Telecommunications Range Brochure
Contents
1. Radiation resistance Drive point impedance and ground resistance Physical and electrical length Directional antennas and radiation patterns Parasitic arrays amp antenna gain Antenna with folded elements Slot radiators 3 dimensional polar diagrams Loop antenna TLD511 Tansmisson Lne Demonstrator Features Large bright LED display Built in step function process Variable simulated line length Manual hold facility Comprehensive manual Variable Phase Generator VPG608 Recommended ee Frequency range QO Hz to 1 kHz Phase shift from 180 to 180 Outputs variable up to 10 V pk pk 1x01 and x OO Square amp triangular auxiliary Attenuation of x outputs VCF and SYNC facility Features Fully operational antennas Displays of antenna characteristics Convenient size for classroom Versatile and easy to assemble Complex concepts made easy Reconciles theory and practice Telecommunications 35 AM2961 FM2962 Radio Systems Trainer Features AM2961 Covers the principles of AM radio signal generation and reception Single and Double sideband with suppressed carrier Receiver operating at 500 1600 kHz MW amp 3 4 MHz SW One fixed generator frequency in each band Switched faults on both boards Features FM2962 Covers the principles of FM radio signal generation and reception Stereo transmission and recepti2. Feedback Espial courseware which offers on screen instruction and embedded real time virtual instrumentation Both these teaching philosophies are valid ways of demonstrating technical characteristics but the underlying principle that both share is giving the student the opportunity to work with real hardware and avoid simulation Features Ideally suited for University and Technical College courses Covers analogue and digital telecommunications All products provided with in depth teaching manuals or software Compact bench top systems Teaching material relevant to industrial practice Integrated instructions and Instrumentation Espial Software is Feedbacks continuously evolving software package The basic and most important philosophy of Espial is its interactivity with teaching hardware Espial can be applied to products within our complete range of teaching products and is used extensively within the Telecommunications range Further in depth information always available Espial is written in such a way that its appearance and the instrumentation made available depends on the practical being executed So if the practical requires the display of a constellation or a phase meter as in CAM experiments one is made available whereas at lower levels of study it would not be provided The within the un earning material is provided the software and this includes derlying theory which is
3. Phase Shift Keying PSK gt Multi state Phase Shift Keying Quadrature Amplitude Modulation QAM Uncoded binary data formats Bi phase data format Alternate mark inversion Telecommunications 37 56 200 Microwave Trainer Features 56 200 Stand alone low cost system No ancillary equipment required Simple robust stands for antennas Modulated 10 425 GHz solid state DRO source Components identified With inscribed reference number Features 56 901 Impedance dispersion and loss calculations Optimisation including eight optimisers Yield analysis Smith chart Planar lines analysis and synthesis Integrates measured data with simulations MIDE linear frequency domain circuit simulator 56 200 Microwave Trainer Microwave Trainer 56 200 This instrument allows the user to investigate the principles of microwave transmission systems such as those used in radar and communications It uses standard type WGI6 WR90 wave guide components fo ilustrate the essential elements It is completely self contained and allows students to carry out realistic practical work The equioment has a modulated dielectric resonance oscilator DRO X band source a selection of waveguide components a console containing a power supply a demodulation circuit and a meter that monitors the detector output aublEct Areas 56 200 ntroduction to microwave waveguide be
