Pulse Code Modulation

Pulse Code Modulation .
Experimental Training Board has been designed specifically to study Pulse Code Modulation & Demodulation Trainer. In the basic PCM 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 8 bit parallel data from ADC is converted into serial bit stream at 33 kbps. The PCM Demodulator receives the serial data, converts it into 8 bit parallel format. The Analog to digital 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 Pulse Code Modulation & Demodulation

• 5V D.C. at 100mA IC regulated power supply internally connected
• ± 15V D.C. at 100mA IC regulated power supply internally connected
• + 5V D.C. to -9V Variable D.C. output
• Built in TTL Clock Generator 33 KHz
• Modulating Signal Generator 15Hz to 300Hz
• PCM Encoder
• PCM Decoder
• Data display with LED’s
• 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

• Cathode Ray Oscilloscope 20MHz