1) Sketch the frequency spectrum at the output of the first balanced modulator.
2) If the filter is a low pass filter, sketch the frequency spectrum at the output of the filter and amplifier.
3) Sketch the frequency spectrum at the output of the second balanced modulator.
4) When the filter is a low pass filter, sketch the frequency spectrum at the output of the filter and linear power amplifier.
5) Find out the value for the required Q for the first filter.
6) Find out the value for the required Q for the second filter.