(H)Element 3-57 Frequency Modulation

Question 1

The deviation ratios is the

Answer 1

the maximum carrier deviation to the highest audio modulating frequency

Question 2

what is the deviation ratio for an FM phone signal having a maximum frequency swing of plus or minus 7.5 kHz and accepting a maximum modulation rate of 3.5 kHz?

Answer 2

1.66

Question 3

What is the deviation ratio of an FM phone signal having a maximum frequnecy swing of plus or minus 7.5 and accepting a maximum modulation rate of 3.5?

Answer 3

2.14

Question 4

How can an FM phone signal be produced in a transmitter?

Answer 4

feeding audio directly to the oscillator

Question 5

What is meant by the term modulation index?

Answer 5

the ratio between the deviation of a frequency modulated signal and the modulating frequency

Question 6

in an fm phone signa, what is the term for the maximum deviation from the carrier frequency divided by the maximum audio modulating frequency?

Answer 6

deviation index