Question #258847
  1. There are stations having the maximum frequency deviation of 75 kHz, and the maximum audio frequency for the modulation is 15 kHz , find its deviation ratio.
  2. Determine the peak frequency deviation for a FM modulator with a deviation sensitivity of 12 kHz/V  and a peak modulating signal of 9V.
  3. If the maximum frequency deviation of the carrier is 10 kHz and the maximum modulating frequency is 6.7 kHz, find the modulating index.
  4. A PM signal has a maximum allowed deviation of 22 kHz  and an actual deviation of 5 kHz . What is its percent modulation?
1
Expert's answer
2021-10-31T18:16:05-0400

1.

Deviation ratio

maximumallowabledeviationmaximummodulatingfrequency\frac{maximum allowable deviation}{maximum modulating frequency}

=7515\frac {75}{15}

=5


2.

Frequency deviation =Akf

Where Am = modulating frequency

kf= frequency sensitivity

Frequency deviation = 12×9

108kHz


3.

Modulating index=frequencydeviationmodulatingfrequency\frac {frequency deviation}{modulating frequency}

106.7\frac {10}{6.7}


=1.4925


4.

Percentage modulation= actualfrequencydeviationallowabledeviation\frac {actual frequency deviation}{allowable deviation}


=522×100%\frac {5}{22}×100\%


=22.73%



Need a fast expert's response?

Submit order

and get a quick answer at the best price

for any assignment or question with DETAILED EXPLANATIONS!

Comments

No comments. Be the first!
LATEST TUTORIALS
APPROVED BY CLIENTS