DIGITAL COMMUNICATION TRAINING SYSTEM

DIGITAL COMMUNICATION TRAINING SYSTEM

·       To understand the basic theory of digital communication system

·       Design & implementation of digital modulator & demodulator

·       Concepts & Application. Design & implementation of line code encoder & decoder.

·       Design & implementation of PCM modulators & demodulators.

·       Design & implementation of Delta modulators & demodulators

·       Design & implementation of ASK, PSK & QAM modulators &demodulators.

Specification :

Module One: Line Code Encoder & Decoder

A.  Line Code Encoder

-     Unipolar & Bipolar NRZ Signal Encoder (TTL Signal; Data Rate: 1 kbps ~ 4kbps)

-     Unipolar & Bipolar RZ Signal Encoder (TTL Signal; Date Rate: 1 kbps ~ 2.5 kbps; CLK: 2 kHz ~ 5kHz)

-     AMI Signal Encoder (TTL Signal; Data Rate: 50 bps ~ 250 bps; CLK: 100 Hz ~ 500 Hz)

-     Manchester Signal Encoder (TTL Signal; Data Rate: 100 bps ~ 400 bps; CLK: 200 Hz ~ 800 Hz)

B.  Line Code Decoder

-     Unipolar & Bipolar NRZ Signal Decoder (TTL Signal; Data Rate: 1 kbps ~ 4kbps)

-     Unipolar & Bipolar RZ Signal Decoder (TTL Signal; Date Rate: 1 kbps ~ 2.5 kbps; CLK: 2 kHz ~ 5kHz)

-     AMI Signal Decoder(TTL Signal; Data Rate: 50 bps ~ 250 bps; CLK: 100 Hz ~ 500 Hz)

-     Manchester Signal Decoder(TTL Signal; Data Rate: 100 bps ~ 400 bps; CLK: 200 Hz ~ 800 Hz)

 

Module Two: PCM Modulator & Demodulator

A. PCM Modulator

-     PCM Modulator

-     Built-in sample frequency: 8 kHz

-     Built-in Operation Frequency: 2048 kHz

-     Audio Signal: 100 Hz ~ 2 kHz

·         EP4

·         Model No – NEP0013

·         TELEPHONE EXCHANGE SYSTEM TRAINER  

·          

·         Features:
Simulates an actual indoor commercial telephony PABX system
Consists of the main controller exchange unit plus 6 units of telephone
Can linked to standard telephone and proprietary telephone
Main control system is housed in a robust and durable console base with easy access to all its wirings
Base console panel is designed with clear labelling and mimic block diagram
Base console unit is portable.
Easy maintenance and easy programming
Advanced hybrid system

Technical Specification:

PABX central control panel (1 unit)
Trainer panel is designed with clear labelling and mimic block diagram
Executive telephone with special features & LCD display (2 units)

·         Normal system telephone with LCD display (2units)
Standard telephone (2 units)
Door unit with lock (1 unit)
Bench top installation frame (1 unit)

Capacity: incoming line (3), extensions 8, 4 intercom paths
Control method: Built-in advanced microcontroller control
Advanced hybrid system
Dialing method: Pulse and tone(DTMF)
Easy maintenance and Easy Programming
Power supplies: AC 110-240V, 50/60 Hz