| 摘要 |
PROBLEM TO BE SOLVED: To improve efficiency or quality of transmission a radio data communication system composed of one high-order data transmitter and a plurality of low-order data transmitters. SOLUTION: By exchanging respective recognition codes between the high- order data transmitter and each of low-order data transmitters, a number of low-order data transmitters to take part in data transmission and a class thereof are identified by the high-order data transmitter. Similarly, communication operating statuses such as a data length per packet, a carrier frequency, transmitting power and priority are made into telegraphic messages for status display and mutually communicated between the high-order and low-order data transmitters.
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