| http://www.w3.org/ns/prov#value | - where p1, . . . , pn are positive integers and n is an integer equal to or greater than 2, and wherein the equation defines a relationship between the respective frequencies f1, . . . , fn of the arbitrary radio wave signals receivable by the radio wave reception unit and an intermediate frequency fi, and wherein the oscillation unit outputs a signal having the frequency f0;
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