Understanding Digital Communication Principles.

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s Understanding Digital Communication Principles Scientech

to provide a modern, portable, comprehensive and practical

Each TechBook is provided with detailed Multimedia learning

to conduct the experiment and other useful information.

communication applications where the principles of data

These portable learning platform series provides a modern,

1 s Understanding Digital Communication Principles Scientech TechBooks are compact and user friendly learning platforms to provide a modern, portable, comprehensive and practical way to learn Technology. Each TechBook is provided with detailed Multimedia learning material which covers basic theory, step by step procedure to conduct the experiment and other useful information. The digital revolution has resulted in many digital communication applications where the principles of data transmission are applied. These portable learning platform series provides a modern, Comprehensive and practical subject content of the field of digital communication. Using extensive hands on practice on different topics covered in these handy self contained TechBooks, students can understand the subject in a better way.

PAM, PPM, PWM and Line Coding Techniques Scientech

on PAM, PPM, PWM and Line Coding Techniques.

of sampling, Natural, Flat top, sampled and hold

arbitrary signals Selectable sampling frequencies for

board 2nd order Butterworth low pass filter SMD LED

CVSD Modulator & Demodulator Scientech TechBook 2802

Modulator and Demodulator on same board Arbitrary

respective line speed On board Transmission effect On

2 PAM, PPM, PWM and Line Coding Techniques Scientech TechBook 2801 provides an extensive hands on learning on PAM, PPM, PWM and Line Coding Techniques. Modulator and Demodulator on same board Different type of sampling, Natural, Flat top, sampled and hold On-board DDS Signal Generator for standard and arbitrary signals Selectable sampling frequencies for PAM Selectable Ramp frequencies for PWM and PPM On board 2nd order Butterworth low pass filter SMD LED Indicators s Scientech 2801 Scientech 2802 PCM, DPCM, CVSD Modulator & Demodulator Scientech TechBook 2802 provides an extensive hands on learning on PCM, DPCM, CVSD Modulator & Demodulator. Natural Sampled Output PWM Output PCM, DPCM, CVSD Modulator and Demodulator on same board On-board DDS Signal Generator for standard and Arbitrary signals Selectable sampling frequencies with respective line speed On board Transmission effect On board 2nd order Butterworth Low Pass filter SMD LED indicators s PCM output Filter effect

Delta, Adaptive Delta, Sigma Delta Modulator &

extensive hands on learning on Demodulator.

Signal Generator for standard and Arbitrary signals

Transmission effect Selectable step size for

slope overloading On board 2nd order Butterworth Low

Scientech 2804 4-Channel TDM-PCM Transmitter &

Scientech TechBook 2804 provides an extensive hands

On-board four DDS Selectable Sampling frequencies

SMD LED indicators Compact and Light Weight Variable

3 Delta, Adaptive Delta, Sigma Delta Modulator & Demodulator Scientech TechBook 2803 provides an extensive hands on learning on Delta, Adaptive Delta, Sigma Delta Modulator & Demodulator. Modulator and Demodulator on same board On-board DDS Signal Generator for standard and Arbitrary signals Selectable Sampling Frequencies On board Transmission effect Selectable step size for Integrator Detailed study of granular noise and slope overloading On board 2nd order Butterworth Low Pass filter SMD LED Indicators Scientech 2803 Scientech Channel TDM-PCM Transmitter & Receiver Granular noise effect Slope overload effect Scientech TechBook 2804 provides an extensive hands on learning on 4-Channel and 2-Channel TDM-PCM Transmitter & Receiver. TDM-PCM Transmitter & Receiver on same board On-board four DDS Signal Generator for standard and Arbitrary signals Selectable Sampling frequencies On board four 2nd order Butterworth Low Pass filter SMD LED indicators Compact and Light Weight Variable step size PCM output w.r.t clock TDM PCM output

Digital Companding A-Law and ì-law Scientech

learning on Digital Companding A-Law and ì-law.

board Standard table verification of A-Law and

Signal Generator Scientech 2805 Scientech 2806

applications Scientech TechBook 2806 provides an

x(t) + n(t). Selectable Signal frequencies.

