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# Optical Fibre Communication - Lab Report Example

Summary
This laboratory report "Optical Fibre Communication" seeks to find out and explain the nature of the waveforms when input frequencies of the oscilloscope are either increased or reduced while keeping the power supply at a constant voltage level of 5 volts. …

## Extract of sample "Optical Fibre Communication"

Download file to see previous pages There are many laboratory experiments that employ the use of the oscilloscope and the function generators to understand their general functionality. Oscilloscopes are signal analyzers that show images of the person carrying out the experiment of signals commonly in the form of voltage against time. Users use the pictures retrieved from the oscilloscope to understand the frequency of the graph, the amplitude of the graph and the general shape of the graph that will vary depending on what the experiment intends to find out.
Function generators, on the other hand, are sources of signals whose voltage is set by the person carrying out the research. It runs for a predefined period. The resultant signals are in the form of rectangular waves or sine waves and are used to control other equipment like a clock to work as a timing signal or used to send a radioactive signal back and forth.
Function generators have characteristic features whether analog or digital the digital type that includes: Selecting the type of the waveform. They are commonly the sine, square and triangular waves. A means to choose the waveform frequency. Standard rates range between 0.01Hz to 100MHz. The way to choose the amplitude for the waveform chosen. A minimum of two outputs. The primary output is where the user is doing the experiment finds the waveform they want. The second output, being used in this research is the Aux (TTL) which produces a square wave that has a standard of 0 up to 5 voltage signal levels. It is what we are employing to synchronize the oscilloscope to the variable primary output signal.
This experiment also involved the use of the transmitter. SFH750V transmitter emits 650 nm with the capability of outputting 20 UV of light. The device has a spectral width of 35 nm and requires a current, depending on the required intensity, of 10 to 45 mA. The transmitter is a four-pin device (only two of which are active) and comprises an LED, glass-bead focusing and a threaded chamber into which an optical fiber is inserted. ...Download file to see next pagesRead More
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