Sabur, Fatmawati, and Mulyadi Nur. “Feasibility Test of Raspberry Pi Based Spectrum Analyzer and Transfer Level Register-Software Defined Radio As Learning Media for Frequency Measurement”. AL-ISHLAH: Jurnal Pendidikan, vol. 14, no. 2, June 2022, pp. 2087-98, doi:10.35445/alishlah.v14i2.1459.