| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a frequency hopping signal searching device that can confirm the presence of a frequency hopping wave among various space radio waves, detect a hopping rate and a frequency switching timing or the like. SOLUTION: The frequency hopping signal searching unit uses a micro scan reception section and a difference circuit employing a delay circuit to convert a signal received from an antenna into a signal on time base, analyzes the periodicity of a pulse train signal obtained thereby to detect the presence of a frequency hopping wave and a hopping rate and also a frequency switching timing or the like.</p> |
