Practice reception and identification in a high-fidelity virtual RF environment. This simulator models real-world hardware characteristics, including gain overload, frequency drift, and relative signal-to-noise ratios.
Interact: Click Waterfall to Center Frequency
OOK · Center Offset: 0.00 MHz
Awaiting Valid Data Lock
Increasing gain amplifies weak signals but also raises the noise floor. Too much gain (>40dB) can cause overload and intermodulation artifacts, which look like "ghost" signals across the band.
Lower-end SDRs (like the RTL-SDR) experience thermal drift. Notice how the signal may shift slightly as the simulator progresses; this is why PPM correction is often needed in real hardware.
Observe the width of the signal columns. Pagers are narrowband (12.5kHz), while ADS-B pulses are much wider. Selecting the wrong filter width will cause decoding failure.