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Radio Receivers - Engineering

Q1:

A receiver having an RF amplifier and an IF of 450 kHz, has Q of the coils 65 and an incoming frequency of 1200 kHz. The image rejection of the receiver is

A 5870

B 3655

C 236

D 13.3

ANS:C - 236

I think , fs+/- 2fi.

1200- (2 * 450) = 300,
300-65 = 235.