DATA COMMUNICATION SYSTEM

摘要

PURPOSE:To use effectively a transmission channel by making a master transmitter control a transmission mode in accordance with information data to be transmitted to each terminal receiver and making each terminal receiver change a receiving mode in accordance with the transmitted signal from the master transmitter. CONSTITUTION:Three slave receivers are connected to the master receiver. A transmission signal consists of a control signal frame IDn and an informtion signal frame Dn. The control signal frame IDn includes a synchronizing bit code, a discrimination code of a slave receiver to be received and a control code indicating whether information data to be transmitted to the succeeding information signal frame are included or not and the information signal frame Dn contains information data to be transmitted. The master transmitter controls the transmission mode in accordance with the information data transmitted to respective terminal receivers and the respective terminal transmitters change the receiving modes in accordance with the transmission signal from the master transmitter.