| 摘要 |
PURPOSE:To confirm easily whether or not the transmission and reception of transmitted data is correcly made, by collating the reception and transmission data through the returning of the content of received data to the transmission side. CONSTITUTION:In a transmitter 1, a transmission data 3 is fed to an encoder 5 via a shaft register 4. Further, in the encoder 5, the transmitted data is in pulse width modulation through the use of long and short, two types of pulses, and the signal with a long pulse width produced every other bit time is taken as the clock signal in bit synchronism, and the signal with a short pulse width inserted in the bit time between the clock signals is taken as data signal, and a continuous plurality of short pulse width signals are taken as control signals. Further, the data signal and the control signals are transmitted to a receiver 2, where the transmitted data is received and interpreted. The data is returned to the transmitter for confirmation and readout. |
