Can I add a center-frequency parameter for my noise generator flowgraph, is there a different noise source that has this parameter other than the generic noise source block?

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  • $\begingroup$ the Noise source doesn't have something like a center frequency. And your Audio Sink can't support 2.2 MS/s. We address sampling rates in the Official Guided Tutorials. $\endgroup$ Sep 16, 2019 at 19:14
  • $\begingroup$ @MarcusMüller, Thanks! $\endgroup$
    – Hadad
    Sep 16, 2019 at 20:11

1 Answer 1


The noise from that block doesn't have a center frequency because it's "white" — it has an equal power at any frequency (up to the half the sample rate, anyway, and you can extend that as far as you need). You can give it a shape by filtering it. Whatever the shape of the filter is, will be the shape of the resulting noise power. If you run it through a bandpass filter with a given center frequency, then the noise will have that center frequency.

  • $\begingroup$ Outstanding. Thanks a lot. $\endgroup$
    – Hadad
    Sep 17, 2019 at 18:08
  • $\begingroup$ Does the same thing apply when using Low Pass Filter? $\endgroup$
    – Hadad
    Sep 17, 2019 at 18:14
  • 1
    $\begingroup$ @Hadad a lowpass doesn't have a center, it has a cutoff. $\endgroup$ Sep 17, 2019 at 19:12
  • $\begingroup$ Where is the center frequency in the bandpass filter, is it the average of the low and high cutoff frequencies? $\endgroup$
    – Hadad
    Sep 17, 2019 at 19:31
  • $\begingroup$ @hobbsKC2G, can I shape the noise with the center frequency of the USRP device? $\endgroup$
    – Hadad
    Sep 19, 2019 at 17:40

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