SDR# Gettig sidelobs in hackrf one

[arpit003]

Hi,

The device is connected to a system running Ubuntu OS with an Intel i9 CPU, and we are utilizing the GNU Radio library for signal processing. The configuration of the GNU Radio blocks used, along with the output we are observing, is attached for your reference.

We are currently noticing more side lobes in the output signal and seek your assistance in determining whether this issue may be hardware-related or due to a configuration error.

We would greatly appreciate your guidance on this matter and look forward to prompt and positive response.

 

[dlwtrunked]

Hi,

The device is connected to a system running Ubuntu OS with an Intel i9 CPU, and we are utilizing the GNU Radio library for signal processing. The configuration of the GNU Radio blocks used, along with the output we are observing, is attached for your reference.

We are currently noticing more side lobes in the output signal and seek your assistance in determining whether this issue may be hardware-related or due to a configuration error.

We would greatly appreciate your guidance on this matter and look forward to prompt and positive response.

Is this an unmodulated carrier (from what source?). Do you have a different source you can test. What happens if you use a weaker signal or a different frequency? Years ago when I worked part-time for a company, we sometimes saw something a *little* similar (but *not* the same), but only when we used the U.S. made HackRF1 (not the Chinese). In that case, we never found the cause.

 

[boatbod]

I see a modulator block in your GRC flowgraph, but I don't see any post-modulation filtering to make the signal fit within a defined channel.