4. written Espial software can be installed either in a stand alone configuration or networked and central y served ESPIAL Software The interactivity of Espial means that it provides real time PC based instrumentation and in the case of Telecommunications this includes Dual channel Oscilloscope Spectrum Analyzer e Voltmeter Frequency Counter in such a way that it does not use mathematics at too high a level An important part of the teaching programme is to highlight the learning objectives of the various experiments and convey the background involved to the student This information is also included in the software Consequently the student is suitably prepared to start the practical work using the hardware 33 Phasor and Constellation Displays Bit Error Rate BER Meter Antenna Polar Diagram Plotter Telecommunications 57 200 Antennalab Features Feedback Espial teaching software Unique integration of hardware and software Models and tests real antennas Hardware modeling between 1200 MHz and 1800 MHz PC based measurement and results Rapid graphic display of antenna characteristics Bench top operation Low safe power output USB interface Se I Le js E 1 v The AntennaLab is a unique system designed to be used in two distinct ways for teaching and demonstrating common antenna configurations at all l
5. ECURIT Network amp Data Security Training Systems innovative design allows real life training The Benchmark i SECURIT is a complete system with two interconnected real life networks the Trusted Network and the Black Network These networks are isolated from the real world ie any corporate or campus LAN and the Internet The i SECURIT Central Control Unit CCU runs the network services adminis tration and control methods The Black Network users attempt to compromise the services by different attacks such as Intrusions Password Cracking and Denial of Service The trusted network users simultaneously work on and are trained to deploy itable counter measures to keep sui network services running properly You can connect up to 15 PCs with one slot reserved for the network administrator and can start working with as little as two to three PCs Telecommunications 46 Traffic Alteration Active Attack DECRYPTION ALGORITHM RECEIVER DECRYPTION S Networking basics Ethics and Legality KEY ubject Areas Network Security Fundamentals an Introduction Network System threats Denial of Service DoS Distributed Denial of Service DDoS Sniffing Packet Mail sniffing Spoofing IP MAC Web Vulnerabilitie an Web based password capturing Honeypots Malware Trojans amp Backdoors gt Virus amp AV methods Network
6. Identification Enumeration OS detection Cryptography Symmetric encryption scheme Stream Cipher RC4 Symmetric encryption scheme Block Cipher S DES 3 DES Asymmetric encryption scheme Block Cipher RSA Hashing scheme MDS5 Block Cipher modes ECB CBC CFB OFB Web services using crypto techniques PK Authentication schemes Steganography ire NetSys T Network Systems Lab Traditionally teaching in computer networks or LAN WAN subject is oriented towards signal transmission methods or network architecture and protocols study in both Electronics amp Communication and Computer science engineering streams The Benchmark NetSys T Network Systems lab helps to realise end to end network service in a lab environment diffusing boundaries between voice and data wired and wireless LAN and WAN etc Network architecture and protocol studies focus on switching techniques queuing models and computer networks Between two end PCs in a WAN or between a user and a server on the internet there lies a vast array of equipment such as switches routers firewalls amp IDSs These all use various technologies such as Ethernet WLAN EI TI DSL SDH FDDI AIM and ensure the required data is exchanged seamlessly S VLAN realization using Layer 3 L3 and L2 switches and demonstration of inter VLAN Radio survey o WLAN realization and throughput ubject Areas Shared an
7. Ring Star Data Link Layers Stop and Wait Sliding Window Go Back N and Sliding Window Selective Repeat User configurable data rates 8 16 32 64 128 256 512 Kbps 1Mbps User configurable delays between nodes emulates the propagation delay in real networks Generation of bit errors and fram rrors between nodes up to 10 6 Variable network size up to six nodes with each NEU Emulation of two nodes by each PC Halves the number of PCs required Allows experimentation using the software provided source code included for better understanding Allows programming all experiments from scratch using the library for more in depth exposure Menu driven user interface to experiments Comprehensive manual for both lab instruction amp self study 45 LAN T SYSTEM Local Area Network Trainer Telecommunications I SECURIT SYSTEM Network Data System TRANSMITTER Features Single Trainer solution for practicing several different Network Security amp Cryptography topics Comprehensive set of exercises for different security threats and attacks Central Control Unit CCU to control and emulate real life network under study Variable network size up to 7 nodes in each network Trusted and Black can be controlled Traffic Monitoring Passive attack Possible Threat Environment ENCRYPTION ALGORITHM COMPROMISED CHANNEL ENCRYPTION KEY i S
