Re: Is there something similar to the zero-span of spectrum analyzers in gnuradio?

That's not how zero span works. Zero span is a power measurement of the entire signal (or whatever you have the RBW set to).

If you want to see individual carriers of an OFDM signal, the best way is to zero out the other carriers in the transmitter. Here's an example of an ATSC3.0 OFDM signal with all the data carriers zeroed out so that just the pilot carriers remain. You can easily see the structure of the of both the continual and scattered pilots.

Ron

On 12/19/22 07:50, Juan Antonio wrote:

I think I'm not explaining myself well again.

What I want to see in the time domain is a single carrier of an 8mhz signal. That's why I was referring to the zero-span function of spectrum analyzers.

I have tried to isolate a single 1K carrier using filters but I did not get good results. That is why I was looking for something simpler, where simply indicating the frequency, I would have the output that specific frequency in the time domain. Something like a very narrow band  raw iq(or magnitude) demodulator