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  • Analog interface (POTS)
  • FXS (foreign exchange subscriber)
  • Analog line signaling
  • Command line interface (CLI)
  • Tones and cadences
  • Voice digitization, PCM encoding
  • IP voice compression algorithms
  • Time switching
  • Packet switching
  • Legacy call management: incoming, outgoing, local, long distance and international calls
  • IP – IP call management
  • PBX user features
  • PBX operator station functions
  • IP PBX features: call transfer, follow me, call forward, call waiting, parking


  • Observe Doppler radar operation
  • Determine velocity of moving object in radar range
  • Observe Doppler principle with a moving pendulum
  • Observe the alarm system
  • Counting objects
  • Detect frequency of vibration of different tuning forks
  • Determine the rotation speed (RPM) of a fan
  • Observe the effect of various materials on radar​ reception

Doppler Radar Training System

Degem’s MDC-3246 Doppler Radar Trainer is a very useful training system for laboratory for learning Doppler radar concepts and applications.

The training system is a self contained training system that includes all the necessary instruments and accessories for studying the operating characteristics a Doppler radar.

The training system includes a virtual oscilloscope with FFT to monitor, store and analyze the radar signals. The trainer can measure the linear speed of an object, vibration frequency and rotational speed (RPM). The operation of the radar with metal, acrylic, Teflon and Bakelite targets can be observed.

The student manual explains essential theoretical concepts of Doppler radars and provides a detailed experiment procedure for each experiment.

  • Complete hardware and software setup to demonstrate Doppler radar concepts
  • Radar signals can be measured at test points on the trainer as well as on the student PC
  • Object counter
  • Real time measurements of rotating and vibrating objects, such as tuning forks
  • Virtual oscilloscope measures Doppler frequency shift
  • LED indicator for Doppler echo signal
  • Alarm for detected signals
  • Tripod stand for height and level matching


  • Polar plots & polarization
  • Wave modulation & demodulation
  • Antenna gain, Antenna beam width study
  • Element current, front-back ratio study
  • Antenna matching
  • Antenna radiation with distance

Antenna Training System

Degem’s MDC-3241 Antenna Training System is an ideal training equipment to teach the important fundamentals of antennas as applied to modern communication systems.

The MDC-3241 Antenna Training System has been specially designed for engineering colleges and technical training centers. It is very useful for practical verification of antenna operating characteristics by students. All of the necessary measuring equipment and accessories are provided in the training system.

The workbook provides theoretical concepts and detailed experiment procedures for each type of antenna.

The training system includes set of modular mechanical elements forming various antennas, a transmitter unit and a detector unit. All the accessories are packed in a convenient carrying case.

  • RF and tone generators included
  • Directional coupler, matching stub, forward/ reverse meter and goniometer are also provided
  • Several experiments with different types of antennas
  • Antenna fabrication kit
  • Measure forward & reverse power
  • SWR measurements
  • Fully documented student workbook and operating manual

Fiber Optics Training System

Fiber optic cables and components have revolutionized telephone and data communications systems all over the world. The OPCOM course has been specially designed to provide efficient, practical training exercises on reasonable cost training systems using state-of-the-art components, which help reinforce the student’s comprehension of the related concepts. The student studies the important characteristics of fiber optic cables, digital and analog laser transmitters and receivers for 850nm multimode (MM), 1310nm and 1550nm single mode (SM) optical transmission, optical splitters and wave-division multiplexing devices.

The OPCOM training system consists of an active control board, a passive optics module and fiber optic cable module as well as a comprehensive instructional module designed to teach the fundamental concepts of fiber optic devices and data transmission systems to students in high schools, technical schools and colleges. The training system shows how analog and digital signals can be multiplexed and transmitted over a single wire or fiber optic link using WDM (wave division multiplexing).

Quick-connect optical connectors on all fiber optic cables and optical devices reduce set up
time and protect these components from damage. Randomly inserted faults modify the circuits under test in the active module to provide valuable true-to-life troubleshooting exercises, which develop diagnostic skills.

The MDC Modern Communications product line is designed to provide practical training for engineers and technologists in the fundamentals of analog and digital communications that are the basis of modern communications and telecommunication systems. The prime objective is to study the principles of operation of various communications techniques and their effect on real life signals such as speech, music, data and video.

