2. What advantage is there in making the frequencies of the two tons of an FSK signal, and the bit rate, sub-multiples of some reference frequency? 1. Let there be three messages each of duration To. What are the three conditions on the FSK signal durations to have integer number of cycles per signal ? 2. Let To=4 ms. How many carrier cycles in a duration To for frequency set: f1=500 Hz, 12=1000 Hz, 13 = 2000 Hz ?