A commercial receiver sold for reception of television progr

A commercial receiver sold for reception of television programs from satellites has a choice of four filters (14, 20, 26, and 36 MHz wide). Compare the amount of noise in each bandwidth, assuming a low-noise amplifier with a noise temperature of 35 K and an antenna noise of 45 K. a. What is the noise power at each filter band setting? b. Assume the carrier power is -125 dBW. Determine the CIN for each case. c. Assume the video bandwidth is 25 MHz.

higher the frequency lower the noise

noise power = 1/14 = 0.78 ms

= 1/20 = 0.05 ms

CIN = ( 25 - 14) = 11 MHZ

for second case = 25 - 20 = 5 MHz

A commercial receiver sold for reception of television programs from satellites has a choice of four filters (14, 20, 26, and 36 MHz wide). Compare the amount o

A commercial receiver sold for reception of television progr

Solution

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