​The training system consists of two service units, a base unit and six different modules:

  • MDC-3201 – Audio data acquisition service unit
  • MDC-3202 – RF service unit
  • MDC-3203 – Base unit and power supply
  • MDC-3211 – Audio and data signals
  • MDC-3212 – Source encoding and decoding
  • MDC-3213 – Baseband transmission and synchronization
  • MDC-3214 – Linear modulation and demodulation
  • MDC-3215 – Angle modulation and demodulation
  • MDC-3216 – Superheterodyne receiver 

The above two service units and six modules that plug into the four available slots in the MDC-3203 base unit to quickly configure the system for each experiment. The service units provide virtual instruments for generating and analyzing signals.


The accompanying courseware for each experiment runs in the MS-WINDOWS
environment, offers essential theory, easy to follow step-by-step experiment
procedure instructions and verifies answers to multiple-choice questions. The student courseware and instructor guide are written by pedagogical experts in modern communications technology to support every stage of the learning process.​

Modern Communication Training System

About the product

The training system family for basic communications consists of various modules that plug into the base unit at each student workstation. The student can quickly configure the student workstation to perform an individual experiment. The training system communicates to the student PC to provide virtual measuring instruments, such as a digital storage oscilloscope and spectrum analyzer.

Among the subjects that are covered by the basic communication training system: 


  • Amplitude modulation
  • SSB, DSBSC modulation
  • Angle modulation
  • Analog design​​


  •  Concepts of digital communications
  •  Pulse coded modulation
  •  Pulse coded transmission
  •  Phase shift keying
  •  Quadrature amplitude modulation
  •  Software simulation package with problem solving

The addition of Degem’s proprietary software simulation and problem solving package provides a ideal and unique basic communications laboratory.


The advanced communications and telecommunications laboratory offers a broad selection of specialized communications and telecommunications technology subjects for various technician and electronics engineering training prog​​rams.

  •  Antennas
  •  Microwave optics
  •  Microstrip components and systems
  •  GSM cellular communications
  •  CDMA cellular communications

  • ​ GSM programming
  •  GPS navigation
  •  Satellite broadcast reception
  •  PSTN & VoIP Telecommunication networks
  •  Digital position and Doppler radar
  •  And more...


Communications and Telecommunications play an ever increasing role in improving our lives In order to facilitate the learning process of the relevant principles and applications of these complex technologies, Degem has developed several training systems that introduce the student to the essential theory, provide detailed procedures for performing practical experiments on specially developed hardware and course observations which are delivered from a computer-based training (CBT) platform. This unique training program prepares the technician or engineer for various employment positions in the communications and telecommunications industry.



      Structure and operation of the satellite TV reception system

  • Familiarization with system components.
  • Connect the main receiver components:
  • 2-way power divider (splitter)
  • Analog/digital receiver
  • C/Ku LNB’s
  • Dish actuator
  • Field strength meter
  • Television
  • Oscilloscope


       Set up receiver channels carrier to noise (C/N), digital channel

       power (DCP) and AGC measurements

  • Measure the C/N in digital channel with optimal satellite beam alignment
  • Measure the C/N in digital channel with moving dish
  • Measure the C/N in analog channel with optimal satellite beam alignment
  • Measure the C/N in analog channel with moving dish
  • Measure the DCP in digital channel with optimal satellite beam alignment
  • Measure the DCP with moving dish alignment
  • Measure analog AGC output with optimal satellite beam alignment
  • Measure analog AGC output with moving dish
  • Measure digital AGC output with optimal satellite beam alignment
  • Measure digital AGC output with moving dish


       Bit Error Rate (BER) and Signal to Noise Ratio (SNR) measurements 

       in a digital channel

  • Measure the BER in a digital channel
  • Measure the post Viterbi BER
  • Measure the Reed Solomon Uncorrected BER (RU)
  • Measure SNR

Satellite Communication 

Training System

The MDC-3261 training system provides an in-depth look at basic satellite communications terminology and concepts. The system provides practical training for technicians and engineers in the fundamentals of satellite reception systems.

MDC-3261 introduces the student to theory and applications of satellite receivers. It reveals many aspects of the orbit and satellite theory; hardware; design; adjustments; engineering and operations of satellite television reception systems.

MDC-3262 is an expanded version of MDC-3261. It consists of the same satellite reception equipment, but that allows 20 students to perform experiments from 10 workstations using a local area network.

MDC-3263 expands the basic MDC-3261 training system by adding an additional workstation.

A comprehensive student theory and experiment manual details clearly all relevant aspects and experiment procedure.

