RTL-SDR Blog V4 · TPK2 directional antenna (115°)

Spectrum survey

Peak hold (max of all sweeps) Average power Noise floor estimate

Waterfall

time runs down · each row is one full sweep · drag to zoom, double-click to reset

Detected signals

Levels are dB above the local noise floor. "Active" is the share of sweeps where the signal was more than 6 dB above the floor. Click a row to zoom to it.

From MHzTo MHzPeak MHzWidth kHzPeak dBMedian dBActiveTypeBand / likely source

Method and limits

Hobby measurement by Kalle Tuulos, OH1HQZ. Measured at my home in Turku, locator KP10CL. Contact: oh1hqz (at) gmail.com