Word Count : 273

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In an AM superheterodyne receiver, image frequency and double spotting are important undesired phenomena associated with frequency conversion in the mixer stage. When a radio frequency (RF) signal is mixed with the local oscillator (LO) frequency, the intermediate frequency (IF) is produced as the difference between them. For a desired signal of frequency ( f_s ), the local oscillator is adjusted such that ( f_{IF} = |f_s - ____ ______ ____ ________ ____ ____ ___.
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