Information panel - voxo22/hackrf-spectrum-analyzer GitHub Wiki

The information panel is a small window above the lower right part of the waterfall. It contains three lines of information that are obtained from the PEAK curve (e.g.):

RBW: 50 kHz / FFT bins: 846 / 11.8 fps

Total peak power: -61 dBm (≈ 81 µW/m²)

Max: -76.6 dBm @ 2439.80 MHz

The first line displays the currently calculated resolution bandwidth (RBW), the number of samples (FFT bins) per spectrum, and the waterfall rendering speed in frames per second.

The second line displays the total power for the displayed spectrum. It sums up the individual powers in dBm for each FFT bin. Using this parameter, it is then possible to easily express the total power per channel for more complex wide-spectrum modulations. At the same time, this parameter is converted to power flux density and thus allows for an approximate calculation of the RF field strength. However, this requires that you first perform a calibration on the control panel according to a known source or a calibrated measuring instrument.

The third line displays the current maximum amplitude of the PEAK curve from the entire displayed spectrum and the frequency at which this maximum amplitude is located. This data can also be displayed graphically on the spectral chart by turning on the PEAK MARKER on the control panel.

Note: As all the information is obtained from the PEAK curve, turning off the PEAK curve in control panel also stops refreshing it.