1.

A speech signal of 3 kHz is used to modulate a carrier signal of frequency 1 MHz, using amplitude modulation. The frequencies of the side bands will be

Answer»

1.003 MHz and 0.997 MHz
3001 KHZ and 2997 KHz
1003 KHz and 1000 KHz
1MHZ and 0.997MHz

Solution :Here, `v_(C)=1MHz, v_(c)=3kHz=0.003` MHz
The frequencies of the side bands.
` =(v_(c)+v_(m))` and `(v_(c)-v_(m))=(1+0.003)` and `(1-0.003)`
=1.003 MHz and 0.997 MHz.


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