| 摘要 |
PROBLEM TO BE SOLVED: To efficiently perform decording and display analysis of a received wave by properly removing received detection output consisting of a Morse signal when receiving a digital modulation wave in a wide band. SOLUTION: The wide band digital modulation wave received by an antenna 1 is divided by a frequency dividing means 6. The signals of wave detectors 8 (81 to 8N) are supplied to corresponding Morse signal removing apparatuses 9 (91 to 9N) by each divided channel to judge whether the supplied detection signal is a Morse signal or not. When the supplied detection signal is the Morse signals, output supply to rear stages (decoding circuits 101 to 10N) is disconnected through a prescribed period. Thus, since the detection output of the channel is removed through the prescribed period after the detection of the Morse signal, wasteful decoding and analysis to the Morse signal is omitted, thereby analytic display to another required unknown signal can efficiently be performed. COPYRIGHT: (C)2003,JPO
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