Question
Download Solution PDF88 - 108 MHz बैंड में प्रसारित हो रहे FM सिग्नल में 125 kHz का वाहक स्विंग है। मॉड्यूलन सूचकांक है
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFसंकल्पना:
FM में मॉड्यूलन सूचकांक (β) दिया गया है:
\(β = \frac{{Frequency\;deviation}}{{Message\;frequency}} = \frac{Δ f}{{{f_m}}}\)
एक और सूत्र जिसका हम उपयोग कर सकते हैं:
\(β = \frac{{Frequency\;deviation}}{{Maximum\;frequency \; deviation}} = \frac{Δ f}{{{Δ f_m}}}\)
FCC द्वारा अनुमत अधिकतम आवृत्ति बैंड 75 kHz है।
गणना:
दिया गया वाहक स्विंग 125 kHz है, अर्थात्
fmax - fmin = 125 kHz
2 x Δf = 125 kHz
Δf = 62.5 kHz
अब मॉड्यूलन सूचकांक होगा:
\(β = \frac{Δ f}{{{ Δ f_m}}}=\frac{62.5}{75}\)
β = 0.833 = 83%
Last updated on Jan 11, 2024
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