![]() ![]() ![]() You may have a ground loop problem even with all good components, all correct wiring and a building that is up to code in every way. Testing each component separately (disconnected from the other parts of your system) is the best way to tell.Do I have a ground loop problem? You may have a defective component (TV VCR audio system etc.) causing this problem. ![]() Read about it at and Google the word "Electrocution". With enough voltage/current you can stop breathing or worse. Holding one hand on the equipment while using the other hand to disconnect a cable puts you (and your heart & lungs) in the circuit. Note you can get hurt or killed in rare cases of extreme ground loop problems. Hum and usually displays itself in the form of horizontal lines or a disturbance The voltage difference causes current to flow through theĬoax inducing a (common mode) voltage into the video. Transmission cable is connected between the two chassis it now becomes a currentĬarrying conductor. These outlets carries the same ground voltage on their own chassis. Multiple power panels and high amperage loads. The plastic plate onto the electrical conduit box. The ground (of course) is the screw that you can see and touch, that holds The 120 VAC outlet in one room and the ground on the 120 VAC outlet in another Take a voltmeter with 30-foot leads and measure a voltage between the ground on The losses show up as voltage differences. You can see this in theįast speed of an electrical saw at the outlet and a slower speed at the end ofĪ long extension cord. Wiring in all buildings has losses in the copper wiring. Video effects generators, switchers, computers and much more.ĭetails about the conditions causing ground loops. Type of Interference can affect cameras, video recorders, monitors Each problem must be corrected individually. A ground loop problem may occur at multiple points Ground loops are usually an "after the fact" problem where theĮnd user blames the installer, the installer blames the manufacturer,Īnd the manufacture blames the electricians. It is difficult to predict where a ground This is very hazardous and a violation of UL code. It passes the DC component of the signal.ĭo not remove the middle prong of your 3-prong electrical plugs! The choke is primarily used in high quality applications likeīroadcast TV & ENG (electronic news gathering) etc. The choke provides protection against moderate levels ofĦ0 Hz hum, and protection against very high levels of RF noise. The Premium Hum Bucker blocks the current's path with a videoĪ broadcast-quality Premium Hum Bucker is used for removing humįrom the finest sources of video, it passes DC to hundreds of The transformer is primarily used in CCTV: security, avionics, display, etc.īoth transformer and choke can pass camera control signals.įix for premium equipment is a video isolation choke. It passes about 20 Hz to 4 MHz, and its hum isolation is greater than a choke. The standard Hum Bucker blocks the current's path with a VideoĪ standard quality Hum Bucker is used for removing hum from most Will block the current flow and restore the audio and/or videoįix for standard equipment is a video Isolation transformer. Simply disconnect one side of the coax cable and insert a Humīucker between the coax cable and the equipment. This is related to the workings of a transformer. The AC field can induce a current directly into your cableĪnd superimpose itself onto your audio or video signal showing up as hum or lines. A similar effect can occur when an AC magnetic field comesĬlose to your cable. Itself onto your audio or video signal showing up as hum or lines. (common mode) voltage will drive a current through your cable and superimpose VAC and connected together with your audio or video transmission cable. The name givenĪ difference in the ground voltage between two electronic devices powered by 120 This is the typical scenarioīut any length cable hooked to any equipment can have this problem. That is connected to different circuit breakers. Room to room or longer), with 120 VAC powered equipment at both ends of the cable Relatively long audio or video transmission cables (usually from To the lowest note on a bass guitar or bass drum. Audio hum, 60-cycle noise, 60 Hz hum, similar ![]()
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