TDM Pulse Code Modulation-Transmitter

TDM Pulse Code Modulation Transmitter and Receiver-Scientech

Description

Description

TDM Pulse code modulation/Transmitter TechBook Scientech 2153 & Scientech 2154 Demonstrates Pulse Code Modulation Technique which is the most widely used digital modulation system. It is a widely known fact that the analog modulation systems are most prone to the noise present in the channel and receiver. As we will see further that the digital modulation systems are far less sensitive to noise as compared to analog modulation. The basis of digital modulation systems lies on pulse modulation i.e. a particular characteristic of the pulse is varied in accordance with the information signal. In PCM System the amplitude of the sampled waveform at definite time intervals is represented as a binary code.
Technical Specifications

Crystal Frequency : 16MHz

On Board Analog Signal : 2 KHz, 4 KHz (sine wave synchronized to sampling pulse Adjustable amplitude and separate variable DC level).

Input Channels : Two

Multiplexing : Time Division Multiplexing

Modulation : Pulse Code Modulation

Sync Signal : Pseudo Random Sync Code Generator

Error Check Code : Off - Odd - Even - Hamming

Operating Mode : Fast: 320 KHz / channel (approx) Slow: 1.9Hz/ channel (approx.)

Test Points : 50 nos

Interconnections : 2 mm Sockets

Power Supply : 100-240 V AC, 50/60Hz

Features

• Input accepts two channel multiplexed data

• On board De-multiplexed PCM Receiver

• On board Low Pass Filters

• Fast & Slow modes for real time operation and data flow examination

• On board PLL for Clock regeneration

• On board Sync Code Detector

• Error check code selection

• Odd or Even Parity-Single bit error detection

• Hamming code single bit error detection and correction

• 4 Switched faults allow different error check code option

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