Design of Spectrum Analyzer Android-based Instructional Media for Vocational High School Student

This research aims to produce spectrum analyzer instructional media that will be implemented in Radio Transmission Operations and Maintenance subjects. Research development adopts the ADDIE model according to William W. Lee & Diana L. Owens, which includes: analysis, design, development and implementation, and evaluation. In the development and implementation steps, there are activities in the form of expert validation of instructional media based on Android applications. Theory experts, media experts, and users were necessary for the evaluation. Furthermore, the spectrum analyzer instructional media was tested on learning activity in Telecommunication Transmission Engineering Skill Competency at SMK Telkom Jakarta. The gain from the range of questionnaire values is converted to determine the eligibility category. The results showed that teaching and learning activities in operating and maintaining radio transmission subjects require instructional media for practical activity learning in the form of software on an Android-based smartphone consisting of theory, quiz, and job sheets; and a manual guide of media. The research results show that the value of the spectrum analyzer instructional media quality, in general, is 3.46, which is interpreted in the excellent category. Because the Android-based spectrum analyzer instructional media obtained an excellent feasibility value, this media reliable to be implemented in classroom learning.