Question
Download Solution PDFAM రేడియో రిసీవర్లో, 1545 kHz RF సిగ్నల్ కోసం, స్థానిక ఓసిలేటర్ ఫ్రీక్వెన్సీ విలువ ______ అవుతుంది.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFసరైన ఎంపిక 1
భావన:
f LO = స్థానిక ఓసిలేటర్ ఫ్రీక్వెన్సీ, ఇది ఇలా గణించబడుతుంది:
f LO = f s + IF
f s = సిగ్నల్ యొక్క ట్యూన్డ్ ఫ్రీక్వెన్సీ
I IF = ఇంటర్మీడియట్ ఫ్రీక్వెన్సీ
ఇది క్రింది స్పెక్ట్రమ్ విశ్లేషణ సహాయంతో వివరించబడింది:
గణన:
AM రేడియో రిసీవర్ యొక్క IF దశ సాధారణంగా 455 kHz యొక్క ప్రామాణిక IF ఫ్రీక్వెన్సీని ఉపయోగిస్తుంది.
f LO = f s + IF = 1545k + 455k
f LO = 2000 kHz
Last updated on Jun 26, 2025
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