Improving Knowledge Of Cadets Through The Development Of An Rtl-Sdr-Based Spectrum Analyzer

Abstract

The role of instructional media in the success of the learning process should not be underestimated. As a learning tool, this media has the ability to enrich students' understanding. The Spectrum Analyzer tool has the capability to display and analyze signal frequencies. In practical activities using this tool, the Spectrum Analyzer is relatively expensive, making it inaccessible to some parties. To address this, the researcher designed a tool with broad functions similar to a Spectrum Analyzer. This study employs the research and development method with the ADDIE development model. The aim of this design study is to determine whether there is an improvement in the cadets' abilities after being provided with the Spectrum Analyzer learning media. To assess the improvement in cadet knowledge regarding the Spectrum Analyzer, pretest and posttest were utilized. After conducting these tests, the N-Gain score was calculated, resulting in a percentage of 56.089% and an N-Gain value of 0.56. According to Hake, a percentage range of 56-75% falls into the interpretation category of being moderately effective. Therefore, based on the test scores conducted, it can be concluded that this instructional media application can assist in improving cadet abilities and is considered to be moderately effective and efficient.