An FM telemetry system uses a 370 Hz - 430 Hz voltage-controlled oscillator to carry the fuel level of 3000 I tank, where 370 Hz represents an empty tank and 430 Hz represents full tank. What level does 408 Hz represent?

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UPSC ESE Electronics & Communication 2022 Official Paper
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  1. 1900 I
  2. 2533⋅33 I
  3. 3301⋅32 I
  4. 4504⋅18 I

Answer (Detailed Solution Below)

Option 1 : 1900 I
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Detailed Solution

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Explanation:

Δ f1 = 430 - 370 = 60 Hz. From empty tank to full tank

Δ f2 = 408 - 370 = 38 Hz] Empty tank at 408 Hz

408 Hz frequency denoted a fuel level which is given by \(38 \times \frac{{3000}}{{60}} = 1900L\) 

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