| 摘要 |
A characteristics measurement device is applicable to various kinds of measurement devices for measuring characteristics subjected to a measurement in a certain environment. The characteristics measurement device measures a noise level in the environment, and determines the noise state based on the obtained noise level. Then, the characteristics measurement device determines the number of times of measurement of the characteristics based on the noise state, and executes synchronized addition of the characteristics obtained by the plural measurements to output the characteristics. Thus, when the noise state in the environment of the measurement execution is preferable, the measurement is completed in the smallest number of times of measurement. Additionally, when the noise state of the environment is not preferable, the plural measurements are executed in order to obtain the desired noise state (e.g., S/N), and the results are synchronized and added. Since the influence of the noise is reduced by repeating the synchronized addition, the measurement result with high accuracy can be obtained. In the environment of the measurement execution, an unexpected noise other than an ordinary noise may occur. If the unexpected noise occurs, measurement accuracy largely becomes low. Then, when a correlation of the plural measurement results is low, it is assumed that the unexpected noise occurs. By increasing the number of times of measurement, the influence of the unexpected noise can be removed.
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