PAM, PPM, PWM Techniques and Line Coding Techniques

Description

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.

Scientech TechBook 2801 provides an extensive hands on learning on PAM, PPM, PWM and Line Coding Techniques.

Product Features

• 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
• Can be issued just like a book for hands-on learnings

Scope of Learning

PAM Modulator & Demodulator

• Pulse Amplitude Modulation(PAM).
• Nyquist sampling rate.
• Natural sampling with different types of message signals at different frequencies.
• Flat top sampling with different types of message signals at different frequencies.
• Sample & Hold output with different types of message signals at different frequencies.
• Under sampling by varying the message frequency and sampling rate.
• Second order Low Pass Butterworth filter.
• 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.

Line Coding Techniques

• Different Line Coding techniques.
• Different 8-Bit, 16-Bit and 32-Bit Pattern Generator by changing Pattern selection.
• NRZ Unipolar.
• NRZ Polar.
• RZ Bipolar.
• RZ Unipolar.
• Manchester.
• Analyze all types of Line coding outputs simultaneously and observe differences.

PWM Modulator & De-modulator

• Pulse Width Modulation(PWM) and Demodulation.
• Single bit PWM output by varying the Ramp frequency and signal type.
• PWM demodulated output by varying the Ramp frequency.
• Sample & Hold output of demodulated PWM signal.
• Second order Low Pass Butterworth filter.
• Analyze the final PWM demodulated output with Second order Low Pass Butterworth filter.

PPM Modulator & De-modulator

• Pulse Position Modulation(PPM) and Demodulation
• Single bit PPM output by varying the Ramp frequency and signal type.
• Sample & Hold output of demodulated PPM signal.
• Second order Low Pass Butterworth filter.
• Analyze the final PPM demodulated output with Second order Low Pass Butterworth filter.
• Technical Specification

Internal Signal Generator: Direct Digital Synthesizer

• Types of Signal: Sine, Square, Triangle, Arbitrary signals.
• Frequency: 500Hz, 1KHz, 2KHz, 3KHz

External Signal:

• Types of Signal: Sine, Square, Triangle, Arbitrary signals
• Maximum Input Voltage: 3Vpp (Max.) +1.5V DC offset
• Frequency: 500Hz to 3.5KHz

Sampling/Ramp Frequencies: 1.25KHz, 2.50KHz, 5KHz, 9.80KHz, 19.53KHz, 39.06KHz, 78.13KHz

SMD LED Indicators: 46 nos for DDS signal selection DDS signal frequency selection Sampling selection Technique Selection Interconnect path

Crystal Frequency: 20MHz

Selection Mode: Push switches

Random Data: 8 Bit/ 16 Bit/ 32 Bit

Data Frequency: 500Hz, 1KHz, 2KHz, 3KHz

Test Points: 29 nos.

Low Pass Filter: Cut-off frequency-5KHz

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