The word digital in fiber optic means, much the same as it does in electronics. Digital gates, circuits or systems are those, in which there are two defined states. A LOW or a digital ZERO and a HIGH or a digital ONE. In all digital systems, LOW or HIGH, low does not necessarily means a ZERO voltage or ZERO optical signal. A digital ZERO means, a LOWER state than the digital ONE state.
Digital Transmitter in this trainer consists of the following circuits. Using them the student studies different types of different transmitting circuits.
I. Single switching circuit,
II. Push-Pull driving circuit,
III. Ten-megabit push-pull drive circuit.
Transmission is done through 1000mm multi-mode plastic fiber cable. The digital receiver consists of (a) CMOS receiver, (b) discrete bi-polar transistor.
This unit is assembled in an ergonomically designed cabinet, with necessary power supplies and associated emitters, detectors, multi mode transmission cables. You need optional signal sources, Oscilloscope, a high impedance mulitmeter as additional equipment to successfully conducting the above objectives.
Specification:
Types of Transmitters:-
Infra Red : Fiber optic Infra Red 820 nm peak wavelength housed in
FC adapter.
Visible RED : Fiber optic Red 635 nm peak wavelength housed in
FC adapter.
Types of Receivers:-
Photodiode : Peak sensitivity 880nm
Phototransistor : Peak sensitivity 850nm
Connection : Plastic fiber optic package, suitable for PMMA cable,
housed in FC Adapter
Fiber connector : Industry standard FC – FC connector
Fiber optics cable type : Plastic optical cable, step index, multimode.
Core refractive index : 1.492
Clad refractive index : 1.406
Acceptance angle : Within 60 degrees
Core diameter : 1000mm
Fiber diameter : 2.2mm
Fiber length supplied : 1 meter and 3 meter
Power supply : 5V and 12 V
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