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What is the deviation ratio of an FM phone transmitter having a maximum frequency swing of plus or minus 5 kHz and accepting a maximum modulation rate of 3 kHz?
1.66
Deviation Ratio = Maximum Permitted Frequency Deviation (Δf_max) / Maximum Modulating Frequency (fm_max). Ratio = 5 kHz / 3 kHz ≈ 1.667.
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