Flite KL-900D Fibre-Optics Transmission Training System

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	KL-900D Fibre Optic Training System

In 1870, before the sceptical British Royal Society, Irish researcher John Tyndall successfully demonstrated how light could be guided in a stream of falling water. It was the first recorded observation of light being guided by "total internal reflection", and it still is a visually fascinating experiment today. The evolution of Fiber Optics from the 19th century to the present is a fascinating story of scientific development and perseverance. The KL900D is for those who want to learn about optical fibre, and its revolutionary usage of enabling high bandwidth in narrow plastic fibres that would have previously used 1000s of bulky and expensive copper cables.

Fiber optic communication is one of the most popular technologies in the modern days due to its high transfer capacity and quality, as well as speed and security. KL-900D uses fiber optic as a trans-mission media for the whole experiment. With four different data transmission ways (self module transmission, module-to-module transmission, PC-to-module transmission, and module-to-PC transmissions) and various different modulation/demodulation methods (CVSD, FSK, etc) introduced in the training system, users can obtain a very clear view of how fiber-optic transmission works.

The system has 15 experiments, listed below, from simple optical characteristic experiments to sophisticated optical fibre digital data transmission using ASK  (Amplitude Shift modulation & demodulation Keying).

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SPECIFICATIONS

Power：AC-DC Adapter

• AC Input   ：100~240V
• DC Output：15V，500mA

Microphone circuit：

1. Frequency range：20Hz~12KHz
2. With 20 times amplification circuit

Pushbutton switch：

1. Normally open type
2. With LED indication

Transmitter：

1. Optical fiber light：red wavelength 660nm LED
2. Max. drive current：50mA
3. Effective coupling micro-lens spotlight
4. Emitter follower transmission

Function generator：

1. With analogy sine wave, output amplitude adjustable
2. With digital square wave, CMOS level output
3. Frequency range：6Hz~2KHz

Receiver：

1. Optical receive diode：
   - lpeak：950nm
   - Connectable 100mm Core plastic optical fiber
   - Effective coupling micro-lens spotlight
   - Max. consumption power：100mW
   
2. With amplify, gain, restoring circuit

Output speaker：8Ω，1/4W

Data transmission：

1. Chip set：AVR8515，8bits，8MHz Crystal
2. LCD：back light 20×2 letter chip
3. Keyboard：4×4 16Key
4. Letter mode：single letter or string of letter available
5. Send mode：OFF, Transceiver, PC->Module, Module->PC
6. With Reset function
7. Communication interface：RS-232C，9600 Baud
8. Software environment：Windows base

List of Experiments：

1. Optical characteristic experiment
2. Optical application experiment
3. Light source experiment
4. Optical fiber light detector experiment
5. Light source set up experiment
6. Optical fiber receiver experiment
7. Optical fiber network and expanded experiment
8. Optical fiber linking and coupling experiment
9. Optical fiber digital data transmission
   – self-transmission experiment
10. Optical fiber digital data transmission
    – both sides transmission experiment
11. Optical fiber digital data transmission
    – computer à module experiment
12. Optical fiber digital data transmission
    – module à computer experiment
13. Optical fiber digital data transmission
    – CVSD modulation & demodulation experiment (option)
14. Optical fiber digital data transmission
    – PSK/QPSK modulation & demodulation experiment (option)
15. Optical fiber digital data transmission
    – ASK amplitude shift modulation & demodulation experiment (option)

Experiment modules：

1. 2mm plugs and sockets used throughout, connected by 2mm test leads.
2. Circuits symbols, blocks and components printed on the surface of PCB, back assemble components.
3. Modules secured in plastic housings, the dimension：255×165×30mm±10%。
4. With storage cabinet for all modules to be easy storage.
5. Completed experiment manual
6. Modules circuit use short bar to reduce error.

Accessories：

1. 2mm-2mm connect lead 1 set
2. Optical fiber cable 1 set
3. Experiment manual
4. 9P-9P Cable
5. Transceiver Software Disk
6. AC-DC Adapter power module
7. Connect plug
8. Headphone and microphone

Option modules：

1. KL-92001 Power supply and function generator
2. KL-94004 CVSD modulation & demodulation
3. KL-94005 ASK amplitude shift modulation & demodulation
4. KL-94006 PSK/QPSK modulation
5. KL-94007 PSK/QPSK demodulation