# Problem 7 (10%) Consider the following modulating signal, which is the sum of two sinusoids: m(t) =

Problem 7 (10%) Consider the following modulating signal, which is the sum of two sinusoids: m(t) = cos(211 x 1kHz x t) + 2cos(210 x 2kHz x t). Suppose the signal m(t) is used to amplitude modulate a carrier c(t) = cos(210 x 5kHz x t). In the spaces below, sketch the double-sided amplitude line spectrum of the modulated carrier for DSB-SC modulation and SSB with LSB modulation. Be sure to properly label your y-axis (amplitude axis). (a) DSB-SC (b) SSB with LSB – – – – – – – – HHHHHHHHHHHHHHHHf[kHz] -8-7-6-5-4-3-2-1 1 2 3 4 5 6 7 8 -HHHHHHHHHHHHHHHH f [kHz] -8-7-6-5-4-3-2-1 1 2 3 4 5 6 7 8