Question
Download Solution PDFIn an AM radio receiver, for an RF signal of 1545 kHz, the value of the local oscillator frequency will be ______.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct option is 1
Concept:
fLO = Local Oscillator frequency, which is calculated as:
fLO = fs + IF
fs = Tuned frequency of the signal
IIF = Intermediate frequency
This is explained with the help of the following spectrum analysis:
Calculation:
The IF stage of an AM radio receiver usually uses a standard IF frequency of 455 kHz.
fLO = fs + IF = 1545k + 455k
fLO = 2000 kHz
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