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Monitoring the FM Band ?

Question asked by yann12 on Dec 7, 2015
Latest reply on Dec 9, 2015 by larsc

Hello,

I Follow the instructions of the Wiki page HowTo: observe the FM band with an AD9361-equipped board [Analog Devices Wiki]

When I try to launch the capture on the IIO Oscilloscope I obtain the following figure :

radio_87_4Mhz_22MHzBandwidth2.png

It is very different to the capture expected on the Wiki !

Where does it come from ? Bad antenna ? dammage on the board ?

I make this configuration :

radio_87_4MHz_config.png

I also tried the following command : iio_fm_radio 95.5 | aplay -D sysdefault:CARD=ADAU1761 -r 48000 -f S16

And I doesn't ear anything on the headphone output.

 

I'm using a Zedboard with the FMMCOMS2 analog device board and the antenna given with the board like this picture :

AES-ZSDR2-ADI-G-lg-(2).png

Best Regards,

Yann

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