GSM programming

Degem’s MDC-3253 GSM Trainer is a modem or mobile equipment for transmission of voice and data calls as well as SMS (Short Message Service) in GSM Network. To control the GSM modem, an advanced set of AT commands according to GSM ETSI (European Telecommunications Standards Institute) 07.07 and 07.05 have been implemented. The GSM standard has established itself across continents.

The trainer is well suited for studying AT commands by camping to real networks using
SIM card. An application module is supplied to show how SMS commands can control real
electrical devices.

The student manual explains essential theoretical concepts and provides a detailed
experiment procedure for each type of device.

  • Low Cost
  • Simple and easy operation
  • 􀀁Easy understanding of AT commands
  • 􀀁Real time operation
  • 􀀁External antenna
  • 􀀁Software for viewing AT commands


  • GSM theory and standards Understanding of GSM technology, its network, GSM capability and data services
  • Understanding RF environment and study of GSM
  • network by actually connecting to the GSM environment​ of any service provider.
  • Command Level Study

CDMA DSS Cellular
Communications Training System

Degem’s MDC-3251 CDMA Training System is an ideal training equipment to teach the
important fundamentals of this state-of-the-art modulation technique applied in modern
cellular communications systems to technicians and engineers.

The MDC-3251 trainer provides a basic understanding of the concepts behind CDMA,
and various issues that need to be considered in the design of a DSSS system. These
include generation of various pseudorandom (PN) codes such as Gold, MLS & Barker with
programmable taps, variable chip rate, and digital modulations BPSK, QPSK & digital
AWGN noise with programmable FIR low pass filter. Bit error rate (BER) measurement
with known data sequence, overall data rate dependency parameters, spreading & dispreading with DSSS, SNR control, offset control and so on can be performed on model MDC-3251a.

The signals at various processing points can be conveniently displayed on an oscilloscope
or on the optional PC-based logic analyzer.

  • 􀀁Simulation software
  • 􀀁Programmable CDMA DSSS transmitter
  • 􀀁Programmable CDMA DSSS receiver
  • 􀀁Programming software
  • Several communication parameters can be set by the students from their PC
  • Convenient test points for monitoring signals provided

      MDC-3201 Audio Data Acquisition Service Unit

  • Frequency translation
  • Frequency division multiplex
  • Amplitude modulation
  • Single and double sideband
  • Quadrature amplitude​ modulation
  • Correlation receiver
  • Dual analog inputs
  • Dual preamplifiers
  • Dual adjustable filters
  • 12-bit digital-to-analog and analog-to-digital​ converters
  • Dual preamplifiers
  • Audio amplifier, loudspeaker
  • Speech signal characteristics
  • Quantization
  • Pulse code modulation​ (PCM)
  • Delta modulation (DM)
  • Adaptive DM, DPCM
  • Time division multiplexing
  • Phase modulation techniques
  • Correlation of PM and FM
  • Analog and digital FM
  • Phase modulation​ techniques
  • FM detectors
  • Phase locked loop
  • Types of signals
  • Voice signal
  • Response of the human ear
  • RZ and NRZ codes
  • Multilevel PAM
  • Manchester & Miller codes

   MDC-3211 Audio and Data Signals

GPS Navigation Training System

Global Positioning System technology is rapidly changing how people find their way
around the planet. Whether it is for fun, saving lives, getting there faster, or whatever
uses you can dream up, GPS navigation is becoming more common every day.

Degem’s MDC-3252 GPS Navigation Training System is an ideal training equipment to
provide a basic understanding of the GPS fundamentals, satellites, protocols and design
aspects of a GPS Receiver by actually connecting to the navigation satellite by a GPS antenna.

The experiment manual provides essential theory and detailed instructions to carry out
the various experiments.

  • 12 channel GPS & carrier
  • Fast cold/warm/hot start, TTFF time of 45/38/8 sec
  • Fast reacquisition time of 0.1second
  • NMEA 0183 Ver2.2 GGA, GLL, GSA, GSV, RMC and VTG sentences output
  • SiRf binary protocol output
  • On-board, real time RTCM SC-104 differential
  • 1PPS (one pulse per second) signal
  • Serial port for communicating with a PC
  • GPS analysis software


  • Understanding GPS concepts
  • Establishing a link between a GPS Satellite and the GPS trainer.
  • Measurement of latitude and longitude.
  • Effect of DOP.
  • Become familiar with HDOP & VDOP.
  • Analysis of NMEA 0183 Protocols.
  • Analysis of elevation, azimuth, SNR.
  • Familiarization with PRN code.
  • Common NMEA sentence protocols: GPGGA, GPGLL,GPGSA, GPGSV,GPRMC, GPVTG
  • Study other GPS NMEA sentences: GPALM, GPGRS, GPGST, GPMSS, GPZDA.
  • UTC Data & Time.
  • Study useful conversion formulas.

