United Electrotechnologies

• The trainer facilitates the user with both ADC and DAC conversions on the same card. The digital signal from ADC is obtained by varying the potentiometer which in turn varies the analog voltage and corresponding digital value can be viewed on the LCD provided on the SPARTAN3 board. Similarly, the digital signal to the DAC is provided by the switches on the SPARTAN3 board and corresponding analog voltage can be obtained by measuring the value of voltage at TP1.

Technical Specifications

• Onboard Input Sinusoidal Signal: 2khz (on board generation)


• Onboard Sampling Freq. : 2Khz,, 4Khz,, 8Khz,, 16Khz,, 32Khz,, Cut-off Freq.: 3.4 kHz,,


• Sampling Outputs: Sampling Amplifier & Sample Hold Amplifier


• Reconstruction: 2 nd Order 4 th Order & 6 th Order Butterworth low pass filters


• Variable duty cycle: 10% to 90%

• DCLT 005 Transmitter Coder/Modulator.


• DCLT 006 Receiver Decoder/Demodulator


• Digital Data: NRZ-L format


• Channel Coding/Decoding


• Carrier Signals: 1 MHz,, 0.5MHz,,0.5 MHz (180°out of phase)


• Amplitude: 5V peak to peak


• Reference Clock Frequency: 125 KHz,, Amplitude 5 volts


• Digital Data: 1 0 0 0 1 0 0 1 1 0 1 0 1 1 1(NRZ-L format)


• Data Conversions: Bipolar to Unipolar and Vice versa


• Data Coding/Decoding techniques: NRZ-L to NRZ-M,, NRZ-S,, NRZ-S,,URZ,, Bio-L,, Bio-M,, Bio-S,, RZ-AMI,, DPSK and vice versa


• Carrier Modulation/Demodulation Techniques using ASK,, FSK,, PSK


• Onboard Carrier Generation using PLL Techniques


• Bipolar to Unipolar conversions and vice versa


• Relevant test points for observation and sockets for connections

As the modern industrial distributed systems demand integrated control units with the faster evolution of sensor technologies, networking protocols between those integrated units have become extremely important. UE- Controller Area Network System is an entirely sophisticated Industrial Communication Bus System built around the Intel 8-bit 8051 and Philips 16-bit XA-C3 IC belonging to the famous MCS-51 series of Microcontroller. The systems are user friendly and very flexible. The Integrated development Environment or assembler and the down loader provided with the system make it possible for the user to use the kit in training, application and development. Onboard full duplex serial interfaces (RS232C), 4-Line LCD (With a total of 20*4= 80 Character capacity), 8K NVRAM, BUS extensions and Add on cards provided with 48 DIO lines, 4 channel multiplexed 12-bit resolution ADC, DAC and CAN communication module, makes it a dynamic system for any application development

Communication systems have very much evolved to become an integral part of life. Equipments like Mobile phones and systems like GPS are no more considered luxuries but have become basic necessities. Thanks for the data communication systems, that have shrunk the earth, thereby providing access to anyone & anything to any corner of the world.
Having such a situation, wherein the presence of the data communication systems is very much felt in every aspect of life, there arises a strong need for the upcoming engineers to excel in the basics & concepts of data communication.
To address the need of the time, here is United Electrotechnologies, with all its expertise & enormous exposure of the real world of technology and in an effort of sharing its experience with the young engineers presents, the Data Communication Trainer (DCT) system. The DCT system excels in its simple, user-friendly & self-explanative way of teaching the basic concepts in a practical way.

• Modulations & Demodulations: Linear & Adaptive (CVSD)


• On board Input signal (Sinusoidal): 1khz, 2khz & non-sinusoidal (Variable Amplitude)


• On board Sampling Frequencies: 8khz, 16khz, 32khz, 64khz (Switchable)


• Onboard Compressor & Expander


• Voice interface to study the performance of Linear & Adaptive modulation/demodulation


• Inbuilt channel simulator to induce noise, attenuation and bandwidth


• Relevant test points for observation and sockets for connections

This interface simulates the control and operation of an elevator. Four floors are assumed and for each floor a key and corresponding LED indicator are provided to serve as request buttons and request status indicators.
The elevator itself is represented by a column of ten LEDs. The motion of the elevator can be simulated by turning on successive LEDs, one at a time. The delay between turning off one LED and turning on next LED can simulate the "speed" of the elevator. User can read the request status information through one port reset indicators through a second port and control the elevator (LED column) through a third port.

Design and development of Communication Systems has experienced a major trend in recent years. With the adaptation of Internet, various communication devices are used in various parts of the network starting from network enabled PDAs, Pagers and central office switches etc. Most of the networking devices have a robust communication software functionality, which is used to communicate with other devices, as well as with a controlling entity.

