User's Manual

5.7.2.2. Flicker Control
The supported options are: 60Hz & 50Hz
Flicker Control is an anti-flicker feature setting.
AC lamp can cause a flicker effect, which is a consequence of the AC power frequency (50 or 60 Hz). As the light can change from picture
to picture, causing light flicker. This will lead to inconsistent light source between each snapshot. To eliminate flicker, configure your camera to
PAL (60Hz) or NTSC (50Hz) modes to compensate the effects. Check the power supply of your region for proper setting.