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K-16 ADAPTIVE DELTA MODULATION/ DEMODULATIONK16
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Objective:
• To construct and study the operation of Adaptive Delta Modulation and Demodulation.
Introduction:
• This trainer provides all necessary inputs and connections for students to study Delta, Adaptive Delta and Delta Sigma Modulation Demodulation. In signal communication operating at low frequencies or speech communication a saving in bandwidth can be resulted using Delta Modulation and its associated techniques because this requires single encoding of sample. This trainer cover Delta, Adaptive Delta and Delta Sigma Modulation and Demodulation.
o Sampling frequency.
o Sampling step size.
o Input amplitude.
These variables help in comparing the effect of sampling frequency, quantisation noise, signal to noise ratio, frequency slope overload, amplitude overload on various modulation systems. Various test points at input of every block are provided for easy observation by oscilloscope. In digital communication specially operating at low frequencies or speech, communication a saving in bandwidth can be result using delta modulation and its associated techniques because this requires single bit encoding of sample Delta Adaptive Delta Modulation / Demodulation Trainer
Description
Features of the Trainer:
• Both transmitter and receiver are on same board.
• Clock generation from crystal.
• Switch selectable sampling rates.
• 4 on board synchronized generators at 4 different frequencies.
• Separate adjustable DC level
• Selectable integrator gain setting ( by switching or control circuit ).
• On board 4th order butterworth Low Pass F!lter.
• Bistable level changer circuit with Unipolar to Bipolar conversion on board.
Specification:
Crystal Frequency
4.096 MHz..
Sampling Clock Frequency
32 KHz, 64 KHz, 128 KHz, 256 KHz.Switch Selectable
On Board Generator
Synchronized & Adjustable Amplitude Sinewave.
Integrator
4 Integrator gain settings.Normal, x 2, x 4, x 8.
Low Pass Filter
4th Order Butter worth ( 3.4 KHz cut -off).
Test Points
59.
Power supply
Voltage range : AC 100V – 230V.Frequency Range : 50 – 60Hz.
This trainer is a glass-epoxy printed circuit board and all the symbols screen-printed on the front panel so that it enables the student to conduct the experiments easily.
Accessories:
- 4mm multi coloured moulded patch cords with daisying facility.
- Computer simulated outputs and Step-By-Step detailed instructions are provided with the instruction manual.
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