View
225
Download
2
Category
Preview:
Citation preview
Advanced Digital Communication TrainerModel: DMT-1000
CYBER NOMADS
11,Indrapuri, 101, Prabhdeep Indore - 452 017Ph.:+91-731-4048492, 9993018479
E-mail: anitag@cyber-nomads.commaking 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
1
Model: DMT-1000
1
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 >
2
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
Advanced Digital Communication Trainer
Advanced Digital Communication Trainer
3
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
4
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
Advanced Digital Communication Trainer
5
-. PCM experiment
-. PPM experiment
Advanced Digital Communication Trainer
6
-. PWM experiment
-. Digital Demodulation experiment
Advanced Digital Communication Trainer
7
-. ASK Modulation Simulation experiment
-. FSK Modulation Simulation experiment
Advanced Digital Communication Trainer
8
-. MSK Modulation Simulation experiment
-. QAM Modulation Simulation experiment
<Pls note Software English conversion work is progressing>
9
Advanced Digital Communication Trainer
< 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: anitag@cyber-nomads.commaking it happen...
Cyber Nomads
Recommended