   MDC-3214 Linear Modulation and Demodulation

      MDC-3213 Baseband Transmission & Synchronization

      MDC-3202 RF Service Unit

   MDC-3215 Angle Modulation and Demodulation

  • Twined binary code (TBC)
  • AMI code
  • Compare AMI with 2B1Q
  • ISI and eye patterns
  • AMI/2B1Q noise performance
  • Timing recovery
  • Frequency synthesizer
  • RF sine generators (2)
  • White noise generator
  • True RMS meter
  • Tunable bandpass filter
  • Bit error rate meter

   MDC-3212 Source Encoding and Decoding

   MDC-3216 Superheterodyne Receiver

Telecommunication Networks Training System
Analog, digital Telephony & VoIP

MDC-3281 is a unique training system that integrates state-of-the-art hardware with
interactive courseware interactive courseware for learning fundamentals of modern
electronic switching for both conventional Public Switched Telephone Networks (PSTN)
and Voice over Internet Protocol (VoIP).

A real electronic exchange, which is controlled by the student’s PC, provides practical
exercises to reinforce the theory learned. Each experiment is accompanied by detailed
procedures to guide the student through each experiment with a minimum of instructor

This course is suitable for technicians and engineers who wish to learn the basic principles
of PSTN and VoIP switching in the classroom or laboratory.

  • Computer-controlled switch
  • 8 standard PSTN telephones
  • 4 VoIP telephones
  • Lesson modularity affords easy adaptation to various training programs
  • Several vivid animations and graphics to illustrate PSTN and VoIP concepts
  • Student theory comprehension is assessed by multiple choice questions
  • Clear, step-by-step procedure for each experiment
  • No subscriber line necessary


  • Concepts of satellite communications
  • Set up direct link
  • Set up active satellite link
  • Study satellite transponder
  • Set up satellite communication link
  • Study audio-video transmission through satellite link
  • Study baseband analog signal (voice) in a satellite link
  • Transmit and receive function generator waveforms through satellite link
  • Transmit tone through satellite link
  • Establish PC-to-PC communications using satellite
  • Communication link

      Satellite transmission – channel bandwidth, transponders

  • Record list of transponders available in a specific satellite
  • Measure the gain of the channels in dBuv
  • Measure the channel bandwidth of each transponder

      Satellites link budgets – measurements and calculations

  • Calculate the elevation of the dish
  • Calculate the azimuth
  • Calculate the path distance to satellite
  • Calculate the wavelength
  • Calculate the free space loss
  • Calculate the noise factor F of the LNB
  • Calculate the total system temperature
  • Calculate the noise bandwidth (NB)
  • Calculate the figure of merit G/T

      Video signals in the reception system

  • Display a complete TV line
  • Identify the following parameters:
  • Width and amplitude of the line synchronization signal
  • Time interval between two consecutive synchronization signals
  • Location and amplitude of the color sync burst
  • Location and amplitude of the video signal
  • Display one TV field
  • Identify the following parameters:
  • Width and amplitude of the field synchronization signal
  • Time interval between two consecutive signals
  • Shape and amplitude of the video signals


  • ​​​​To study theory of Direct Sequence Spread Spectrum Modulation and Demodulation (DSSS).
  • Selection and study of various PN codes (MLS, GOLD, BARKER)
  • Generate (spreading) DSSS modulated signal.
  • 􀀁Demodulate (dispreading) DSSS modulated signal.
  • 􀀁Selection & comparative study of various code modulation techniques:

  • Modulation and Demodulation using internal generation ​ of 2047 bit PN sequence as modulator Input and unmodulated carrier.
  • 􀀁Spreading and Dispreading using additive white Gaussian noise generator and frequency offset.
  • 􀀁Perform spreading and dispreading using extensive monitoring at the receiver for code lock, carrier lock, carrier frequency offset and code acquisition.
  • 􀀁Study the effect of Synchronization. Sequential, code search in dispreading.
  • 􀀁Voice communication using DSSS concept


