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Communication Trainer

Differential Pulse Code Modulation

Product Code: DIDAC-ELECTRONIC-LABS8-A035
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Description & Technical Specification

Differential Pulse Code Modulation
Experimental Training Board has been designed specifically to study Differential Pulse Code Modulation & Demodulation Trainer. In the basic DPCM Modulator the base band analog signal is covered into 8 bit digital format using an ADC. The sampling rate is set at 2.5 Khz. The DPCM Demodulator receives the serial data, converts it into 8 bit parallel format. The Digital to Analog converter transforms the 8 bit parallel data into analog level. Thus the output of DAC is a stepped approximation of input signal. A low pass filter is used to recover the analog signal. Practical experience on this board carries great educative value for Science and Engineering Students.

Object:

  • To study Differential Pulse Code Modulation & Demodulation

Features:

The board consists of the following built-in parts :

  • 5V D.C. at 100mA IC regulated power supply internally connected
  • ±12V D.C. at 100mA IC regulated power supply internally connected
  • -5V D.C. to + 5V D.C. Variable D.C. output
  • Audio Frequency Oscillator 10Hz to 100Hz for modulation
  • DPCM Modulator (DPCM ENCODER)
  • DPCM Demodulator (DPCM DECODER)
  • 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

Other Apparatus Required :

  • Dual Trace Cathode Ray Oscilloscope 20MHz
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