8. Telecommunications Telecommunications Telecommunications Workstation Antenna Lab Transmission Lines Microwave Prinicples Microstrip Technology Fibre Optics Wireless Communications LAN Trainer Network amp Data Security AM amp FM Radio Espial Courseware Telecommunications is one of the world s fastest growing industries and world wide personal communication of voice picture and data is now commonplace The Feedback range of Telecommunications training equipment has been designed to provide a modern efficient approach to training the engineers and technicians working in this field Feedbacks philosophy is to equip students with the fundamental ideas and principles that underpin modern telecommunications practice by using versatile trainers that quickly and clearly demonstrate the required characteristics Paramount to all Feedback equipment is the principle that students of engineering and technology should work with hardware and be allowed to take a hands on approach All of Feedback s teaching hardware is supported by extensive teaching and theoretical courseware This can either be in the form of paper manuals or software 391 Within the Telecommunications range Feedback offers hardware that can be used in conjunction with conventional test and measurement equipment using paper manuals Alternatively laboratory work can be carried out using equipment connected to a PC enabling it to take advantage of
9. an be easily adjusted by the operator The line is completely symmetrical so that either end may be regarded as an input or an output The unit features large bright LEDs a built in step function generator and is supplied with a manual ee Areas Propagation of a wave front Propagation of a sinewave Effect of wavelength Attenuation and dispersion Terminations Reflection standing waves and characteristic impedance Partial reflection standing waves and superposition of incident and reflected waves Resonance and the effect of attenuation ltol Lines with dissimilar lossless terminations impedance transformations Resonance and capacitive detuning Reactive line impedance either side of resonance ASD512 Antenna System Demonstrator ASD512 Antenna Demonstrator This is a fully operational antenna system that has been designed to provide an ideal classroom demonstrator The system uses a kit of parts to allow many types of antenna to be constructed making the system versatile as a demonstrator of both antenna principles and practice Two hand held detectors are provided that show relative magnitudes of voltage and current fields around the antenna and the field strength of the antenna The system works at a frequency of 1672 MHz giving a half wave element of approximately 90 cm Subject Areas Basic theory of radiation Radiating and non radiating systems Feeders
10. as Features Multimode plastic amp glass fibre OFT Optical Fibre and Digital characteristics Communications Trainer Measurement of numerical aperture demonstrates integrated attenuation amp bending losses EMI voice data communication link and pulse broadening effect TDM ond digital communication Attenuation amp bending loss principles Clad mode stripping study Demonstration amp Measurement Laser diode module Individual LED LASER PD and P amp V I characteristics APD Modules for device Line of sight link 650 nm characteristics study The Avalanche photodiode module characteristics modules cover Zero bias reverse bias leakag forward reverse amp zero bias characteristics multiplying effect of APD leakage characteristics LED module Specially designed component PIN photodiode module insertion PCBs for link construction Optical Time Domain Reflectometry for repeated use by students OTDR Light Source with variable Digital communication concepts optical power output Study of 64 Kbps transmission concepts continuous wave external Time division multiplexing modulation internal word Marker in TDM and false marker and PRBS generation generation Power Meter calibrated at 650 Manchester coding 850 and 1300 amp 1550 nm PCM voice coding Optional Connectorisation and Fibre optic link design and analysis Splicing Kits provide students analog and digital FO di
11. d switched band width utilisation in LANs using Hub and switches LAN realization using Layer 2 L2 switches and demonstrate key aspects of Ethernet protocol routing Demonstration and performance routing protocols RIP OSPF etwork access control in a LAN WAN network using L3 switch amp router measurement o etwork securi and intrusion d ty realization using firewall etection systems IDS measurement 47 Network Systems Lab Telecommunications
