1.

A super heterodyne radio receiver with an intermediate frequency of 455 KHz is tuned to a station operating at 1200 KHz. The associated image frequency is----------- KHz

Answer»

In most receivers the local oscillator frequency is higher than incoming signal i.e. 

f0 = fs + fsi 

f0 – Local oscillator frequency fs = Signal freq fsi = Image freq 

fsi = fs + 2IF 

= 1200+910 = 2110 KHz



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