Problem 2: When the input to a given audio amplifier is 4cos(800nt) + cos (1000nt) mV, the
measured frequency component at 1000Hz is 1V and the ratio of the frequency components at
500 Hz to that at 1000 Hz is 0.002. Represent the amplifier output-input characteristic by
Uo (t) = aqui (t) + az lu; (t) ]2.

a) Evaluate the numerical values of a1, a2 from the test data given. This type of test is known
as the intermodulation distortion test.
b) What would you expect to be magnitudes of the frequency component at 800 Hz and at
1600 Hz?