12. entation Nyquist and Bode diagrams can be easily shown 53 220 Tuned Circuit and Filters Workboard With these circuits students can examine the principles of passive filters RCC and L C tuned circuits Q loading low pass crystal filters active filters tuned amplifiers and automatic gain control AGC 53 230 Modulation and Coding Workboard Is a fully featured complete laboratory course covering the principles of operation and the practical implementation of modern modulation systems required for both analogue and digital communication systems 53 004 Telecoms Workstation subject Areas 53 210 Voltage Current input and Controlled gain amplifier Oscillation criteria Wien bridge oscillator Tuned amplifier C amp Crystal oscillator Oscillator stability amp buffering M ltivibrator Tuned power amplifiers subject Areas 53 220 Crystal filters Tuned amp coupled tuned circuits Ceramic bandpass amp LC high pass filters Audio opamp amp IC low pass fiters Butterworth Chebyshev amp High order filters subject Areas 53 230 Signals in the time and frequency domains Sampling and Time Division Multiplexing TDM Amplitude Modulation AM amp AM with Suppressed Carrier SSB generation with an IO modulator Amplitude Shift Keying ASK Frequency Modulation FM amp FM with an IO modulator Frequency Shift Keying FSK Phase Modulation PM
13. evels of study and as a design tool by those engaged in research and development The equipment comprises two towers one being a low power transmitter controlled by a frequency synthesizer The second contains a frequency synthesiser controlled receiver The antenna to be investigated is mounted on top of the transmitter tower The transmitter tower can be rotated through 360 degrees and displays the following characteristics Signal level Frequency response Polar diagrams Return loss plots E amp H planes in three dimensions Bandwidth Telecommunications 34 5 AEn Es i Te ET E E 2n ubject Areas The Dipole in free spac Effects of the surroundings Dual sources Gain directivity and aperture Ground reflections The monopole Phased monopoles Resonanc impedance and standing waves Return loss and VSWR measurements Parasitic elements Multi element parasitic arrays Stacked and bayed arrays The log periodic antenna The horn antenna The dish antenna TLDSI1 Transmission Line Demonstrator TLD511 Transmission Line Demonstrator This system demonstrates the characteristics of transmission lines in a graphic manner The system uses a simulated line that effectively displays the high frequency characteristics of a transmission line at low frequencies so that they can be easily observed The line characteristics c
14. gital link with hands on experience in Multimode digital fibre link sensitivity connectorisation and splicing and power budget of glass fibre Bit rate measurement and study of a c coupled digital link Telecommunications 41 OFT SYSTEM Optical Fibre Trainer Features Eleven usable 64 Kbps channels OFT Optical Fibre Trainer is a powerful versatile and cost effective system teaching the principles of digital data transmission through to fibre optic The OFT Trainer facilitates demonstration training amp experimentation in basic andadvanced concepts including principles of Description Principles of fibre optic communications 850 nm and 650 nm fibre links Demonstrates established digital communication techniques such as Time Division Multiplexing Transmitter amp Receiver operation PCM voice coding at 64 Kbps Manchester Coding and Decoding for fibre optic communications basics of timing recovery Channels switchable digital baseband communications at transmitter amp receiver using advanced experimentation and time switching principles Easy interface development in fibre optic amp digital to external circuitry all required inputs communications and outputs provided and extensively documented Power available to RS 232C communications external circuitry as well module optional Subject Areas Fibre optic analogue links User definable frame marker two alternating 8 bi
15. lator Insertion loss measurement on Measurement of return loss reflection coefficient and VSWR of a filter microstrip a low pass filter and commercial matched loads Matched investigations reflection coefficient of unknown resistive load and shunt stub Properties of a power divider and rat race coupler Effective dielectric constant line loss measurement with a ring resonator d c biasing and MMIC amplifier investigations PIN diode modulator investigations Microwave radio link and antenna investigations 39 and its matching by 1 4 g transformer F MST532 1 Microstrip Trainer eatures Latest Microwave technology 2o 3 4 GHz VEO 2 to 4 GHz PIN diode modulator No ancillary test equipment required Sate low power output Components identified with inscribed reference number Supplied in protective case Telecommunications EFO SERIES Fibre Optic Trainers Features Teaches fibre optic measuring techniques Demonstrates properties of light visible and infra red Analogue and Digital data transmission Self contained training package EFO1101 Fibre Optics Trainer investigates various aspects of fibre optic technology and its use in transmitting analogue and digital data with reference to telecommunications The trainer comprises an optica ransmitter with an infra red LED a red LED and variable output control
