Digital modulated signal receiver

摘要

A radio receiver receives a 4-FSK signal through a radio system and a detector detects a four-level detected signal from the 4-FSK signal. The four-level detected signal is converted into digital form by an AD converter. The digital signal is stored onto a memory. The AD conversion is performed at intervals obtained from the four-level detected signal. A CPU performs the data processing of the received digital data when the AD conversion is not performed and does not perform it when the AD conversion is performed.