Question
Download Solution PDFএকটি AM রেডিও রিসিভারে, 1545 kHz এর RF সংকেতের জন্য, স্থানীয় অসিলেটর ফ্রিকোয়েন্সির মান ______ হবে।
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFসঠিক বিকল্প হল 1
ধারণা:
f LO = স্থানীয় অসিলেটর ফ্রিকোয়েন্সি, যা হিসাবে গণনা করা হয়:
f LO = f s + IF
f s = সংকেতের টিউন করা ফ্রিকোয়েন্সি
I IF = মধ্যবর্তী ফ্রিকোয়েন্সি
এটি নিম্নলিখিত বর্ণালী বিশ্লেষণের সাহায্যে ব্যাখ্যা করা হয়েছে:
গণনা :
একটি AM রেডিও রিসিভারের IF পর্যায় সাধারণত 455 kHz এর একটি আদর্শ IF ফ্রিকোয়েন্সি ব্যবহার করে।
f LO = f s + IF = 1545k + 455k
f LO = 2000 kHz
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