| 摘要 |
PROBLEM TO BE SOLVED: To acquire information extending over the entire operating frequency bands of an electric circuit without causing interferences with a generated signal by sweeping a pilot signal modulated carrier signal so as to be passed over all operation frequency bands of the electric circuit. SOLUTION: This system is provided with a carrier circuit 171 which is connected to a simple side band(SSB) modulator 188 and a detection circuit 191. Information acquired at the detection circuit 191 is collected from a pilot signal modulated carrier signal impressed to an electric circuit 108 by using the carrier circuit 171 and the simple side band modulator 188. The carrier circuit 171 and the SSB modulator 188 cause the pilot signal modulated carrier signal to pass across the operation frequency band of the electric circuit 108 (sweeping the frequency within the operation frequency band of the electric circuit 108). In this case, the detection circuit 191 impresses the pilot signal modulated carrier signal to be sweps to the electric circuit 108, or acquires information from the pilot signal, only when interference does not exist between the detection circuit and a signal generated in the electric circuit 108.
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