28554A Advance Fiber Optic Communication demonstrates Full Duplex method of transmitting information from one place to another by sending pulses of light through an Optical fiber. The light forms electromagnetic wave that is modulated to carry information. 28554A is an Advanced Fiber Optic designed to learn the communication techniques in Fiber Optics. The 28554A demonstrates properties of Fiber Optics Transmitter & Receiver, characteristics of Fiber Optics Cable, different types of Modulation / Demodulation techniques and PC to PC communication via fiber link using USB interface. It can also be used to demonstrate various Digital Communication Techniques via Fiber Optic link using Tesca Digital Communication. Study of Eye pattern and experiment of BER measurement can be perform in conjuction with addon module.

Features

1. Full Duplex Analog & Digital Trans-receiver
2. Single module covering large number of experiments including experiments with Optical Power Meter
3. 660 nm & 950 nm Fiber Optic LED channel with Transmitter & Receiver
4. LASER Source (optional) in lieu of LED Source
5. AM-FM-PWM modulation / demodulation
6. PC-PC comm. with USB ports & software
7. On board Function Generator
8. Crystal controlled Clock
9. Functional blocks indicated on-board
10. Input-output & test points provided
11. On board voice link
12. Built in DC Power Supply
13. Numerical Aperture measurement jig and mandrel for bending loss measurement
14. Data Generator with selectable clock (64/ 128/ 256 KHz)
15. Noise Generator with variable gain
16. Eye pattern observation and Bit Error Rate measurement
17. Four digits Bit Error Counter
18. Switched faults on Transmitter & Receiver

Object

1. Setting up Fiber Optic Analog & Digital link
2. V-I characteristics of LED ( E - O converter)
3. Characteristics of Photo Detector
4. AM system using Analog & Digital input signals
5. Frequency Modulation system and Pulse Width Modulation system
6. Study of Propagation Loss, Bending Loss & measurement of Numerical Aperture
7. Characteristics of Fiber Optic communication link
8. Setting of Fiber Optic voice link using Amplitude, Frequency & PWM Modulation
9. Study of Switched Faults in AM, FM & PWM system
10. Full Duplex Computer Communication using RS232 ports and software

Technical Specifications

• Transmitter : 2 nos.,Fiber Optic LED having peak wavelength of emission 660 nm & 950 nm (Optional LASER source)
• Receiver : 2 nos., Fiber Optic Photodetector
• Modulation Techniques : AM, FM, PWM.
• Drivers : 1 no. with Analog & Digital modes
• AC Amplifier : 2 nos.
• Clock : Crystal controlled Clock 4.096 MHz
• PLL detector : 1 no.
• Comparator : 2 nos.
• Filters : 2 nos. 4th order Butterworth, 3.4 KHz cut-off frequency
•  Analog Band Width : 350 KHz
• Digital Band Width : 2.5 MHz
• Function Generator : 1 KHz Sine wave (Amplitude adjustable) 1 KHz Square wave (TTL)
• Voice Link : Fiber Optic voice link using microphone & speaker (built in)
• PC-PC Communication : USB
• Baud Rate : 19200
• Switched Faults : 4 in Transmitter & 4 in Receiver
• Fiber Optic Cable : Connector type standard SMA
• Cable Type : Step indexed multimode PMMA plastic
• Core Refractive Index : 1.492
• Clad Refractive Index : 1.406'
• Numerical Aperture : Better than 0.5
• Acceptance Angle : Better than 60 deg.
• Fiber Diameter : 1000 microns
• Outer Diameter : 2.2 mm
• Fiber Length : 0.5m & 1m
• Test Points : 50 nos.
• Inter connections : 2 mm sockets
• Dimensions (mm) : W 326 D 252 H 52
• Weight : 2.4 Kg approximately
• Power Supply : 110 -220 V, ± 10%, 50 / 60 Hz
• Power Consumption : 4.5 VA approximately
• Operating Condition : 0-40oC, 80% RH
• Package contains : Numerical Aperture measurement jig, Mandrel, Fiber Cables, Microphone, Headphone, Set of Patch Cords, PC-PC communication Software, Eye pattern and BER measurement                                       module, Power Supply & USB to serial converter (2nos).
• Optional : Optical Power Meter, 5 meter fiber cable, 10 meter fiber cable, LASER Source.