percent modulation

percent modulation

[pər′sent ‚mäj·ə′lā·shən]
(communications)
The modulation factor expressed as a percentage. Also known as percentage modulation.
References in periodicals archive ?
For our first experiment, we decided on a straightforward comparison of three flicker frequencies: 0 Hz (DC), 100 Hz and 500 Hz, all with a square wave, 100 percent modulation, and a 50 percent duty cycle (Figure 1).
For example, a large visual target of mean luminance 450 cd/m2 flickering at 60 Hz with a modulation of 30 percent can be seen as flickering while the same target at the lower light level of 40 cd/sq m is below the threshold even for 100 percent modulation.