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Земляная петля, разность потенциалов между устройствами протяженной видеосистемы, части которой заземлены в разных местах (приводит к искажениям изображения)
| Глоссарий по системам видеоохраны и видеонаблюдения |
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Ground loop, английский
- An alternating current (ac) that can be produced in a cable. this is usually caused by parts of the system being fed from different electrical sources resulting in different earth potentials at each end of the signal path. this results in interference of the video pictures in the form of a black shadow bar across the screen or as a tearing effect in the top comer of a picture.
- An unwanted interference in the copper electrical signal transmissions with
- An unwanted interference in the copper electrical signal transmissions with shielded cable, which is a result of ground currents when the system has more than one ground. for example, in cctv, when we have a different earthing resistance at the camera, and the switcher or monitor end. the induced electrical noise generated by the surrounding electrical equipment (including mains) does not discharge equally through the two earthings (since they are different) and the induced noise shows up on the monitors as interference.
- Связь через землю; наводки по земле
- A loop formed when unbalanced circuits or components are connected together via two ground paths (the connecting cable shield and the power ground), causing unwanted hum in the system.
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Detection area, английский
Ground loop, английский
- An alternating current (ac) that can be produced in a cable. this is usually caused by parts of the system being fed from different electrical sources resulting in different earth potentials at each end of the signal path. this results in interference of the video pictures in the form of a black shadow bar across the screen or as a tearing effect in the top comer of a picture.
- An unwanted interference in the copper electrical signal transmissions with
- An unwanted interference in the copper electrical signal transmissions with shielded cable, which is a result of ground currents when the system has more than one ground. for example, in cctv, when we have a different earthing resistance at the camera, and the switcher or monitor end. the induced electrical noise generated by the surrounding electrical equipment (including mains) does not discharge equally through the two earthings (since they are different) and the induced noise shows up on the monitors as interference.
- Связь через землю; наводки по земле
- A loop formed when unbalanced circuits or components are connected together via two ground paths (the connecting cable shield and the power ground), causing unwanted hum in the system.
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