221 the settings necessary for demodulating the signal l u2032 are listed in fig6 the settings needed to demodulate the signal l u2032 are the same as those for demodulating the ordinary signal on the 8 mhz band except for the complex frequency set on the complex variable frequency oscillator 203 for converting the if signal tvif into the complex baseband signal c 1 that is the complex oscillation frequency of the complex variable frequency oscillator 203 is set to 36 15 mhz for demodulating the ordinary 8 mhz band signal and to u2212 35 45 mhz for demodulating the signal l u2032 the remaining settings are the same for the two signals what is carried out by the digital demodulation circuit section 200 in demodulating the signal l u2032 is described below 1 the if signal shown in fig8 a is converted into digital data by the a d conversion section 201 2 the if signal in digital form is sent to the complex multiplier 202 for complex multiplication by the complex oscillation frequency signal having the complex frequency of u2212 35 45 mhz coming from the complex variable frequency oscillator 203 the complex multiplier 202 thus converts the digital if signal into the complex baseband signal c 1 shown in fig8 b where the ordinary 8 mhz band signal is to be demodulated the negative if signal is multiplied by the complex oscillation frequency signal at 36 15 mhz and thereby shifted into the complex baseband range in the case of the signal l u2032 the positive if signal is multiplied by the complex oscillation frequency signal at u2212 35 45 mhz and thereby.