| 摘要 |
A method and apparatus for testing the operation of a videophone wherein a rotating body having a visual pattern of contrasting visual shapes is placed within the visual field of the videophone. The videophone is connected to a communication path which in turn is connected to a display. A control device varies at least one of the rotational speed of the rotating body and the characteristics of the communication path, while an image of the rotating body is observed on the display.
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