Zener Diode Experiment, Physics instrument, Educational Scientific Instruments

Frequency Modulation & Demodulation

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Frequency Modulation & Demodulation

Frequency Modulation & Demodulation

Experimental Training Board has been designed specifically for the study of Frequency Modulation and Demodulation. Practical experience on this board carries great educative value for Science and Engineering Students.


  • The board consists of the following built in parts:
  • ± 12V D.C. at 100 mA, IC Regulated Power Supply
  • Carrier generator circuit which generates the carrier signal
  • Audio frequency modulating signal
  • Variable D.C. is provided to see the frequency deviation in carrier frequency
  • Frequency Modulation circuit with buffer stage at the output
  • Demodulating circuit
  • Adequate no. of other electronic components
  • Mains ON/OFF switch, Fuse and Jewel light
  • The unit is operative on 230V ±10% at 50Hz A.C. Mains
  • Adequate no. of patch cords stackable from rear both ends 4mm spring loaded plug length ½ metre
  • Good Quality, reliable terminal/sockets are provided at appropriate places on panel for connections & observation of waveforms
  • Strongly supported by detailed Operating Instructions, giving details of Object, Theory, Design procedures, Report Suggestions and Book References


  • Excellent performance
  • Longer life
  • Easy operations


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  • To Study Theory of Frequency Modulation & Demodulation:
  • To observe the effect of D.C. voltage on frequency of carrier waveform
  • To frequency modulate the carrier with Audio signal, observe F.M. waveform on C.R.O., and measure its modulation index
  • To demodulate the F.M. singal and observe the output on C.R.O.
  • To plot the characteristics curve of the slope detector demodulating circuit