Technical Specifications

• Analog signals: 250 Hz; 500 Hz;1 KHz sinusoidal signals


• All amplitude variable from 0 to 5V >


• Digital signals: 64 KHz, 32 KHz, 16 KHz & 8 KHz signals


• DC: Adjustable over 0 to 5 Volts


• Simplex Fiber Optic cable


• Attenuation at 660 nm: Typically 0.3 dB per meter


• Transmitter: Fiber optic LED


• Wavelength: 660 nm


• Optical power: 30 to 40 microwatts at lf=10ma


• Receiver: FO- Phototransistor

Technical Specifications

U50K / U 200k BASE SYSTEM
Different Technology Support ALTERA / XILINX / etc

XILINX (SPARTAN - II / SPARTAN - III )

ALTERA (ACEX1K Device 50K gate density)

The Spartan-3 Development Board provides the user with a complete development environment based on the XC3S1500 FPGA from Xilinx. The highly integrated evaluation board includes a 4x24 LCD Display, 16bit ADC, 14bit DAC, 32Mb Flash, 128Mb SDRAM,
RS232, LVDS, PS2, LEDs, Push Buttons, PLL Programmable Clock Generator, Graphical LCD I/F, Audio CODEC, 10/100
Ethernet MAC, 10/100 Ethernet Phy, Agilent Logic Analyzer I/F, CAN 2.0B Phy interface at a low cost.

Technical Specifications

FPGA adapter. (XILINX - XC2S30TQ144.)

Two 7- Segment LED Display.

An 8-Pin Dip Switch,, Manual Reset Switch.

On Board Oscillator & Push button.

Download Cable for FPGA Programmability.

Prototyping Area for versatile usage with five I/Os.

Bundled IP Cores with several experiments

Reusable macros for fast dubbing

Power Supply

The UE- Advanced Microcontroller Laboratory System (AMC), is built around the Intel MCS51 belonging to the famous MCS-51 series of Microcontroller.
The systems are user friendly and very flexible. The assembler and the downloader provided with the system makes it possible for the user to use these systems in training, application and development. Onboard full duplex serial interface (with RS232C and RS485 converters), 4-Line LCD (With a total of 20*4= 80 Character capacity), 8K NVRAM (as User Program Memory), BUS extensions and Add on cards provided with 48 DIO lines, 8 channel multiplexed 12-bit resolution ADC, DAC and Communication module, makes it a dynamic system for any application development..

Technical Specifications

• DCLT 003 PCM Transmitter


• DCLT 004 PCM Receiver


• Input Channels: 2 DC inputs (0-5V),, 2 sinusoidal inputs (500Hz,, 1Khz)


• Frame Synchronization Detector: Pseudo Random Sequence Generator


• Serial Data rate: Fast Mode (240 bits/sec),, Slow Mode (1 sample per 11 secs)


• ADC: 8 bit


• Error Control Code Facility: Even,, Odd,, Hamming,, None


• Serial Data Patterns: 14-bit Pseudo Random Sequence,, 14 bits of data from two channels

Observation of digital data through LEDs

• Induction of errors into the data stream


• Detection,, location and correction of errors through Hamming


• Relevant test points for observation and sockets for connections

This interface consists of a stepper motor ( +12V/ +5V DC,,3 Kg. Cm torque), Power Supply and required driver circuitry along with the necessary software to control the operation of the stepper motor. This interface permits ON/OFF control of the individual coils of the stepper motor at varying speeds in either direction.

This interface simulates the control and operation of the Traffic light. A circle connecting to four roads in the direction of North, South, East, West is assumed. Each direction road has 3 led (RED -“STOP”, ORANGE -“READY”, GREEN- “GO”) to indicate the signal. The delay between turning off one Led and turning on the next Led is programmed in software The interface allows the user to write software for simulating the operation of a simple traffic light controller.

The pulse width modulation technique is used to vary the speed of the DC motor. The frequency of the pulses is 120Hz. Keeping the frequency constant, the width of the pulses is used to change the speed.
When the pulse width is minimum, the speed is minimum and when the width is maximum, the speed is maximum.
The ramp and pedestal technique is used to change the pulse width and thereby the speed. Rectifier and Regulator, Ramp generator, Digital to Analog Converter (DAC), Motor drive section, Timing and reference voltage generator, Feedback section

The world today has become unimaginable with out Internet or Mobile Phones or any sort of communication systems. Thanks to the Networking & Data Communication Systems that have paved their ways to embark their vital existence in almost every aspect of life The scenario, expressing its inevitability towards the gigantic existence of the Network Systems, generates a need for the present generation to know, study & understand the principles of data communication & Networking United Electrotechnologies, with its enormous exposure to the real world of technology, in an effort to share its expertise with the upcoming engineers, presents Local Area Network Laboratory (LAN). The Local Area Network Laboratory promises to impart basic concepts of networking, in a very simple, self-explanative & Practical way.