Signals 1. 20 kHz Sine wave modulated with FM fm = 20 kHz fc = 110 kHz df = 75 kHz B = 2 * (fm + df) = 190 kHz f_max = fc + df = 185 kHz f_min = fc - df = 35 kHz 2. 20 kHz Square wave modulated with FSK fm = 20 kHz fc = 275 kHz df = 75 kHz f1 = fc + df = f2 = fc - df = B = 2 * df + 2 * fm = 190 kHz f_max = fc + df = 200 kHz f_min = fc - df = 350 kHz 3. 20 kHz Sawtooth wave modulated with AM fm = 20 kHz fc = 385 kHz B = 2 * fm = 40 kHz f_max = fc + fm = 405 kHz f_min = fc - fm = 365 kHz 4. 20 kHz Square wave OOK fm = 20 kHz fc = 480 kHz B = 6 * fm = 120 kHz f_max = fc + fm = 540 kHz f_min = fc - fm = 420 kHz