advanced digital communication trainer -...

Advanced Digital Communication TrainerModel: DMT-1000

CYBER NOMADS

11,Indrapuri, 101, Prabhdeep Indore - 452 017Ph.:+91-731-4048492, 9993018479

E-mail: [email protected] it happen...

Cyber Nomads

Advanced Digital Communication Trainer is designed for learning Basic Concepts and Functions of Digital Communication System. This Trainer has various features that are not available in the existing Digital Communication training equipments. These features are Modulation / Demodulation wave observation, Modulation Block Forming, Selection of coding and decoding methods, BER test etc. The performance of various types of receivers can be tested by using different detection circuit boards.

Also, our Trainer (DMT-100) is a transceiver and two devices communicate in real time over 900MHz band. The students can actually observe wireless communications process in detail. Especially, we have focused on the core contents of digital modulation and demodualtion scheme such as ASK, FSK, PSK. And, the concept of PCM, PWM, PAM, PPM schemes can be experimented through simulations.

. Comparison of various Demodulation Schemes

Advanced Digital Communication Trainer

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Model: DMT-1000

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2. Function

- . Comparison of FFT spectrum of Various Modulation Schemes

- . RF Transmitter/Receiver Experiment using 900MHz Band(Half Duplex)

-

Modulation

Channel Var.

RF Power Con.USB

Digital Incoding

Random Func.

Demodulation

Channel Var.

Recev. Gain Con. USB

Digital Incoding

BER TestDMT-1000BASE

DMT-1000REMOTE

RF 900MHz

1

Advanced Digital Communication TrainerModel: DMT-1000

1. Introduction

2. Function

- . Comparison of FFT spectrum of Various Modulation Schemes

- . RF Transmitter/Receiver Experiment using 900MHz Band(Half Duplex)

-

Modulation

Channel Var.

RF Power Con.USB

Digital Incoding

Random Func.

Demodulation

Channel Var.

Recev. Gain Con. USB

Digital Incoding

BER TestDMT-1000BASE

DMT-1000REMOTE

RF 900MHz

< Block Diagram >

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3. Specifications

-. Comparison of BER for various Modulation methods

-. Able to Monitor and Control the experiment using PC Software

-. Able to Test Various detection circuits

-. Can select Coding and decoding method

- . Various composition block of modulation

-. Dual mode device(Transceiver)

-. Modulation experiment of the ASK, FSK, PSK

-. Simulation Experiment of the PCM, PAM, PWM, PPM

-. Partially Spectrum Analyzing Function

-. Screen Print of Digital data

-. Modulation and demodulation simulation experiment of the ASK, PSK, FSK, MSK and QAM

Parameters Test Conditions Min. Typ. Max. Unit

Supply current

(Without Detection

Board)

No.

Supply-voltage range 11 30V

Tx mode 620 ㎃

Rx mode 630 ㎃

Half duplex mode ㎃

RF Parameters [Base mode]

VCO Frequency range 830 970 ㎒

VCO Output Level 1 ㎽

Channel spacing 50 ㎑

Tx Frequency range 902 903 904 ㎒

Tx Output Level Gain max 8 12 ㎽

Tx Gain control range 35 d

Rx Frequency range 926 927 928 ㎒

Zero IF Output Gain 45 d

Detection Board [Differential Peak]

Supply current FSK [BER 0.1%] - 3.2 4.6 ㎃

Sensitivity -90 -95 dm

Detection Board [Ratio & Envelope]

Supply current - 2.5 3 ㎃

Sensitivity FSK [BER 0.1%] -80 -83 dm

Detection Board [PLL]

Supply current - 2 7 0 3㎃

Sensitivity PSK [BER 0.1%] - 7 0 -75 dm

Detection Board [Quadrature]

Supply current 75 80 ㎃

Sensitivity PSK [BER 0.1%] dm



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4. Contents

Part 1. Pulse Mod-Demodulation

Chap1. Basic Theory

1-1. Pulse

1-2. Characteristics of Pulse Signal

1-3. Transfer of Signal

Chap2. Pulse Mod-Demodulation

2-1. Pulse Amplitude Modulation

2-2. Pulse Width Modulation

2-3. Pulse Position Modulation

Chap3. PCM (Pulse Code Modulation)

3-1. Pulse Code Modulation

3-2. Sampling

3-3. Quantization

3-4. Encoding

> Exp. 1 PAM Mod-Demodulation

> Exp. 2 PTM Mod-Demodulation

> Exp. 3 PCM Mod-Demodulation

Part 2. Digital Mod-Demodulation

Chap4. ASK (Amplitude Shift Keying)

4-1. ASK Modulation

4-2. ASK Demodulation

Chap5. FSK (Frequency Shift Keying)

5-1. FSK Modulation

5-2. FSK Demodulation

Chap6. PSK (Phase Shift Keying)

6-1. PSK Modulation

6-2. PSK Demodulation

> Exp. 4 ASK Modulation

> Exp. 5 ASK Demodulation

> Exp. 6 FSK Modulation

> Exp. 7 FSK Demodulation

> Exp. 8 PSK Modulation

> Exp. 9 PSK Demodulation

Part 3. Anomaly Modulation

Chap7. Anomaly Modulation

7-1. M-ray FSK

7-2. M-ray PSK

7-3. QAM (Quadrature Amplitude Modulation)

Chap8. Filtering

8-1. Filter

8-2. Nyquist or raised cosine filter

8-3. Gaussian filter

8-4. filter bandwidth parameter alpha

8-5. Filter Bandwidth

Chap9. Waveform

9-1. Constellation diagram

9-2. Eye diagrams

9-3. Trellis diagrams

Chap10. BER (Bit Error Rate)

10-1. Basic Concept

10-2. Noise and BER

10-3. Quantization errors

10-4. Eb/No and BER

10-5. SNR[dB]

> Exp. 10 M-ray FSK

> Exp. 11 M-ray PSK

> Exp. 12 QAM

Hardware Guide

Software Guide

Appendix

[option] DIY Experiment (11 peices)

PAM Modulation Circuit (Natural sampling)

PAM Modulation Circuit (Flat-top sampling)

PAM Modulation Circuit 1

PAM Modulation Circuit 2

PPM Modulation Circuit

PPM to PWM translation Circuit

Low Pass Filter 1

Low Pass Filter 2

Envelop Detection Circuit

Ratio Detection Circuit

Double balance mixed Detection Circuit

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5. User Interface -. Screen Shots of Main experiment.

Modulation Parameter Selection Window, Screen shot Print of Digital Data

-. Figure of PAM experiment

Modulation Block Selection window Modulation Wave Window


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-. PCM experiment

-. PPM experiment


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-. PWM experiment

-. Digital Demodulation experiment


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-. ASK Modulation Simulation experiment

-. FSK Modulation Simulation experiment


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-. MSK Modulation Simulation experiment

-. QAM Modulation Simulation experiment

<Pls note Software English conversion work is progressing>

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< This device can be upgraded by changing modules>

6. Trainer Configuration

7. Components

Transceiver 2EA

Detection board 6EA

USB Cable 2EA

Antenna 2EA

Program CD 1EA

Textbook 1EA

Adaptor(9V) 2EA

Aluminum Bag 1EA

DMT-1000 BASE DMT-1000 REMOTE

CYBER NOMADS

11,Indrapuri, 101, Prabhdeep Indore - 452 017Ph.:+91-731-4048492, 9993018479

E-mail: [email protected] it happen...

Cyber Nomads

advanced digital communication trainer -...

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