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Company Selling Technology and not just a Product
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Company Selling Technology and not just a Product
What is Digital Communication?
 Data
transmission,
digital
transmission,
or
digital
communications is the physical transfer of data over a point-topoint 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, radiowave, microwave, or infrared signal.
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Company Selling Technology and not just a Product
Products offered by Akademika
 DCL-BPSK : BPSK / DPSK / DEPSK Modulation And
Demodulation Kit
 DCL-QPSK : QPSK / DQPSK Modulation And Demodulation
Kit
 DCL-QAM
: QAM / DQAM Modulation / Demodulation Kit
 DCL-DPCM : DPCM / ADPCM Modulation / Demodulation Kit
 DCL-BBT
: Base Band Digital Transmission System Kit
 DCL-GMSK : GFSK / GMSK Modulator / Demodulator Kit
 DCL-CONV : Convolution Encoder And Viterbi Decoder Kit
 DCL-CRC
: CRC Encoder / Decoder And MSK Modulation /
Demodulation Kit
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Company Selling Technology and not just a Product
DCL-BPSK
 “ADCL-01” initiates the user to the various Data Conditioning
and Carrier Modulation Techniques, normally adopted in
practice.
 The Digital data in the systems can be encoded in several
formats. All these waveforms can be broadly classified into the
following four groups : 1. Non-return to Zero formats,
2. Return to Zero formats,
3. Phase encoded formats,
4. Multilevel binary formats.
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Company Selling Technology and not just a Product
DCL-BPSK : BPSK / DPSK / DEPSK Modulation / Demodulation Kit
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Company Selling Technology and not just a Product
DCL-QPSK
 “DCL-QPSK initiates the user to QPSK / DQPSK Modulation
and Demodulation technique adopted in practice.

The trainer comes with an onboard data simulator, which
generates the NRZ-L pattern depending on positions of 8-bit
switch and data clock of 256 KHz.

The Digital data in the systems can be encoded in several
formats. All these waveforms can be broadly classified into the
following four groups:
1. Non-return to Zero formats
2. Return to Zero formats
3. Phase encoded formats
4. Multilevel binary formats
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Company Selling Technology and not just a Product
DCL-QPSK : QPSK /DQPSK Modulation And Demodulation Trainer Kit
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Company Selling Technology and not just a Product
DCL-GMSK
•The trainer comes with an onboard data simulator, which generates the
NRZ-L pattern depending on positions of 8-bit switch and data clock of 256
KHz which enables the trainers to work in a stand-alone mode.
•Two carrier modulation options are available on the kit.
• Gaussian Minimum Shift Keying. (GMSK).
• Gaussian Frequency Shift Keying. (GFSK).
•Following options are available for detecting the information from the
carrier:
•“DMOD I” and “DMOD Q” signals which are the output of the LPF of
GMSK Demodulator.
•GFSK demodulation using Zero crossing detection techniques.
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Company Selling Technology and not just a Product
DCL-GMSK
•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 DSO.
•Power Supply:
+5V, +12V,-12V, GND.
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Company Selling Technology and not just a Product
DCL-GMSK: GFSK / GMSK Modulator / Demodulator Kit
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Company Selling Technology and not just a Product
DCL-BBT
•DCL-Base Band Digital Transmission System kit is an Advanced
Digital Communication Trainer kit.
•A single board unit designed to learn the fundamentals of base
band digital transmission system including properties of transmitter
and receiver filters, Pulse Amplitude Modulation of binary data, Band
Limiting, observation of Eye Pattern, Bit Error Rate measurement,
study of coding operation like Scrambling and Unscrambling.
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Company Selling Technology and not just a Product
DCL-BBT : Base Band Digital Transmission System Kit
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Company Selling Technology and not just a Product
DCL-QAM
 “DCL-QAM ” initiates the user to the various Data Conditioning
and Carrier Modulation Techniques, normally adopted in
practice.
 The System illustrates the use of the following data formats :
a) Non Return to Zero - Level (NRZ-L),
b) Tribit encoded data
c) Differentially encoded EVEN & ODD.
 The trainers come with an onboard data simulator, which
generates the NRZL pattern depending on the positions of \
switches of 8-bit DIP switch and the reference clock (256 KHz),
which enable the trainers to work in a standalone mode.
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Company Selling Technology and not just a Product
DCL-QAM : QAM / DQAM MODULATION / DEMODULATION KIT
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Company Selling Technology and not just a Product
DCL-CONV

The trainer comes with an onboard data simulator, which generates the
NRZ-L pattern depending on positions of 8-bit switch and the selectable
data clock of 256 KHz or 1 Hz which enables the trainers to work in a
stand-alone mode. The selectable data clock enables the user to
observe the convolution encoding and viterbi decoding both at slow
frequency as well as high frequency.

Convolution encoder for error correction :
- Selectable rate : K = 7, rates ½, ¾.
- Continuous mode operation
- Support for the Intelsat IESS-308/309 standard
- On-board clock selection
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Company Selling Technology and not just a Product
DCL-CONV

Viterbi decoder for error correction :
- Selectable rate : K = 7, rates ½, ¾.
- Support for Intelsat IESS-308/309 standard
- Supports both Hard decision and soft decision decoding
- 3-bit soft-quantized demodulated bits
- Single 5V supply

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 viewed on DSO.

Power Supply : +7.5V, GND
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Company Selling Technology and not just a Product
DCL-CONV : Convolution Encoder And Viterbi Decoder Kit
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Company Selling Technology and not just a Product
DCL-DPCM
 “DCL-DPCM ” initiates the user to study about the DPCM
modulation and demodulation technique with quantization error.

At the time of PCM process, the differences between input
sample signals are minimal. Differential PCM (DPCM) is
designed to calculate this difference and then transmit this small
difference signal instead of the entire input sample signal.
 Since the difference between input samples is less than an
entire input sample, the number of bits required for transmission is
reduced. This allows for a reduction in the throughput required to
transmit voice signals.
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Company Selling Technology and not just a Product
DCL-DPCM : DPCM / ADPCM Modulation / Demodulation Kit
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Company Selling Technology and not just a Product
AKADEMIKA LAB SOLUTIONS
EL-107, MIDC,T.T.C. Electronic Zone, Mahape, Navi Mumbai - 400710.
Tel. : +91 22 27670581/82/83 Fax : +91 22 27670583
E-mail : lab@akademika.in, Website : www.akademika.in
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Company Selling Technology and not just a Product