Communication Systems - Engineering

Q1:

Pressing a key on telephone set generates two frequencies. The basis for selection of these frequencies is

A the harmonics of one frequency should not be mistaken for the other frequency

B the audio input to the handset transmitter should not be mistaken for a key pressing

C both (a) and (b)

D neither (a) nor (b)

ANS:C - both (a) and (b)

No answer description is available.