DATA COMMUNICATION EQUIPMENT

摘要

PURPOSE:To attain the transmission of a signal with a small power at a low error rate by setting a carrier frequency set by a frequency conversion circuit to be a frequency with a small number of simultaneous communication channels based on a carrier frequency with a small interference level. CONSTITUTION:The information sent from an external voice encoder or the like are converted by a frequency conversion circuit 10 into a desired carrier frequency in a transmission section 8 and sent from a transmission antenna 9. In the case of the transmission in which a low error rate is required, the frequency conversion circuit 10 sets a transmission frequency of a data transmission channel to a frequency with a small number of simultaneous communication channels based on a carrier frequency with a small interference level sought by an interference measurement circuit 7 built in a reception section 1 with an instruction of an information transmission classification setting circuit 14. Then the information related to the transmission frequency of the data transmission channel is reported to a reception section being an object of data transmission through a common control channel in which a frequency and a spread code are set fixedly.