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A Company Selling Technology and not just a Product


DIGITAL COMMUNICATION


Data transmission, digital transmission, or digital communications

is the physical transfer of data over a point-to-point or point-to-

multipoint communication channel. Examples of such channels

are copper wires, optical fibers,wireless communication

channels,

storage media and computer buses. The data are represented as

an electromagnetic signal, such as an electrical voltage, radio-

wave, microwave, or infrared signal.

What is Digital Communication?

Products offered by Akademika


DCL-01 : Analog Signal Sampling And Reconstruction Kit

DCL-02 : PAM Time Division Multiplexing / Demultiplexing

Kit

DCL-03 : Pulse Code Modulation Kit

DCL-04 : Pulse Code Demodulation Kit

DCL-05 : Data Conditioning And Reconditioning Kit

DCL-06 : ASK / PSK / FSK Modulation And Demodulation

Kit

DCL-07 : Delta / Sigma Delta And Adaptive Delta

Modulation Demodulation Kit

DCL-08 : Pulse Amplitude / Pulse Width / Pulse Position

Modulation / Demodulation Kit

DCL-01

“DCL-01: Analog Signal Sampling And Reconstruction Kit” is an introductory trainer kit to understand the principles of Analog Signal Sampling and Reconstruction.

This unit provides the user sine wave of two different frequencies (1 KHz and 2 KHz), whose amplitude can be varied from 0V to 5V by using the pots P1 and P2

respectively.

All onboard signals are Phase-Locked, to enable the learner to observe a stationary signal on an oscilloscope.



DCL-01 : Analog Signal Sampling and Reconstruction Kit

DCL-02

• “DCL-02: TDM Pulse Amplitude Modulation / Demodulation Kit” provides facilities for experimentation in the area of Time Division Multiplexing and Pulse Amplitude Modulation.

• An onboard Function Generator provides four synchronized amplitude variable sine waves: 250Hz, 500Hz, 1 KHz, 2 KHz, and an amplitude variable DC level for generation of

synchronization pulses. The 32 KHz-sampling clock and 8 KHz channel identification signal are also generated onboard.

• On each Receiver channel, a 4th order Low Pass Butterworth Filter is provided with cut-off frequencies of 3.4 kHz, to obtain reconstructed signals from the de-multiplexed and

demodulated signals.



DCL-02 : PAM Time Division Multiplexing / Demultiplexing Kit

DCL-03 and DCL-04

• “DCL-03” and “DCL-04” initiates the user to understand the fundamentals of Pulse Code Modulation Techniques.

• The various principles of Pulse Code Modulation, such as Sampling, Multiplexing, Quantizing and Encoding, can be studied with these trainer kits.

• The trainer also illustrates the use of parity bit for single bit error detection and Hamming Code for single bit error

detection and correction.

• Frame Synchronization using a pseudo random bit sequence (PRBS) and bit Synchronization using phase locked loops are also illustrated in these kits.



DCL-03 : Pulse Code Modulation Kit


DCL-04 : Pulse Code Demodulation Kit

DCL-05

DCL-05 initiates the user to the various Data Conditioning and Reconditioning Techniques, normally adopted in practice.

The System illustrates the use of the following data formats:

a) Non Return to Zero - Level (NRZ-L) b) Non Return to Zero - Mark (NRZ-M) c) Non Return to Zero - Space (NRZ-S) d) Unipolar Return to Zero (URZ) e) Biphase - Level (Biphase-L) f) Biphase - Mark (Biphase-M) g) Biphase - Space (Biphase-S) h) Alternate Mark Inversion (AMI) i) Unipolar To Bipolar


The trainer comes with an onboard data simulator, which

generates the NRZ-L pattern depending on positions of 8-bit switch and the reference clock (266 KHz), which enables the trainers to work in a stand-alone mode.

Interconnection facilities: Sockets and patch chords are provided for on board connections. Test Points : All relevant test points are brought-out for observations. Observations are carried out on an oscilloscope.

Power Supply -12V, +5V, GND.



DCL-05 : Data Conditioning And Reconditioning Kit

DCL-06

The trainer comes with an onboard data simulator, which generates the NRZ-L pattern depending on positions of 8-bit switch and the reference clock (256 KHz), which enables the trainers to work in a stand-alone mode.

Three carrier modulation options are available on the kit.

a) Amplitude Shift Keying (ASK)

b) Frequency Shift Keying (FSK)

c) Phase Shift Keying (PSK).



DCL-06 : ASK / PSK / FSK Modulation and Demodulation Kit

DCL-07

“DCL-07: Delta / Sigma / Adaptive Delta Modulation And Demodulation Kit” is a compact single board unit in wooden casing and it provides hands on experimentation in the area of Delta Modulation/Demodulation, Adaptive Delta Modulation/Demodulation, Sigma Delta Modulation/ Demodulation, CVSD, Compressor and Expander and also Voice Modulation an/Demodulation techniques.

This unit contains onboard function generator, which provides Synchronized amplitude variable sine waves of 250Hz, 500Hz, 1 KHz and 2KHz and DC signal with variable amplitude. The unit has provision to accept external sine wave. Selectable clock frequency for modulation makes this kit ideal for experimentation.



DCL-07 : ASK / PSK / FSK Modulation and Demodulation Kit

DCL-08

“DCL-08 : PAM / PWM / PPM Modulation trainer kit” provides experimentation in the area of Pulse Modulation/ Demodulation Techniques such as Pulse Amplitude Modulation (PAM), Pulse Width Modulation (PWM) and Pulse Position Modulation (PPM).

An onboard sine wave generator provides two synchronized amplitude variable sine waves of 500Hz and 1 KHz and one synchronized amplitude (0-2vpp) & Frequency (1-30Hz) variable sine wave. The unit has provision to accept external sine wave as input. An onboard clock generator circuit provides clock frequency of 8 KHz and 16 KHz for sampling circuit.


DCL-08Pulse Amplitude / Pulse Width / Pulse Position Modulation / Demodulation Kit


AKADEMIKA LAB SOLUTIONSEL-107, MIDC,T.T.C. Electronic Zone, Mahape, Navi Mumbai - 400710.

Tel. : +91 22 27670581/82/83 Fax : +91 22 27670583E-mail : [email protected], Website : www.akademika.in


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