Differential Pulse Code Modulation And Demodulation Trainer For Electrical Lab Training

Experimental training board has been designed specifically to study differential pulse code modulation & demodulation. 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. Weight : 3 Kg. (Approx.) Dimension : W 340 x H 110 x D 210 OTHER APPARATUS REQUIRED* Dual Trace Cathode Ray Oscilloscope 20MHz.