B As An Engineer You Are Required To Modify A Radio System That Is Currently Used In Melaka Convention Center Mcc I 1 (91.63 KiB) Viewed 38 times
(b) As an engineer, you are required to modify a radio system that is currently used in Melaka Convention Center (MCC) in preparation for the upcoming IEJET conference to be held at MCC. In order to meet the maximum load capacity of the MCC, it is necessary to re-design the radio system to ensure that the signal power be increased 1,000,000 times from the received signal at the antenna. The director of the MCC had previously informed that the current system receives the broadcasted signal from a temporary radio station via a radio receiver with a noise figure (NF) of 8.5 dB with a net gain ratio (Ap) of 32dB. Before being connected to an amplifier - 10- SULIT
SULIT (BEKC 2453) and a speaker, the signal is passed through a filter with a noise figure (NF) of 5.5 dB with a net gain ratio (Ap) of 1550 to achieve a better quality signal. Given that the amplifier has a maximum adjustable gain ratio of 10 dB and 3.5 dB NF, calculate the current system's overall noise figure and re-design the system to meet the requirement of 1,000,000 times the power strength from the received signal at the antenna by suggesting a suitable NF at the amplifier in dB. (15 marks) [25 marks]
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