4 Digital Companding A-Law and ì-law Scientech TechBook 2805 provides an extensive hands on learning on Digital Companding A-Law and ì-law. Compression and Decompression of data on same board Standard table verification of A-Law and ì-law Compression and Decompression On-board DDS Signal Generator Scientech 2805 Scientech 2806 Understanding Noise Generator and its applications Scientech TechBook 2806 provides an extensive hands on learning on Noise Generator and its applications. Compressed Signal Detailed study & analysis of Signal with & without Noise. Complete study of mathematical equation y(t) = x(t) + n(t). Selectable Signal frequencies. On-board DDS Signal Generator for standard and arbitrary signals Input and Recovered Signal Noisy output AWGN Noise Compressed and Recovered Signal

5 ASK, FSK, BPSK, DBPSK Modulator & Demodulator Scientech TechBook 2807 provides an extensive hands on ASK, FSK, BPSK, DBPSK Modulator & Demodulator. ASK, FSK, BPSK, DBPSK Modulator & Demodulator on same board Personalized Learning platform On-board Data Generator with various data patterns Selectable data frequencies and data patterns DDS technology based Carrier Generator SMD LED indicators Scientech 2807 Scientech 2808 QPSK, OQPSK, DQPSK Modulator & Demodulator ASK FSK Scientech TechBook 2808 provides an extensive hands on learning on QPSK, OQPSK, DQPSK Modulator & Demodulator. QPSK, OQPSK, DQPSK Modulator & Demodulator on same board Personalized Learning platform On-board four variable line speed rates and single bit data pattern. On board DDS technology based Carrier Generator SMD LED indicators OQPSK QPSK DQPSK (I-Channel)

6 Scope of Learning Scientech 2801 PAM, PPM, PWM and Line Coding Techniques Pulse Amplitude Modulation & De-modulation Study and analysis of Pulse Amplitude Modulation. Study and analysis of Nyquist Sampling Rate. Study and analysis of Natural Sampling with different types of message signals at different frequencies. Study and analysis of Flat top Sampling with different types of message signals at different frequencies. Study and analysis of Sample & Hold output with different types of message signals at different frequencies. Study and analysis of under sampling by varying the message frequency and sampling rate. Study and analysis of Second order Low Pass Butterworth filter. Study and analysis of Pulse Amplitude Demodulation of Sample & Hold output with Second Order Low Pass Butterworth filter. Analyze all these Natural sampling, Flat top sampling and Sample & Hold output simultaneously and observe the difference. Scientech 2802 PCM, DPCM, CVSD Modulator & Demodulator Study and analysis of Pulse Code Modulation. Study and analysis of Sample & Hold output by varying the Sampling as well as Signal frequency. Study and analysis of Parallel to Serial conversion by varying the Line speed clock. Study and analysis of single bit PCM output at different Line speed clock. Study and analysis of Pulse Code Demodulation. Study and analysis of Serial to Parallel conversion. Analyze the final PCM demodulated output with Second Order Low Pass Butterworth filter. Scientech Channel TDM-PCM Transmitter & Receiver Time Division Multiplexing & Demultiplexing with Pulse Code Modulation Study and analysis of 2 channel & 4 channel Time Division Multiplexing Study and analysis of Sample & Hold output at different channel by varying the Sampling as well as Signal frequency. Study and analysis of Parallel to Serial conversion by varying the line speed clock at the different channel. Study and analysis of single bit PCM output at different line speed clock at the different channels. Study and analysis of single bit multiplexed PCM output at Modulator side. Study and analysis of single bit demultiplexed PCM output at Demodulator side. Study and analysis of Pulse Code Demodulation at the different channel. Study and analysis of Serial to Parallel conversion at the Demodulator. Analyze the final demodulated output with Second order Low Pass Butterworth filter. Scientech 2805 Digital Companding A-Law and ì-law A-Law and µ-law Companding Study and analysis of A-law Compression. Study and analysis of ì-law Compression. Study and analysis of A-law Decompression. Study and analysis of ì-law Decompression. Scientech 2803 Delta, Adaptive Delta, Sigma Delta Modulator & Demodulator Delta Modulator & Demodulator Study and analysis of Delta Modulation and Demodulation. Study and analysis of Sample & Hold output by varying the Sampling as well as Signal frequency. Study and analysis of Integrator output at the Modulator by varying the Sampling frequency. Study and analyze the improved Integrator output by varying the gain control frequency. Study and analysis of the Slope Overload distortion problem. Study and analysis of the Granular Noise problem. Study and analysis of single bit Delta modulated PCM output. Study and analysis of Integrator output at the Demodulator. Analyze the final Delta demodulated output with Second order Low Pass Butterworth filter. Scientech 2806 Understanding Noise Generator and its applications Study of different types of Noise and their frequency spectrum White Noise Additive White Gaussian Noise Pseudo Random Noise Practical implementation of mathematical equation : y(t) = x(t) + n(t) Study and analysis of Signal to Noise ratio- By varying Noise amplitude By varying Signal amplitude Study and analysis of eye pattern with and without Noise.

