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System is to utilize FDM of FSK digital signals to transmit and receive signals from various nodes (100 nodes). 5 km of fiber optic cable to be used and at each node, there is to be a transmitter/receiver pair. Transmitter should use LED with peak emission in the range of 800 to 950 nm while the output power of the transmitter should be in range of 5 to 10 mW. Carrier frequencies are 100 Khz to 900 Khz with 8 Khz spacing. Band limited at each node to achieve -40 dB of attenuation. When Master transmitter is ON, node transmitters should be off, wwhile aslo, when the Master Transmitter is turned off, node transmitters should be set to TRANSMIT and send their information back to Master Receiver.
That is the system specs. Any ideas for designing such a system, such as components, would be appreciated. Thanks.
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