# depth of modulation

## Definitions

### Electronics

- A measure of the degree of modulation, usually involving the ratio of a peak variation to a steady non-peak value. The result may be multiplied by 100 to obtain a percentage.
- In
__frequency__ modulation, the ratio of the peak variation of the carrier wave frequency, to the frequency of the modulating signal. The result may be multiplied by 100 to obtain a percentage. - In
__amplitude__ modulation, the __peak amplitude__ variation of the composite __wave__, to the unmodulated carrier amplitude. The result may be multiplied by 100 to obtain a percentage. - In
__amplitude__ modulation, the ratio of half the difference between the maximum amplitude and __minimum__ amplitude, to the average amplitude. The result may be multiplied by 100 to obtain a percentage.

http://www.dictionarycentral.com/definition/depth-of-modulation.html