Experiment Name: Frequency Modulation Using Kit.
Required Apparatus:
I.
Frequency
Modulation Transmitter KIT
·
Balanced
Modulator -1
Modulation: Frequency
Modulation
Carrier Input: 1-1000
KHz; Modulating Input: 0.1-1500 KHz
·
Function
Generator [Frequency: 500-1500 KHz]
·
Voltage
Controlled Oscillator [Frequency: 500-1500 KHz]
II.
Power
Supply
III.
Oscilloscope
IV.
Connectors
Block Diagram:
Figure: Amplitude Modulator
Input/Output Waveshape:
Figure 01: Waveshape of input signal
Figure 02: At maximum message
amplitude
Figure 03: At maximum carrier
frequency
Figure 04: At minimum carrier
frequency
Discussion:
From this
experiment, we get a clear concept about Frequency Modulation. We can see that,
if we increase the amplitude of main signal, the modulated signal’s frequency
increases. And if we decrease the amplitude of the main or message signal then
the modulated signal’s amplitude also decreases. From this experiment, we also
observed that, Frequency deviation will be proportional to the bandwidth and
main signal’s peak amplitude is proportional to the modulated frequency.
Conclusion:
While doing
the experiment, some precautions should be taken. Sometimes we can’t get the
accurate wave shape because of the loose connection. And there was some
distortion while calibrating the oscilloscope. So, we have to check the
connection properly and we have to calibrate the oscilloscope accurately to get
the accurate or proper wave shape.