On 03/02/2023 11:30, George Edwards wrote:
Hi Fabian,
Thanks for your suggestion!
However, it will not help me because I
would like to see the spectrum displayed over the
proper range 1GHz +/- 4MHz.
George
I think we now need more information about your setup. What
type of hardware? I know of no hardware that can deliver
samples at 3Gsps into a host computer that is also
compatible with Gnu Radio.
Processing samples at 3Gsps in an ordinary computer even
with blazing-edge current CPU tech is a "significant
challenge",
and you sure as heck aren't going to do it in Gnu Radio.
My *suspicion* is that you're confused about the difference
between the *desired center frequency*, bandwidth, and
corresponding
sample rate.
Hi
George,
I don't know if the Frequency sink can do that for
you, but I guess it
cannot.
One way is to mix the signal with a complex
oscillation and a multiplier
with the oscillator running at the negative frequency
you wish to
downshift the signal. Then low-pass filter and
downsample the signal.
You can then feed that into the Frequency sink and
also set you
oscillator frequency as offset frequency in the sink's
settings.
Best,
Fabian
Am 03.02.23 um 16:52 schrieb George Edwards:
> Dear GNURadio Community,
>
> Let's say I build a GRC flowgraph operating at a
sample rate of 3 GHz
> and wish to display the spectrum over the fixed
range of 1GHz +/- 4MHz,
> how do I get the QT GUI Frequency sink to plot
over this range?
>
> Thank you!
>
> George