Description

Features

• Simplex Analog and Digital Transreceiver
• 660 nm channel with Transmitter & Receiver
• AM-FM-PWM modulation / demodulation
• On board Function Generator
• On board Clock & Data Generator
• On board Bit Error Counter
• Crystal controlled Clock
• Functional blocks indicated on-board mimic
• Input-output & test points provided on board
• On board voice link
• Built in DC Power Supply
• Numerical Aperture measurement jig and mandrel for bending loss measurement
• Switched faults on Transmitter & Receiver

Scope of Learning

• Setting up Fiber Optic Analog & Digital Link
• AM system using Analog & Digital Input Signals
• Frequency Modulation System
• Pulse Width Modulation System
• Study of Propagation Loss in Optical Fiber
• Study of Bending Loss
• Measurement of Numerical Aperture
• Characteristics of Fiber Optic Communication Link
• Setting of Fiber Optic Voice Link using AM, FM & PWM
• Study of switched faults in AM, FM & PWM System
• Propagation loss using Optical Power Meter
• V-I Characteristics of LED ( E – O converter)
• Characteristics of Photo Detector
• Effect of EMI on Optical Communication
• Measurement of Bit Error Rate
• Study of Eye Pattern

Technical Specifications

• Transmitter : 1 no., Fiber Optic LED having peak wavelength of emission 660 nm
• Receiver : 1 no., Fiber Optic Photodetector
• Modulation Techniques : 1. AM    2. FM     3. PWM
• Drivers : 1 no. with Analog & Digital modes
• Clock : Crystal controlled Clock  4.096 MHz
• PLL Detector : 1 no.
• AC Amplifier : 1 no.
• Comparator : 1 no.
• Filters : 1 no. 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)
• Clock Generator : 64 KHz/128 KHz/256 KHz (TTL)
• Data Generator : 15 Bit
• Noise Generator : Variable level
• Bit Error Counter : 4 digits, 7 segment display
• Voice Link : F. O. voice link using microphone & speaker (built in)
• Switched Faults : 4  in Transmitter & 4  in Receiver
• Fiber Optic Cable : Connector type Standard SMA
• Cable Type : Step indexed multimode PMMA plastic cable
• 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 : 0.5 m & 1 m
• Test Points : 34 nos
• Inter connections : 2 mm sockets
• Dimensions (mm) : W 326 × D 252 × H 52
• Weight : 1 Kg  approximately
• Operating conditions : 0-40 C, 80% RH
• Power Supply : 110-220 V, ±10%,  50/60 Hz
• Power Consumption : 3 VA approximately
• Included Accessories : NA Measurement jig, Mandrel, Fiber cables, Microphone, Headphone, Set of Patch cords
• Optional Accessories : Optical Power Meter, 5 meter fiber cable, 10 meter fiber cable.