16. n Training Platform is the actual implementation of modern digital communication systems with direct interface to MATLAB through the Hi Speed USB port of a PC Telecommunications 44 flexibility in learning complete digital communication system concepts which includes digital modulation techniques Baseband Equalization Filtering concepts and the basics of CDMA GSM etc MATLAB codes of al suggested experiment topics are available to users as reference A MATLAB interface to the Platform also allows users to try out other topics on their own Subject Areas Baseband Digital Comms Link Raised Cosine spectrum pulses Timing acquisition algorithm Matched filtering performance in noise Quadrature Modulation Schemes OPSK Phase amp frequency offset Constellation plots Carrier recovery algorithm Clock Tracking amp slip control Adaptive Equalization Techniques linear amp decision feedback equaliser MSE convergence Decision aided channel tracking GMSK modulation amp demodulation Viterbi equaliser for GSM Basics of DS CDMA amp OFDM Orthogonal amp non orthogenal spreading codes Multipath channel estimation for RAKE receiver SER performance of RAKE combiner Timing amp Frequency synchronisation Channel estimation using FFT processing amp modified LS Mean Square Error performance LAN T Local Area Network Trainer is a versatile labo
17. nch and measurement of source requency and guide wavelength Voltage Standing Wave Ratio VSWR Diode detector law Impedance and impedance matching Measurement of radiation diagram of a horn antenna Use of directional couplers in power ransmission and reflection measurement Series shunt and hybrid tee waveguide junctions Waveguide to coaxial transformers 56 901 MIDE Microwave Design Software MIDE Microwave Design Software 56 901 is a powerful engineering program for the simulation of complex linear microwave and circuits It is used to determine transmission reflections stability and gain of circuits Telecommunications 38 The MST532 1 microstrip trainer uses high precision components to allow students to investigate microstrip technology principles The Complete Microstrip System MST532 1 needs no additional test equipment as it is supplied with a digital multimeter and a dual d c power supply A user manual is supplied that gives students detailed background material theory and structured assignments whilst avoiding unnecessary mathematical analysis The precision components 18 passive and 3 active are packaged in bright nickel plated enclosures and are interconnected using industry standard SMA couplings See ordering guide or product datasheet for ordering options S ubject Areas Power source and detector action Action of a 3 port circu
18. on Extensive use of monitoring points for signal tracing Switched faults on both boards FM2962 FM Stereo Radio Systems Trainer AM Radio Systems Trainer AM2961 The AM Radio Systems Trainer comprises two open boards AM296IA AM DSB SSB generator AM296IB AM DSB SSB receiver The AM circuits operate within the AM broadcast band and the DSB SSB circuits operate within the 80 m ham band The generator output is only a few miliwatts so the range of transmission is extremely limited The receiver has an integral antenna but may also be used with the addition of an external antenna fo receive normal broadcast and amateur signals The principles and techniques of AM with ful carrier double sideband and single sideband suppressed carrier transmission and reception can be easily investigated Subject Areas AM2961 Modulation and demodulation Mixing techniques Filtering RF and audio AGC RF IF and AF amplification IC crystal and VCO oscillators Single and double sideband Telecommunications 36 FM Stereo Radio Systems Trainer FM2962 The FM Stereo Radio Systems Trainer comprises two open boards FM2962A stereo generator amp FIM2962B stereo receiver The FM receiver circuits operate over a range of 88 108 MHz and the generator provides a fixed output frequency of 100 MHz with a 19 kHz pilot fone The generator output is only a few miliwatts so the range of tran
