machine: avx2_64_mmx_orc
-- Opening a USRP2/N-Series device...
-- Current recv frame size: 1472 bytes
-- Current send frame size: 1472 bytes

UHD Warning:
    Unable to set the thread priority. Performance may be negatively affected.
    Please see the general application notes in the manual for instructions.
    EnvironmentError: OSError: error in pthread_setschedparam
gr::log :INFO: audio source - Audio sink arch: alsa
len(audio_taps) = 925
aU

i WANT TO KNOW WHY I AM LISTNING ANYTHING MUSIC AS IN THE FM RADIO. iS THERE ANY ISSUE WITH THE SOFTWARE OR DRIVERS INSTALLED OR THERE IS PROGRAMMING ERROR

From:

Rahul

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