Key benefits Professional oscilloscope measurement capability with a 7.83 Hz standard sinewave. The waveform is real and effective for accurate testing. Outputs 7.83 Hz SchumannWave. Built with fine quality materials to support consistent frequency stability and reliable operation. Digital circuit crystal oscillator frequency reference delivers stable performance and strong antiinterference characteristics. Key specifications and attributes Function: 7.83 Hz standard sinewave and 7.83 Hz SchumannWave output. Frequency range: 0.001 Hz to 200 kHz. Waveform quality: real and effective signal appropriate for oscilloscope measurement. Construction: fine quality materials emphasized for stable operation. Reference: digital circuit crystal oscillator frequency reference for improved stability and antiinterference performance. Practical use scenarios Laboratory measurement and calibration: use the precise lowfrequency signal for calibrating and validating oscilloscope inputs and lowfrequency channels. Schumann resonance research and demonstrations: generate and modulate the 7.83 Hz signal to study resonance phenomena or to illustrate concepts in educational settings. Electronics testing and experimentation: employ the programmable frequency modulation to test filters, amplifiers, and other circuits across a broad frequency range with a stable reference signal.