The following subjects are covered by the courseware:

  • Scattering Measurement
  • Attenuation Measurement
  • Splitter Measurement – Loss, Splitting Ratio, Isolation
  • WDM Measurement – Loss, Filtering, Isolation
  • Dispersion Measurement
  • Optical Sources and Transmitter Concept - Duty Cycle,​ Data Rate, Output
  • Power, Rise/Fall Time,
  • Digital Data Transmission: Ethernet, BER Measurement
  • Optical Detector and Receiver Concepts - Photodiode
  • Current Measurement
  • WDM – Wavelength Division Multiplexing
  • Data protection between 2 units
  • Analog voice transmission
  • Mixing principle
  • Image frequency
  • Noise figure and sensitivity
  • Selectivity
  • Automatic gain control​ (AGC)
  • Local oscillator with a PLL

Microwave Optics Training System

Degem’s MDC-3272 Wave and Propagation training system is an ideal training
equipment to teach the important physical properties of microwaves and propagation

The training system is a self-contained training system that includes all the necessary
instruments and accessories for studying the concepts of reflection, refraction,
polarization, standing waves, and interferometer in the 10 GHz frequency band. The
training system consists of a microwave transmitter, microwave receiver, ganiometer
scale and a number of accessories to perform a number of important experiments.

The student manual explains essential theoretical concepts and provides a detailed
experiment procedure for each topic.

  • Complete set for transmission, reception and microwave power measurements
  • Digital display for measuring relative microwave signal strength
  • Accessories supplied for reflection, refraction, polarization and interference experiments
  • Audio and voice communications
  • Detector probe for field detection
  • Accessories provided in a carrying case


  • Set and operate the transmitter and receiver
  • Standing waves and wave length measurement
  • Reflection
  • Refraction and Snell’s Law
  • Polarization
  • Double slit diffraction and interference
  • Fabry-Perot interferometer
  • Voice communications in a microwave system


  • ​Measure transmission loss and reflection loss (SWR)
  • Measure dielectric constant of substrate with ring resonator
  • Power divider: isolation and return loss
  • Branchline coupler characteristics
  • Parallel line directional coupler: coupling & directivity
  • Rat-race hybrid ring coupler characteristics
  • Low pass filter characteristics
  • Band pass filter characteristics
  • Band stop filter characteristics
  • Measure MIC amplifier gain



Microstrip Training System

Degem’s MDC-3271 Microstrip training system is an ideal training equipment to teach
the important fundamentals of modern microstrip components and their application in
microwave communication systems.

The training system is a self contained training system that includes all the necessary
instruments and accessories for studying the characteristics of any MIC component over
the frequency range 2.2 to 3GHz. The characteristics of all the microstrip components
provided over the frequency range 2.2 to 3GHz by measuring the transmission loss and
reflection loss with the provided equipment.

The student manual explains essential theoretical concepts and provides a detailed 

experiment procedure for each type of device.

  • Self contained training system
  • Microwave generator (2.2-3GHz) with integral frequency counter
  • VSWR meter simplifies SWR measurements
  • Microwave IC components
  • Gold plated components
  • Gold plated connectors
  • PC to PC data communication

Satellite Communications
Training System

The MDC-3264 Satellite Communications Trainer provides an in-depth study of a basic satellite communication system.

It consists of an uplink transmitter, satellite link and a downlink receiver, which can be conveniently placed in the laboratory. The satellite can be placed at an elevated position if needed. The satellite transponder receives the signal from the uplink transmitter and retransmits at different frequencies to a downlink receiver. The uplink and downlink frequency are selectable and can carry three signals – audio or voice, video and data simultaneously.

Any broadband signal, digital/analog data or function generator waveforms can be communicated through the satellite link. A web camera is also supplied.

The experiment manual illustrates the basic theory, contains a glossary of satellite communication terms in addition to the detailed experiment procedure.

  • Self contained training system
  • Simultaneous communication of three different signals at each up-linking frequency
  • 2414-2468MHz PLL microwave operation
  • Crystal controlled frequencies
  • Audio, video, digital data, PC data, and tone communication signals
  • Voice, function generator waveforms etc
  • Communication of external broadband digital and analog data and base band signals
  • Choice of different transmitting and receiving frequencies
  • Built-in microphone and speaker for voice and audio link
  • Detachable dish antenna at each station
  • Experiment manual