Chapter 6: Frequency Modulation:Reception

Example 6.1 Page no 265

In [6]:
#Given
G=200000                  #voltage gain
v=200*10**-3              #quieting voltage

#calculation
In=v/G

#Result
print"To reach quieting, the input must be ",In*10**6,"microV"

To reach quieting, the input must be  1.0 microV

Example 6.2 Page no 272

In [11]:
#Given
f=10*10**6      #frequency
f1=50*10**3     #input frequency
f2=200*10**3    #output frequency

#Calculatiion
x=f1*2
y=f2*2

#Result
print"The capture occurred at from the free-running VCO frequency.",f1,"Hz"
print"Assume symmetrical operation,which implies a capture range of ",x,"Hz"
print"Once captured the VCO follows the input to a ",f2,"Hz deviation,implying a lock range of ",y,"Hz"

The capture occurred at from the free-running VCO frequency. 50000 Hz
Assume symmetrical operation,which implies a capture range of  100000 Hz
Once captured the VCO follows the input to a  200000 Hz deviation,implying a lock range of  400000 Hz