There are provided a signal generation unit that generates a predetermined digital signal, a level conversion unit that converts a level of the digital signal generated by the signal generation unit, a DA converter that converts the digital signal of which the level is converted by the level conversion unit into an analog signal in a predetermined intermediate frequency bandwidth, and a control unit that creates correction data for correcting a linearity of a level of an output signal of the DA converter for all frequencies to be used, based on actual data which is data of a level of an actual output signal when a setting of the level of the output signal of the DA converter is changed at a predetermined level interval, at a predetermined frequency, and converts a level of an input signal of the DA converter with the correction data.