Development of the Function Check Stability of Digital Media Receivers using Interference Mitigation Techniques

This study explores techniques to mitigate interference in assessing functions related to AM radio wave signals in digital media receivers. Signal transmission cable testing focused on BNC RG59 75-ohm cables with length of 300 mm. Six methods were employed: Method 1 used a Ferrite core, Method 2 used copper tape, Method 3 connected a grounding wire, Method 4 combined grounding wire connection with a Ferrite core, Method 5 combined grounding wire connection with copper tape, and Method 6 combined grounding wire connection with both a Ferrite Core and copper tape. The result has been shown that Method 6 yielded optimal results, with AM 1000 kHz Usable Sens, AM Interstation Noise L, and AM Interstation Noise R functions differing from reference values by −3.53 dBm, −5.05 dBm, and −5.26 dBm, respectively, emphasizing its efficacy in enhancing the assessed functions.