In [1]:

```
#Given
f = 915*10**6
fm_deviation =12.5*10**3
#Calculation
max_deviation = f + fm_deviation
min_deviation = f - fm_deviation
#Result
print"Maximum frequency occur during modulation is ",max_deviation/1000.0,"KHz"
print"Minimum frequency occur during modulation is ",min_deviation/1000.0,"KHz"
```

In [1]:

```
#Given
max_deviation = 25*10**3
fm =15.0*10**3
#Calculation
mf =max_deviation/fm
#Result
print"The deviation ratio of the TV sound is ",round(mf,3)
```

In [3]:

```
#Given
mf = 2.2
fd = 7.48*10**3
#Calculation
fm = fd/mf
#Result
print"The maximum modulating frequency is ",fm/1000.0,"KHz"
```

In [6]:

```
#Given
J0 = -0.4
J1 = -0.07
J2 = 0.36
J3 = 0.43
J4 = 0.28
#Result
print"The amplitude of the carrier is ",J0
print"Amplitudes of the first four sidebands are "," \n ", J1,"\n ",J2,"\n ",J3,"\n ",J4
```

In [13]:

```
#Given
fd = 30*10**3
fm = 5*10**3
N=9
#Calculation
bw1 = 2*fm*N
bw2 = 2*(fd+fm)
#Result
print"The maximum bandwidth of the fm signal is ",bw1/10**3,"KHz"
print"Bandwidth using carson's rule ",bw2/10**3,"KHz"
```

In [21]:

```
#Given
S_N = 2.8
fm = 1.5*10**3
fd =4*10**3
#Calculation
import math
fi= math.asin(1/S_N)
delta = fi*fm
SN =fd/delta
#Result
print"(a) The frequency deviation caused by the noise ",round(delta,1),"Hz"
print"(b) The improved output signal to noise ratio is ",round(SN,1)
```