Re: How to display a part of the GRC spectrum?

[Fabian Schwartau]

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