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Description
This study explores an innovative approach utilizing mobile-based spectrum analyzer applications to visualize and analyze Amplitude Modulation (AM) signals. The methodology involves generating an AM signal using a modulator circuit and capturing the output through the mobile device’s microphone. The acquired signal is then processed using mobile spectrum analyzer applications, which employ fast Fourier transform (FFT) techniques to extract carrier frequency, sidebands, and modulation index. This approach enables cost-effective and portable AM analysis, making the experiment more accessible for students and researchers. The proposed technique not only democratizes access to AM signal analysis but also aligns with the advancement of mobile-assisted experimental techniques in education. The results demonstrate that mobile spectrum analyzers provide sufficient accuracy for fundamental AM parameter measurements, proving to be an efficient alternative to traditional benchtop analyzers. This work underscores the potential of integrating smartphone-based measurement tools in communication engineering laboratories, fostering an innovative and scalable approach to hands-on learning.
| Education level | Age 15-18 (Secondary education) |
|---|---|
| Physics topic | Contemporary and modern physics |
| Research focus | Active learning |
| Research method | Analytic Physics Education Research (Quantitative research) |
| Organizing preference criteria | Research focus |
