Find the bandwidth from the graph please. This graph is obtained when a receiver

Question

Find the bandwidth from the graph please. This graph is obtained when a receiver and transmitter are connected to the CRO and power source at different frequencies. Explain also what it means.

Font Paragraph Styles Graph of Frequency Response dB 45 40 35 30 25 20 15 10 2000 4000 6000 8000 10000 12000 Figure 1.2: The graph above shows the Frequency response when the transmitter and the receiver is connected to the CRO while altering the frequency from 10Hz to 100Hz on a frequency multiplication of X100. Australia)

Explanation / Answer

I think your graph contains some error or incomplete because for calcualting band width of any frequency response graph and not only for this , it should be consider where the gain falls from maximum to 3dB and then draw the line(typicall parallel to x-axis) from the point 3dB which intersects the graph. the frequency corresponds to the the line drawn from the 3dB line which cuts the curve first is lower cut frequency and the second intersection is the upper cut frequency. the difference between those two is the band width of the response curve.

usually band width is the frequency range over which gain is constant and could be made noice less signal , and also band width is directly proportional to the amount of data carried by the signal.

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