Hi Jacqueline, judging from the file name (_1Msps), the sampling rate is 1 MS/s. When it comes to signal bandwidth – a complex 1MS/s stream can contain /up to/ 1 MHz of bandwidth, but FM broadcast radio stations typically use something like 75 kHz of bandwidth for their FM signal.
Best regards, Marcus On 06/29/2017 04:39 PM, Jacqueline.Walker wrote: > > Hi, > > > > I downloaded the file fm101.8MHz_1Msps.cfile (from > gr-tutorials/examples/tutorial6/ ) to use for trying out demodulation > flowgraphs in gnuradio. It was recommended here: > https://wiki.gnuradio.org/index.php/Guided_Tutorial_Hardware_Considerations > > But I can’t find any details about the file – it says on the tutorial > page – ‘an actual recording from a radio (USRP I presume) with nothing > done to the data, so I presume it is just a binary stream such as one > would receive from a USRP and that the centre frequency is 101.8MHz. > What is the sample rate output by the USRP that recorded the file – is > it 250k as given on the tutorial page? What is the signal bandwidth > expected? I ask this because I don’t see that much on the FFT? > > > > Thanks > > Jacqueline > > > > _______________________________________________ > Discuss-gnuradio mailing list > [email protected] > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
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