1- the information signal is converted to the final signal to be transmitted by

Question

1- the information signal is converted to the final signal to be transmitted by the :

a-loudspeaker
b-modulator
c-transmiter output block
d-receiver

2- the carrier wave is :

a-any high frequency signal used to convey information from one place to another.
b-another name for a 1MHz sinsudal signal
c-also called an information signal
d-a frequency betwen 300 hz to 3400 hz

3-amplitude modulation occours when :

a- the information signal is made to increase & decrease

b- a high power carrier wave is used

c- the information signal is used to control the amplitude of the carrier wave

d- an antenna is used

4- in general the frequency spectrum of a human voice lies almost entirly :

a- betwen 300 hz to 3400 hz

b- @ 3.4 khz

c- in discrete states.

d- betwen 0 & 300 hz

5- if a carrier wave contained components of (200-400-750)khz and was modulated by 5 khz information signal the overall bandwidth of the transmission would be :

a-550 khz

b-10 khz

c-1.5 Mhz

d-560 khz

Explanation / Answer

1-b 2-a 3-c 4-a 5-b; =2*Fm, Fm: message signal bandwidth. regards.

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