| 摘要 |
PROBLEM TO BE SOLVED: To provide a frequency correction system of an oscillator capable of satisfying a guaranteed value of a frequency deviation including a secular change at a low cost in automatic communication equipment which needs a frequency of high precision and performs continuous operation for a long period of time from which a reference frequency cannot be obtained from the outside. SOLUTION: When correcting a secular change in an oscillation frequency of an oscillator of communication equipment to be shipped, a secular change in an oscillation frequency of an oscillator 301 in false communication equipment 300 is measured, and a frequency correction value is determined on the basis of the measured data while operating the false communication equipment 300 having the same circuit configuration as that of the communication equipment to be shipped and composed of the same component as the communication equipment to be shipped in parallel with the operation of the communication equipment to be shipped. A remote controller 200 transmits the determined frequency correction value to the communication equipment to be shipped through a communication line and corrects the oscillation frequency of the oscillator in the communication equipment to be shipped. COPYRIGHT: (C)2008,JPO&INPIT
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