Time DomainWhat the signal looks like over time: amplitude, pulses, and waveform shape.
Frequency DomainWhat frequencies are present inside the signal. This is where FFT becomes powerful.
AmplitudeSignal strength or voltage level. In RF work this is often discussed in dB.
FrequencyHow many cycles per second. Measured in hertz.
WavelengthThe physical length of one cycle. Frequency and wavelength are linked.
BandwidthHow much spectrum a signal occupies or a channel allows.
NoiseUnwanted energy that hides or distorts information.
ModulationHow information is placed onto a carrier wave: AM, FM, PSK, QAM, and more.
AntennasStructures that convert electrical signals into electromagnetic waves and back.
SDRSoftware-defined radio moves tuning, filtering, and demodulation into software.
HackRFA wideband SDR tool for legal lab receiving, education, and controlled experimentation.
Spectrum SafetyLearn legal and responsible spectrum usage, licensing, interference awareness, and safe RF practices.