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The unit is one of a range of digital communication trainers and provides all necessary inputs and connections for students to study pulse amplitude modulation / demodulation techniques, time division multiplexing and demodulation of signals and signal reconstruction.
Features:
- Functional blocks indicated via on board mimics
- Test points
- Fully documented student workbook
- Crystal controlled clock
- On-board sine Generator (Synchronised)
- On-board pulse generator
- Demonstrates sampling and reconstruction as per Nyquist criterion
- 4 Analogue input channels samples and Time Division Multiplexed
- 5 Selectable Sampling Frequencies
- Pulse duty cycles selectable
- Internal / External sampling selectable
- 4 channels Demultiplexer
- Generation of clock at receiver by PLL system
- 4th order Butterworth L. P. Filters
Experiments:
- Study of pulse amplitude modulation technique
- Study of time division multiplexing and demultiplexing
- study of PLL as frequency to generate clock from sync signal
- Study of effect of varying duty cycle of sampling pulse on signal reconstruction
- Study of 3 modes of operation to regenerate original signal
- 3 Connections between transmitter and receiver (clock, sync and information)
- 2 connections (sync and information). Clock regenerated at receiver
- 1 Connection (information only). Clock and sync derived at receiver
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