General description:
 

• Training board, suitably constructed, to demonstrate the properties of fiber optic transmitter and receiver, the characteristics of fiber optic cables, various modulation / demodulation techniques, and PC-to-PC communication via optical coupling and RS-232 interface. 
• Covered topics
• creation of analog and digital fiber optic link 
• width modulation, using analog and digital signals
• frequency modulation system
• pulse width modulation system
• study of fiber optic loss propagation
• study of bending losses
• measurement of numerical aperture
• E-0 (LED) converter features
• fiber optic communication link characteristics
• create fiber optic voice link, using amplitude, frequency and pulse duration modulation
• error study, in AM, FM and PWM systems
• propagation losses, using an optical power meter
• Fully two-way computer communication, using RS-232 ports and software
• eye chart observation APPARTURE OK
• binary error rate measurement ???• binary error rate measurement ???

   Specifications

• Transmitters with emission wavelength peak at 660nm and 950nm
• Two fiber optic receivers with photodetector
• Configuration techniques: AM, FM, PWM
• PLL Detector
• Two AC amplifiers
• Two comparators
• Two 4th class Butterworth Filters, with a cut-off frequency of 3.4kHz
• analog bandwidth: 350kHz
• Digital bandwidth: 2.5MHz
• Function generator: sinusoidal, configurable, (1kHz), and square (1kHz, TTL)
• Fiber optic voice link, with microphone and speaker (built-in)
• PC - PC communication, with two-channel RS-232
• Fiber optic cable: SMA connector
• Numerical opening better than 0.5
• Acceptance angle: better than 60 
• fiber diameter 1mm, outer diameter 2.2mm
• Fiber length: 0.5m and 1m
• Connections with 4mm or 2mm sockets
• At least fifty test points