A regional emergency-services radio allocation is wide

PHYSICS · Subjective · Fermi University Physics · Electronics, Instrumentation & Communication · Communication systems and RF engineering · Communication systems and RF engineering

Electronics for Measurement, Ch Modulation, receivers and the link that carries the measurement

Problem

A regional emergency-services radio allocation is

12\,\mathrm{MHz}

wide. Each channel carries frequency-modulated voice with a peak deviation

f_{\rm dev}=5\,\mathrm{kHz}

and speech up to

f_m=3\,\mathrm{kHz}

, and adjacent channels are separated by a

5\,\mathrm{kHz}

guard band beyond the Carson-rule transmitted bandwidth. Estimate how many channels the allocation can hold.

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