Difference between revisions of "FM Broadcast Radio Frequency Deviation"
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The most basic FM broadcast transmission has the carrier present at 30 Hz, and the modulating frequency is 5 Hz. With a modulation index of 3 the peak frequency deviation about 15 Hz suggesting that the frequency will vary between 15 and 45 Hz. | The most basic FM broadcast transmission has the carrier present at 30 Hz, and the modulating frequency is 5 Hz. With a modulation index of 3 the peak frequency deviation about 15 Hz suggesting that the frequency will vary between 15 and 45 Hz. | ||
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| + | Simplified: deviation is the actual modulation (volume) level, whereas bandwidth the the amount of space needed for the full FM transmission. | ||
[[Category:Electronics]] | [[Category:Electronics]] | ||
[[Category:Radio]] | [[Category:Radio]] | ||
Latest revision as of 10:55, 4 October 2023
The FM broadcasting range, which in the United States is between 87.5 and 108 MHz, uses a typical channel which spans from 100 kHz to 200 kHz, with a maximum frequency deviation of 75 kHz. This deviation of 75kHz can be both negative as well as positive.
- +/- 75kHz (Maximum Deviation)
The most basic FM broadcast transmission has the carrier present at 30 Hz, and the modulating frequency is 5 Hz. With a modulation index of 3 the peak frequency deviation about 15 Hz suggesting that the frequency will vary between 15 and 45 Hz.
Simplified: deviation is the actual modulation (volume) level, whereas bandwidth the the amount of space needed for the full FM transmission.
