- Question 1 10 Marks Figure Qla Is A Block Diagram Of A Private Radio Receiver The Receiver Is Operating At The Freque 1 (125.01 KiB) Viewed 21 times
QUESTION 1 (10 MARKS) Figure Qla is a block diagram of a private radio receiver. The receiver is operating at the frequency of 550 kHz to receive full AM signal. The minimum and maximum bandwidths required by the system are 100 kHz and 200 kHz. If the surrounding temperature of the system is 17 °C, calculate the following: a. Noise Figure, NF for the system. (C01:P01 - 7 marks) b. Noise voltage, V, at the input if the antenna resistance is 500 12. (k=Boltzmann's constant (1.38 x 10-23 J/K)) (C01:PO1 - 3 marks) NF;=3dB L3= -10dB T S Pre selector RF amplifier Mixer IF Filter Audio Section N NF:-1dB G=20dB G2=30dB NF = 4dB T=348K 4--10dB Local oscillator Figure Qla