| 摘要 |
PURPOSE:To attain the minimization of a transmission error by monitoring generation rate of the transmission error and controlling a motor according to the result. CONSTITUTION:Electric signal of the CP340 digital audio format of an EIAJ is converted into an optical signal by an electric/optic converting part 11, and irradiated to a space. The electric signal from a photoelectric converting part 12 is inputted to a decoder 13. The digital audio format is code-converted, and whether or not the electric signal is transmitted according to the code rule is discriminated by the decoder 13 so that the transmission error can be discovered. Then, a microcomputer 14 monitors a transmission error pulse (a pulse outputted when the transmission error is discovered) from the decoder 13, and calculates an error rate by detecting the interval of the generation of the transmission error. Moreover, the microcomputer 14 controls longitudinal and lateral direction stepping motors 15 and 16 when the error rate is more than a prescribed value, and rotates the photoelectric converting part 12 so that the error rate can be the minimum. |
