Translations:KAVAN V20 + ETHOS™ - User manual/465/en

From KAVAN RC Wiki
PWM Center

This is similar to subtrim, with the difference that an adjustment done here will shift the entire servo band of movement (including hard limits). This adjustment won't be visible on the channel monitor because it is effectively done in the servo. The advantage of using PWM Center to mechanically center the control surface is that this separates the centering function from the trimming function.