• (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.

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