AirSleuth

RF Spectrum Analyzer Software for RTLSDR (RTL2832U) Receivers


AirSleuth software turns data collected from RTLSDR (RTL2832U) receivers into graphical charts and displays in real time.  As a wideband RF spectrum analyzer that spans the frequency range of 24 - 1766 MHz, AirSleuth has many applications -- enabling users to visualize the RF environment, monitor RF signals, troubleshoot RF issues, and detect sources of RF interference.  


AirSleuth offers a variety of diagnostic views of the data captured by the RTLSDR receiver. Employing multiple views of the data enhances your ability to gain a better understanding of the local, RF landscape.



Spectrum Trace View

Continuously scans and samples the relative signal strength (dB) of frequencies in the range the user has specified.  In the 'Spectrum Trace' view the relative signal strength data (in dB) is displayed as a function of frequency.  The high resolution view uses a step-size of approximately 25 KHz.


Waterfall History

Provides a color-based visualization of the RF level and activity over time.  As signal levels for specific frequencies or frequency ranges increase and decrease, the waterfall map varies its colors. This feature provides a quick glance back into the sweep history to identify aberrations or fluctuation in frequency levels.


Density Map

Displays accumulated RF energy as a function of frequency.  The power of the relative signal strength in dB is shown across the frequency span.  Over time, this spectral view will approximate the steady-state RF energy signature of a given environment.


Threshold Trace

Highlights those frequencies whose signal strength exceeds a user-defined threshold. This feature is especially useful for visually emphasizing strong signals (and de-emphasizing weak ones), where the user gets to define 'strong' and 'weak' according to where they set the threshold.


Delta Trace

This chart is used to view small (or large) changes in the RF spectrum trace over time.  Plotting the data in this way makes it easy to detect or compare RF changes that occurred since the initial 'snapshot' or reference trace was acquired.