19. ratory system that supplements courses on Computer Networks and LANs The Trainer exposes users to networking concepts at the physical MAC network and transport layers through a carefully designed series of experiments The experiments reinforce the theory covered in lectures while hands on programming exercises train users to fit into networking positions in industry The Trainer can also be used for project work involving many layers of the network hierarchy Wide functionality at low cost with minimal investment in a single trainer Features and 2 3 PCs users can obtain hands on experience with a wide variety of different network topologies and protocols including all the popular ones such as CSMA CD Ethernet and token passing Arcnet Token Ring The trainer consists of a Network Emulator Unit NEU with PC plug in Network Interface Units NIU and Win95 based Experiment Software The software contains a series of experiments in the form of stand alone applications C source code for the experiments and a C library to access the NIU The source code provides better understanding of the experiments while the library allows users to program new experiments modify existing experiments and try out various network layers and protocols Comprehensive set of experiments t observe and measure the behaviour of several LAN protocols MAC Layer ALOHA CSMA CSMA CD CSMA CA Token Bus Token
20. rbium Doped Fibre Amplifier EDFA is an optical amplifier that amplifies optical signals sufficiently to cover several tens of kilometers without any need for conventional repeaters Moreover as it works in the same optical domain it avoids the need for several stages of signal conversion with their associated problems Parang principles of EDFA Working of EDFA in co directional counter directional pumping Gain Power Conversion Efficiency Quantum Conversion Efficiency ASE ASE noise signal ASE beat EDFA Building Blocks Wavelength Selective couplers 980 nm 1550 nm Tap coupler for 980 nm 99 1 Optical isolators 1550 nm Optical circulators Fibre Bragg Grating FBG Optical attenuator 1550 nm Measurement of absorption coefficient Mode field dia mismatch in EDF P Curve Knee Current Spectrum Optical Spectrum Analyser OSA also required Large and small I P signal vs Gain Pump laser power vs Gain EDF length Vs Gain Pump saturation signal saturation 1550 nm 34 Mbps data rate Setting up a digital link using the OFT 43 ETS EDFA Training System Subject Areas ETS EDFA Understanding the operating principles of EDFA Understanding the EDFA Building blocks Characteristics of EDFA Characteristics study of Pump Laser 980 nm Characteristics study of Signal DFB Laser 1550 nm Factors contributing to EDFA Gain Pump La
21. s It has an optical receiver which includes a loudspeaker for analogue output high and low impedance analogue outputs variable analogue gain buzzer digital output and TTL CMOS and RS232 voltage level digital outputs Two lengths of fibre optic cable various electrical connectors and accessories complete the kit EFO1102 Fibre Optics Power Meter is an accurate versatile and low cost unit for measuring optica power levels at terminated optica cables An easy to read pointer scale gives readings in both dBm and microwatts The meter ranges between ImW O dBm down to a sensitivity of better than InW 60 dBm The meter Telecommunications 40 is calibrated at a wavelength of 820 nm and permits accurate measurements between 800 nm amp 850 nm Meter connector options include SMA amp STRATOS EFO1105 Fibre Optics Monitor is a versatile fully portable product used to design fibre optics and general optics measurement applications It uses SMA and STRATOS connections Subject Areas Shows the properties of light and infra red radiation Transmission of high quality analogue and digital data over optical fibres and free space using visible and infra red light Converting various light sources such as torch light and infra red light and to audio signals Construction of an alarm system based on the presence of a light signa Clarifying the important differences bet
22. ser power length of Erbium Doped Fibre Setting up a Fibre Optic link with EDFA Fibre ring laser SECTE IR Module OOI required Module OO includes FOSM D600 ID Driver FOTX 610 LD Modulator amp FORX 500 Optical Receiver Telecommunications WiCOMM T Digital Communications F eatures Typical implementation of modern communication systems Interface with MATLAB Gives the ability to generate required signal and pass it through the transmitter and receiver providing a real life wireless digital communication system Comprehensive manual describes wide range of experiments Loop back options at Base band and at IF q The WiCOMM T provides maximum Digital modulations are often expressed in terms of in phase and Q quadrature signals All modern digital communication systems and gadgets have three main blocks namely e Data processing block ADC and DAC conversion block e RF block All the blocks process the and O signals simultaneously leading to the use of complex algebra and analysis in their design and implementation This standardized and uniform approach in building digital communication systems or gadgets results in lower cost of development and manufacturing The focus is also turned towards adding more features and bringing in more techniques within the available RF spectrum WiCOMM T the ultimate Wireless Digital Communicatio
