(1) Flickering on a display screen. Jittering can be caused by the following:
- (a) a number of hardware problems, such as a slow refresh rate, a bad connection between the video adapter and monitor, a hardware malfunction in the monitor, or poor synchronization in the signals being sent;
- (b) a nearby electrical conduit or transformer creating a higher-than-usual local magnetic field level.
(2) In VoIP terminology jitter refers to a type of packet delay where the delay has an impact on the quality of the voice conversation.
(3) Generally, any distortion of a signal or image caused by poor synchronization.