Digi XCTU lets users see the invisible. Its spectrum analyzer tests and measures energy levels (noise) across various radio channels. The tool reports the energy level of each channel in real time, keeping track with graphs and statistics to help designers select the best configuration for their network. Avoiding channels with high interference makes a network more reliable, prevents data loss, and can extend battery life. Spectrum analysis can be a powerful troubleshooting tool, helping to determine and locate sources of unwanted radio noise.