depth of modulation meaning

[Electronics]
The degree to which a carrier wave is modulated.

Examples

1. At the receiving end of the communication system, the depth of modulation of the received signal is measured and compared with that of the test signal in each of a number of frequency bands.
2. An aircraft with an on-board ILS receiver within the capture area of an ILS, ( glideslope and localizer range ), will detect varying depths of modulation according to the aircraft's position within that airspace, providing accurate positional information about the progress to the threshold.
3. The strengths of which ( or Difference in Depth of Modulation ) are detected by electronics in the aircraft and present the pilot with an indication to fly left or right and indeed up or down with a co-located glidepath ( 328 . 6 to 335 . 4 MHz ) equipment.