Lord Loh.
Full Member level 4
Image signals.
I would like to know what exactly are image signals (in the context of superhetrodyne receivers) and what is their origin?
My textbook says that it is to be eliminated in the RF amplifier because if it reaches the mixer, it can never be eliminated.
The same textbook says that, the tuned stages of the IF amplifier eliminates the image signals as the lower local oscillator makes the image frequency to deviate further more from the desired IF.
These somewhat contradictory explanations have left me confused...Please help...
I would appreciate any explanations, etext, weblinks or anything that helps me clerify this idea.
Thank you.
I would like to know what exactly are image signals (in the context of superhetrodyne receivers) and what is their origin?
My textbook says that it is to be eliminated in the RF amplifier because if it reaches the mixer, it can never be eliminated.
The same textbook says that, the tuned stages of the IF amplifier eliminates the image signals as the lower local oscillator makes the image frequency to deviate further more from the desired IF.
These somewhat contradictory explanations have left me confused...Please help...
I would appreciate any explanations, etext, weblinks or anything that helps me clerify this idea.
Thank you.