| 摘要 |
PROBLEM TO BE SOLVED: To provide spatial optical transmission equipment with which it can be immediately and easily confirmed by operation from one spatial optical transmission equipment side that both the spatial optical transmission equipment are set in a state of enabling data transmission. SOLUTION: When a test switch 19 of one device is turned on, a test pulse A generator 29 is operated, a test pulse signal A is sent to a transmission circuit, and the transmission circuit transmits the test pulse signal A by flooding light, on which the test pulse signal is set, from a flood element 6 to the other device. When the test pulse signal A is received through a photodetector and a reception circuit, the other device detects this signal through a pulse width measuring circuit 21 and a pulse A continuous detection circuit 22 and at such a time, a test pulse B generator 11 generates a test pulse signal B. A transmission circuit at the other device sends the test pulse signal B to one device. When one device receives the test pulse signal B through the photodetector and the reception circuit, this is detected through a pulse width measuring circuit 21 and a pulse B continuous detection circuit 23 and at such a time, a test result display circuit 30 performs the display of test OK. |
