Difference between revisions of "FM Frequency Deviation"
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Describes the maximum difference between an FM modulated frequency and the nominal carrier frequency. FM applications use peak deviations of 75 kHz (200 kHz spacing), 5 kHz (25 kHz spacing), 2.5 kHz (12.5 kHz spacing), and 2 kHz (8.33 kHz spacing). | Describes the maximum difference between an FM modulated frequency and the nominal carrier frequency. FM applications use peak deviations of 75 kHz (200 kHz spacing), 5 kHz (25 kHz spacing), 2.5 kHz (12.5 kHz spacing), and 2 kHz (8.33 kHz spacing). | ||
| − | In ham radio it is common to have an FM transmitter that, as an example, with a 2.5KHz audio tone will have an FM frequency deviation of about 5 KHz. | + | In ham radio it is common to have an FM transmitter that, as an example, with a 2.5KHz audio tone (modulation frequency) will have an FM frequency deviation of about 5 KHz. |
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| + | Modulation Index = Peak Deviation / Modulation Frequency | ||
Latest revision as of 22:17, 3 July 2016
Describes the maximum difference between an FM modulated frequency and the nominal carrier frequency. FM applications use peak deviations of 75 kHz (200 kHz spacing), 5 kHz (25 kHz spacing), 2.5 kHz (12.5 kHz spacing), and 2 kHz (8.33 kHz spacing).
In ham radio it is common to have an FM transmitter that, as an example, with a 2.5KHz audio tone (modulation frequency) will have an FM frequency deviation of about 5 KHz.
Modulation Index = Peak Deviation / Modulation Frequency