Scientech 2807 ASK, FSK, BPSK, DBPSK Modulator & Demodulator Scientech 2808 QPSK, OQPSK, DQPSK Modulator & Demodulator Amplitude Shift Keying Modulation & Demodulation Objectives: Study and analysis

Frequency Shift Keying Modulation & Demodulation Objectives: Study and analysis of Frequency Shift Keying Modulation Study and analysis of Frequency Shift Keying Demodulation.

7 Scientech 2807 ASK, FSK, BPSK, DBPSK Modulator & Demodulator Scientech 2808 QPSK, OQPSK, DQPSK Modulator & Demodulator Amplitude Shift Keying Modulation & Demodulation Objectives: Study and analysis of Amplitude Shift Keying Modulation Study and analysis of Amplitude Shift Keying Demodulation. Study and analysis of Integrator and Comparator block. Frequency Shift Keying Modulation & Demodulation Objectives: Study and analysis of Frequency Shift Keying Modulation Study and analysis of Frequency Shift Keying Demodulation. Study and analysis of Integrator and Comparator block. Binary Phase Shift Keying Modulation & Demodulation Objectives: Study and analysis of Binary Phase Shift Keying Modulation. Study and analysis of Binary Phase Shift Keying Demodulation. Study and analysis of Integrator and Comparator block. Differential Binary Phase Shift Keying Modulation & Demodulation Objectives: Study and analysis of Differential encoder and decoder. Study and analysis of Differential Binary Phase Shift Keying Modulation. Study and analysis of Differential Binary Phase Shift Keying Demodulation. Quadrature Phase Shift Keying Modulation and Demodulation Objectives Study and analysis of QPSK Modulation and Demodulation with variable bit pattern and frequency. Study and analysis of 2 bit encoding as I-Channel & Q-Channel encoding and decoding. Study and analysis of Integrator and Comparator at the Demodulator end. Offset Quadrature Phase Shift Keying Modulation and Demodulation Objectives Study and analysis of OQPSK Modulation and Demodulation with variable bit pattern and frequency. Study and analysis of 2 bit encoding as I- Channel & Q-Channel encoding and decoding. Study and analysis of offset encoding and decoding. Study and analysis of Integrator and Comparator at the Demodulator end. Diffrential Quadrature Phase Shift Keying Modulation and Demodulation Objectives Study and analysis of DQPSK Modulation and Demodulation with variable bit pattern and frequency. Study and analysis of 2 bit encoding as I-Channel & Q-Channel encoding and decoding. Study and analysis of differential encoding and decoding. Study and analysis of Integrator and Comparator at the Demodulator end.

8 Technical Specifications Techniques: PAM, PPM, PWM. Line Coding PCM, DPCM, CVSD Delta, Adaptive Delta, Sigma Delta First & Second Order Modulator TDM- PCM 2-Channel & 4-Channel Digital Companding A-Law, -Law Understanding Noise Generator and its applications ASK, FSK, BPSK, DBPSK QPSK, OQPSK, DQPSK Internal Signal Generator : Direct Digital Synthesizer Types of Signal : Sine Cosine Square Triangle Arbitrary Signal Variable Frequency Internal Data Pattern Generator : 8 Bit/ 16 Bit/ 32 Bit/64 Bit Data Pattern Frequency Sampling/Ramp Frequencies Line Speed Input through DIP switch External Signal Maximum Input Voltage : 3Vpp (Max.) +1.5V DC offset Frequency : 500Hz to 3.5KHz SMD LED Indicators Crystal Frequency Selection Mode : Push switches / Toggle switches 20MHz 8MHz 8MHz 8MHz 8MHz 8MHz 8MHz 8MHz Transmission Effect: Attenuation, Noise, Filter Low Pass Filter Digital Filter : Decimation filter (16:1) Gain Selection for Modulating Signal Gain Selection for Noise Test Points Learning Material Dimensions (mm) : W 326 x D 252 x H 52 Power Supply : 110V - 260V AC, 50/60Hz Weight : 1.5Kg (Approximately) Operating Condition : 0-40 C, 85% RH Included Contents : 2mm Patch cord - 2nos Designed & Manufactured by-

DIGITAL COMMUNICATION

DIGITAL COMMUNICATION TRAINING LAB Digital communication has emerged to augment or replace the conventional analog systems, which had been used widely a few decades back. Digital communication has demonstrated