MODULATION APPARATUS, TEST APPARATUS, AND CORRECTION METHOD

摘要

PROBLEM TO BE SOLVED: To readily adjust a quadrature modulation apparatus by decreasing the scale of an adjusting circuit of the quadrature modulation apparatus.

SOLUTION: The modulation apparatus for quadrature modulating a periodic signal includes: an I-side signal output unit that outputs an I-component signal; a Q-side signal output unit that outputs a Q-component signal; a quadrature modulator that quadrature-modulates the periodic signal with the I-component signal and the Q-component signal; an I-side correcting unit that corrects the I-component signal according to an error of the quadrature modulator; and a Q-side correcting unit that corrects the Q-component signal according to the error of the quadrature modulator.

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