Friday, August 15, 2014

Pulse Code Modulation and Demodulation


Objective : 
a) Observe the conversion of DC Signal in to Digital Signal using Sample & Hold and A/D Converter
b) The PCM system is divided in five blocks i.e. Clock Generator, Sample & Hold Amplifier, Analog to Digital Converter, Multiplexer, Timing & Control Logic.
Technical Specification :
* In built IC based DC Regulated Power Supply ±12V, +5/ 500mA
* On board DC supply as modulating signal 0-5V DC.
* On board Clock Signal Generator, Frequency : 7.8KHz & 125KHz, Amplitude : 5Vpp Approx.
* Modulation using Sample & Hold Amplifier IC LF 398, Analog to Digitalk Converter using IC 0800, Parallel to Serial Converter using IC 74150 multiplexer & Timing and Control Logic using 74160.
* Demodulation of PCM using timing & control using 74160, Digital to Analog Converter using IC 0800 and Low Pass Filter follow by an amplifier using IC 741
* Glass Epoxy PCB used as front panel & mounted on light weight shock proof plastic cabinet
Power Requirement : 220V AC ±10%, 50Hz
Standard Accessories : Patch Cords & Instruction Manual
Optional Accessories : CRO 20MHz & Digital Multimeter

No comments:

Post a Comment