| 摘要 |
PURPOSE:To superimpose optionally two different signals for transmission by transmitting a 2nd signal in superimposing to detect the presence of code rule violation when coding a differential in the 2nd Manchester of a signal to be transmitted. CONSTITUTION:A 1st signal to be transmitted is inputted from a data input terminal D and subject to Manchester coding by a coder 61a. A data signal subject to Manchester coding is inputted to the 2nd coder 61b, where the 2nd Manchester coding is applied. In such a case, the 2nd signal such as a control signal is inputted from a code rule violation input V2 of the 2nd code rule 61b. That is, the signal is inserted in case the occurrence of code rule violation while keeping a prescribed rule, and decoded code rule violation signal is detected to be out of the rule, then a reset signal of the decoder is generated. The signal generated in such a way is fed to a Manchester coding signal, the 2nd signal is superimposed and outputted to a transmission line 63. |