23. smission is extremely limited The receiver operates on an F frequency of 107 MHZ in stereo or mono mode and may also be used with an external antenna to receive normal broadcast and amateur signals Switched faults can be introduced on both generator and reciver units Fault options include Multiplex Pilot fone and Mute errors power for tuner audio and demodulator forces tuning volts fo zero and high gain AFC loops locking fo a signal URJA Areas FM2962 Familiarisation with FM multiplex stereo ransmission and reception Frequency modulation Stereo multiplex encoding pre emphasis pilot tones and sub carriers FM reception filtering limiting and AFC FM demodulation Stereo multiplex decoding de emphasis and audio amplification 53 210 Amplifiers amp Oscillators Workboard 53 230 Modulation amp Coding Workboard 53 004 Telecommunications Workstation The system comprises Amplifiers and Oscillators 53 210 Tuned Circuits and Filters 53 220 and Modulation and Coding 53 230 and PC interface Teaching content and instrumentation is provided using Espial software 53 210 Amplifiers and Oscillators Workboard This workboard allows the construction of various Amplifiers Oscillators and Signal Sources The workboard shows the principles of R C L C and crystal oscillators feedback loop gain amplitude stabilisation oscilation distortion and frequency stability Using the PC instrum
24. t markers can be set to CCITT compatible wo on board digitized voice channels one 8 bit data channel and several user expansion channels Demonstrates fully operational integrated voice data fibre optic communication link demonstrates computer Digital link Losses in optical fibre Effect of EMI interference Numerical aperture measurement communications over fibre Time Division Multiplexing of voice data amp user defined data streams Time Division Multiplexing Framing in Time Division Multiplexing Manchester Coding Decoding Modular design enables configuration with user designed modules Wide scope for experimentation through use of external circuitry interfaced to kit Ready to use kit comes complete with accessories Telecommunications timing recovery Pulse broadening Communications Voice coding A law in Fibre Optic 42 The Benchmark ETS EDFA Training System addresses the need for a training setup that shows the building blocks of a typical EDFA as well as the characteristics of such blocks All the blocks are given with proper input and output connections such that they can be configured in ditferent modes of operation such as co directional and counter directional operations This modular approach also facilitates study of individual block characteristics wherever possible The E
25. ween analogue and digital techniques Measurement of the optical absorption or reflection properties of various materials Testing analogue or digital optical receivers and transmitters OFS IV Optical Fibre System The OFS V is designed to provide comprehensive training to students and all levels of scientific and technical personnel on fibre optic devices and digital communication systems The laboratory spans fibre optics and related topics including Fibre optic device characteristics Principles of fibre optics and digital communications Fibre optic equipment Digital and analog fibre optic links The OFS IV System can be used for demonstration training and experimentation and can form the basis for student and research projects and prototypes OFS IV Optional Modules and Standalones includes the SMC Single Mode Fibre Characteristics Training System which enables comprehensive training on Single mode fibre characteristics such as Normalized Frequency V number Modes cut off wavelength Mode field diameter and Numerical aperture of a single mode fibre Modes observation in two different single mode fibres having different cut off wavelengths Precision XYZ positioner for coupling the free space 650 nm Laser light into Single mode fibre Specially designed mechanical setup for Mode Field Diameter and NA measurement OFS IV SYSTEM Optical Fibre System Subject Are
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