| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent the misuse of a device by inspecting whether or not oscillators have been operated. <P>SOLUTION: An inspection device 100 includes a first oscillator 101 which produces a first oscillation signal with a first predetermined frequency; a second oscillator 102 which produces a second oscillation signal with a second predetermined frequency; a comparator 109 connected to the first and second oscillators; and a housing that houses them. Using the second frequency, the comparator 109 is capable of inspecting whether or not the first frequency is within a predetermined range, and outputting a signal indicating whether or not the first frequency is within the predetermined range. <P>COPYRIGHT: (C)2004,JPO |
