A signal generation unit 107 and a first set value processing unit 7100 are included in a preceding stage of a transmission path connection unit 108 at a transmission side, and a signal generation unit 207 and a second set value processing unit 7200 are included in a subsequent stage of a transmission path connection unit 208 at a receiving side. The signal generation unit 107 or the signal generation unit 207 performs prescribed signal processing based on a set value. The first set value processing unit 7100 inputs a set value, that has been prescribed for the signal generation unit 107, to the signal generation unit 107, and the second set value processing unit 7200 inputs a set value, that has been prescribed for the signal generation unit 207, to the signal generation unit 207. Since the set value is not dynamically changed according to an environment change, or the like, simplification of a parameter operation circuit or reduction of power consumption is realized, and the parameter operation circuit does not unnecessarily operate even when it is used under the state without environment change.