Transmission device, reception device, and communication system and remote operating device each including transmission device and reception device

A reception device comprising:

• a signal reception unit that receives a first frequency signal and a second frequency signal having a frequency different from a frequency of the first frequency signal, outputs a first reception signal based on the first frequency signal, and outputs a second reception signal based on the second frequency signal;
• and
• a second control unit that receives the first reception signal and the second reception signal, wherein
• the second control unit outputs a first control signal in a case where at least one of the first reception signal or the second reception signal includes transmission data.

A communication system comprising:

• a transmission device including
• a first control unit that outputs transmission data including an identification signal, and
• a signal transmission unit that receives the transmission data, converts the transmission data to a first frequency signal and a second frequency signal having a frequency different from that of the first frequency signal, and transmits the first frequency signal and the second frequency signal;
• and
• a reception device including
• a signal reception unit that receives the first frequency signal and the second frequency signal, outputs a first reception signal based on the first frequency signal, and outputs a second reception signal based on the second frequency signal, and
• a second control unit that receives the first reception signal and the second reception signal, wherein
• the second control unit outputs a first control signal in a case where at least one of the first reception signal or the second reception signal includes the transmission data.

A remote operating device comprising:

• an input unit;
• a transmission device including
• a first control unit that outputs transmission data including an identification signal based on an instruction signal input from the input unit, and
• a signal transmission unit that receives the transmission data and converts the transmission data to a first frequency signal and a second frequency signal having a frequency different from that of the first frequency signal;
• a reception device including
• a signal reception unit that receives the first frequency signal and the second frequency signal, outputs a first reception signal based on the first frequency signal, and outputs a second reception signal based on the second frequency signal, and
• a second control unit that receives the first reception signal and the second reception signal;
• and
• a controlled unit, wherein
• the second control unit outputs the first control signal to the controlled unit in a case where at least one of the first reception signal or the second reception signal includes the transmission data.